contrib/python-zstandard/setup.py

discovery-helper: bail out if destination already exists

#!/usr/bin/env python
# Copyright (c) 2016-present, Gregory Szorc
# All rights reserved.
#
# This software may be modified and distributed under the terms
# of the BSD license. See the LICENSE file for details.

import os
import sys
from setuptools import setup

try:
    import cffi
except ImportError:
    cffi = None

import setup_zstd

SUPPORT_LEGACY = False
SYSTEM_ZSTD = False
WARNINGS_AS_ERRORS = False

if os.environ.get('ZSTD_WARNINGS_AS_ERRORS', ''):
    WARNINGS_AS_ERRORS = True

if '--legacy' in sys.argv:
    SUPPORT_LEGACY = True
    sys.argv.remove('--legacy')

if '--system-zstd' in sys.argv:
    SYSTEM_ZSTD = True
    sys.argv.remove('--system-zstd')

if '--warnings-as-errors' in sys.argv:
    WARNINGS_AS_ERRORS = True
    sys.argv.remove('--warning-as-errors')

# Code for obtaining the Extension instance is in its own module to
# facilitate reuse in other projects.
extensions = [
    setup_zstd.get_c_extension(name='zstd',
                               support_legacy=SUPPORT_LEGACY,
                               system_zstd=SYSTEM_ZSTD,
                               warnings_as_errors=WARNINGS_AS_ERRORS),
]

install_requires = []

if cffi:
    import make_cffi
    extensions.append(make_cffi.ffi.distutils_extension())

    # Need change in 1.10 for ffi.from_buffer() to handle all buffer types
    # (like memoryview).
    # Need feature in 1.11 for ffi.gc() to declare size of objects so we avoid
    # garbage collection pitfalls.
    install_requires.append('cffi>=1.11')

version = None

with open('c-ext/python-zstandard.h', 'r') as fh:
    for line in fh:
        if not line.startswith('#define PYTHON_ZSTANDARD_VERSION'):
            continue

        version = line.split()[2][1:-1]
        break

if not version:
    raise Exception('could not resolve package version; '
                    'this should never happen')

setup(
    name='zstandard',
    version=version,
    description='Zstandard bindings for Python',
    long_description=open('README.rst', 'r').read(),
    url='https://github.com/indygreg/python-zstandard',
    author='Gregory Szorc',
    author_email='[e-mail]',
    license='BSD',
    classifiers=[
        'Development Status :: 4 - Beta',
        'Intended Audience :: Developers',
        'License :: OSI Approved :: BSD License',
        'Programming Language :: C',
        'Programming Language :: Python :: 2.7',
        'Programming Language :: Python :: 3.4',
        'Programming Language :: Python :: 3.5',
        'Programming Language :: Python :: 3.6',
    ],
    keywords='zstandard zstd compression',
    packages=['zstandard'],
    ext_modules=extensions,
    test_suite='tests',
    install_requires=install_requires,
)