Mercurial > cpython-lru_cache-weakref

annotate Lib/argparse.py @ 65035:87f4b32905df 2.7

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Cosmetic fix to use print function.
author Hirokazu Yamamoto <ocean-city@m2.ccsnet.ne.jp>
date Fri, 01 Oct 2010 10:48:47 +0000
parents 23c089dc5cff
children 493a2d407c94
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rev   line source
59986
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1 # Author: Steven J. Bethard <steven.bethard@gmail.com>.
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2
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3 """Command-line parsing library
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4
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5 This module is an optparse-inspired command-line parsing library that:
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6
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7 - handles both optional and positional arguments
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8 - produces highly informative usage messages
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9 - supports parsers that dispatch to sub-parsers
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10
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11 The following is a simple usage example that sums integers from the
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12 command-line and writes the result to a file::
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13
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14 parser = argparse.ArgumentParser(
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15 description='sum the integers at the command line')
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16 parser.add_argument(
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17 'integers', metavar='int', nargs='+', type=int,
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18 help='an integer to be summed')
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19 parser.add_argument(
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20 '--log', default=sys.stdout, type=argparse.FileType('w'),
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21 help='the file where the sum should be written')
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22 args = parser.parse_args()
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23 args.log.write('%s' % sum(args.integers))
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24 args.log.close()
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25
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26 The module contains the following public classes:
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27
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28 - ArgumentParser -- The main entry point for command-line parsing. As the
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29 example above shows, the add_argument() method is used to populate
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30 the parser with actions for optional and positional arguments. Then
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31 the parse_args() method is invoked to convert the args at the
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32 command-line into an object with attributes.
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33
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34 - ArgumentError -- The exception raised by ArgumentParser objects when
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35 there are errors with the parser's actions. Errors raised while
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36 parsing the command-line are caught by ArgumentParser and emitted
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37 as command-line messages.
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38
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39 - FileType -- A factory for defining types of files to be created. As the
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40 example above shows, instances of FileType are typically passed as
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41 the type= argument of add_argument() calls.
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42
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43 - Action -- The base class for parser actions. Typically actions are
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44 selected by passing strings like 'store_true' or 'append_const' to
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45 the action= argument of add_argument(). However, for greater
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46 customization of ArgumentParser actions, subclasses of Action may
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47 be defined and passed as the action= argument.
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48
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49 - HelpFormatter, RawDescriptionHelpFormatter, RawTextHelpFormatter,
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50 ArgumentDefaultsHelpFormatter -- Formatter classes which
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51 may be passed as the formatter_class= argument to the
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52 ArgumentParser constructor. HelpFormatter is the default,
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53 RawDescriptionHelpFormatter and RawTextHelpFormatter tell the parser
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54 not to change the formatting for help text, and
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55 ArgumentDefaultsHelpFormatter adds information about argument defaults
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56 to the help.
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57
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58 All other classes in this module are considered implementation details.
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59 (Also note that HelpFormatter and RawDescriptionHelpFormatter are only
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60 considered public as object names -- the API of the formatter objects is
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61 still considered an implementation detail.)
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62 """
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63
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64 __version__ = '1.1'
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65 __all__ = [
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66 'ArgumentParser',
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67 'ArgumentError',
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68 'Namespace',
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69 'Action',
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70 'FileType',
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71 'HelpFormatter',
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72 'RawDescriptionHelpFormatter',
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73 'RawTextHelpFormatter',
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74 'ArgumentDefaultsHelpFormatter',
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75 ]
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76
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77
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78 import copy as _copy
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79 import os as _os
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80 import re as _re
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81 import sys as _sys
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82 import textwrap as _textwrap
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83
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84 from gettext import gettext as _
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85
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86
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87 def _callable(obj):
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88 return hasattr(obj, '__call__') or hasattr(obj, '__bases__')
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89
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90
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91 SUPPRESS = '==SUPPRESS=='
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92
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93 OPTIONAL = '?'
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94 ZERO_OR_MORE = '*'
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95 ONE_OR_MORE = '+'
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96 PARSER = 'A...'
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97 REMAINDER = '...'
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98
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99 # =============================
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100 # Utility functions and classes
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101 # =============================
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102
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103 class _AttributeHolder(object):
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104 """Abstract base class that provides __repr__.
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105
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106 The __repr__ method returns a string in the format::
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107 ClassName(attr=name, attr=name, ...)
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108 The attributes are determined either by a class-level attribute,
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109 '_kwarg_names', or by inspecting the instance __dict__.
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110 """
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111
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112 def __repr__(self):
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113 type_name = type(self).__name__
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114 arg_strings = []
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115 for arg in self._get_args():
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116 arg_strings.append(repr(arg))
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117 for name, value in self._get_kwargs():
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118 arg_strings.append('%s=%r' % (name, value))
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119 return '%s(%s)' % (type_name, ', '.join(arg_strings))
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120
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121 def _get_kwargs(self):
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122 return sorted(self.__dict__.items())
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123
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124 def _get_args(self):
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125 return []
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126
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127
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128 def _ensure_value(namespace, name, value):
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129 if getattr(namespace, name, None) is None:
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130 setattr(namespace, name, value)
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131 return getattr(namespace, name)
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132
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133
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134 # ===============
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135 # Formatting Help
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136 # ===============
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137
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138 class HelpFormatter(object):
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139 """Formatter for generating usage messages and argument help strings.
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140
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141 Only the name of this class is considered a public API. All the methods
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142 provided by the class are considered an implementation detail.
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143 """
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144
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145 def __init__(self,
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146 prog,
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147 indent_increment=2,
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148 max_help_position=24,
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149 width=None):
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150
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151 # default setting for width
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152 if width is None:
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153 try:
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154 width = int(_os.environ['COLUMNS'])
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155 except (KeyError, ValueError):
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156 width = 80
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157 width -= 2
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158
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159 self._prog = prog
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160 self._indent_increment = indent_increment
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161 self._max_help_position = max_help_position
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162 self._width = width
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163
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164 self._current_indent = 0
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165 self._level = 0
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166 self._action_max_length = 0
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167
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168 self._root_section = self._Section(self, None)
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169 self._current_section = self._root_section
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170
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171 self._whitespace_matcher = _re.compile(r'\s+')
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172 self._long_break_matcher = _re.compile(r'\n\n\n+')
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173
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174 # ===============================
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175 # Section and indentation methods
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176 # ===============================
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177 def _indent(self):
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178 self._current_indent += self._indent_increment
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179 self._level += 1
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180
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181 def _dedent(self):
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182 self._current_indent -= self._indent_increment
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183 assert self._current_indent >= 0, 'Indent decreased below 0.'
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184 self._level -= 1
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185
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186 class _Section(object):
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187
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188 def __init__(self, formatter, parent, heading=None):
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189 self.formatter = formatter
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190 self.parent = parent
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191 self.heading = heading
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192 self.items = []
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193
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194 def format_help(self):
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195 # format the indented section
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196 if self.parent is not None:
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197 self.formatter._indent()
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198 join = self.formatter._join_parts
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199 for func, args in self.items:
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200 func(*args)
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201 item_help = join([func(*args) for func, args in self.items])
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202 if self.parent is not None:
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203 self.formatter._dedent()
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204
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205 # return nothing if the section was empty
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206 if not item_help:
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207 return ''
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208
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209 # add the heading if the section was non-empty
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210 if self.heading is not SUPPRESS and self.heading is not None:
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211 current_indent = self.formatter._current_indent
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212 heading = '%*s%s:\n' % (current_indent, '', self.heading)
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213 else:
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214 heading = ''
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215
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216 # join the section-initial newline, the heading and the help
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217 return join(['\n', heading, item_help, '\n'])
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218
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219 def _add_item(self, func, args):
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220 self._current_section.items.append((func, args))
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221
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222 # ========================
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223 # Message building methods
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224 # ========================
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225 def start_section(self, heading):
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226 self._indent()
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227 section = self._Section(self, self._current_section, heading)
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228 self._add_item(section.format_help, [])
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229 self._current_section = section
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230
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231 def end_section(self):
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232 self._current_section = self._current_section.parent
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233 self._dedent()
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234
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235 def add_text(self, text):
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236 if text is not SUPPRESS and text is not None:
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237 self._add_item(self._format_text, [text])
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238
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239 def add_usage(self, usage, actions, groups, prefix=None):
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240 if usage is not SUPPRESS:
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241 args = usage, actions, groups, prefix
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242 self._add_item(self._format_usage, args)
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243
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244 def add_argument(self, action):
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245 if action.help is not SUPPRESS:
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246
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247 # find all invocations
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248 get_invocation = self._format_action_invocation
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249 invocations = [get_invocation(action)]
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250 for subaction in self._iter_indented_subactions(action):
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251 invocations.append(get_invocation(subaction))
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252
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253 # update the maximum item length
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254 invocation_length = max([len(s) for s in invocations])
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255 action_length = invocation_length + self._current_indent
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256 self._action_max_length = max(self._action_max_length,
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diff changeset
257 action_length)
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258
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259 # add the item to the list
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260 self._add_item(self._format_action, [action])
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261
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262 def add_arguments(self, actions):
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263 for action in actions:
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264 self.add_argument(action)
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265
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266 # =======================
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267 # Help-formatting methods
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268 # =======================
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269 def format_help(self):
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270 help = self._root_section.format_help()
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271 if help:
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272 help = self._long_break_matcher.sub('\n\n', help)
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273 help = help.strip('\n') + '\n'
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274 return help
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275
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276 def _join_parts(self, part_strings):
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277 return ''.join([part
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278 for part in part_strings
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279 if part and part is not SUPPRESS])
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280
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281 def _format_usage(self, usage, actions, groups, prefix):
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282 if prefix is None:
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283 prefix = _('usage: ')
