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annotate Lib/distutils/command/install_lib.py @ 66807:d28126ebd60d

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author Raymond Hettinger <python@rcn.com>
date Thu, 09 Dec 2010 16:41:54 +0000
parents a3cb812d80f9
children 3e26c9033306
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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 PYTHON_SOURCE_EXTENSION = ".py"
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17
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18 class install_lib(Command):
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19
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20 description = "install all Python modules (extensions and pure Python)"
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21
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22 # The byte-compilation options are a tad confusing. Here are the
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23 # possible scenarios:
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24 # 1) no compilation at all (--no-compile --no-optimize)
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25 # 2) compile .pyc only (--compile --no-optimize; default)
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26 # 3) compile .pyc and "level 1" .pyo (--compile --optimize)
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27 # 4) compile "level 1" .pyo only (--no-compile --optimize)
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28 # 5) compile .pyc and "level 2" .pyo (--compile --optimize-more)
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29 # 6) compile "level 2" .pyo only (--no-compile --optimize-more)
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30 #
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31 # The UI for this is two option, 'compile' and 'optimize'.
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32 # 'compile' is strictly boolean, and only decides whether to
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33 # generate .pyc files. 'optimize' is three-way (0, 1, or 2), and
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34 # decides both whether to generate .pyo files and what level of
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35 # optimization to use.
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36
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37 user_options = [
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38 ('install-dir=', 'd', "directory to install to"),
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39 ('build-dir=','b', "build directory (where to install from)"),
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40 ('force', 'f', "force installation (overwrite existing files)"),
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41 ('compile', 'c', "compile .py to .pyc [default]"),
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42 ('no-compile', None, "don't compile .py files"),
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43 ('optimize=', 'O',
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44 "also compile with optimization: -O1 for \"python -O\", "
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45 "-O2 for \"python -OO\", and -O0 to disable [default: -O0]"),
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46 ('skip-build', None, "skip the build steps"),
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47 ]
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48
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49 boolean_options = ['force', 'compile', 'skip-build']
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50 negative_opt = {'no-compile' : 'compile'}
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51
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52 def initialize_options(self):
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53 # let the 'install' command dictate our installation directory
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54 self.install_dir = None
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55 self.build_dir = None
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56 self.force = 0
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57 self.compile = None
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58 self.optimize = None
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59 self.skip_build = None
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60
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61 def finalize_options(self):
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62 # Get all the information we need to install pure Python modules
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63 # from the umbrella 'install' command -- build (source) directory,
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64 # install (target) directory, and whether to compile .py files.
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65 self.set_undefined_options('install',
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66 ('build_lib', 'build_dir'),
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67 ('install_lib', 'install_dir'),
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68 ('force', 'force'),
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69 ('compile', 'compile'),
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70 ('optimize', 'optimize'),
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71 ('skip_build', 'skip_build'),
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72 )
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73
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74 if self.compile is None:
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75 self.compile = True
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76 if self.optimize is None:
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77 self.optimize = False
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78
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79 if not isinstance(self.optimize, int):
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80 try:
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81 self.optimize = int(self.optimize)
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82 if self.optimize not in (0, 1, 2):
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83 raise AssertionError
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84 except (ValueError, AssertionError):
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85 raise DistutilsOptionError("optimize must be 0, 1, or 2")
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86
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87 def run(self):
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88 # Make sure we have built everything we need first
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89 self.build()
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90
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91 # Install everything: simply dump the entire contents of the build
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92 # directory to the installation directory (that's the beauty of
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93 # having a build directory!)
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94 outfiles = self.install()
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95
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96 # (Optionally) compile .py to .pyc
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97 if outfiles is not None and self.distribution.has_pure_modules():
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98 self.byte_compile(outfiles)
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99
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100 # -- Top-level worker functions ------------------------------------
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101 # (called from 'run()')
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102
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103 def build(self):
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104 if not self.skip_build:
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105 if self.distribution.has_pure_modules():
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106 self.run_command('build_py')
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107 if self.distribution.has_ext_modules():
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108 self.run_command('build_ext')
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109
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110 def install(self):
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111 if os.path.isdir(self.build_dir):
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112 outfiles = self.copy_tree(self.build_dir, self.install_dir)
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113 else:
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114 self.warn("'%s' does not exist -- no Python modules to install" %
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115 self.build_dir)
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116 return
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117 return outfiles
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118
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119 def byte_compile(self, files):
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120 if sys.dont_write_bytecode:
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121 self.warn('byte-compiling is disabled, skipping.')
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122 return
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123
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124 from distutils.util import byte_compile
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125
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126 # Get the "--root" directory supplied to the "install" command,
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127 # and use it as a prefix to strip off the purported filename
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128 # encoded in bytecode files. This is far from complete, but it
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129 # should at least generate usable bytecode in RPM distributions.
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130 install_root = self.get_finalized_command('install').root
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131
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132 if self.compile:
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133 byte_compile(files, optimize=0,
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134 force=self.force, prefix=install_root,
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135 dry_run=self.dry_run)
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136 if self.optimize > 0:
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137 byte_compile(files, optimize=self.optimize,
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138 force=self.force, prefix=install_root,
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139 verbose=self.verbose, dry_run=self.dry_run)
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140
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141
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142 # -- Utility methods -----------------------------------------------
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143
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144 def _mutate_outputs(self, has_any, build_cmd, cmd_option, output_dir):
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145 if not has_any:
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146 return []
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147
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148 build_cmd = self.get_finalized_command(build_cmd)
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149 build_files = build_cmd.get_outputs()
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150 build_dir = getattr(build_cmd, cmd_option)
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151
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152 prefix_len = len(build_dir) + len(os.sep)
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153 outputs = []
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154 for file in build_files:
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155 outputs.append(os.path.join(output_dir, file[prefix_len:]))
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156
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157 return outputs
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158
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159 def _bytecode_filenames(self, py_filenames):
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160 bytecode_files = []
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161 for py_file in py_filenames:
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162 # Since build_py handles package data installation, the
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163 # list of outputs can contain more than just .py files.
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164 # Make sure we only report bytecode for the .py files.
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165 ext = os.path.splitext(os.path.normcase(py_file))[1]
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166 if ext != PYTHON_SOURCE_EXTENSION:
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167 continue
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168 if self.compile:
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169 bytecode_files.append(py_file + "c")
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170 if self.optimize > 0:
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171 bytecode_files.append(py_file + "o")
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172
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173 return bytecode_files
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174
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175
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176 # -- External interface --------------------------------------------
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177 # (called by outsiders)
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178
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179 def get_outputs(self):
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180 """Return the list of files that would be installed if this command
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181 were actually run. Not affected by the "dry-run" flag or whether
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182 modules have actually been built yet.
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183 """
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184 pure_outputs = \
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185 self._mutate_outputs(self.distribution.has_pure_modules(),
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186 'build_py', 'build_lib',
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187 self.install_dir)
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188 if self.compile:
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189 bytecode_outputs = self._bytecode_filenames(pure_outputs)
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190 else:
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191 bytecode_outputs = []
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192
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193 ext_outputs = \
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194 self._mutate_outputs(self.distribution.has_ext_modules(),
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195 'build_ext', 'build_lib',
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196 self.install_dir)
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197
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198 return pure_outputs + bytecode_outputs + ext_outputs
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199
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200 def get_inputs(self):
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201 """Get the list of files that are input to this command, ie. the
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202 files that get installed as they are named in the build tree.
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203 The files in this list correspond one-to-one to the output
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204 filenames returned by 'get_outputs()'.
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205 """
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206 inputs = []
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207
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208 if self.distribution.has_pure_modules():
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209 build_py = self.get_finalized_command('build_py')
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210 inputs.extend(build_py.get_outputs())
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211
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212 if self.distribution.has_ext_modules():
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213 build_ext = self.get_finalized_command('build_ext')
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214 inputs.extend(build_ext.get_outputs())
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215
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216 return inputs