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annotate Lib/distutils/core.py @ 79691:05c8928362ee

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Merge __next__ method link fixes with 3.3.
author Ezio Melotti <ezio.melotti@gmail.com>
date Fri, 12 Oct 2012 13:46:37 +0300
parents 3e26c9033306
children 47f98a550d42
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 """distutils.core
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2
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3 The only module that needs to be imported to use the Distutils; provides
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4 the 'setup' function (which is to be called from the setup script). Also
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5 indirectly provides the Distribution and Command classes, although they are
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6 really defined in distutils.dist and distutils.cmd.
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7 """
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8
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Victor Stinner <victor.stinner@haypocalc.com>
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9 import os
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10 import sys
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11
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12 from distutils.debug import DEBUG
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13 from distutils.errors import *
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14 from distutils.util import grok_environment_error
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15
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16 # Mainly import these so setup scripts can "from distutils.core import" them.
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17 from distutils.dist import Distribution
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18 from distutils.cmd import Command
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Alexandre Vassalotti <alexandre@peadrop.com>
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19 from distutils.config import PyPIRCCommand
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20 from distutils.extension import Extension
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21
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22 # This is a barebones help message generated displayed when the user
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23 # runs the setup script with no arguments at all. More useful help
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24 # is generated with various --help options: global help, list commands,
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25 # and per-command help.
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26 USAGE = """\
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27 usage: %(script)s [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
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28 or: %(script)s --help [cmd1 cmd2 ...]
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29 or: %(script)s --help-commands
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30 or: %(script)s cmd --help
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31 """
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32
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33 def gen_usage (script_name):
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34 script = os.path.basename(script_name)
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35 return USAGE % vars()
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36
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37
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38 # Some mild magic to control the behaviour of 'setup()' from 'run_setup()'.
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39 _setup_stop_after = None
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40 _setup_distribution = None
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41
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42 # Legal keyword arguments for the setup() function
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43 setup_keywords = ('distclass', 'script_name', 'script_args', 'options',
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44 'name', 'version', 'author', 'author_email',
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45 'maintainer', 'maintainer_email', 'url', 'license',
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46 'description', 'long_description', 'keywords',
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47 'platforms', 'classifiers', 'download_url',
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48 'requires', 'provides', 'obsoletes',
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49 )
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50
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51 # Legal keyword arguments for the Extension constructor
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52 extension_keywords = ('name', 'sources', 'include_dirs',
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53 'define_macros', 'undef_macros',
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54 'library_dirs', 'libraries', 'runtime_library_dirs',
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55 'extra_objects', 'extra_compile_args', 'extra_link_args',
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56 'swig_opts', 'export_symbols', 'depends', 'language')
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57
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58 def setup (**attrs):
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59 """The gateway to the Distutils: do everything your setup script needs
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60 to do, in a highly flexible and user-driven way. Briefly: create a
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61 Distribution instance; find and parse config files; parse the command
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62 line; run each Distutils command found there, customized by the options
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63 supplied to 'setup()' (as keyword arguments), in config files, and on
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64 the command line.
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65
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66 The Distribution instance might be an instance of a class supplied via
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67 the 'distclass' keyword argument to 'setup'; if no such class is
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68 supplied, then the Distribution class (in dist.py) is instantiated.
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69 All other arguments to 'setup' (except for 'cmdclass') are used to set
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70 attributes of the Distribution instance.
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71
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72 The 'cmdclass' argument, if supplied, is a dictionary mapping command
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73 names to command classes. Each command encountered on the command line
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74 will be turned into a command class, which is in turn instantiated; any
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75 class found in 'cmdclass' is used in place of the default, which is
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76 (for command 'foo_bar') class 'foo_bar' in module
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77 'distutils.command.foo_bar'. The command class must provide a
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78 'user_options' attribute which is a list of option specifiers for
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79 'distutils.fancy_getopt'. Any command-line options between the current
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80 and the next command are used to set attributes of the current command
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81 object.
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82
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83 When the entire command-line has been successfully parsed, calls the
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84 'run()' method on each command object in turn. This method will be
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85 driven entirely by the Distribution object (which each command object
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86 has a reference to, thanks to its constructor), and the
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87 command-specific options that became attributes of each command
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88 object.
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89 """
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90
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91 global _setup_stop_after, _setup_distribution
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92
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93 # Determine the distribution class -- either caller-supplied or
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94 # our Distribution (see below).