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284
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285 # if usage is specified, use that
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286 if usage is not None:
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287 usage = usage % dict(prog=self._prog)
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288
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289 # if no optionals or positionals are available, usage is just prog
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290 elif usage is None and not actions:
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291 usage = '%(prog)s' % dict(prog=self._prog)
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292
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293 # if optionals and positionals are available, calculate usage
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294 elif usage is None:
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295 prog = '%(prog)s' % dict(prog=self._prog)
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296
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297 # split optionals from positionals
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298 optionals = []
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299 positionals = []
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300 for action in actions:
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301 if action.option_strings:
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diff changeset
302 optionals.append(action)
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303 else:
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diff changeset
304 positionals.append(action)
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305
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diff changeset
306 # build full usage string
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307 format = self._format_actions_usage
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diff changeset
308 action_usage = format(optionals + positionals, groups)
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diff changeset
309 usage = ' '.join([s for s in [prog, action_usage] if s])
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diff changeset
310
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
311 # wrap the usage parts if it's too long
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
312 text_width = self._width - self._current_indent
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
313 if len(prefix) + len(usage) > text_width:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
314
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
315 # break usage into wrappable parts
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
316 part_regexp = r'\(.*?\)+|\[.*?\]+|\S+'
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
317 opt_usage = format(optionals, groups)
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
318 pos_usage = format(positionals, groups)
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
319 opt_parts = _re.findall(part_regexp, opt_usage)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
320 pos_parts = _re.findall(part_regexp, pos_usage)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
321 assert ' '.join(opt_parts) == opt_usage
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
322 assert ' '.join(pos_parts) == pos_usage
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
323
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
324 # helper for wrapping lines
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
325 def get_lines(parts, indent, prefix=None):
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
326 lines = []
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
327 line = []
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
328 if prefix is not None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
329 line_len = len(prefix) - 1
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
330 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
331 line_len = len(indent) - 1
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
332 for part in parts:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
333 if line_len + 1 + len(part) > text_width:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
334 lines.append(indent + ' '.join(line))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
335 line = []
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
336 line_len = len(indent) - 1
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
337 line.append(part)
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
338 line_len += len(part) + 1
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
339 if line:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
340 lines.append(indent + ' '.join(line))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
341 if prefix is not None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
342 lines[0] = lines[0][len(indent):]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
343 return lines
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
344
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
345 # if prog is short, follow it with optionals or positionals
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
346 if len(prefix) + len(prog) <= 0.75 * text_width:
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
347 indent = ' ' * (len(prefix) + len(prog) + 1)
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
348 if opt_parts:
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
349 lines = get_lines([prog] + opt_parts, indent, prefix)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
350 lines.extend(get_lines(pos_parts, indent))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
351 elif pos_parts:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
352 lines = get_lines([prog] + pos_parts, indent, prefix)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
353 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
354 lines = [prog]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
355
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
356 # if prog is long, put it on its own line
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
357 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
358 indent = ' ' * len(prefix)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
359 parts = opt_parts + pos_parts
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
360 lines = get_lines(parts, indent)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
361 if len(lines) > 1:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
362 lines = []
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
363 lines.extend(get_lines(opt_parts, indent))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
364 lines.extend(get_lines(pos_parts, indent))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
365 lines = [prog] + lines
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
366
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
367 # join lines into usage
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
368 usage = '\n'.join(lines)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
369
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
370 # prefix with 'usage:'
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
371 return '%s%s\n\n' % (prefix, usage)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
372
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
373 def _format_actions_usage(self, actions, groups):
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
374 # find group indices and identify actions in groups
59281
eba942e77895 remove cross-version compatibility code
Benjamin Peterson <benjamin@python.org>
parents: 59280
diff changeset
375 group_actions = set()
59267
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
376 inserts = {}
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
377 for group in groups:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
378 try:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
379 start = actions.index(group._group_actions[0])
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
380 except ValueError:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
381 continue
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
382 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
383 end = start + len(group._group_actions)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
384 if actions[start:end] == group._group_actions:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
385 for action in group._group_actions:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
386 group_actions.add(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
387 if not group.required:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
388 inserts[start] = '['
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
389 inserts[end] = ']'
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
390 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
391 inserts[start] = '('
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
392 inserts[end] = ')'
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
393 for i in range(start + 1, end):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
394 inserts[i] = '|'
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
395
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
396 # collect all actions format strings
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
397 parts = []
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
398 for i, action in enumerate(actions):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
399
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
400 # suppressed arguments are marked with None
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
401 # remove | separators for suppressed arguments
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
402 if action.help is SUPPRESS:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
403 parts.append(None)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
404 if inserts.get(i) == '|':
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
405 inserts.pop(i)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
406 elif inserts.get(i + 1) == '|':
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
407 inserts.pop(i + 1)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
408
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
409 # produce all arg strings
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
410 elif not action.option_strings:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
411 part = self._format_args(action, action.dest)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
412
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
413 # if it's in a group, strip the outer []
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
414 if action in group_actions:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
415 if part[0] == '[' and part[-1] == ']':
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
416 part = part[1:-1]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
417
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
418 # add the action string to the list
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
419 parts.append(part)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
420
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
421 # produce the first way to invoke the option in brackets
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
422 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
423 option_string = action.option_strings[0]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
424
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
425 # if the Optional doesn't take a value, format is:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
426 # -s or --long
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
427 if action.nargs == 0:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
428 part = '%s' % option_string
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
429
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
430 # if the Optional takes a value, format is:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
431 # -s ARGS or --long ARGS
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
432 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
433 default = action.dest.upper()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
434 args_string = self._format_args(action, default)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
435 part = '%s %s' % (option_string, args_string)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
436
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
437 # make it look optional if it's not required or in a group
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
438 if not action.required and action not in group_actions:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
439 part = '[%s]' % part
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
440
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
441 # add the action string to the list
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
442 parts.append(part)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
443
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
444 # insert things at the necessary indices
59281
eba942e77895 remove cross-version compatibility code
Benjamin Peterson <benjamin@python.org>
parents: 59280
diff changeset
445 for i in sorted(inserts, reverse=True):
59267
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
446 parts[i:i] = [inserts[i]]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
447
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
448 # join all the action items with spaces
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
449 text = ' '.join([item for item in parts if item is not None])
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
450
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
451 # clean up separators for mutually exclusive groups
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
452 open = r'[\[(]'
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
453 close = r'[\])]'
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
454 text = _re.sub(r'(%s) ' % open, r'\1', text)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
455 text = _re.sub(r' (%s)' % close, r'\1', text)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
456 text = _re.sub(r'%s *%s' % (open, close), r'', text)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
457 text = _re.sub(r'\(([^|]*)\)', r'\1', text)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
458 text = text.strip()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
459
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
460 # return the text
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
461 return text
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
462
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
463 def _format_text(self, text):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
464 if '%(prog)' in text:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
465 text = text % dict(prog=self._prog)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
466 text_width = self._width - self._current_indent
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
467 indent = ' ' * self._current_indent
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
468 return self._fill_text(text, text_width, indent) + '\n\n'
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
469
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
470 def _format_action(self, action):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
471 # determine the required width and the entry label
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
472 help_position = min(self._action_max_length + 2,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
473 self._max_help_position)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
474 help_width = self._width - help_position
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
475 action_width = help_position - self._current_indent - 2
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
476 action_header = self._format_action_invocation(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
477
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
478 # ho nelp; start on same line and add a final newline
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
479 if not action.help:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
480 tup = self._current_indent, '', action_header
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
481 action_header = '%*s%s\n' % tup
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
482
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
483 # short action name; start on the same line and pad two spaces
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
484 elif len(action_header) <= action_width:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
485 tup = self._current_indent, '', action_width, action_header
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
486 action_header = '%*s%-*s ' % tup
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
487 indent_first = 0
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
488
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
489 # long action name; start on the next line
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
490 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
491 tup = self._current_indent, '', action_header
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
492 action_header = '%*s%s\n' % tup
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
493 indent_first = help_position
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
494
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
495 # collect the pieces of the action help
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
496 parts = [action_header]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
497
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
498 # if there was help for the action, add lines of help text
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
499 if action.help:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
500 help_text = self._expand_help(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
501 help_lines = self._split_lines(help_text, help_width)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
502 parts.append('%*s%s\n' % (indent_first, '', help_lines[0]))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
503 for line in help_lines[1:]:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
504 parts.append('%*s%s\n' % (help_position, '', line))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
505
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
506 # or add a newline if the description doesn't end with one
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
507 elif not action_header.endswith('\n'):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
508 parts.append('\n')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
509
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
510 # if there are any sub-actions, add their help as well
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
511 for subaction in self._iter_indented_subactions(action):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
512 parts.append(self._format_action(subaction))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
513
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
514 # return a single string
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
515 return self._join_parts(parts)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
516
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
517 def _format_action_invocation(self, action):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
518 if not action.option_strings:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
519 metavar, = self._metavar_formatter(action, action.dest)(1)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
520 return metavar
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
521
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
522 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
523 parts = []
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
524
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
525 # if the Optional doesn't take a value, format is:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
526 # -s, --long
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
527 if action.nargs == 0:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
528 parts.extend(action.option_strings)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
529
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
530 # if the Optional takes a value, format is:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
531 # -s ARGS, --long ARGS
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
532 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
533 default = action.dest.upper()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
534 args_string = self._format_args(action, default)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
535 for option_string in action.option_strings:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
536 parts.append('%s %s' % (option_string, args_string))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
537
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
538 return ', '.join(parts)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
539
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
540 def _metavar_formatter(self, action, default_metavar):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
541 if action.metavar is not None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
542 result = action.metavar
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
543 elif action.choices is not None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
544 choice_strs = [str(choice) for choice in action.choices]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
545 result = '{%s}' % ','.join(choice_strs)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
546 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
547 result = default_metavar
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
548
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
549 def format(tuple_size):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
550 if isinstance(result, tuple):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
551 return result
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
552 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
553 return (result, ) * tuple_size
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
554 return format
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
555
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
556 def _format_args(self, action, default_metavar):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
557 get_metavar = self._metavar_formatter(action, default_metavar)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
558 if action.nargs is None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
559 result = '%s' % get_metavar(1)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
560 elif action.nargs == OPTIONAL:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
561 result = '[%s]' % get_metavar(1)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
562 elif action.nargs == ZERO_OR_MORE:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
563 result = '[%s [%s ...]]' % get_metavar(2)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
564 elif action.nargs == ONE_OR_MORE:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
565 result = '%s [%s ...]' % get_metavar(2)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
566 elif action.nargs == REMAINDER:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
567 result = '...'
