diff options
| -rw-r--r-- | setup.py | 41 |
1 files changed, 33 insertions, 8 deletions
@@ -140,6 +140,37 @@ class PyTest(test): sys.exit(errno) +def keywords_with_side_effects(): + """ + Get a dictionary with setup keywords that (can) have side effects. + + This setup.py script uses the setuptools 'setup_requires' feature because + this is required by the cffi package to compile extension modules. The + purpose of ``keywords_with_side_effects()`` is to avoid triggering the cffi + build process as a result of any of the following ``setup.py`` invocations: + + - ``python setup.py --help-commands`` + - ``python setup.py --help`` + - ``python setup.py --version`` + - ``python setup.py clean`` + - ``python setup.py egg_info`` + + This function is based on the `setup.py script of SciPy`_ (see also the + discussion in `pip issue #25`_). + + .. _pip issue #25: https://github.com/pypa/pip/issues/25 + .. _setup.py script of SciPy: https://github.com/scipy/scipy/blob/master/setup.py + """ + if len(sys.argv) >= 2 and ('--help' in sys.argv[1:] or + sys.argv[1] in ('--help-commands', '--version', 'clean', 'egg_info')): + return {} + else: + return dict(setup_requires=requirements, + cmdclass=dict(build=CFFIBuild, + install=CFFIInstall, + test=PyTest)) + + with open(os.path.join(base_dir, "README.rst")) as f: long_description = f.read() @@ -182,19 +213,13 @@ setup( include_package_data=True, install_requires=requirements, - setup_requires=requirements, tests_require=test_requirements, # for cffi zip_safe=False, ext_package="cryptography", - cmdclass={ - "build": CFFIBuild, - "install": CFFIInstall, - "test": PyTest, - }, - entry_points={ "cryptography.backends": backends, - } + }, + **keywords_with_side_effects() ) |