# vim: set fileencoding=utf-8 :
#
# (C) 2009,2010 Guido Guenther <agx@sigxcpu.org>
#    This program is free software; you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation; either version 2 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program; if not, write to the Free Software
#    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
# inspired by dom-git-checkout
#
"""clone a repo and set it up for gbp"""

import ConfigParser
import sys
import os, os.path
from gbp.config import (GbpOptionParser, GbpOptionGroup)
from gbp.git import GitRepositoryError
from gbp.errors import GbpError
import gbp.log
try:
    from gbp.deb.git import DebianGitRepository as GitRepository
except ImportError:
    from gbp.rpm.git import RpmGitRepository as GitRepository


def build_parser(name):
    try:
        parser = GbpOptionParser(command=os.path.basename(name), prefix='',
                                 usage='%prog [options] repository - clone a remote repository')
    except ConfigParser.ParsingError as err:
        gbp.log.err(err)
        return None

    branch_group = GbpOptionGroup(parser, "branch options", "branch tracking and layout options")
    parser.add_option_group(branch_group)

    branch_group.add_option("--all", action="store_true", dest="all", default=False,
                            help="track all branches, not only debian and upstream")
    branch_group.add_config_file_option(option_name="upstream-branch", dest="upstream_branch")
    branch_group.add_config_file_option(option_name="debian-branch", dest="packaging_branch")
    branch_group.add_config_file_option(option_name="packaging-branch", dest="packaging_branch")
    branch_group.add_boolean_config_file_option(option_name="pristine-tar", dest="pristine_tar")
    branch_group.add_option("--depth", action="store", dest="depth", default=0,
                            help="git history depth (for creating shallow clones)")

    parser.add_option("-v", "--verbose", action="store_true", dest="verbose", default=False,
                      help="verbose command execution")
    parser.add_config_file_option(option_name="color", dest="color", type='tristate')
    parser.add_config_file_option(option_name="color-scheme",
                                  dest="color_scheme")
    return parser


def parse_args (argv):
    parser = build_parser(argv[0])
    if not parser:
        return None, None

    (options, args) = parser.parse_args(argv)
    gbp.log.setup(options.color, options.verbose, options.color_scheme)
    return (options, args)


def main(argv):
    retval = 0

    (options, args) = parse_args(argv)
    if not options:
        return 1

    if len(args) < 2:
        gbp.log.err("Need a repository to clone.")
        return 1
    else:
        source = args[1]

    clone_to, auto_name = (os.path.curdir, True) if len(args) < 3 else (args[2], False)
    try:
        GitRepository(clone_to)
        gbp.log.err("Can't run inside a git repository.")
        return 1
    except GitRepositoryError:
        pass

    try:
        repo = GitRepository.clone(clone_to, source, options.depth,
                                   auto_name=auto_name)
        os.chdir(repo.path)

        # Reparse the config files of the cloned repository so we pick up the
        # branch information from there:
        (options, args) = parse_args(argv)

        # Track all branches:
        if options.all:
            remotes = repo.get_remote_branches()
            for remote in remotes:
                local = remote.replace("origin/", "", 1)
                if not repo.has_branch(local) and \
                    local != "HEAD":
                        repo.create_branch(local, remote)
        else: # only track gbp's default branches
            branches = [ options.packaging_branch, options.upstream_branch ]
            if options.pristine_tar:
                branches += [ repo.pristine_tar_branch ]
            gbp.log.debug('Will track branches: %s' % branches)
            for branch in branches:
                remote = 'origin/%s' % branch
                if repo.has_branch(remote, remote=True) and \
                    not repo.has_branch(branch):
                        repo.create_branch(branch, remote)

        repo.set_branch(options.packaging_branch)

    except GitRepositoryError as err:
        gbp.log.err("Git command failed: %s" % err)
        retval = 1
    except GbpError as err:
        if len(err.__str__()):
            gbp.log.err(err)
        retval = 1

    return retval

if __name__ == '__main__':
    sys.exit(main(sys.argv))

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