Mercurial > cpython-lru_cache-weakref

annotate Lib/packaging/command/install_lib.py @ 73798:6cde416ef03b

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Credit Per Øyvind Karlsen for the initial implementation of the lzma module (issue #6715).
author Nadeem Vawda <nadeem.vawda@gmail.com>
date Thu, 01 Dec 2011 01:18:27 +0200
parents c10946a17420
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 """Install all modules (extensions and pure Python)."""
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2
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3 import os
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4 import imp
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5
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6 from packaging import logger
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7 from packaging.command.cmd import Command
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8 from packaging.errors import PackagingOptionError
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9
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10
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11 # Extension for Python source files.
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12 # XXX dead code? most of the codebase checks for literal '.py'
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13 if hasattr(os, 'extsep'):
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14 PYTHON_SOURCE_EXTENSION = os.extsep + "py"
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15 else:
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16 PYTHON_SOURCE_EXTENSION = ".py"
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17
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18
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19 class install_lib(Command):
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20
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21 description = "install all modules (extensions and pure Python)"
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22
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23 # The options for controlling byte compilation are two independent sets:
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24 # 'compile' is strictly boolean, and only decides whether to
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25 # generate .pyc files. 'optimize' is three-way (0, 1, or 2), and
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26 # decides both whether to generate .pyo files and what level of
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27 # optimization to use.
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28
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29 user_options = [
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30 ('install-dir=', 'd', "directory to install to"),
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31 ('build-dir=', 'b', "build directory (where to install from)"),
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32 ('force', 'f', "force installation (overwrite existing files)"),
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33 ('compile', 'c', "compile .py to .pyc [default]"),
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34 ('no-compile', None, "don't compile .py files"),
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35 ('optimize=', 'O',
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36 "also compile with optimization: -O1 for \"python -O\", "
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37 "-O2 for \"python -OO\", and -O0 to disable [default: -O0]"),
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38 ('skip-build', None, "skip the build steps"),
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39 ]
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40
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41 boolean_options = ['force', 'compile', 'skip-build']
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42
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43 negative_opt = {'no-compile': 'compile'}
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44
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45 def initialize_options(self):
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46 # let the 'install_dist' command dictate our installation directory
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47 self.install_dir = None
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48 self.build_dir = None
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49 self.force = False
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50 self.compile = None
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51 self.optimize = None
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52 self.skip_build = None
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53
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54 def finalize_options(self):
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55 # Get all the information we need to install pure Python modules
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56 # from the umbrella 'install_dist' command -- build (source) directory,
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57 # install (target) directory, and whether to compile .py files.
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58 self.set_undefined_options('install_dist',
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59 ('build_lib', 'build_dir'),
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60 ('install_lib', 'install_dir'),
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61 'force', 'compile', 'optimize',
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62 'skip_build')
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63
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64 if self.compile is None:
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65 self.compile = True
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66 if self.optimize is None:
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67 self.optimize = 0
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68
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69 if not isinstance(self.optimize, int):
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70 try:
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71 self.optimize = int(self.optimize)
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72 if self.optimize not in (0, 1, 2):
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73 raise AssertionError
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74 except (ValueError, AssertionError):
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75 raise PackagingOptionError("optimize must be 0, 1, or 2")
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76
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77 def run(self):
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78 # Make sure we have built everything we need first
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79 self.build()
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80
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81 # Install everything: simply dump the entire contents of the build
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82 # directory to the installation directory (that's the beauty of
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83 # having a build directory!)
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84 outfiles = self.install()
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85
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86 # (Optionally) compile .py to .pyc and/or .pyo
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87 if outfiles is not None and self.distribution.has_pure_modules():
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88 # XXX comment from distutils: "This [prefix stripping] is far from
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89 # complete, but it should at least generate usable bytecode in RPM
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90 # distributions." -> need to find exact requirements for
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91 # byte-compiled files and fix it
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92 install_root = self.get_finalized_command('install_dist').root
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93 self.byte_compile(outfiles, prefix=install_root)
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94
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95 # -- Top-level worker functions ------------------------------------
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96 # (called from 'run()')
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97
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98 def build(self):
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99 if not self.skip_build:
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100 if self.distribution.has_pure_modules():
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101 self.run_command('build_py')
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102 if self.distribution.has_ext_modules():
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103 self.run_command('build_ext')
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104
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105 def install(self):
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106 if os.path.isdir(self.build_dir):
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107 outfiles = self.copy_tree(self.build_dir, self.install_dir)
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108 else:
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109 logger.warning(
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110 '%s: %r does not exist -- no Python modules to install',
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111 self.get_command_name(), self.build_dir)
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112 return
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113 return outfiles
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114
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115 # -- Utility methods -----------------------------------------------
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116
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117 def _mutate_outputs(self, has_any, build_cmd, cmd_option, output_dir):
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118 if not has_any:
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119 return []
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120
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121 build_cmd = self.get_finalized_command(build_cmd)
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122 build_files = build_cmd.get_outputs()
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123 build_dir = getattr(build_cmd, cmd_option)
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124
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125 prefix_len = len(build_dir) + len(os.sep)
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126 outputs = []
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127 for file in build_files:
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128 outputs.append(os.path.join(output_dir, file[prefix_len:]))
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129
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130 return outputs
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131
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132 def _bytecode_filenames(self, py_filenames):
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133 bytecode_files = []
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134 for py_file in py_filenames:
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135 # Since build_py handles package data installation, the
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136 # list of outputs can contain more than just .py files.
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137 # Make sure we only report bytecode for the .py files.
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138 ext = os.path.splitext(os.path.normcase(py_file))[1]
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139 if ext != PYTHON_SOURCE_EXTENSION:
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140 continue
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141 if self.compile:
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142 bytecode_files.append(imp.cache_from_source(py_file, True))
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143 if self.optimize:
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144 bytecode_files.append(imp.cache_from_source(py_file, False))
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145
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146 return bytecode_files
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147
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148 # -- External interface --------------------------------------------
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149 # (called by outsiders)
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150
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151 def get_outputs(self):
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152 """Return the list of files that would be installed if this command
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153 were actually run. Not affected by the "dry-run" flag or whether
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154 modules have actually been built yet.
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155 """
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156 pure_outputs = \
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157 self._mutate_outputs(self.distribution.has_pure_modules(),
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158 'build_py', 'build_lib',
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159 self.install_dir)
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160 if self.compile:
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161 bytecode_outputs = self._bytecode_filenames(pure_outputs)
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162 else:
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163 bytecode_outputs = []
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164
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165 ext_outputs = \
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166 self._mutate_outputs(self.distribution.has_ext_modules(),
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167 'build_ext', 'build_lib',
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168 self.install_dir)
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169
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170 return pure_outputs + bytecode_outputs + ext_outputs
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171
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172 def get_inputs(self):
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173 """Get the list of files that are input to this command, ie. the
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174 files that get installed as they are named in the build tree.
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175 The files in this list correspond one-to-one to the output
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176 filenames returned by 'get_outputs()'.
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177 """
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178 inputs = []
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179
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180 if self.distribution.has_pure_modules():
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181 build_py = self.get_finalized_command('build_py')
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182 inputs.extend(build_py.get_outputs())
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183
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184 if self.distribution.has_ext_modules():
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185 build_ext = self.get_finalized_command('build_ext')
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186 inputs.extend(build_ext.get_outputs())
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187
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188 return inputs