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
568 elif action.nargs == PARSER:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
569 result = '%s ...' % get_metavar(1)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
570 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
571 formats = ['%s' for _ in range(action.nargs)]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
572 result = ' '.join(formats) % get_metavar(action.nargs)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
573 return result
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
574
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
575 def _expand_help(self, action):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
576 params = dict(vars(action), prog=self._prog)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
577 for name in list(params):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
578 if params[name] is SUPPRESS:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
579 del params[name]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
580 for name in list(params):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
581 if hasattr(params[name], '__name__'):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
582 params[name] = params[name].__name__
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
583 if params.get('choices') is not None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
584 choices_str = ', '.join([str(c) for c in params['choices']])
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
585 params['choices'] = choices_str
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
586 return self._get_help_string(action) % params
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
587
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
588 def _iter_indented_subactions(self, action):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
589 try:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
590 get_subactions = action._get_subactions
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
591 except AttributeError:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
592 pass
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
593 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
594 self._indent()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
595 for subaction in get_subactions():
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
596 yield subaction
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
597 self._dedent()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
598
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
599 def _split_lines(self, text, width):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
600 text = self._whitespace_matcher.sub(' ', text).strip()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
601 return _textwrap.wrap(text, width)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
602
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
603 def _fill_text(self, text, width, indent):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
604 text = self._whitespace_matcher.sub(' ', text).strip()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
605 return _textwrap.fill(text, width, initial_indent=indent,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
606 subsequent_indent=indent)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
607
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
608 def _get_help_string(self, action):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
609 return action.help
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
610
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
611
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
612 class RawDescriptionHelpFormatter(HelpFormatter):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
613 """Help message formatter which retains any formatting in descriptions.
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
614
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
615 Only the name of this class is considered a public API. All the methods
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
616 provided by the class are considered an implementation detail.
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
617 """
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parents: 59266
diff changeset
618
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
619 def _fill_text(self, text, width, indent):
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
620 return ''.join([indent + line for line in text.splitlines(True)])
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
621
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
622
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
623 class RawTextHelpFormatter(RawDescriptionHelpFormatter):
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
624 """Help message formatter which retains formatting of all help text.
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
625
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
626 Only the name of this class is considered a public API. All the methods
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
627 provided by the class are considered an implementation detail.
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
628 """
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
629
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
630 def _split_lines(self, text, width):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
631 return text.splitlines()
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
632
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
633
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
634 class ArgumentDefaultsHelpFormatter(HelpFormatter):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
635 """Help message formatter which adds default values to argument help.
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
636
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
637 Only the name of this class is considered a public API. All the methods
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
638 provided by the class are considered an implementation detail.
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
639 """
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
640
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
641 def _get_help_string(self, action):
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
642 help = action.help
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
643 if '%(default)' not in action.help:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
644 if action.default is not SUPPRESS:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
645 defaulting_nargs = [OPTIONAL, ZERO_OR_MORE]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
646 if action.option_strings or action.nargs in defaulting_nargs:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
647 help += ' (default: %(default)s)'
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
648 return help
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
649
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
650
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
651 # =====================
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
652 # Options and Arguments
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
653 # =====================
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
654
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
655 def _get_action_name(argument):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
656 if argument is None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
657 return None
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
658 elif argument.option_strings:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
659 return '/'.join(argument.option_strings)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
660 elif argument.metavar not in (None, SUPPRESS):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
661 return argument.metavar
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
662 elif argument.dest not in (None, SUPPRESS):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
663 return argument.dest
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
664 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
665 return None
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
666
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
667
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
668 class ArgumentError(Exception):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
669 """An error from creating or using an argument (optional or positional).
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
670
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
671 The string value of this exception is the message, augmented with
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
672 information about the argument that caused it.
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
673 """
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
674
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
675 def __init__(self, argument, message):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
676 self.argument_name = _get_action_name(argument)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
677 self.message = message
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
678
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
679 def __str__(self):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
680 if self.argument_name is None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
681 format = '%(message)s'
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
682 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
683 format = 'argument %(argument_name)s: %(message)s'
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
684 return format % dict(message=self.message,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
685 argument_name=self.argument_name)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
686
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
687
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
688 class ArgumentTypeError(Exception):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
689 """An error from trying to convert a command line string to a type."""
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
690 pass
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
691
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
692
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
693 # ==============
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
694 # Action classes
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
695 # ==============
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
696
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
697 class Action(_AttributeHolder):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
698 """Information about how to convert command line strings to Python objects.
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
699
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
700 Action objects are used by an ArgumentParser to represent the information
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
701 needed to parse a single argument from one or more strings from the
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
702 command line. The keyword arguments to the Action constructor are also
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
703 all attributes of Action instances.
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
704
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
705 Keyword Arguments:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
706
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
707 - option_strings -- A list of command-line option strings which
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
708 should be associated with this action.
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
709
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
710 - dest -- The name of the attribute to hold the created object(s)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
711
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
712 - nargs -- The number of command-line arguments that should be
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
713 consumed. By default, one argument will be consumed and a single
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
714 value will be produced. Other values include:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
715 - N (an integer) consumes N arguments (and produces a list)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
716 - '?' consumes zero or one arguments
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
717 - '*' consumes zero or more arguments (and produces a list)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
718 - '+' consumes one or more arguments (and produces a list)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
719 Note that the difference between the default and nargs=1 is that
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
720 with the default, a single value will be produced, while with
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
721 nargs=1, a list containing a single value will be produced.
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
722
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
723 - const -- The value to be produced if the option is specified and the
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
724 option uses an action that takes no values.
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
725
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
726 - default -- The value to be produced if the option is not specified.
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
727
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
728 - type -- The type which the command-line arguments should be converted
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
729 to, should be one of 'string', 'int', 'float', 'complex' or a
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
730 callable object that accepts a single string argument. If None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
731 'string' is assumed.
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
732
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
733 - choices -- A container of values that should be allowed. If not None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
734 after a command-line argument has been converted to the appropriate
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
735 type, an exception will be raised if it is not a member of this
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
736 collection.
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
737
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
738 - required -- True if the action must always be specified at the
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
739 command line. This is only meaningful for optional command-line
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
740 arguments.
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
741
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
742 - help -- The help string describing the argument.
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
743
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
744 - metavar -- The name to be used for the option's argument with the
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
745 help string. If None, the 'dest' value will be used as the name.
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
746 """
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
747
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
748 def __init__(self,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
749 option_strings,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
750 dest,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
751 nargs=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
752 const=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
753 default=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
754 type=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
755 choices=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
756 required=False,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
757 help=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
758 metavar=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
759 self.option_strings = option_strings
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
760 self.dest = dest
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
761 self.nargs = nargs
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
762 self.const = const
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
763 self.default = default
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
764 self.type = type
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
765 self.choices = choices
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
766 self.required = required
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
767 self.help = help
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
768 self.metavar = metavar
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
769
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
770 def _get_kwargs(self):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
771 names = [
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
772 'option_strings',
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
773 'dest',
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
774 'nargs',
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
775 'const',
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
776 'default',
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
777 'type',
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
778 'choices',
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
779 'help',
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
780 'metavar',
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
781 ]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
782 return [(name, getattr(self, name)) for name in names]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
783
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
784 def __call__(self, parser, namespace, values, option_string=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
785 raise NotImplementedError(_('.__call__() not defined'))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
786
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
787
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
788 class _StoreAction(Action):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
789
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
790 def __init__(self,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
791 option_strings,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
792 dest,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
793 nargs=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
794 const=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
795 default=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
796 type=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
797 choices=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
798 required=False,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
799 help=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
800 metavar=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
801 if nargs == 0:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
802 raise ValueError('nargs for store actions must be > 0; if you '
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
803 'have nothing to store, actions such as store '
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
804 'true or store const may be more appropriate')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
805 if const is not None and nargs != OPTIONAL:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
806 raise ValueError('nargs must be %r to supply const' % OPTIONAL)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
807 super(_StoreAction, self).__init__(
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
808 option_strings=option_strings,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
809 dest=dest,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
810 nargs=nargs,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
811 const=const,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
812 default=default,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
813 type=type,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
814 choices=choices,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
815 required=required,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
816 help=help,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
817 metavar=metavar)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
818
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
819 def __call__(self, parser, namespace, values, option_string=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
820 setattr(namespace, self.dest, values)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
821
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
822
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
823 class _StoreConstAction(Action):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
824
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
825 def __init__(self,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
826 option_strings,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
827 dest,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
828 const,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
829 default=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
830 required=False,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
831 help=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
832 metavar=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
833 super(_StoreConstAction, self).__init__(
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
834 option_strings=option_strings,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
835 dest=dest,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
836 nargs=0,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
837 const=const,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
838 default=default,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
839 required=required,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
840 help=help)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
841
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
842 def __call__(self, parser, namespace, values, option_string=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
843 setattr(namespace, self.dest, self.const)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
844
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
845
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
846 class _StoreTrueAction(_StoreConstAction):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
847
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
848 def __init__(self,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
849 option_strings,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
850 dest,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
851 default=False,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
852 required=False,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
853 help=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
854 super(_StoreTrueAction, self).__init__(
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
855 option_strings=option_strings,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
856 dest=dest,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
857 const=True,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
858 default=default,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
859 required=required,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
860 help=help)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
861
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
862
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
863 class _StoreFalseAction(_StoreConstAction):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
864
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
865 def __init__(self,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
866 option_strings,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
867 dest,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
868 default=True,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
869 required=False,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
870 help=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
871 super(_StoreFalseAction, self).__init__(
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
872 option_strings=option_strings,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
873 dest=dest,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
874 const=False,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
875 default=default,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
876 required=required,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
877 help=help)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
878
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
879
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
880 class _AppendAction(Action):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
881
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
882 def __init__(self,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
883 option_strings,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
884 dest,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