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95 klass = attrs.get('distclass')
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96 if klass:
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97 del attrs['distclass']
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98 else:
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99 klass = Distribution
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100
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101 if 'script_name' not in attrs:
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102 attrs['script_name'] = os.path.basename(sys.argv[0])
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103 if 'script_args' not in attrs:
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104 attrs['script_args'] = sys.argv[1:]
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105
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106 # Create the Distribution instance, using the remaining arguments
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107 # (ie. everything except distclass) to initialize it
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108 try:
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109 _setup_distribution = dist = klass(attrs)
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110 except DistutilsSetupError as msg:
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111 if 'name' not in attrs:
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112 raise SystemExit("error in setup command: %s" % msg)
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113 else:
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114 raise SystemExit("error in %s setup command: %s" % \
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115 (attrs['name'], msg))
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116
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117 if _setup_stop_after == "init":
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118 return dist
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119
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120 # Find and parse the config file(s): they will override options from
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121 # the setup script, but be overridden by the command line.
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122 dist.parse_config_files()
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123
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124 if DEBUG:
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125 print("options (after parsing config files):")
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126 dist.dump_option_dicts()
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127
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128 if _setup_stop_after == "config":
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129 return dist
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130
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131 # Parse the command line; any command-line errors are the end user's
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132 # fault, so turn them into SystemExit to suppress tracebacks.
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133 try:
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134 ok = dist.parse_command_line()
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135 except DistutilsArgError as msg:
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136 raise SystemExit(gen_usage(dist.script_name) + "\nerror: %s" % msg)
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137
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138 if DEBUG:
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139 print("options (after parsing command line):")
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140 dist.dump_option_dicts()
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141
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142 if _setup_stop_after == "commandline":
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143 return dist
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144
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145 # And finally, run all the commands found on the command line.
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146 if ok:
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147 try:
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148 dist.run_commands()
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149 except KeyboardInterrupt:
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150 raise SystemExit("interrupted")
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151 except (IOError, os.error) as exc:
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152 error = grok_environment_error(exc)
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153
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154 if DEBUG:
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155 sys.stderr.write(error + "\n")
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156 raise
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157 else:
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158 raise SystemExit(error)
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159
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160 except (DistutilsError,
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161 CCompilerError) as msg:
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162 if DEBUG:
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163 raise
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164 else:
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165 raise SystemExit("error: " + str(msg))
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166
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167 return dist
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168
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169 # setup ()
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170
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171
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172 def run_setup (script_name, script_args=None, stop_after="run"):
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173 """Run a setup script in a somewhat controlled environment, and
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174 return the Distribution instance that drives things. This is useful
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175 if you need to find out the distribution meta-data (passed as
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176 keyword args from 'script' to 'setup()', or the contents of the
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177 config files or command-line.
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178
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179 'script_name' is a file that will be read and run with 'exec()';
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180 'sys.argv[0]' will be replaced with 'script' for the duration of the
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181 call. 'script_args' is a list of strings; if supplied,
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182 'sys.argv[1:]' will be replaced by 'script_args' for the duration of
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183 the call.
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184
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185 'stop_after' tells 'setup()' when to stop processing; possible
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186 values:
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187 init
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188 stop after the Distribution instance has been created and
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189 populated with the keyword arguments to 'setup()'
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190 config
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191 stop after config files have been parsed (and their data
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192 stored in the Distribution instance)
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193 commandline
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194 stop after the command-line ('sys.argv[1:]' or 'script_args')
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195 have been parsed (and the data stored in the Distribution)
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196 run [default]
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197 stop after all commands have been run (the same as if 'setup()'
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198 had been called in the usual way
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199
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200 Returns the Distribution instance, which provides all information
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201 used to drive the Distutils.
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202 """
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203 if stop_after not in ('init', 'config', 'commandline', 'run'):
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204 raise ValueError("invalid value for 'stop_after': %r" % (stop_after,))
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205
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206 global _setup_stop_after, _setup_distribution
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207 _setup_stop_after = stop_after
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208
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209 save_argv = sys.argv
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210 g = {'__file__': script_name}
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211 l = {}
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212 try:
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213 try:
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214 sys.argv[0] = script_name
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215 if script_args is not None:
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216 sys.argv[1:] = script_args
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217 with open(script_name, 'rb') as f:
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218 exec(f.read(), g, l)
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219 finally:
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220 sys.argv = save_argv
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221 _setup_stop_after = None
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222 except SystemExit:
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223 # Hmm, should we do something if exiting with a non-zero code
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224 # (ie. error)?
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225 pass
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226 except:
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227 raise
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228
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229 if _setup_distribution is None:
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230 raise RuntimeError(("'distutils.core.setup()' was never called -- "
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231 "perhaps '%s' is not a Distutils setup script?") % \
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232 script_name)
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233
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234 # I wonder if the setup script's namespace -- g and l -- would be of
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235 # any interest to callers?
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236 #print "_setup_distribution:", _setup_distribution
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237 return _setup_distribution
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238
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239 # run_setup ()