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#! /usr/bin/env python

import os
import subprocess

from setuptools import setup, find_packages
from distutils.command.sdist import sdist

class eo_sdist(sdist):
    def run(self):
        if os.path.exists('VERSION'):
            os.remove('VERSION')
        version = get_version()
        version_file = open('VERSION', 'w')
        version_file.write(version)
        version_file.close()
        sdist.run(self)
        if os.path.exists('VERSION'):
            os.remove('VERSION')


def get_version():
    '''Use the VERSION, if absent generates a version with git describe, if not
       tag exists, take 0.0- and add the length of the commit log.
    '''
    if os.path.exists('VERSION'):
        with open('VERSION', 'r') as v:
            return v.read()
    if os.path.exists('.git'):
        p = subprocess.Popen(['git','describe','--dirty=.dirty','--match=v*'],
                stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        result = p.communicate()[0]
        if p.returncode == 0:
            result = result.decode('ascii').strip()[1:] # strip spaces/newlines and initial v
            if '-' in result: # not a tagged version
                real_number, commit_count, commit_hash = result.split('-', 2)
                version = '%s.post%s+%s' % (real_number, commit_count, commit_hash)
            else:
                version = result
            return version
        else:
            return '0.0.post%s' % len(
                    subprocess.check_output(
                            ['git', 'rev-list', 'HEAD']).splitlines())
    return '0.0'


setup(
        name='passerelle-grandlyon-cartads-cs',
        version=get_version(),
        author="Entr'ouvert",
        author_email="info@entrouvert.com",
        packages=find_packages(),
        cmdclass={
            'sdist': eo_sdist,
            }
        )