885 nargs=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
886 const=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
887 default=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
888 type=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
889 choices=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
890 required=False,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
891 help=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
892 metavar=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
893 if nargs == 0:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
894 raise ValueError('nargs for append actions must be > 0; if arg '
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
895 'strings are not supplying the value to append, '
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
896 'the append const action may be more appropriate')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
897 if const is not None and nargs != OPTIONAL:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
898 raise ValueError('nargs must be %r to supply const' % OPTIONAL)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
899 super(_AppendAction, self).__init__(
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
900 option_strings=option_strings,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
901 dest=dest,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
902 nargs=nargs,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
903 const=const,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
904 default=default,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
905 type=type,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
906 choices=choices,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
907 required=required,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
908 help=help,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
909 metavar=metavar)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
910
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
911 def __call__(self, parser, namespace, values, option_string=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
912 items = _copy.copy(_ensure_value(namespace, self.dest, []))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
913 items.append(values)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
914 setattr(namespace, self.dest, items)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
915
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
916
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
917 class _AppendConstAction(Action):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
918
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
919 def __init__(self,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
920 option_strings,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
921 dest,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
922 const,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
923 default=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
924 required=False,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
925 help=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
926 metavar=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
927 super(_AppendConstAction, self).__init__(
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
928 option_strings=option_strings,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
929 dest=dest,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
930 nargs=0,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
931 const=const,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
932 default=default,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
933 required=required,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
934 help=help,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
935 metavar=metavar)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
936
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
937 def __call__(self, parser, namespace, values, option_string=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
938 items = _copy.copy(_ensure_value(namespace, self.dest, []))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
939 items.append(self.const)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
940 setattr(namespace, self.dest, items)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
941
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
942
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
943 class _CountAction(Action):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
944
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
945 def __init__(self,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
946 option_strings,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
947 dest,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
948 default=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
949 required=False,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
950 help=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
951 super(_CountAction, self).__init__(
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
952 option_strings=option_strings,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
953 dest=dest,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
954 nargs=0,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
955 default=default,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
956 required=required,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
957 help=help)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
958
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
959 def __call__(self, parser, namespace, values, option_string=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
960 new_count = _ensure_value(namespace, self.dest, 0) + 1
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
961 setattr(namespace, self.dest, new_count)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
962
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
963
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
964 class _HelpAction(Action):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
965
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
966 def __init__(self,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
967 option_strings,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
968 dest=SUPPRESS,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
969 default=SUPPRESS,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
970 help=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
971 super(_HelpAction, self).__init__(
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
972 option_strings=option_strings,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
973 dest=dest,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
974 default=default,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
975 nargs=0,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
976 help=help)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
977
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
978 def __call__(self, parser, namespace, values, option_string=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
979 parser.print_help()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
980 parser.exit()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
981
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
982
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
983 class _VersionAction(Action):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
984
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
985 def __init__(self,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
986 option_strings,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
987 version=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
988 dest=SUPPRESS,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
989 default=SUPPRESS,
61879
e64ea1619820 Fix default value for version help. Approved by Benjamin on python-dev: http://mail.python.org/pipermail/python-dev/2010-May/100231.html
Steven Bethard <steven.bethard@gmail.com>
parents: 59986
diff changeset
990 help="show program's version number and exit"):
59267
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
991 super(_VersionAction, self).__init__(
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
992 option_strings=option_strings,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
993 dest=dest,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
994 default=default,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
995 nargs=0,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
996 help=help)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
997 self.version = version
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
998
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
999 def __call__(self, parser, namespace, values, option_string=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1000 version = self.version
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1001 if version is None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1002 version = parser.version
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1003 formatter = parser._get_formatter()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1004 formatter.add_text(version)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1005 parser.exit(message=formatter.format_help())
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1006
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1007
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1008 class _SubParsersAction(Action):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1009
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1010 class _ChoicesPseudoAction(Action):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1011
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1012 def __init__(self, name, help):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1013 sup = super(_SubParsersAction._ChoicesPseudoAction, self)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1014 sup.__init__(option_strings=[], dest=name, help=help)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1015
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1016 def __init__(self,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1017 option_strings,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1018 prog,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1019 parser_class,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1020 dest=SUPPRESS,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1021 help=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1022 metavar=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1023
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1024 self._prog_prefix = prog
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1025 self._parser_class = parser_class
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1026 self._name_parser_map = {}
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1027 self._choices_actions = []
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1028
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1029 super(_SubParsersAction, self).__init__(
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1030 option_strings=option_strings,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1031 dest=dest,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1032 nargs=PARSER,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1033 choices=self._name_parser_map,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1034 help=help,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1035 metavar=metavar)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1036
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1037 def add_parser(self, name, **kwargs):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1038 # set prog from the existing prefix
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1039 if kwargs.get('prog') is None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1040 kwargs['prog'] = '%s %s' % (self._prog_prefix, name)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1041
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1042 # create a pseudo-action to hold the choice help
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1043 if 'help' in kwargs:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1044 help = kwargs.pop('help')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1045 choice_action = self._ChoicesPseudoAction(name, help)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1046 self._choices_actions.append(choice_action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1047
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1048 # create the parser and add it to the map
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1049 parser = self._parser_class(**kwargs)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1050 self._name_parser_map[name] = parser
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1051 return parser
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1052
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1053 def _get_subactions(self):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1054 return self._choices_actions
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1055
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1056 def __call__(self, parser, namespace, values, option_string=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1057 parser_name = values[0]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1058 arg_strings = values[1:]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1059
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1060 # set the parser name if requested
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1061 if self.dest is not SUPPRESS:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1062 setattr(namespace, self.dest, parser_name)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1063
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1064 # select the parser
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1065 try:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1066 parser = self._name_parser_map[parser_name]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1067 except KeyError:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1068 tup = parser_name, ', '.join(self._name_parser_map)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1069 msg = _('unknown parser %r (choices: %s)' % tup)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1070 raise ArgumentError(self, msg)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1071
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1072 # parse all the remaining options into the namespace
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1073 parser.parse_args(arg_strings, namespace)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1074
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1075
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1076 # ==============
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1077 # Type classes
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1078 # ==============
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1079
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1080 class FileType(object):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1081 """Factory for creating file object types
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1082
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1083 Instances of FileType are typically passed as type= arguments to the
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1084 ArgumentParser add_argument() method.
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1085
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1086 Keyword Arguments:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1087 - mode -- A string indicating how the file is to be opened. Accepts the
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1088 same values as the builtin open() function.
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1089 - bufsize -- The file's desired buffer size. Accepts the same values as
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1090 the builtin open() function.
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1091 """
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1092
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1093 def __init__(self, mode='r', bufsize=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1094 self._mode = mode
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1095 self._bufsize = bufsize
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1096
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1097 def __call__(self, string):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1098 # the special argument "-" means sys.std{in,out}
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1099 if string == '-':
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1100 if 'r' in self._mode:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1101 return _sys.stdin
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1102 elif 'w' in self._mode:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1103 return _sys.stdout
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1104 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1105 msg = _('argument "-" with mode %r' % self._mode)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1106 raise ValueError(msg)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1107
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1108 # all other arguments are used as file names
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1109 if self._bufsize:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1110 return open(string, self._mode, self._bufsize)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1111 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1112 return open(string, self._mode)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1113
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1114 def __repr__(self):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1115 args = [self._mode, self._bufsize]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1116 args_str = ', '.join([repr(arg) for arg in args if arg is not None])
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1117 return '%s(%s)' % (type(self).__name__, args_str)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1118
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1119 # ===========================
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1120 # Optional and Positional Parsing
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1121 # ===========================
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1122
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1123 class Namespace(_AttributeHolder):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1124 """Simple object for storing attributes.
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1125
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1126 Implements equality by attribute names and values, and provides a simple
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1127 string representation.
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1128 """
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Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1129
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1130 def __init__(self, **kwargs):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1131 for name in kwargs:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1132 setattr(self, name, kwargs[name])
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1133
59423
0802bc973b32 eliminate py3k warnings in argparse
Benjamin Peterson <benjamin@python.org>
parents: 59281
diff changeset
1134 __hash__ = None
0802bc973b32 eliminate py3k warnings in argparse
Benjamin Peterson <benjamin@python.org>
parents: 59281
diff changeset
1135
59267
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1136 def __eq__(self, other):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1137 return vars(self) == vars(other)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1138
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1139 def __ne__(self, other):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1140 return not (self == other)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1141
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1142 def __contains__(self, key):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1143 return key in self.__dict__
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1144
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1145
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1146 class _ActionsContainer(object):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1147
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1148 def __init__(self,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1149 description,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1150 prefix_chars,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1151 argument_default,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1152 conflict_handler):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1153 super(_ActionsContainer, self).__init__()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1154
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1155 self.description = description
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1156 self.argument_default = argument_default
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1157 self.prefix_chars = prefix_chars
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1158 self.conflict_handler = conflict_handler
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1159
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1160 # set up registries
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1161 self._registries = {}
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1162
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1163 # register actions
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1164 self.register('action', None, _StoreAction)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1165 self.register('action', 'store', _StoreAction)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1166 self.register('action', 'store_const', _StoreConstAction)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1167 self.register('action', 'store_true', _StoreTrueAction)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1168 self.register('action', 'store_false', _StoreFalseAction)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1169 self.register('action', 'append', _AppendAction)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1170 self.register('action', 'append_const', _AppendConstAction)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1171 self.register('action', 'count', _CountAction)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1172 self.register('action', 'help', _HelpAction)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1173 self.register('action', 'version', _VersionAction)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1174 self.register('action', 'parsers', _SubParsersAction)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1175
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1176 # raise an exception if the conflict handler is invalid
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1177 self._get_handler()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1178
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1179 # action storage
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1180 self._actions = []
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1181 self._option_string_actions = {}
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1182
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1183 # groups
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1184 self._action_groups = []
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1185 self._mutually_exclusive_groups = []
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1186
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1187 # defaults storage
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1188 self._defaults = {}
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1189
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1190 # determines whether an "option" looks like a negative number
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1191 self._negative_number_matcher = _re.compile(r'^-\d+$|^-\d*\.\d+$')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1192
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1193 # whether or not there are any optionals that look like negative
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1194 # numbers -- uses a list so it can be shared and edited
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1195 self._has_negative_number_optionals = []
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1196
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1197 # ====================
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1198 # Registration methods
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1199 # ====================
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1200 def register(self, registry_name, value, object):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1201 registry = self._registries.setdefault(registry_name, {})
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1202 registry[value] = object
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1203
