#!/usr/bin/env python
# -*- encoding: utf-8 -*-
from __future__ import absolute_import
from __future__ import print_function

import io
import os
import platform
import re
from glob import glob
from os.path import basename
from os.path import dirname
from os.path import join
from os.path import relpath
from os.path import splitext

from setuptools import Extension
from setuptools import find_packages
from setuptools import setup
from setuptools.command.build_ext import build_ext

# Enable code coverage for C code: we can't use CFLAGS=-coverage in tox.ini, since that may mess with compiling
# dependencies (e.g. numpy). Therefore we set SETUPPY_CFLAGS=-coverage in tox.ini and copy it to CFLAGS here (after
# deps have been safely installed).
if 'TOX_ENV_NAME' in os.environ and os.environ.get('SETUP_PY_EXT_COVERAGE') == 'yes' and platform.system() == 'Linux':
    CFLAGS = os.environ['CFLAGS'] = '-fprofile-arcs -ftest-coverage'
    LFLAGS = os.environ['LFLAGS'] = '-lgcov'
else:
    CFLAGS = ''
    LFLAGS = ''


class optional_build_ext(build_ext):
    """Allow the building of C extensions to fail."""
    def run(self):
        try:
            build_ext.run(self)
        except Exception as e:
            self._unavailable(e)
            self.extensions = []  # avoid copying missing files (it would fail).

    def _unavailable(self, e):
        print('*' * 80)
        print('''WARNING:

    An optional code optimization (C extension) could not be compiled.

    Optimizations for this package will not be available!
        ''')

        print('CAUSE:')
        print('')
        print('    ' + repr(e))
        print('*' * 80)


def read(*names, **kwargs):
    with io.open(
        join(dirname(__file__), *names),
        encoding=kwargs.get('encoding', 'utf8')
    ) as fh:
        return fh.read()


setup(
    name='lazy-object-proxy',
    use_scm_version={
        'local_scheme': 'dirty-tag',
        'write_to': 'src/lazy_object_proxy/_version.py',
        'fallback_version': '1.5.1',
    },
    license='BSD-2-Clause',
    description='A fast and thorough lazy object proxy.',
    long_description='%s\n%s' % (
        re.compile('^.. start-badges.*^.. end-badges', re.M | re.S).sub('', read('README.rst')),
        re.sub(':[a-z]+:`~?(.*?)`', r'``\1``', read('CHANGELOG.rst'))
    ),
    author='Ionel Cristian Mărieș',
    author_email='contact@ionelmc.ro',
    url='https://github.com/ionelmc/python-lazy-object-proxy',
    packages=find_packages('src'),
    package_dir={'': 'src'},
    py_modules=[splitext(basename(path))[0] for path in glob('src/*.py')],
    include_package_data=False,
    zip_safe=False,
    classifiers=[
        # complete classifier list: http://pypi.python.org/pypi?%3Aaction=list_classifiers
        'Development Status :: 5 - Production/Stable',
        'Intended Audience :: Developers',
        'License :: OSI Approved :: BSD License',
        'Operating System :: Unix',
        'Operating System :: POSIX',
        'Operating System :: Microsoft :: Windows',
        'Programming Language :: Python',
        'Programming Language :: Python :: 2.7',
        'Programming Language :: Python :: 3',
        'Programming Language :: Python :: 3.5',
        'Programming Language :: Python :: 3.6',
        'Programming Language :: Python :: 3.7',
        'Programming Language :: Python :: 3.8',
        'Programming Language :: Python :: Implementation :: CPython',
        'Programming Language :: Python :: Implementation :: PyPy',
        # uncomment if you test on these interpreters:
        # 'Programming Language :: Python :: Implementation :: IronPython',
        # 'Programming Language :: Python :: Implementation :: Jython',
        # 'Programming Language :: Python :: Implementation :: Stackless',
        'Topic :: Utilities',
    ],
    project_urls={
        'Documentation': 'https://python-lazy-object-proxy.readthedocs.io/',
        'Changelog': 'https://python-lazy-object-proxy.readthedocs.io/en/latest/changelog.html',
        'Issue Tracker': 'https://github.com/ionelmc/python-lazy-object-proxy/issues',
    },
    keywords=[
        # eg: 'keyword1', 'keyword2', 'keyword3',
    ],
    python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*',
    install_requires=[
        # eg: 'aspectlib==1.1.1', 'six>=1.7',
    ],
    extras_require={
        # eg:
        #   'rst': ['docutils>=0.11'],
        #   ':python_version=="2.6"': ['argparse'],
    },
    cmdclass={'build_ext': optional_build_ext},
    ext_modules=[
        Extension(
            splitext(relpath(path, 'src').replace(os.sep, '.'))[0],
            sources=[path],
            extra_compile_args=CFLAGS.split(),
            extra_link_args=LFLAGS.split(),
            include_dirs=[dirname(path)]
        )
        for root, _, _ in os.walk('src')
        for path in glob(join(root, '*.c'))
    ],
)
