/brz/remove-bazaar

# Copyright (C) 2007 Canonical Ltd

#

# 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

"""An adapter between a Git Branch and a Bazaar Branch"""

from bzrlib import (

    branch,

    config,

    revision,

    )

from bzrlib.decorators import needs_read_lock

from bzrlib.plugins.git import ids

class GitBranchConfig(config.BranchConfig):

    """BranchConfig that uses locations.conf in place of branch.conf"""

    def __init__(self, branch):

        config.BranchConfig.__init__(self, branch)

        # do not provide a BranchDataConfig

        self.option_sources = self.option_sources[0], self.option_sources[2]

    def set_user_option(self, name, value, local=False):

        """Force local to True"""

        config.BranchConfig.set_user_option(self, name, value, local=True)

class GitBranchFormat(branch.BranchFormat):

    def get_branch_description(self):

        return 'Git Branch'

class GitBranch(branch.Branch):

    """An adapter to git repositories for bzr Branch objects."""

    def __init__(self, gitdir, lockfiles):

        super(GitBranch, self).__init__()

        from bzrlib.plugins.git import git_repository

        self.bzrdir = gitdir

        self.control_files = lockfiles

        self.repository = git_repository.GitRepository(gitdir, lockfiles)

        self.base = gitdir.root_transport.base

        if '.git' not in gitdir.root_transport.list_dir('.'):

            raise errors.NotBranchError(self.base)

        self._format = GitBranchFormat()

    def lock_write(self):

        self.control_files.lock_write()

    @needs_read_lock

    def last_revision(self):

        # perhaps should escape this ?

        head_git_id = self.repository._git.get_head()

        if head_git_id is None:

            return revision.NULL_REVISION

        return ids.convert_revision_id_git_to_bzr(head_git_id)

    @needs_read_lock

    def revision_history(self):

        node = self.last_revision()

        if node == revision.NULL_REVISION:

            return []

        ancestors = self.repository.get_revision_graph(node)

        history = []

        while node is not None:

            history.append(node)

            if len(ancestors[node]) > 0:

                node = ancestors[node][0]

            else:

                node = None

        return list(reversed(history))

    def get_config(self):

        return GitBranchConfig(self)

    def lock_read(self):

        self.control_files.lock_read()

    def unlock(self):

        self.control_files.unlock()

    def get_push_location(self):

        """See Branch.get_push_location."""

        push_loc = self.get_config().get_user_option('push_location')

        return push_loc

    def set_push_location(self, location):

        """See Branch.set_push_location."""

        self.get_config().set_user_option('push_location', location,

                                          local=True)

    def supports_tags(self):

        return False