61 lines
2.1 KiB
Python
61 lines
2.1 KiB
Python
# Copyright 2016 gRPC authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Patches the spawn() command for windows compilers.
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Windows has an 8191 character command line limit, but some compilers
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support an @command_file directive where command_file is a file
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containing the full command line.
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"""
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from distutils import ccompiler
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import os
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import os.path
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import shutil
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import sys
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import tempfile
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MAX_COMMAND_LENGTH = 8191
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_classic_spawn = ccompiler.CCompiler.spawn
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def _commandfile_spawn(self, command):
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command_length = sum([len(arg) for arg in command])
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if os.name == 'nt' and command_length > MAX_COMMAND_LENGTH:
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# Even if this command doesn't support the @command_file, it will
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# fail as is so we try blindly
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print('Command line length exceeded, using command file')
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print(' '.join(command))
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temporary_directory = tempfile.mkdtemp()
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command_filename = os.path.abspath(
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os.path.join(temporary_directory, 'command'))
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with open(command_filename, 'w') as command_file:
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escaped_args = [
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'"' + arg.replace('\\', '\\\\') + '"' for arg in command[1:]
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]
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command_file.write(' '.join(escaped_args))
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modified_command = command[:1] + ['@{}'.format(command_filename)]
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try:
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_classic_spawn(self, modified_command)
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finally:
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shutil.rmtree(temporary_directory)
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else:
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_classic_spawn(self, command)
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def monkeypatch_spawn():
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"""Monkeypatching is dumb, but it's either that or we become maintainers of
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something much, much bigger."""
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ccompiler.CCompiler.spawn = _commandfile_spawn
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