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1204 def _registry_get(self, registry_name, value, default=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1205 return self._registries[registry_name].get(value, default)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1206
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1207 # ==================================
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1208 # Namespace default accessor methods
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1209 # ==================================
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1210 def set_defaults(self, **kwargs):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1211 self._defaults.update(kwargs)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1212
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1213 # if these defaults match any existing arguments, replace
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1214 # the previous default on the object with the new one
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1215 for action in self._actions:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1216 if action.dest in kwargs:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1217 action.default = kwargs[action.dest]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1218
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1219 def get_default(self, dest):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1220 for action in self._actions:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1221 if action.dest == dest and action.default is not None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1222 return action.default
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1223 return self._defaults.get(dest, None)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1224
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1225
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1226 # =======================
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1227 # Adding argument actions
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1228 # =======================
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1229 def add_argument(self, *args, **kwargs):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1230 """
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1231 add_argument(dest, ..., name=value, ...)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1232 add_argument(option_string, option_string, ..., name=value, ...)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1233 """
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1234
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1235 # if no positional args are supplied or only one is supplied and
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1236 # it doesn't look like an option string, parse a positional
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1237 # argument
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1238 chars = self.prefix_chars
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1239 if not args or len(args) == 1 and args[0][0] not in chars:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1240 if args and 'dest' in kwargs:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1241 raise ValueError('dest supplied twice for positional argument')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1242 kwargs = self._get_positional_kwargs(*args, **kwargs)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1243
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1244 # otherwise, we're adding an optional argument
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1245 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1246 kwargs = self._get_optional_kwargs(*args, **kwargs)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1247
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1248 # if no default was supplied, use the parser-level default
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1249 if 'default' not in kwargs:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1250 dest = kwargs['dest']
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1251 if dest in self._defaults:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1252 kwargs['default'] = self._defaults[dest]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1253 elif self.argument_default is not None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1254 kwargs['default'] = self.argument_default
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1255
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1256 # create the action object, and add it to the parser
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1257 action_class = self._pop_action_class(kwargs)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1258 if not _callable(action_class):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1259 raise ValueError('unknown action "%s"' % action_class)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1260 action = action_class(**kwargs)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1261
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1262 # raise an error if the action type is not callable
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1263 type_func = self._registry_get('type', action.type, action.type)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1264 if not _callable(type_func):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1265 raise ValueError('%r is not callable' % type_func)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1266
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1267 return self._add_action(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1268
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1269 def add_argument_group(self, *args, **kwargs):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1270 group = _ArgumentGroup(self, *args, **kwargs)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1271 self._action_groups.append(group)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1272 return group
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1273
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1274 def add_mutually_exclusive_group(self, **kwargs):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1275 group = _MutuallyExclusiveGroup(self, **kwargs)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1276 self._mutually_exclusive_groups.append(group)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1277 return group
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1278
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1279 def _add_action(self, action):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1280 # resolve any conflicts
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1281 self._check_conflict(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1282
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1283 # add to actions list
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1284 self._actions.append(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1285 action.container = self
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1286
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1287 # index the action by any option strings it has
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1288 for option_string in action.option_strings:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1289 self._option_string_actions[option_string] = action
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1290
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1291 # set the flag if any option strings look like negative numbers
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1292 for option_string in action.option_strings:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1293 if self._negative_number_matcher.match(option_string):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1294 if not self._has_negative_number_optionals:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1295 self._has_negative_number_optionals.append(True)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1296
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1297 # return the created action
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1298 return action
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1299
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1300 def _remove_action(self, action):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1301 self._actions.remove(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1302
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1303 def _add_container_actions(self, container):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1304 # collect groups by titles
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1305 title_group_map = {}
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1306 for group in self._action_groups:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1307 if group.title in title_group_map:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1308 msg = _('cannot merge actions - two groups are named %r')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1309 raise ValueError(msg % (group.title))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1310 title_group_map[group.title] = group
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1311
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1312 # map each action to its group
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1313 group_map = {}
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1314 for group in container._action_groups:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1315
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1316 # if a group with the title exists, use that, otherwise
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1317 # create a new group matching the container's group
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1318 if group.title not in title_group_map:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1319 title_group_map[group.title] = self.add_argument_group(
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1320 title=group.title,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1321 description=group.description,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1322 conflict_handler=group.conflict_handler)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1323
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1324 # map the actions to their new group
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1325 for action in group._group_actions:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1326 group_map[action] = title_group_map[group.title]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1327
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1328 # add container's mutually exclusive groups
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1329 # NOTE: if add_mutually_exclusive_group ever gains title= and
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1330 # description= then this code will need to be expanded as above
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1331 for group in container._mutually_exclusive_groups:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1332 mutex_group = self.add_mutually_exclusive_group(
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1333 required=group.required)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1334
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1335 # map the actions to their new mutex group
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1336 for action in group._group_actions:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1337 group_map[action] = mutex_group
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1338
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1339 # add all actions to this container or their group
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1340 for action in container._actions:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1341 group_map.get(action, self)._add_action(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1342
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1343 def _get_positional_kwargs(self, dest, **kwargs):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1344 # make sure required is not specified
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1345 if 'required' in kwargs:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1346 msg = _("'required' is an invalid argument for positionals")
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1347 raise TypeError(msg)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1348
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1349 # mark positional arguments as required if at least one is
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1350 # always required
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1351 if kwargs.get('nargs') not in [OPTIONAL, ZERO_OR_MORE]:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1352 kwargs['required'] = True
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1353 if kwargs.get('nargs') == ZERO_OR_MORE and 'default' not in kwargs:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1354 kwargs['required'] = True
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1355
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1356 # return the keyword arguments with no option strings
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1357 return dict(kwargs, dest=dest, option_strings=[])
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1358
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1359 def _get_optional_kwargs(self, *args, **kwargs):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1360 # determine short and long option strings
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1361 option_strings = []
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1362 long_option_strings = []
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1363 for option_string in args:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1364 # error on strings that don't start with an appropriate prefix
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1365 if not option_string[0] in self.prefix_chars:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1366 msg = _('invalid option string %r: '
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1367 'must start with a character %r')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1368 tup = option_string, self.prefix_chars
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1369 raise ValueError(msg % tup)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1370
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1371 # strings starting with two prefix characters are long options
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1372 option_strings.append(option_string)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1373 if option_string[0] in self.prefix_chars:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1374 if len(option_string) > 1:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1375 if option_string[1] in self.prefix_chars:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1376 long_option_strings.append(option_string)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1377
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1378 # infer destination, '--foo-bar' -> 'foo_bar' and '-x' -> 'x'
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1379 dest = kwargs.pop('dest', None)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1380 if dest is None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1381 if long_option_strings:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1382 dest_option_string = long_option_strings[0]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1383 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1384 dest_option_string = option_strings[0]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1385 dest = dest_option_string.lstrip(self.prefix_chars)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1386 if not dest:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1387 msg = _('dest= is required for options like %r')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1388 raise ValueError(msg % option_string)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1389 dest = dest.replace('-', '_')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1390
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1391 # return the updated keyword arguments
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1392 return dict(kwargs, dest=dest, option_strings=option_strings)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1393
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1394 def _pop_action_class(self, kwargs, default=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1395 action = kwargs.pop('action', default)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1396 return self._registry_get('action', action, action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1397
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1398 def _get_handler(self):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1399 # determine function from conflict handler string
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1400 handler_func_name = '_handle_conflict_%s' % self.conflict_handler
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1401 try:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1402 return getattr(self, handler_func_name)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1403 except AttributeError:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1404 msg = _('invalid conflict_resolution value: %r')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1405 raise ValueError(msg % self.conflict_handler)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1406
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1407 def _check_conflict(self, action):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1408
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1409 # find all options that conflict with this option
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1410 confl_optionals = []
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1411 for option_string in action.option_strings:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1412 if option_string in self._option_string_actions:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1413 confl_optional = self._option_string_actions[option_string]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1414 confl_optionals.append((option_string, confl_optional))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1415
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1416 # resolve any conflicts
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1417 if confl_optionals:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1418 conflict_handler = self._get_handler()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1419 conflict_handler(action, confl_optionals)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1420
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1421 def _handle_conflict_error(self, action, conflicting_actions):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1422 message = _('conflicting option string(s): %s')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1423 conflict_string = ', '.join([option_string
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1424 for option_string, action
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1425 in conflicting_actions])
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1426 raise ArgumentError(action, message % conflict_string)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1427
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1428 def _handle_conflict_resolve(self, action, conflicting_actions):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1429
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1430 # remove all conflicting options
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1431 for option_string, action in conflicting_actions:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1432
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1433 # remove the conflicting option
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1434 action.option_strings.remove(option_string)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1435 self._option_string_actions.pop(option_string, None)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1436
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1437 # if the option now has no option string, remove it from the
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1438 # container holding it
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1439 if not action.option_strings:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1440 action.container._remove_action(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1441
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1442
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1443 class _ArgumentGroup(_ActionsContainer):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1444
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1445 def __init__(self, container, title=None, description=None, **kwargs):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1446 # add any missing keyword arguments by checking the container
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1447 update = kwargs.setdefault
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1448 update('conflict_handler', container.conflict_handler)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1449 update('prefix_chars', container.prefix_chars)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1450 update('argument_default', container.argument_default)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1451 super_init = super(_ArgumentGroup, self).__init__
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1452 super_init(description=description, **kwargs)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1453
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1454 # group attributes
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1455 self.title = title
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1456 self._group_actions = []
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1457
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1458 # share most attributes with the container
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1459 self._registries = container._registries
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1460 self._actions = container._actions
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1461 self._option_string_actions = container._option_string_actions
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1462 self._defaults = container._defaults
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1463 self._has_negative_number_optionals = \
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1464 container._has_negative_number_optionals
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1465
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1466 def _add_action(self, action):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1467 action = super(_ArgumentGroup, self)._add_action(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1468 self._group_actions.append(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1469 return action
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1470
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1471 def _remove_action(self, action):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1472 super(_ArgumentGroup, self)._remove_action(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1473 self._group_actions.remove(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1474
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1475
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1476 class _MutuallyExclusiveGroup(_ArgumentGroup):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1477
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1478 def __init__(self, container, required=False):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1479 super(_MutuallyExclusiveGroup, self).__init__(container)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1480 self.required = required
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1481 self._container = container
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1482
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1483 def _add_action(self, action):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1484 if action.required:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1485 msg = _('mutually exclusive arguments must be optional')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1486 raise ValueError(msg)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1487 action = self._container._add_action(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1488 self._group_actions.append(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1489 return action
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1490
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1491 def _remove_action(self, action):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1492 self._container._remove_action(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1493 self._group_actions.remove(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1494
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1495
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1496 class ArgumentParser(_AttributeHolder, _ActionsContainer):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1497 """Object for parsing command line strings into Python objects.
