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bbfad95445
Change-Id: I79d52e24ed00e875d1cfbb1f316139ad7639aff6 Reviewed-on: https://code-review.googlesource.com/c/re2/+/62470 Reviewed-by: Paul Wankadia <junyer@google.com> Reviewed-by: Alex Chernyakhovsky <achernya@google.com>
129 lines
4.4 KiB
Python
129 lines
4.4 KiB
Python
# Copyright 2019 The RE2 Authors. All Rights Reserved.
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# Use of this source code is governed by a BSD-style
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# license that can be found in the LICENSE file.
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import os
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import setuptools
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import setuptools.command.build_ext
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import shutil
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import sys
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long_description = r"""A drop-in replacement for the re module.
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It uses RE2 under the hood, of course, so various PCRE features
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(e.g. backreferences, look-around assertions) are not supported.
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See https://github.com/google/re2/wiki/Syntax for the canonical
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reference, but known syntactic "gotchas" relative to Python are:
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* PCRE supports \Z and \z; RE2 supports \z; Python supports \z,
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but calls it \Z. You must rewrite \Z to \z in pattern strings.
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Known differences between this module's API and the re module's API:
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* The error class does not provide any error information as attributes.
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* The Options class replaces the re module's flags with RE2's options as
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gettable/settable properties. Please see re2.h for their documentation.
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* The pattern string and the input string do not have to be the same type.
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Any str will be encoded to UTF-8.
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* The pattern string cannot be str if the options specify Latin-1 encoding.
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Known issues with regard to building the C++ extension:
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* Building requires RE2 to be installed on your system.
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On Debian, for example, install the libre2-dev package.
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* Building requires pybind11 to be installed on your system OR venv.
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On Debian, for example, install the pybind11-dev package.
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For a venv, install the pybind11 package from PyPI.
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* Building on macOS is known to work, but has been known to fail.
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For example, the system Python may not know which compiler flags
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to set when building bindings for software installed by Homebrew;
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see https://docs.brew.sh/Homebrew-and-Python#brewed-python-modules.
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* Building on Windows has not been tested yet and will probably fail.
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"""
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class BuildExt(setuptools.command.build_ext.build_ext):
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def build_extension(self, ext):
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if 'GITHUB_ACTIONS' not in os.environ:
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return super().build_extension(ext)
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# For @pybind11_bazel's `python_configure()`.
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os.environ['PYTHON_BIN_PATH'] = sys.executable
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cmd = ['bazel', 'build']
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try:
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cpu = os.environ['BAZEL_CPU']
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cmd.append(f'--cpu={cpu}')
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cmd.append(f'--platforms=//python:{cpu}')
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if cpu == 'x64_x86_windows':
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# Register the local 32-bit C++ toolchain with highest priority.
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# (This is likely to break in some release of Bazel after 7.0.0,
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# but this special case can hopefully be entirely removed then.)
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cmd.append(f'--extra_toolchains=@local_config_cc//:cc-toolchain-{cpu}')
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except KeyError:
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pass
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# Register the local Python toolchain with highest priority.
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cmd.append('--extra_toolchains=@local_config_python//:py_toolchain')
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# Print debug information during toolchain resolution.
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cmd.append('--toolchain_resolution_debug=.*')
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cmd += ['--compilation_mode=opt', '--', ':all']
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self.spawn(cmd)
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# This ensures that f'_re2.{importlib.machinery.EXTENSION_SUFFIXES[0]}'
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# is the filename in the destination directory, which is what's needed.
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shutil.copyfile('../bazel-bin/python/_re2.so',
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self.get_ext_fullpath(ext.name))
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cmd = ['bazel', 'clean', '--expunge']
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self.spawn(cmd)
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def options():
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bdist_wheel = {}
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try:
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bdist_wheel['plat_name'] = os.environ['PLAT_NAME']
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except KeyError:
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pass
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return {'bdist_wheel': bdist_wheel}
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def include_dirs():
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try:
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import pybind11
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yield pybind11.get_include()
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except ModuleNotFoundError:
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pass
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ext_module = setuptools.Extension(
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name='_re2',
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sources=['_re2.cc'],
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include_dirs=list(include_dirs()),
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libraries=['re2'],
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extra_compile_args=['-fvisibility=hidden'],
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)
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setuptools.setup(
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name='google-re2',
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version='1.1',
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description='RE2 Python bindings',
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long_description=long_description,
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long_description_content_type='text/plain',
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author='The RE2 Authors',
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author_email='re2-dev@googlegroups.com',
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url='https://github.com/google/re2',
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py_modules=['re2'],
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ext_modules=[ext_module],
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classifiers=[
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'Development Status :: 5 - Production/Stable',
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'Intended Audience :: Developers',
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'License :: OSI Approved :: BSD License',
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'Programming Language :: C++',
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'Programming Language :: Python :: 3.8',
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],
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options=options(),
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cmdclass={'build_ext': BuildExt},
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python_requires='~=3.8',
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)
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