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annotate Lib/distutils/core.py @ 58925:eecf1bef052d 2.6

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Merged revisions 78207 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r78207 | ezio.melotti | 2010-02-17 01:26:09 +0200 (Wed, 17 Feb 2010) | 1 line #7930: fix stripid ........
author Ezio Melotti <ezio.melotti@gmail.com>
date Tue, 16 Feb 2010 23:29:44 +0000
parents fc90b581516e
children a5229237eb50
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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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9 # This module should be kept compatible with Python 2.1.
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10
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11 __revision__ = "$Id$"
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12
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13 import sys, os
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14 from types import *
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15
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16 from distutils.debug import DEBUG
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17 from distutils.errors import *
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18 from distutils.util import grok_environment_error
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19
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20 # Mainly import these so setup scripts can "from distutils.core import" them.
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21 from distutils.dist import Distribution
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22 from distutils.cmd import Command
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23 from distutils.config import PyPIRCCommand
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24 from distutils.extension import Extension
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25
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26 # This is a barebones help message generated displayed when the user
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27 # runs the setup script with no arguments at all. More useful help
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28 # is generated with various --help options: global help, list commands,
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29 # and per-command help.
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30 USAGE = """\
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31 usage: %(script)s [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
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32 or: %(script)s --help [cmd1 cmd2 ...]
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33 or: %(script)s --help-commands
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34 or: %(script)s cmd --help
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35 """
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36
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37 def gen_usage (script_name):
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38 script = os.path.basename(script_name)
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39 return USAGE % vars()
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40
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41
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42 # Some mild magic to control the behaviour of 'setup()' from 'run_setup()'.
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43 _setup_stop_after = None
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44 _setup_distribution = None
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45
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46 # Legal keyword arguments for the setup() function
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47 setup_keywords = ('distclass', 'script_name', 'script_args', 'options',
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48 'name', 'version', 'author', 'author_email',
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49 'maintainer', 'maintainer_email', 'url', 'license',
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50 'description', 'long_description', 'keywords',
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51 'platforms', 'classifiers', 'download_url',
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52 'requires', 'provides', 'obsoletes',
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53 )
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54
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55 # Legal keyword arguments for the Extension constructor
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56 extension_keywords = ('name', 'sources', 'include_dirs',
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57 'define_macros', 'undef_macros',
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58 'library_dirs', 'libraries', 'runtime_library_dirs',
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59 'extra_objects', 'extra_compile_args', 'extra_link_args',
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60 'swig_opts', 'export_symbols', 'depends', 'language')
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61
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62 def setup (**attrs):
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63 """The gateway to the Distutils: do everything your setup script needs
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64 to do, in a highly flexible and user-driven way. Briefly: create a
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65 Distribution instance; find and parse config files; parse the command
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66 line; run each Distutils command found there, customized by the options
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67 supplied to 'setup()' (as keyword arguments), in config files, and on
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68 the command line.
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69
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70 The Distribution instance might be an instance of a class supplied via
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71 the 'distclass' keyword argument to 'setup'; if no such class is
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72 supplied, then the Distribution class (in dist.py) is instantiated.
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73 All other arguments to 'setup' (except for 'cmdclass') are used to set
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74 attributes of the Distribution instance.
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75
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76 The 'cmdclass' argument, if supplied, is a dictionary mapping command
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77 names to command classes. Each command encountered on the command line
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78 will be turned into a command class, which is in turn instantiated; any
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79 class found in 'cmdclass' is used in place of the default, which is
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80 (for command 'foo_bar') class 'foo_bar' in module
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81 'distutils.command.foo_bar'. The command class must provide a
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82 'user_options' attribute which is a list of option specifiers for
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83 'distutils.fancy_getopt'. Any command-line options between the current
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84 and the next command are used to set attributes of the current command
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85 object.
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86
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87 When the entire command-line has been successfully parsed, calls the
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88 'run()' method on each command object in turn. This method will be
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89 driven entirely by the Distribution object (which each command object
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90 has a reference to, thanks to its constructor), and the
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91 command-specific options that became attributes of each command
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92 object.
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93 """
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94
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95 global _setup_stop_after, _setup_distribution
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96
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97 # Determine the distribution class -- either caller-supplied or
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98 # our Distribution (see below).
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99 klass = attrs.get('distclass')
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100 if klass:
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101 del attrs['distclass']
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102 else:
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103 klass = Distribution
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104
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105 if 'script_name' not in attrs:
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106 attrs['script_name'] = os.path.basename(sys.argv[0])
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107 if 'script_args' not in attrs:
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108 attrs['script_args'] = sys.argv[1:]
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109
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110 # Create the Distribution instance, using the remaining arguments
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111 # (ie. everything except distclass) to initialize it
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112 try:
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113 _setup_distribution = dist = klass(attrs)
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114 except DistutilsSetupError, msg:
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115 if 'name' in attrs:
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116 raise SystemExit, "error in %s setup command: %s" % \
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117 (attrs['name'], msg)
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118 else:
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119 raise SystemExit, "error in setup command: %s" % msg
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120
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121 if _setup_stop_after == "init":
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122 return dist
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123
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124 # Find and parse the config file(s): they will override options from
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125 # the setup script, but be overridden by the command line.
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126 dist.parse_config_files()
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127
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128 if DEBUG:
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129 print "options (after parsing config files):"
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130 dist.dump_option_dicts()
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131
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132 if _setup_stop_after == "config":
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133 return dist
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134
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135 # Parse the command line; any command-line errors are the end user's
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136 # fault, so turn them into SystemExit to suppress tracebacks.
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137 try:
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138 ok = dist.parse_command_line()
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139 except DistutilsArgError, msg:
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140 raise SystemExit, gen_usage(dist.script_name) + "\nerror: %s" % msg
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141
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142 if DEBUG:
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143 print "options (after parsing command line):"
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144 dist.dump_option_dicts()
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145
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146 if _setup_stop_after == "commandline":
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147 return dist
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148
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149 # And finally, run all the commands found on the command line.
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150 if ok:
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151 try:
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152 dist.run_commands()
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153 except KeyboardInterrupt:
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154 raise SystemExit, "interrupted"
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155 except (IOError, os.error), exc:
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156 error = grok_environment_error(exc)
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157
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158 if DEBUG:
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159 sys.stderr.write(error + "\n")
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160 raise
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161 else:
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162 raise SystemExit, error
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163
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164 except (DistutilsError,
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165 CCompilerError), msg:
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166 if DEBUG:
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167 raise
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168 else:
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169 raise SystemExit, "error: " + str(msg)
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170
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171 return dist
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172
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173 # setup ()
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174
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175
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176 def run_setup (script_name, script_args=None, stop_after="run"):
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177 """Run a setup script in a somewhat controlled environment, and
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178 return the Distribution instance that drives things. This is useful
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179 if you need to find out the distribution meta-data (passed as
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180 keyword args from 'script' to 'setup()', or the contents of the
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181 config files or command-line.
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182
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183 'script_name' is a file that will be run with 'execfile()';
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184 'sys.argv[0]' will be replaced with 'script' for the duration of the
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185 call. 'script_args' is a list of strings; if supplied,
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186 'sys.argv[1:]' will be replaced by 'script_args' for the duration of
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187 the call.
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188
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189 'stop_after' tells 'setup()' when to stop processing; possible
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190 values:
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191 init
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192 stop after the Distribution instance has been created and
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193 populated with the keyword arguments to 'setup()'
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194 config
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195 stop after config files have been parsed (and their data
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196 stored in the Distribution instance)
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197 commandline
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198 stop after the command-line ('sys.argv[1:]' or 'script_args')
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199 have been parsed (and the data stored in the Distribution)
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200 run [default]
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201 stop after all commands have been run (the same as if 'setup()'
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202 had been called in the usual way
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203
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204 Returns the Distribution instance, which provides all information
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205 used to drive the Distutils.
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206 """
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207 if stop_after not in ('init', 'config', 'commandline', 'run'):
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208 raise ValueError, "invalid value for 'stop_after': %r" % (stop_after,)
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209
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210 global _setup_stop_after, _setup_distribution
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211 _setup_stop_after = stop_after
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212
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213 save_argv = sys.argv
46285
fb3c9bb76b29 - Issue #2385: distutils.core.run_script() makes __file__ available, so the
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214 g = {'__file__': script_name}
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215 l = {}
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216 try:
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217 try:
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218 sys.argv[0] = script_name
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219 if script_args is not None:
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220 sys.argv[1:] = script_args
48282
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221 exec open(script_name, 'r').read() in g, l
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222 finally:
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223 sys.argv = save_argv
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224 _setup_stop_after = None
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225 except SystemExit:
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226 # Hmm, should we do something if exiting with a non-zero code
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227 # (ie. error)?
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228 pass
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229 except:
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230 raise
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231
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232 if _setup_distribution is None:
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233 raise RuntimeError, \
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234 ("'distutils.core.setup()' was never called -- "
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235 "perhaps '%s' is not a Distutils setup script?") % \
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236 script_name
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237
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238 # I wonder if the setup script's namespace -- g and l -- would be of
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239 # any interest to callers?
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240 #print "_setup_distribution:", _setup_distribution
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241 return _setup_distribution
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242
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243 # run_setup ()