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1498
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1499 Keyword Arguments:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1500 - prog -- The name of the program (default: sys.argv[0])
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1501 - usage -- A usage message (default: auto-generated from arguments)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1502 - description -- A description of what the program does
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1503 - epilog -- Text following the argument descriptions
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1504 - parents -- Parsers whose arguments should be copied into this one
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1505 - formatter_class -- HelpFormatter class for printing help messages
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1506 - prefix_chars -- Characters that prefix optional arguments
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1507 - fromfile_prefix_chars -- Characters that prefix files containing
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1508 additional arguments
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1509 - argument_default -- The default value for all arguments
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1510 - conflict_handler -- String indicating how to handle conflicts
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1511 - add_help -- Add a -h/-help option
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1512 """
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1513
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1514 def __init__(self,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1515 prog=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1516 usage=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1517 description=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1518 epilog=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1519 version=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1520 parents=[],
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1521 formatter_class=HelpFormatter,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1522 prefix_chars='-',
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1523 fromfile_prefix_chars=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1524 argument_default=None,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1525 conflict_handler='error',
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1526 add_help=True):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1527
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1528 if version is not None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1529 import warnings
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1530 warnings.warn(
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1531 """The "version" argument to ArgumentParser is deprecated. """
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1532 """Please use """
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1533 """"add_argument(..., action='version', version="N", ...)" """
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1534 """instead""", DeprecationWarning)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1535
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1536 superinit = super(ArgumentParser, self).__init__
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1537 superinit(description=description,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1538 prefix_chars=prefix_chars,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1539 argument_default=argument_default,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1540 conflict_handler=conflict_handler)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1541
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1542 # default setting for prog
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1543 if prog is None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1544 prog = _os.path.basename(_sys.argv[0])
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1545
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1546 self.prog = prog
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1547 self.usage = usage
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1548 self.epilog = epilog
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1549 self.version = version
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1550 self.formatter_class = formatter_class
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1551 self.fromfile_prefix_chars = fromfile_prefix_chars
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1552 self.add_help = add_help
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1553
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1554 add_group = self.add_argument_group
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1555 self._positionals = add_group(_('positional arguments'))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1556 self._optionals = add_group(_('optional arguments'))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1557 self._subparsers = None
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1558
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1559 # register types
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1560 def identity(string):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1561 return string
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1562 self.register('type', None, identity)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1563
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1564 # add help and version arguments if necessary
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1565 # (using explicit default to override global argument_default)
63691
23c089dc5cff Merged revisions 83675 via svnmerge from
R. David Murray <rdmurray@bitdance.com>
parents: 61879
diff changeset
1566 default_prefix = '-' if '-' in prefix_chars else prefix_chars[0]
59267
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1567 if self.add_help:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1568 self.add_argument(
63691
23c089dc5cff Merged revisions 83675 via svnmerge from
R. David Murray <rdmurray@bitdance.com>
parents: 61879
diff changeset
1569 default_prefix+'h', default_prefix*2+'help',
23c089dc5cff Merged revisions 83675 via svnmerge from
R. David Murray <rdmurray@bitdance.com>
parents: 61879
diff changeset
1570 action='help', default=SUPPRESS,
59267
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1571 help=_('show this help message and exit'))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1572 if self.version:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1573 self.add_argument(
63691
23c089dc5cff Merged revisions 83675 via svnmerge from
R. David Murray <rdmurray@bitdance.com>
parents: 61879
diff changeset
1574 default_prefix+'v', default_prefix*2+'version',
23c089dc5cff Merged revisions 83675 via svnmerge from
R. David Murray <rdmurray@bitdance.com>
parents: 61879
diff changeset
1575 action='version', default=SUPPRESS,
59267
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1576 version=self.version,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1577 help=_("show program's version number and exit"))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1578
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1579 # add parent arguments and defaults
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1580 for parent in parents:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1581 self._add_container_actions(parent)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1582 try:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1583 defaults = parent._defaults
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1584 except AttributeError:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1585 pass
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1586 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1587 self._defaults.update(defaults)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1588
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1589 # =======================
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1590 # Pretty __repr__ methods
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1591 # =======================
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1592 def _get_kwargs(self):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1593 names = [
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1594 'prog',
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1595 'usage',
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1596 'description',
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1597 'version',
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1598 'formatter_class',
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1599 'conflict_handler',
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1600 'add_help',
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1601 ]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1602 return [(name, getattr(self, name)) for name in names]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1603
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1604 # ==================================
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1605 # Optional/Positional adding methods
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1606 # ==================================
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1607 def add_subparsers(self, **kwargs):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1608 if self._subparsers is not None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1609 self.error(_('cannot have multiple subparser arguments'))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1610
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1611 # add the parser class to the arguments if it's not present
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1612 kwargs.setdefault('parser_class', type(self))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1613
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1614 if 'title' in kwargs or 'description' in kwargs:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1615 title = _(kwargs.pop('title', 'subcommands'))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1616 description = _(kwargs.pop('description', None))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1617 self._subparsers = self.add_argument_group(title, description)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1618 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1619 self._subparsers = self._positionals
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1620
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1621 # prog defaults to the usage message of this parser, skipping
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1622 # optional arguments and with no "usage:" prefix
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1623 if kwargs.get('prog') is None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1624 formatter = self._get_formatter()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1625 positionals = self._get_positional_actions()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1626 groups = self._mutually_exclusive_groups
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1627 formatter.add_usage(self.usage, positionals, groups, '')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1628 kwargs['prog'] = formatter.format_help().strip()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1629
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1630 # create the parsers action and add it to the positionals list
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1631 parsers_class = self._pop_action_class(kwargs, 'parsers')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1632 action = parsers_class(option_strings=[], **kwargs)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1633 self._subparsers._add_action(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1634
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1635 # return the created parsers action
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1636 return action
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1637
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1638 def _add_action(self, action):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1639 if action.option_strings:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1640 self._optionals._add_action(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1641 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1642 self._positionals._add_action(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1643 return action
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1644
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1645 def _get_optional_actions(self):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1646 return [action
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1647 for action in self._actions
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1648 if action.option_strings]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1649
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1650 def _get_positional_actions(self):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1651 return [action
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1652 for action in self._actions
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1653 if not action.option_strings]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1654
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1655 # =====================================
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1656 # Command line argument parsing methods
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1657 # =====================================
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1658 def parse_args(self, args=None, namespace=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1659 args, argv = self.parse_known_args(args, namespace)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1660 if argv:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1661 msg = _('unrecognized arguments: %s')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1662 self.error(msg % ' '.join(argv))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1663 return args
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1664
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1665 def parse_known_args(self, args=None, namespace=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1666 # args default to the system args
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1667 if args is None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1668 args = _sys.argv[1:]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1669
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1670 # default Namespace built from parser defaults
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1671 if namespace is None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1672 namespace = Namespace()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1673
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1674 # add any action defaults that aren't present
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1675 for action in self._actions:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1676 if action.dest is not SUPPRESS:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1677 if not hasattr(namespace, action.dest):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1678 if action.default is not SUPPRESS:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1679 default = action.default
59281
eba942e77895 remove cross-version compatibility code
Benjamin Peterson <benjamin@python.org>
parents: 59280
diff changeset
1680 if isinstance(action.default, basestring):
59267
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1681 default = self._get_value(action, default)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1682 setattr(namespace, action.dest, default)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1683
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1684 # add any parser defaults that aren't present
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1685 for dest in self._defaults:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1686 if not hasattr(namespace, dest):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1687 setattr(namespace, dest, self._defaults[dest])
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1688
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1689 # parse the arguments and exit if there are any errors
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1690 try:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1691 return self._parse_known_args(args, namespace)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1692 except ArgumentError:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1693 err = _sys.exc_info()[1]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1694 self.error(str(err))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1695
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1696 def _parse_known_args(self, arg_strings, namespace):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1697 # replace arg strings that are file references
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1698 if self.fromfile_prefix_chars is not None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1699 arg_strings = self._read_args_from_files(arg_strings)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1700
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1701 # map all mutually exclusive arguments to the other arguments
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1702 # they can't occur with
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1703 action_conflicts = {}
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1704 for mutex_group in self._mutually_exclusive_groups:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1705 group_actions = mutex_group._group_actions
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1706 for i, mutex_action in enumerate(mutex_group._group_actions):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1707 conflicts = action_conflicts.setdefault(mutex_action, [])
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1708 conflicts.extend(group_actions[:i])
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1709 conflicts.extend(group_actions[i + 1:])
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1710
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1711 # find all option indices, and determine the arg_string_pattern
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1712 # which has an 'O' if there is an option at an index,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1713 # an 'A' if there is an argument, or a '-' if there is a '--'
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1714 option_string_indices = {}
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1715 arg_string_pattern_parts = []
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1716 arg_strings_iter = iter(arg_strings)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1717 for i, arg_string in enumerate(arg_strings_iter):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1718
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1719 # all args after -- are non-options
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1720 if arg_string == '--':
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1721 arg_string_pattern_parts.append('-')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1722 for arg_string in arg_strings_iter:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1723 arg_string_pattern_parts.append('A')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1724
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1725 # otherwise, add the arg to the arg strings
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1726 # and note the index if it was an option
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1727 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1728 option_tuple = self._parse_optional(arg_string)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1729 if option_tuple is None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1730 pattern = 'A'
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1731 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1732 option_string_indices[i] = option_tuple
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1733 pattern = 'O'
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1734 arg_string_pattern_parts.append(pattern)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1735
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1736 # join the pieces together to form the pattern
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1737 arg_strings_pattern = ''.join(arg_string_pattern_parts)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1738
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1739 # converts arg strings to the appropriate and then takes the action
59281
eba942e77895 remove cross-version compatibility code
Benjamin Peterson <benjamin@python.org>
parents: 59280
diff changeset
1740 seen_actions = set()
eba942e77895 remove cross-version compatibility code
Benjamin Peterson <benjamin@python.org>
parents: 59280
diff changeset
1741 seen_non_default_actions = set()
59267
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1742
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1743 def take_action(action, argument_strings, option_string=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1744 seen_actions.add(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1745 argument_values = self._get_values(action, argument_strings)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1746
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1747 # error if this argument is not allowed with other previously
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1748 # seen arguments, assuming that actions that use the default
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1749 # value don't really count as "present"
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1750 if argument_values is not action.default:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1751 seen_non_default_actions.add(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1752 for conflict_action in action_conflicts.get(action, []):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1753 if conflict_action in seen_non_default_actions:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1754 msg = _('not allowed with argument %s')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1755 action_name = _get_action_name(conflict_action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1756 raise ArgumentError(action, msg % action_name)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1757
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1758 # take the action if we didn't receive a SUPPRESS value
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1759 # (e.g. from a default)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1760 if argument_values is not SUPPRESS:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1761 action(self, namespace, argument_values, option_string)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1762
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1763 # function to convert arg_strings into an optional action
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1764 def consume_optional(start_index):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1765
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1766 # get the optional identified at this index
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1767 option_tuple = option_string_indices[start_index]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1768 action, option_string, explicit_arg = option_tuple
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1769
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1770 # identify additional optionals in the same arg string
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1771 # (e.g. -xyz is the same as -x -y -z if no args are required)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1772 match_argument = self._match_argument
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1773 action_tuples = []
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1774 while True:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1775
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1776 # if we found no optional action, skip it
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1777 if action is None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1778 extras.append(arg_strings[start_index])
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1779 return start_index + 1
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1780
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1781 # if there is an explicit argument, try to match the
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1782 # optional's string arguments to only this
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1783 if explicit_arg is not None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1784 arg_count = match_argument(action, 'A')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1785
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1786 # if the action is a single-dash option and takes no
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1787 # arguments, try to parse more single-dash options out
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1788 # of the tail of the option string
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1789 chars = self.prefix_chars
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1790 if arg_count == 0 and option_string[1] not in chars:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1791 action_tuples.append((action, [], option_string))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1792 for char in self.prefix_chars:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1793 option_string = char + explicit_arg[0]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1794 explicit_arg = explicit_arg[1:] or None
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1795 optionals_map = self._option_string_actions
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1796 if option_string in optionals_map:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1797 action = optionals_map[option_string]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1798 break
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1799 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1800 msg = _('ignored explicit argument %r')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1801 raise ArgumentError(action, msg % explicit_arg)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1802
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1803 # if the action expect exactly one argument, we've
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1804 # successfully matched the option; exit the loop
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1805 elif arg_count == 1:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1806 stop = start_index + 1
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1807 args = [explicit_arg]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1808 action_tuples.append((action, args, option_string))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1809 break
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1810
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1811 # error if a double-dash option did not use the
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1812 # explicit argument
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1813 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1814 msg = _('ignored explicit argument %r')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1815 raise ArgumentError(action, msg % explicit_arg)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1816
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1817 # if there is no explicit argument, try to match the
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1818 # optional's string arguments with the following strings
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1819 # if successful, exit the loop
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1820 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1821 start = start_index + 1
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1822 selected_patterns = arg_strings_pattern[start:]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1823 arg_count = match_argument(action, selected_patterns)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1824 stop = start + arg_count
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1825 args = arg_strings[start:stop]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1826 action_tuples.append((action, args, option_string))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1827 break
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1828
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1829 # add the Optional to the list and return the index at which
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1830 # the Optional's string args stopped
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1831 assert action_tuples
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1832 for action, args, option_string in action_tuples:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1833 take_action(action, args, option_string)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1834 return stop
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1835
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1836 # the list of Positionals left to be parsed; this is modified
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1837 # by consume_positionals()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1838 positionals = self._get_positional_actions()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1839
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1840 # function to convert arg_strings into positional actions
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1841 def consume_positionals(start_index):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1842 # match as many Positionals as possible
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1843 match_partial = self._match_arguments_partial
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1844 selected_pattern = arg_strings_pattern[start_index:]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1845 arg_counts = match_partial(positionals, selected_pattern)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1846
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1847 # slice off the appropriate arg strings for each Positional
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1848 # and add the Positional and its args to the list
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1849 for action, arg_count in zip(positionals, arg_counts):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1850 args = arg_strings[start_index: start_index + arg_count]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1851 start_index += arg_count
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1852 take_action(action, args)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1853
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1854 # slice off the Positionals that we just parsed and return the
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1855 # index at which the Positionals' string args stopped
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1856 positionals[:] = positionals[len(arg_counts):]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1857 return start_index
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1858
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1859 # consume Positionals and Optionals alternately, until we have
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1860 # passed the last option string
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1861 extras = []
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1862 start_index = 0
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1863 if option_string_indices:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1864 max_option_string_index = max(option_string_indices)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1865 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1866 max_option_string_index = -1
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1867 while start_index <= max_option_string_index:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1868
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1869 # consume any Positionals preceding the next option
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1870 next_option_string_index = min([
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1871 index
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1872 for index in option_string_indices
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1873 if index >= start_index])
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1874 if start_index != next_option_string_index:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1875 positionals_end_index = consume_positionals(start_index)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1876
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1877 # only try to parse the next optional if we didn't consume
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1878 # the option string during the positionals parsing
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1879 if positionals_end_index > start_index:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1880 start_index = positionals_end_index
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1881 continue
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1882 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1883 start_index = positionals_end_index
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1884
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1885 # if we consumed all the positionals we could and we're not
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1886 # at the index of an option string, there were extra arguments
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1887 if start_index not in option_string_indices:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1888 strings = arg_strings[start_index:next_option_string_index]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1889 extras.extend(strings)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1890 start_index = next_option_string_index
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1891
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1892 # consume the next optional and any arguments for it
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1893 start_index = consume_optional(start_index)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1894
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1895 # consume any positionals following the last Optional
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1896 stop_index = consume_positionals(start_index)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1897
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1898 # if we didn't consume all the argument strings, there were extras
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1899 extras.extend(arg_strings[stop_index:])
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1900
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1901 # if we didn't use all the Positional objects, there were too few
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1902 # arg strings supplied.
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1903 if positionals:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1904 self.error(_('too few arguments'))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1905
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1906 # make sure all required actions were present
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1907 for action in self._actions:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1908 if action.required:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1909 if action not in seen_actions:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1910 name = _get_action_name(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1911 self.error(_('argument %s is required') % name)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1912
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1913 # make sure all required groups had one option present
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1914 for group in self._mutually_exclusive_groups:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1915 if group.required:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1916 for action in group._group_actions:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1917 if action in seen_non_default_actions:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1918 break
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1919
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1920 # if no actions were used, report the error
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1921 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1922 names = [_get_action_name(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1923 for action in group._group_actions
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1924 if action.help is not SUPPRESS]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1925 msg = _('one of the arguments %s is required')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1926 self.error(msg % ' '.join(names))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1927
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1928 # return the updated namespace and the extra arguments
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1929 return namespace, extras
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1930
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1931 def _read_args_from_files(self, arg_strings):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1932 # expand arguments referencing files
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1933 new_arg_strings = []
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1934 for arg_string in arg_strings:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1935
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1936 # for regular arguments, just add them back into the list
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1937 if arg_string[0] not in self.fromfile_prefix_chars:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1938 new_arg_strings.append(arg_string)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1939
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1940 # replace arguments referencing files with the file content
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1941 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1942 try:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1943 args_file = open(arg_string[1:])
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1944 try:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1945 arg_strings = []
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1946 for arg_line in args_file.read().splitlines():
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1947 for arg in self.convert_arg_line_to_args(arg_line):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1948 arg_strings.append(arg)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1949 arg_strings = self._read_args_from_files(arg_strings)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1950 new_arg_strings.extend(arg_strings)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1951 finally:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1952 args_file.close()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1953 except IOError:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1954 err = _sys.exc_info()[1]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1955 self.error(str(err))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1956
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1957 # return the modified argument list
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1958 return new_arg_strings
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1959
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1960 def convert_arg_line_to_args(self, arg_line):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1961 return [arg_line]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1962
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1963 def _match_argument(self, action, arg_strings_pattern):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1964 # match the pattern for this action to the arg strings
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1965 nargs_pattern = self._get_nargs_pattern(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1966 match = _re.match(nargs_pattern, arg_strings_pattern)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1967
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1968 # raise an exception if we weren't able to find a match
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1969 if match is None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1970 nargs_errors = {
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1971 None: _('expected one argument'),
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1972 OPTIONAL: _('expected at most one argument'),
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1973 ONE_OR_MORE: _('expected at least one argument'),
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1974 }
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1975 default = _('expected %s argument(s)') % action.nargs
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1976 msg = nargs_errors.get(action.nargs, default)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1977 raise ArgumentError(action, msg)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1978
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1979 # return the number of arguments matched
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1980 return len(match.group(1))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1981
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1982 def _match_arguments_partial(self, actions, arg_strings_pattern):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1983 # progressively shorten the actions list by slicing off the
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1984 # final actions until we find a match
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1985 result = []
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1986 for i in range(len(actions), 0, -1):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1987 actions_slice = actions[:i]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1988 pattern = ''.join([self._get_nargs_pattern(action)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1989 for action in actions_slice])
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1990 match = _re.match(pattern, arg_strings_pattern)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1991 if match is not None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1992 result.extend([len(string) for string in match.groups()])
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1993 break
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1994
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1995 # return the list of arg string counts
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1996 return result
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1997
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1998 def _parse_optional(self, arg_string):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
1999 # if it's an empty string, it was meant to be a positional
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2000 if not arg_string:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2001 return None
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2002
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2003 # if it doesn't start with a prefix, it was meant to be positional
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2004 if not arg_string[0] in self.prefix_chars:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2005 return None
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2006
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2007 # if the option string is present in the parser, return the action
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2008 if arg_string in self._option_string_actions:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2009 action = self._option_string_actions[arg_string]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2010 return action, arg_string, None
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2011
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2012 # if it's just a single character, it was meant to be positional
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2013 if len(arg_string) == 1:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2014 return None
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2015
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2016 # if the option string before the "=" is present, return the action
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2017 if '=' in arg_string:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2018 option_string, explicit_arg = arg_string.split('=', 1)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2019 if option_string in self._option_string_actions:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2020 action = self._option_string_actions[option_string]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2021 return action, option_string, explicit_arg
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2022
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2023 # search through all possible prefixes of the option string
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2024 # and all actions in the parser for possible interpretations
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2025 option_tuples = self._get_option_tuples(arg_string)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2026
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2027 # if multiple actions match, the option string was ambiguous
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2028 if len(option_tuples) > 1:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2029 options = ', '.join([option_string
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2030 for action, option_string, explicit_arg in option_tuples])
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2031 tup = arg_string, options
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2032 self.error(_('ambiguous option: %s could match %s') % tup)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2033
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2034 # if exactly one action matched, this segmentation is good,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2035 # so return the parsed action
