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#!/usr/bin/python
# -*- coding: utf-8 -*-
#
# (C) 2006 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
#
"""Import a new upstream version"""

import sys
import os
import tempfile
import re
import glob
import git_buildpackage
from git_buildpackage.git_utils import (GitRepositoryError,
                                        GitRepository, 
                                        sanitize_version)
from git_buildpackage.config import GBPOptionParser


def cleanupTmpTree(tree):
    """remove a tree of temporary files"""
    git_buildpackage.RemoveTree(tree)()


def unpackOrig(tgz):
    """unpack a .orig.tar.gz"""
    try:
        unpackTGZ = git_buildpackage.UnpackTGZ(tgz, tempfile.mkdtemp(dir='../'))
        unpackTGZ()
    except git_buildpackage.CommandExecFailed:
        print "Unpacking of %s failed" % (tgz,)
        cleanupTmpTree(unpackTGZ.dir)
        return
    return unpackTGZ.dir


def get_version(tgz):
    """get the version from the filename of a .orig.tar.gz"""
    origre = re.compile('^[a-z\d-]+_(?P<version>[a-z\d\.\~\-]+)\.orig\.tar\.gz')
    m = origre.match(os.path.basename(tgz))
    if m:
        return m.group('version')    

def main(argv):
    parser = GBPOptionParser(command=os.path.basename(argv[0]), prefix='',
                           usage='%prog [-u version] /path/to/upstream-version.tar.gz')

    parser.add_option("-u", "--upstreamversion", dest="version",
                      help="Upstream Version")
    parser.add_option("-v", "--verbose", action="store_true", dest="verbose", default=False,
                      help="verbose command execution")
    parser.add_option("--no-merge", dest='merge', action="store_false", default=True,
                      help="after import dont do any merging to another branch")
    parser.add_config_file_option(option_name="debian-branch", dest='debian',
                      help="branch the debian patch is being developed on, default is '%(debian-branch)s'")
    parser.add_config_file_option(option_name="upstream-branch", dest="upstream",
                      help="upstream branch, default is '%(upstream-branch)s'")
    parser.add_config_file_option(option_name="sign-tags", dest="sign_tags",
                      help="sign git tags", action="store_true")
    parser.add_config_file_option(option_name="keyid", dest="keyid",
                      help="GPG keyid to sign tags with")
    (options, args) = parser.parse_args(argv[1:])

    gitCheckoutUpstream = git_buildpackage.GitCheckoutBranch(options.upstream)
    gitCheckoutMaster = git_buildpackage.GitCheckoutBranch(options.debian)
    gitShowBranch = git_buildpackage.GitShowBranch()
    gitPullUpstream = git_buildpackage.GitPull('.', options.upstream)

    if options.verbose:
        git_buildpackage.Command.verbose = True

    if len(args) != 1:
        parser.print_help()
        return 1
    else:
        tgz = args[0]

    try:
        repo=GitRepository('.')
    except GitRepositoryError:
        print >>sys.stderr,"%s is not a git repository" % (os.path.abspath('.'))
        return 1

    if not repo.has_branch(options.upstream):
        print >>sys.stderr, """
Repository does not have branch '%s' for upstream sources. If there is none see
/usr/share/doc/git-buildpackage/manual-html/gbp.import.convert.html on howto
create it otherwise use --upstream-branch to specify it.
"""  % options.upstream
        return 1

    if options.version:
        version = options.version
    else:
        version = get_version(tgz)
    if version:
        print "Upstream version is %s" % (version,)
    else:
        print >>sys.stderr,"Cannot determine upstream version from %s - use -u" % (tgz,)
        parser.print_help()
        return 1

    (ret, out) = repo.is_clean()
    if not ret:
        print >>sys.stderr, "Repository has uncommitted changes, commit them first: "
        print >>sys.stderr, out
        return 1

    tmpdir = unpackOrig(tgz)
    if not tmpdir:
        return 1
    else:
        if options.verbose:
            print "Unpacked orig to %s" % tmpdir
        origdir=glob.glob(tmpdir+'/*')[0]
  
    try:
        print "Importing %s to upstream branch..." % tgz
        gitCheckoutUpstream()
        gitShowBranch()
        git_buildpackage.GitLoadDirs()(origdir)
        git_buildpackage.GitTag(options.sign_tags, options.keyid)(sanitize_version(version))
   
        if options.merge:
            print "Merging to %s" % (options.debian,)
            gitCheckoutMaster()
            gitShowBranch()
            gitPullUpstream()
            git_buildpackage.Dch("%s-1" % (version,), 'New Upstream Version')()
    except git_buildpackage.CommandExecFailed:
        print >>sys.stderr, "Import of %s failed" % (tgz,)
        cleanupTmpTree(tmpdir)
        return 1
    cleanupTmpTree(tmpdir)

    print "Merged version %s of %s into ." % (version, tgz)
    return 0

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

# vim:et:ts=4:sw=4: