/brz/remove-bazaar

#!/usr/bin/env python

# vim: expandtab

# Copyright (C) 2011 Jelmer Vernooij <jelmer@apache.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

"""Remote helper for git for accessing bzr repositories."""

CAPABILITIES = ["fetch", "option", "push"]

import os

from bzrlib.controldir import ControlDir

from bzrlib.errors import NotBranchError, NoRepositoryPresent

from bzrlib.repository import InterRepository

from bzrlib.transport import get_transport_from_path

from bzrlib.plugins.git import (

    LocalGitProber,

    )

from bzrlib.plugins.git.dir import (

    BareLocalGitControlDirFormat,

    LocalGitControlDirFormat,

    )

from bzrlib.plugins.git.object_store import (

    get_object_store,

    )

from bzrlib.plugins.git.refs import (

    get_refs_container,

    ref_to_branch_name,

    )

from bzrlib.plugins.git.repository import (

    GitRepository,

    )

try:

    from bzrlib.plugins.fastimport import exporter as fastexporter

except ImportError:

    fastexporter = None

else:

    CAPABILITIES.append("import")

def open_remote_dir(url):

    try:

        return ControlDir.open(url)

    except NotBranchError:

        return ControlDir.create(url)

def fetch(outf, wants, shortname, remote_dir, local_dir):

    remote_repo = remote_dir.find_repository()

    local_repo = local_dir.find_repository()

    inter = InterRepository.get(remote_repo, local_repo)

    def update_refs(heads):

        ret = {}

        for (sha1, ref) in wants:

            ret[ref] = (sha1, None)

        return ret

    if (isinstance(remote_repo, GitRepository) and

        isinstance(local_repo, GitRepository)):

        lossy = False

    else:

        lossy = True

    inter.fetch_refs(update_refs, lossy=lossy)

    outf.write("\n")

def push(outf, wants, shortname, remote_dir, local_dir):

    for (src_ref, dest_ref) in wants:

        local_branch = local_dir.open_branch(ref=src_ref)

        dest_branch_name = ref_to_branch_name(dest_ref)

        if dest_branch_name == "master":

            dest_branch_name = None

        try:

            remote_branch = remote_dir.open_branch(name=dest_branch_name)

        except NotBranchError:

            remote_branch = remote_dir.create_branch(name=dest_branch_name)

        local_branch.push(remote_branch)

        outf.write("ok %s\n" % dest_ref)

    outf.write("\n")

class RemoteHelper(object):

    """Git remote helper."""

    def __init__(self, local_dir, shortname, remote_dir):

        self.local_dir = local_dir

        self.shortname = shortname

        self.remote_dir = remote_dir

        self.batchcmd = None

        self.wants = []

    def cmd_capabilities(self, outf, argv):

        outf.write("\n".join(CAPABILITIES)+"\n\n")

    def cmd_list(self, outf, argv):

        try:

            repo = self.remote_dir.find_repository()

        except NoRepositoryPresent:

            repo = self.remote_dir.create_repository()

        object_store = get_object_store(repo)

        object_store.lock_read()

        try:

            refs = get_refs_container(self.remote_dir, object_store)

            for ref, git_sha1 in refs.as_dict().iteritems():

                outf.write("%s %s\n" % (git_sha1, ref))

            outf.write("\n")

        finally:

            object_store.unlock()

    def cmd_option(self, outf, argv):

        outf.write("unsupported\n")

    def cmd_fetch(self, outf, argv):

        if self.batchcmd not in (None, "fetch"):

            raise Exception("fetch command inside other batch command")

        self.wants.append(tuple(argv[1:]))

        self.batchcmd = "fetch"

    def cmd_push(self, outf, argv):

        if self.batchcmd not in (None, "push"):

            raise Exception("push command inside other batch command")

        self.wants.append(tuple(argv[1].split(":", 1)))

        self.batchcmd = "push"

    def cmd_import(self, outf, argv):

        if fastexporter is None:

            raise Exception("install bzr-fastimport for 'import' command support")

        dest_branch_name = ref_to_branch_name(argv[1])

        if dest_branch_name == "master":

            dest_branch_name = None

        remote_branch = self.remote_dir.open_branch(name=dest_branch_name)

        exporter = fastexporter.BzrFastExporter(remote_branch,

            outf=outf, ref=argv[1],

            checkpoint=None, import_marks_file=None,

            export_marks_file=None, revision=None,

            verbose=None, plain_format=True,

            rewrite_tags=False)

        exporter.run()

    commands = {

        "capabilities": cmd_capabilities,

        "list": cmd_list,

        "option": cmd_option,

        "fetch": cmd_fetch,

        "push": cmd_push,

        "import": cmd_import,

        }

    def process(self, inf, outf):

        while True:

            l = inf.readline()

            if not l:

                break

            self.process_line(l, outf)

    def process_line(self, l, outf):

        argv = l.strip().split()

        if argv == []:

            if self.batchcmd == "fetch":

                fetch(outf, self.wants, self.shortname, self.remote_dir, self.local_dir)

            elif self.batchcmd == "push":

                push(outf, self.wants, self.shortname, self.remote_dir, self.local_dir)

            elif self.batchcmd is None:

                return

            else:

                raise AssertionError("invalid batch %r" % self.batchcmd)

            self.batchcmd = None

        else:

            try:

               self.commands[argv[0]](self, outf, argv)

            except KeyError:

               raise Exception("Unknown remote command %r" % argv)

        outf.flush()

def open_local_dir():

    try:

        git_path = os.environ["GIT_DIR"]

    except KeyError:

        git_transport = get_transport_from_path(".")

        git_format = LocalGitProber().probe_transport(git_transport)

    else:

        if git_path.endswith("/.git"):

            git_format = LocalGitControlDirFormat()

            git_path = git_path[:-4]

        else:

            git_format = BareLocalGitControlDirFormat()

        git_transport = get_transport_from_path(git_path)

    return git_format.open(git_transport)