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#!/usr/bin/env python
import sys
import os
import re
from distutils.core import setup, Extension, Command

MINIMUM_CYTHON_VERSION = '0.13'

class TestCommand(Command):
    description = 'Run packaged tests'
    user_options = []
    def initialize_options(self):
        pass

    def finalize_options(self):
        pass

    def run(self):
        from tests import re2_test
        re2_test.testall()


def version_compare(version1, version2):
    def normalize(v):
        return [int(x) for x in re.sub(r'(\.0+)*$','', v).split(".")]
    return cmp(normalize(version1), normalize(version2))

cmdclass = {'test': TestCommand}

ext_files = []
if '--cython' in sys.argv[1:]:
    # Using Cython
    sys.argv.remove('--cython')
    from Cython.Compiler.Main import Version
    if version_compare(MINIMUM_CYTHON_VERSION, Version.version) > 0:
        raise ValueError("Cython is version %s, but needs to be at least %s." %
                         (Version.version, MINIMUM_CYTHON_VERSION))
    from Cython.Distutils import build_ext
    cmdclass['build_ext'] = build_ext
    ext_files.append("src/re2.pyx")
else:
    # Building from C
    ext_files.append("src/re2.cpp")


# Locate the re2 module
_re2_prefixes = [
    '/usr',
    '/usr/local',
    '/opt/',
    ]

for re2_prefix in _re2_prefixes:
    if os.path.exists(os.path.join(re2_prefix, "include", "re2")):
        break
else:
    raise OSError("Cannot find RE2 library. Please install it from http://code.google.com/p/re2/wiki/Install")

BASE_DIR = os.path.dirname(__file__)

def get_long_description():
    readme_f = open(os.path.join(BASE_DIR, "README.rst"))
    readme = readme_f.read()
    readme_f.close()
    return readme

def get_authors():
    author_re = re.compile(r'^\s*(.*?)\s+<.*?\@.*?>', re.M)
    authors_f = open(os.path.join(BASE_DIR, "AUTHORS"))
    authors = [match.group(1) for match in author_re.finditer(authors_f.read())]
    authors_f.close()
    return ', '.join(authors)

def main():
    setup(
        name="re2",
        version="0.2.20",
        description="Python wrapper for Google's RE2 using Cython",
        long_description=get_long_description(),
        author=get_authors(),
        license="New BSD License",
        author_email = "mike@axiak.net",
        url = "http://github.com/axiak/pyre2/",
        ext_modules = [Extension("re2",
                                 ext_files,
                                 language="c++",
                                 include_dirs=[os.path.join(re2_prefix, "include")],
                                 libraries=["re2"],
                                 library_dirs=[os.path.join(re2_prefix, "lib")],
                                 runtime_library_dirs=[os.path.join(re2_prefix, "lib")],
                                 )],
        cmdclass=cmdclass,
        classifiers = [
            'License :: OSI Approved :: BSD License',
            'Programming Language :: Cython',
            'Programming Language :: Python :: 2.5',
            'Programming Language :: Python :: 2.6',
            'Intended Audience :: Developers',
            'Topic :: Software Development :: Libraries :: Python Modules',
            ],
        )

if __name__ == '__main__':
    main()
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