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#!/usr/bin/env python
"""Catalyst is a release building tool used by Gentoo Linux"""

import codecs as _codecs
from distutils.core import setup as _setup, Command as _Command
from email.utils import parseaddr as _parseaddr
import os as _os

from catalyst import __version__, __maintainer__
from catalyst.version import set_release_version as _set_release_version
from catalyst.version import get_version as _get_version


_this_dir = _os.path.dirname(__file__)
_package_name = 'catalyst'
_maintainer_name, _maintainer_email = _parseaddr(__maintainer__)


def _posix_path(path):
    """Convert a native path to a POSIX path

    Distutils wants all paths to be written in the Unix convention
    (i.e. slash-separated) [1], so that's what we'll do here.

    [1]: https://docs.python.org/2/distutils/setupscript.html
    """
    if _os.path.sep != '/':
        return path.replace(_os.path.sep, '/')
    return path


def _files(prefix, root):
    """Iterate through all the file paths under `root`

    Yielding `(target_dir, (file_source_paths, ...))` tuples.
    """
    for dirpath, _dirnames, filenames in _os.walk(root):
        reldir = _os.path.relpath(dirpath, root)
        install_directory = _posix_path(
            _os.path.join(prefix, reldir))
        file_source_paths = [
            _posix_path(_os.path.join(dirpath, filename))
            for filename in filenames]
        yield (install_directory, file_source_paths)


_data_files = [('/etc/catalyst', ['etc/catalyst.conf', 'etc/catalystrc']),
               ('/usr/share/man/man1', ['files/catalyst.1']),
               ('/usr/share/man/man5',
                ['files/catalyst-config.5', 'files/catalyst-spec.5'])
               ]
_data_files.extend(_files('share/catalyst/arch', 'arch'))
_data_files.extend(_files('share/catalyst/livecd', 'livecd'))
_data_files.extend(_files('share/catalyst/targets', 'targets'))


class set_version(_Command):
    '''Saves the specified release version information
    '''
    description = "hardcode script's version using VERSION from environment"
    user_options = []  # [(long_name, short_name, desc),]

    def initialize_options(self):
        pass

    def finalize_options(self):
        pass

    def run(self):
        # pylint: disable=global-statement
        global __version__
        try:
            version = _os.environ['VERSION']
        except KeyError:
            print("Try setting 'VERSION=x.y.z' on the command line... Aborting")
            return
        _set_release_version(version)
        __version__ = _get_version()
        print("Version set to:\n", __version__)


_setup(
    name=_package_name,
    version=__version__,
    maintainer=_maintainer_name,
    maintainer_email=_maintainer_email,
    url='https://wiki.gentoo.org/wiki/Catalyst',
    download_url='http://distfiles.gentoo.org/distfiles/{0}-{1}.tar.bz2'.format(
        _package_name, __version__),
    license='GNU General Public License (GPL)',
    platforms=['all'],
    description=__doc__,
    long_description=_codecs.open(
        _os.path.join(_this_dir, 'README'), 'r', 'utf-8').read(),
    classifiers=[
        'Development Status :: 5 - Production/Stable',
        'License :: OSI Approved :: GNU General Public License v2 or later (GPLv2+)',
        'Intended Audience :: System Administrators',
        'Operating System :: POSIX',
        'Topic :: System :: Archiving :: Packaging',
        'Topic :: System :: Installation/Setup',
        'Topic :: System :: Software Distribution',
        'Programming Language :: Python :: 3',
        'Programming Language :: Python :: 3.8',
    ],
    scripts=['bin/{0}'.format(_package_name)],
    packages=[
        _package_name,
        '{0}.base'.format(_package_name),
        '{0}.targets'.format(_package_name),
    ],
    data_files=_data_files,
    provides=[_package_name],
    cmdclass={
        'set_version': set_version
    },
)