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annotate Lib/distutils/command/install_lib.py @ 80661:94de77bd0b4b 2.7

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Issue #16194: document imp.load_dynamic problems when read several extension modules from the same binary object file.
author Andrew Svetlov <andrew.svetlov@gmail.com>
date Thu, 29 Nov 2012 19:51:28 +0200
parents b36cb4602e21
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 """distutils.command.install_lib
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2
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3 Implements the Distutils 'install_lib' command
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4 (install all Python modules)."""
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5
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6 __revision__ = "$Id$"
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7
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8 import os
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9 import sys
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10
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11 from distutils.core import Command
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12 from distutils.errors import DistutilsOptionError
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13
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14
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15 # Extension for Python source files.
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16 if hasattr(os, 'extsep'):
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17 PYTHON_SOURCE_EXTENSION = os.extsep + "py"
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18 else:
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19 PYTHON_SOURCE_EXTENSION = ".py"
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20
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21 class install_lib(Command):
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22
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23 description = "install all Python modules (extensions and pure Python)"
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24
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25 # The byte-compilation options are a tad confusing. Here are the
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26 # possible scenarios:
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27 # 1) no compilation at all (--no-compile --no-optimize)
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28 # 2) compile .pyc only (--compile --no-optimize; default)
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29 # 3) compile .pyc and "level 1" .pyo (--compile --optimize)
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30 # 4) compile "level 1" .pyo only (--no-compile --optimize)
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31 # 5) compile .pyc and "level 2" .pyo (--compile --optimize-more)
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32 # 6) compile "level 2" .pyo only (--no-compile --optimize-more)
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33 #
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34 # The UI for this is two option, 'compile' and 'optimize'.
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35 # 'compile' is strictly boolean, and only decides whether to
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36 # generate .pyc files. 'optimize' is three-way (0, 1, or 2), and
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37 # decides both whether to generate .pyo files and what level of
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38 # optimization to use.
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39
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40 user_options = [
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41 ('install-dir=', 'd', "directory to install to"),
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42 ('build-dir=','b', "build directory (where to install from)"),
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43 ('force', 'f', "force installation (overwrite existing files)"),
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44 ('compile', 'c', "compile .py to .pyc [default]"),
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45 ('no-compile', None, "don't compile .py files"),
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46 ('optimize=', 'O',
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47 "also compile with optimization: -O1 for \"python -O\", "
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48 "-O2 for \"python -OO\", and -O0 to disable [default: -O0]"),
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49 ('skip-build', None, "skip the build steps"),
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50 ]
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51
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52 boolean_options = ['force', 'compile', 'skip-build']
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53 negative_opt = {'no-compile' : 'compile'}
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54
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55 def initialize_options(self):
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56 # let the 'install' command dictate our installation directory
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57 self.install_dir = None
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58 self.build_dir = None
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59 self.force = 0
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60 self.compile = None
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61 self.optimize = None
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62 self.skip_build = None
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63
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64 def finalize_options(self):
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65 # Get all the information we need to install pure Python modules
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66 # from the umbrella 'install' command -- build (source) directory,
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67 # install (target) directory, and whether to compile .py files.
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68 self.set_undefined_options('install',
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69 ('build_lib', 'build_dir'),
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70 ('install_lib', 'install_dir'),
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71 ('force', 'force'),
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72 ('compile', 'compile'),
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73 ('optimize', 'optimize'),
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74 ('skip_build', 'skip_build'),
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75 )
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76
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77 if self.compile is None:
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78 self.compile = 1
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79 if self.optimize is None:
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80 self.optimize = 0
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81
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82 if not isinstance(self.optimize, int):
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83 try:
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84 self.optimize = int(self.optimize)
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85 if self.optimize not in (0, 1, 2):
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86 raise AssertionError
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87 except (ValueError, AssertionError):
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88 raise DistutilsOptionError, "optimize must be 0, 1, or 2"
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89
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90 def run(self):
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91 # Make sure we have built everything we need first
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92 self.build()
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93
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94 # Install everything: simply dump the entire contents of the build
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95 # directory to the installation directory (that's the beauty of
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96 # having a build directory!)