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2036 elif len(option_tuples) == 1:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2037 option_tuple, = option_tuples
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2038 return option_tuple
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2039
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2040 # if it was not found as an option, but it looks like a negative
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2041 # number, it was meant to be positional
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2042 # unless there are negative-number-like options
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2043 if self._negative_number_matcher.match(arg_string):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2044 if not self._has_negative_number_optionals:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2045 return None
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2046
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2047 # if it contains a space, it was meant to be a positional
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2048 if ' ' in arg_string:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2049 return None
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2050
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2051 # it was meant to be an optional but there is no such option
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2052 # in this parser (though it might be a valid option in a subparser)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2053 return None, arg_string, None
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2054
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2055 def _get_option_tuples(self, option_string):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2056 result = []
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2057
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2058 # option strings starting with two prefix characters are only
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2059 # split at the '='
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2060 chars = self.prefix_chars
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2061 if option_string[0] in chars and option_string[1] in chars:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2062 if '=' in option_string:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2063 option_prefix, explicit_arg = option_string.split('=', 1)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2064 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2065 option_prefix = option_string
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2066 explicit_arg = None
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2067 for option_string in self._option_string_actions:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2068 if option_string.startswith(option_prefix):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2069 action = self._option_string_actions[option_string]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2070 tup = action, option_string, explicit_arg
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2071 result.append(tup)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2072
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2073 # single character options can be concatenated with their arguments
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2074 # but multiple character options always have to have their argument
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2075 # separate
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2076 elif option_string[0] in chars and option_string[1] not in chars:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2077 option_prefix = option_string
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2078 explicit_arg = None
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2079 short_option_prefix = option_string[:2]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2080 short_explicit_arg = option_string[2:]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2081
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2082 for option_string in self._option_string_actions:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2083 if option_string == short_option_prefix:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2084 action = self._option_string_actions[option_string]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2085 tup = action, option_string, short_explicit_arg
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2086 result.append(tup)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2087 elif option_string.startswith(option_prefix):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2088 action = self._option_string_actions[option_string]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2089 tup = action, option_string, explicit_arg
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2090 result.append(tup)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2091
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2092 # shouldn't ever get here
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2093 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2094 self.error(_('unexpected option string: %s') % option_string)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2095
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2096 # return the collected option tuples
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2097 return result
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2098
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2099 def _get_nargs_pattern(self, action):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2100 # in all examples below, we have to allow for '--' args
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2101 # which are represented as '-' in the pattern
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2102 nargs = action.nargs
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2103
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2104 # the default (None) is assumed to be a single argument
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2105 if nargs is None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2106 nargs_pattern = '(-*A-*)'
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2107
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2108 # allow zero or one arguments
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2109 elif nargs == OPTIONAL:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2110 nargs_pattern = '(-*A?-*)'
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2111
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2112 # allow zero or more arguments
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2113 elif nargs == ZERO_OR_MORE:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2114 nargs_pattern = '(-*[A-]*)'
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2115
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2116 # allow one or more arguments
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2117 elif nargs == ONE_OR_MORE:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2118 nargs_pattern = '(-*A[A-]*)'
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2119
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2120 # allow any number of options or arguments
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2121 elif nargs == REMAINDER:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2122 nargs_pattern = '([-AO]*)'
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2123
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2124 # allow one argument followed by any number of options or arguments
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2125 elif nargs == PARSER:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2126 nargs_pattern = '(-*A[-AO]*)'
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2127
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2128 # all others should be integers
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2129 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2130 nargs_pattern = '(-*%s-*)' % '-*'.join('A' * nargs)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2131
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2132 # if this is an optional action, -- is not allowed
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2133 if action.option_strings:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2134 nargs_pattern = nargs_pattern.replace('-*', '')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2135 nargs_pattern = nargs_pattern.replace('-', '')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2136
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2137 # return the pattern
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2138 return nargs_pattern
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2139
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2140 # ========================
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2141 # Value conversion methods
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2142 # ========================
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2143 def _get_values(self, action, arg_strings):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2144 # for everything but PARSER args, strip out '--'
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2145 if action.nargs not in [PARSER, REMAINDER]:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2146 arg_strings = [s for s in arg_strings if s != '--']
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2147
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2148 # optional argument produces a default when not present
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2149 if not arg_strings and action.nargs == OPTIONAL:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2150 if action.option_strings:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2151 value = action.const
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2152 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2153 value = action.default
59281
eba942e77895 remove cross-version compatibility code
Benjamin Peterson <benjamin@python.org>
parents: 59280
diff changeset
2154 if isinstance(value, basestring):
59267
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2155 value = self._get_value(action, value)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2156 self._check_value(action, value)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2157
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2158 # when nargs='*' on a positional, if there were no command-line
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2159 # args, use the default if it is anything other than None
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2160 elif (not arg_strings and action.nargs == ZERO_OR_MORE and
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2161 not action.option_strings):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2162 if action.default is not None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2163 value = action.default
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2164 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2165 value = arg_strings
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2166 self._check_value(action, value)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2167
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2168 # single argument or optional argument produces a single value
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2169 elif len(arg_strings) == 1 and action.nargs in [None, OPTIONAL]:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2170 arg_string, = arg_strings
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2171 value = self._get_value(action, arg_string)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2172 self._check_value(action, value)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2173
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2174 # REMAINDER arguments convert all values, checking none
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2175 elif action.nargs == REMAINDER:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2176 value = [self._get_value(action, v) for v in arg_strings]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2177
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2178 # PARSER arguments convert all values, but check only the first
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2179 elif action.nargs == PARSER:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2180 value = [self._get_value(action, v) for v in arg_strings]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2181 self._check_value(action, value[0])
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2182
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2183 # all other types of nargs produce a list
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2184 else:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2185 value = [self._get_value(action, v) for v in arg_strings]
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2186 for v in value:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2187 self._check_value(action, v)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2188
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2189 # return the converted value
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2190 return value
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2191
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2192 def _get_value(self, action, arg_string):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2193 type_func = self._registry_get('type', action.type, action.type)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2194 if not _callable(type_func):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2195 msg = _('%r is not callable')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2196 raise ArgumentError(action, msg % type_func)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2197
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2198 # convert the value to the appropriate type
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2199 try:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2200 result = type_func(arg_string)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2201
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2202 # ArgumentTypeErrors indicate errors
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2203 except ArgumentTypeError:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2204 name = getattr(action.type, '__name__', repr(action.type))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2205 msg = str(_sys.exc_info()[1])
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2206 raise ArgumentError(action, msg)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2207
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2208 # TypeErrors or ValueErrors also indicate errors
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2209 except (TypeError, ValueError):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2210 name = getattr(action.type, '__name__', repr(action.type))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2211 msg = _('invalid %s value: %r')
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2212 raise ArgumentError(action, msg % (name, arg_string))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2213
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2214 # return the converted value
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2215 return result
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2216
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2217 def _check_value(self, action, value):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2218 # converted value must be one of the choices (if specified)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2219 if action.choices is not None and value not in action.choices:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2220 tup = value, ', '.join(map(repr, action.choices))
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2221 msg = _('invalid choice: %r (choose from %s)') % tup
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2222 raise ArgumentError(action, msg)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2223
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2224 # =======================
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2225 # Help-formatting methods
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2226 # =======================
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2227 def format_usage(self):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2228 formatter = self._get_formatter()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2229 formatter.add_usage(self.usage, self._actions,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2230 self._mutually_exclusive_groups)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2231 return formatter.format_help()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2232
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2233 def format_help(self):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2234 formatter = self._get_formatter()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2235
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2236 # usage
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2237 formatter.add_usage(self.usage, self._actions,
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2238 self._mutually_exclusive_groups)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2239
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2240 # description
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2241 formatter.add_text(self.description)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2242
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2243 # positionals, optionals and user-defined groups
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2244 for action_group in self._action_groups:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2245 formatter.start_section(action_group.title)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2246 formatter.add_text(action_group.description)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2247 formatter.add_arguments(action_group._group_actions)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2248 formatter.end_section()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2249
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2250 # epilog
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2251 formatter.add_text(self.epilog)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2252
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2253 # determine help from format above
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2254 return formatter.format_help()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2255
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2256 def format_version(self):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2257 import warnings
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2258 warnings.warn(
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2259 'The format_version method is deprecated -- the "version" '
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2260 'argument to ArgumentParser is no longer supported.',
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2261 DeprecationWarning)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2262 formatter = self._get_formatter()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2263 formatter.add_text(self.version)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2264 return formatter.format_help()
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2265
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2266 def _get_formatter(self):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2267 return self.formatter_class(prog=self.prog)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2268
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2269 # =====================
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2270 # Help-printing methods
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2271 # =====================
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2272 def print_usage(self, file=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2273 if file is None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2274 file = _sys.stdout
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2275 self._print_message(self.format_usage(), file)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2276
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2277 def print_help(self, file=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2278 if file is None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2279 file = _sys.stdout
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2280 self._print_message(self.format_help(), file)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2281
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2282 def print_version(self, file=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2283 import warnings
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2284 warnings.warn(
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2285 'The print_version method is deprecated -- the "version" '
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2286 'argument to ArgumentParser is no longer supported.',
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2287 DeprecationWarning)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2288 self._print_message(self.format_version(), file)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2289
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2290 def _print_message(self, message, file=None):
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2291 if message:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2292 if file is None:
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2293 file = _sys.stderr
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2294 file.write(message)
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2295
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2296 # ===============
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2297 # Exiting methods
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2298 # ===============
4ca83c5b8551 set svn:eol-style
Benjamin Peterson <benjamin@python.org>
parents: 59266
diff changeset
2299 def exit(self, status=0, message=None):
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2300 if message:
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2301 self._print_message(message, _sys.stderr)
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2302 _sys.exit(status)
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2303
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2304 def error(self, message):
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2305 """error(message: string)
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2306
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2307 Prints a usage message incorporating the message to stderr and
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2308 exits.
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2309
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2310 If you override this in a subclass, it should not return -- it
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2311 should either exit or raise an exception.
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2312 """
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2313 self.print_usage(_sys.stderr)
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2314 self.exit(2, _('%s: error: %s\n') % (self.prog, message))