| # Copyright 2016, Google Inc. |
| # All rights reserved. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions are |
| # met: |
| # |
| # * Redistributions of source code must retain the above copyright |
| # notice, this list of conditions and the following disclaimer. |
| # * Redistributions in binary form must reproduce the above |
| # copyright notice, this list of conditions and the following disclaimer |
| # in the documentation and/or other materials provided with the |
| # distribution. |
| # * Neither the name of Google Inc. nor the names of its |
| # contributors may be used to endorse or promote products derived from |
| # this software without specific prior written permission. |
| # |
| # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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| # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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| # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| """Covers inadequacies in distutils.""" |
| |
| from distutils import ccompiler |
| from distutils import errors |
| from distutils import unixccompiler |
| import os |
| import os.path |
| import shlex |
| import shutil |
| import sys |
| import tempfile |
| |
| def _unix_commandfile_spawn(self, command): |
| """Wrapper around distutils.util.spawn that attempts to use command files. |
| |
| Meant to replace the CCompiler method `spawn` on UnixCCompiler and its |
| derivatives (e.g. the MinGW32 compiler). |
| |
| Some commands like `gcc` (and friends like `clang`) support command files to |
| work around shell command length limits. |
| """ |
| # Sometimes distutils embeds the executables as full strings including some |
| # hard-coded flags rather than as lists. |
| command = list(shlex.split(command[0])) + list(command[1:]) |
| command_base = os.path.basename(command[0].strip()) |
| if command_base == 'ccache': |
| command_base = command[:2] |
| command_args = command[2:] |
| elif command_base.startswith('ccache') or command_base in ['gcc', 'clang', 'clang++', 'g++']: |
| command_base = command[:1] |
| command_args = command[1:] |
| else: |
| return ccompiler.CCompiler.spawn(self, command) |
| temporary_directory = tempfile.mkdtemp() |
| command_filename = os.path.abspath(os.path.join(temporary_directory, 'command')) |
| with open(command_filename, 'w') as command_file: |
| escaped_args = [arg.replace('\\', '\\\\') for arg in command_args] |
| command_file.write(' '.join(escaped_args)) |
| modified_command = command_base + ['@{}'.format(command_filename)] |
| result = ccompiler.CCompiler.spawn(self, modified_command) |
| shutil.rmtree(temporary_directory) |
| return result |
| |
| |
| def monkeypatch_unix_compiler(): |
| """Monkeypatching is dumb, but it's either that or we become maintainers of |
| something much, much bigger.""" |
| unixccompiler.UnixCCompiler.spawn = _unix_commandfile_spawn |