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97 outfiles = self.install()
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98
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99 # (Optionally) compile .py to .pyc
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100 if outfiles is not None and self.distribution.has_pure_modules():
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101 self.byte_compile(outfiles)
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102
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103 # -- Top-level worker functions ------------------------------------
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104 # (called from 'run()')
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105
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106 def build(self):
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107 if not self.skip_build:
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108 if self.distribution.has_pure_modules():
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109 self.run_command('build_py')
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110 if self.distribution.has_ext_modules():
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111 self.run_command('build_ext')
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112
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113 def install(self):
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114 if os.path.isdir(self.build_dir):
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115 outfiles = self.copy_tree(self.build_dir, self.install_dir)
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116 else:
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117 self.warn("'%s' does not exist -- no Python modules to install" %
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118 self.build_dir)
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119 return
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120 return outfiles
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121
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122 def byte_compile(self, files):
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123 if sys.dont_write_bytecode:
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124 self.warn('byte-compiling is disabled, skipping.')
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125 return
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126
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127 from distutils.util import byte_compile
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128
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129 # Get the "--root" directory supplied to the "install" command,
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130 # and use it as a prefix to strip off the purported filename
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131 # encoded in bytecode files. This is far from complete, but it
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132 # should at least generate usable bytecode in RPM distributions.
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133 install_root = self.get_finalized_command('install').root
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134
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135 if self.compile:
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136 byte_compile(files, optimize=0,
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137 force=self.force, prefix=install_root,
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138 dry_run=self.dry_run)
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139 if self.optimize > 0:
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140 byte_compile(files, optimize=self.optimize,
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141 force=self.force, prefix=install_root,
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142 verbose=self.verbose, dry_run=self.dry_run)
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143
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144
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145 # -- Utility methods -----------------------------------------------
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146
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147 def _mutate_outputs(self, has_any, build_cmd, cmd_option, output_dir):
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148 if not has_any:
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149 return []
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150
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151 build_cmd = self.get_finalized_command(build_cmd)
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152 build_files = build_cmd.get_outputs()
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153 build_dir = getattr(build_cmd, cmd_option)
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154
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155 prefix_len = len(build_dir) + len(os.sep)
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156 outputs = []
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157 for file in build_files:
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158 outputs.append(os.path.join(output_dir, file[prefix_len:]))
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159
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160 return outputs
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161
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162 def _bytecode_filenames(self, py_filenames):
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163 bytecode_files = []
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164 for py_file in py_filenames:
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165 # Since build_py handles package data installation, the
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166 # list of outputs can contain more than just .py files.
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167 # Make sure we only report bytecode for the .py files.
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168 ext = os.path.splitext(os.path.normcase(py_file))[1]
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169 if ext != PYTHON_SOURCE_EXTENSION:
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170 continue
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171 if self.compile:
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172 bytecode_files.append(py_file + "c")
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173 if self.optimize > 0:
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174 bytecode_files.append(py_file + "o")
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175
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176 return bytecode_files
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177
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178
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179 # -- External interface --------------------------------------------
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180 # (called by outsiders)
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181
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182 def get_outputs(self):
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183 """Return the list of files that would be installed if this command
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184 were actually run. Not affected by the "dry-run" flag or whether
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185 modules have actually been built yet.
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186 """
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187 pure_outputs = \
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188 self._mutate_outputs(self.distribution.has_pure_modules(),
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189 'build_py', 'build_lib',
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190 self.install_dir)
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191 if self.compile:
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192 bytecode_outputs = self._bytecode_filenames(pure_outputs)
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193 else:
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194 bytecode_outputs = []
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195
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196 ext_outputs = \
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197 self._mutate_outputs(self.distribution.has_ext_modules(),
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198 'build_ext', 'build_lib',
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199 self.install_dir)
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200
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201 return pure_outputs + bytecode_outputs + ext_outputs
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202
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203 def get_inputs(self):
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204 """Get the list of files that are input to this command, ie. the
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205 files that get installed as they are named in the build tree.
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206 The files in this list correspond one-to-one to the output
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207 filenames returned by 'get_outputs()'.
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208 """
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209 inputs = []
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210
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211 if self.distribution.has_pure_modules():
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212 build_py = self.get_finalized_command('build_py')
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213 inputs.extend(build_py.get_outputs())
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214
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215 if self.distribution.has_ext_modules():
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216 build_ext = self.get_finalized_command('build_ext')
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217 inputs.extend(build_ext.get_outputs())
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218
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219 return inputs