#!/usr/bin/env python
#
# Copyright (c) 2015, SmartFile <tcunningham@smartfile.com>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
#       notice, this list of conditions and the following disclaimer in the
#       documentation and/or other materials provided with the distribution.
#     * Neither the name of the organization nor the
#       names of its contributors may be used to endorse or promote products
#       derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

from os import environ

try:
    from setuptools import setup, Extension
    from setuptools.command.build_ext import build_ext
except ImportError:
    from distutils.core import setup, Extension
    from distutils.command.build_ext import build_ext

import subprocess


# Use a provided libarchive else default to hard-coded path.
libarchivePrefix = environ.get('LIBARCHIVE_PREFIX')

includePath = f"{libarchivePrefix or '/usr'}/include"
# retreive the version number form SWIG generated file
print("includePath:", (libarchivePrefix, includePath))

cmd = [
    'awk',
    '/#define.*ARCHIVE_VERSION_NUMBER/ { if (match($0,"[[:digit:]]+")) print substr($0, RSTART,RLENGTH) }',
    f"{includePath}/archive.h"
]

p = subprocess.run(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
print("awk output:", p.stdout.decode('utf-8'))
vnum = int(p.stdout)

name = 'python-libarchive-ext'
version = '{}.{}.{}'.format(vnum // 1000000, (vnum // 1000) % 100, vnum % 100)
versrel = version
readme = 'README.rst'
repourl = 'https://github.com/Vadiml1024/python-libarchive'
repobranch = 'extended'
download_url = repourl + f'/tarball/{repobranch}'
long_description = open(readme).read()


class build_ext_extra(build_ext, object):
    """
    Extend build_ext allowing extra_compile_args and extra_link_args to be set
    on the command-line.
    """

    user_options = build_ext.user_options
    user_options.append(('extra-compile-args=', None, 'Extra arguments passed directly to the compiler'))
    user_options.append(('extra-link-args=', None, 'Extra arguments passed directly to the linker'))

    def initialize_options(self):
        build_ext.initialize_options(self)
        self.extra_compile_args = None
        self.extra_link_args = None

    def build_extension(self, ext):
        if self.extra_compile_args:
            ext.extra_compile_args.append(self.extra_compile_args)
        if self.extra_link_args:
            ext.extra_link_args.append(self.extra_link_args)
        super(build_ext_extra, self).build_extension(ext)


if libarchivePrefix:
    extra_compile_args = ['-I{0}/include'.format(libarchivePrefix)]
    extra_link_args = ['-Wl,-rpath={0}/lib'.format(libarchivePrefix)]
    environ['LDFLAGS'] = '-L{0}/lib {1}'.format(libarchivePrefix, environ.get('LDFLAGS', ''))
else:
    extra_compile_args = []
    extra_link_args = ['-l:libarchive.so.13']

__libarchive = Extension(
    name='libarchive.__libarchive',
    sources=['libarchive/_libarchive.i'],
    libraries=['archive'],
    extra_compile_args=extra_compile_args,
    extra_link_args=extra_link_args,
    include_dirs=['libarchive'],
)


setup(
    name=name,
    version=versrel,
    description='A libarchive wrapper for Python supporting password protection.',
    long_description=long_description,
    license='BSD-style license',
    platforms=['any'],
    author='Vadim Lebedev, Ben Timby, Travis Cunningham, Ryan Johnston, SmartFile',
    author_email='vadiml1024@gmail.com',
    url=repourl,
    download_url=download_url,
    packages=['libarchive'],
    classifiers=[
        'Development Status :: 4 - Beta',
        'Intended Audience :: Developers',
        'Operating System :: OS Independent',
        'Programming Language :: C',
        'Programming Language :: Python',
        'Topic :: System :: Archiving :: Compression',
        'Topic :: Software Development :: Libraries :: Python Modules',
    ],
    cmdclass={
        'build_ext': build_ext_extra,
    },
    ext_modules=[__libarchive],
)