#!/usr/bin/env python

import sys, glob, os
from distutils.core import setup

from stgit import version

def __version_to_list(version):
    """Convert a version string to a list of numbers or strings
    """
    ver_list = []
    for p in version.split('.'):
        try:
            n = int(p)
        except ValueError:
            n = p
        ver_list.append(n)
    return ver_list

def __check_min_version(min_ver, ver):
    """Check whether ver is greater or equal to min_ver
    """
    min_ver_list = __version_to_list(min_ver)
    ver_list = __version_to_list(ver)
    return min_ver_list <= ver_list

def __check_python_version():
    """Check the minimum Python version
    """
    pyver = '.'.join(map(lambda x: str(x), sys.version_info))
    if not __check_min_version(version.python_min_ver, pyver):
        print >> sys.stderr, 'Python version %s or newer required. Found %s' \
              % (version.python_min_ver, pyver)
        sys.exit(1)

def __check_git_version():
    """Check the minimum GIT version
    """
    from stgit.run import Run
    gitver = Run('git', '--version').output_one_line().split()[2]
    if not __check_min_version(version.git_min_ver, gitver):
        print >> sys.stderr, 'GIT version %s or newer required. Found %s' \
              % (version.git_min_ver, gitver)
        sys.exit(1)

def __run_setup():
    setup(name = 'stgit',
          version = version.version,
          license = 'GPLv2',
          author = 'Catalin Marinas',
          author_email = 'catalin.marinas@gmail.com',
          url = 'http://www.procode.org/stgit/',
          description = 'Stacked GIT',
          long_description = 'Push/pop utility on top of GIT',
          scripts = ['stg'],
          packages = ['stgit', 'stgit.commands', 'stgit.lib'],
          data_files = [
            ('share/stgit/templates', glob.glob('templates/*.tmpl')),
            ('share/stgit/examples', glob.glob('examples/*.tmpl')),
            ('share/stgit/examples', ['examples/gitconfig']),
            ('share/stgit/contrib', ['contrib/stgbashprompt.sh']),
            ('share/stgit/completion', ['stgit-completion.bash'])
            ])

# Check the minimum versions required
if sys.argv[1] in ['install', 'build']:
    __check_python_version()
    __check_git_version()

# ensure readable template files
old_mask = os.umask(0022)

version.write_builtin_version()
__run_setup()

# restore the old mask
os.umask(old_mask)