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# Copyright (C) 2008 Jelmer Vernooij
# Copyright (C) 2008 John Carr
# Copyright (C) 2008 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
import os
import tempfile
from dulwich.server import TCPGitServer
from bzrlib.bzrdir import (
BzrDir,
)
from bzrlib.errors import (
NotBranchError,
)
from bzrlib.plugins.git.branch import (
branch_name_to_ref,
ref_to_branch_name,
)
from bzrlib.plugins.git.fetch import (
import_git_objects,
)
from bzrlib.plugins.git.mapping import (
default_mapping,
)
from bzrlib.plugins.git.object_store import (
get_object_store
)
from dulwich.server import (
Backend,
BackendRepo,
)
from dulwich.pack import (
PackData,
Pack,
)
class BzrBackend(Backend):
"""A git serve backend that can use a Bazaar repository."""
def __init__(self, transport):
self.transport = transport
self.mapping = default_mapping
def open_repository(self, path):
# FIXME: More secure path sanitization
return BzrBackendRepo(self.transport.clone(path.lstrip("/")),
self.mapping)
class BzrBackendRepo(BackendRepo):
def __init__(self, transport, mapping):
self.transport = transport
self.mapping = mapping
self.repo_dir = BzrDir.open_from_transport(self.transport)
self.repo = self.repo_dir.find_repository()
self.object_store = get_object_store(self.repo)
def get_peeled(self, name):
return self.get_refs()[name]
def get_refs(self):
"""Return a dict of all tags and branches in repository (and shas) """
ret = {}
self.repo.lock_read()
try:
for branch in self.repo_dir.list_branches():
ref = branch_name_to_ref(branch.name, "refs/heads/master")
ret[ref] = self.object_store._lookup_revision_sha1(
branch.last_revision())
assert type(ref) == str and type(ret[ref]) == str, \
"(%s) %r -> %r" % (branch.name, ref, ret[ref])
finally:
self.repo.unlock()
return ret
def apply_pack(self, refs, read):
"""Apply pack from client to current repository"""
fd, path = tempfile.mkstemp(suffix=".pack")
f = os.fdopen(fd, 'w')
f.write(read())
f.close()
pd = PackData(path)
pd.create_index_v2(path[:-5]+".idx", self.object_store.get_raw)
p = Pack(path[:-5])
heads = [k[1] for k in refs]
self.repo.lock_write()
try:
self.repo.start_write_group()
try:
import_git_objects(self.repo, self.mapping,
p.iterobjects(get_raw=self.object_store.get_raw),
self.object_store, heads)
except:
self.repo.abort_write_group()
raise
else:
self.repo.commit_write_group()
finally:
self.repo.unlock()
for oldsha, sha, ref in refs:
try:
branch_name = ref_to_branch_name(ref)
except ValueError:
# FIXME: Cope with tags!
continue
try:
target_branch = self.repo_dir.open_branch(branch_name)
except NotBranchError:
target_branch = self.repo.create_branch(branch_name)
rev_id = self.mapping.revision_id_foreign_to_bzr(sha)
target_branch.lock_write()
try:
target_branch.generate_revision_history(rev_id)
finally:
target_branch.unlock()
def fetch_objects(self, determine_wants, graph_walker, progress,
get_tagged=None):
""" yield git objects to send to client """
# If this is a Git repository, just use the existing fetch_objects implementation.
if getattr(self.repo, "fetch_objects", None) is not None:
return self.repo.fetch_objects(determine_wants, graph_walker, None, progress)[0]
wants = determine_wants(self.get_refs())
graph_walker.reset()
self.repo.lock_read()
try:
have = self.object_store.find_common_revisions(graph_walker)
return self.object_store.generate_pack_contents(have, wants)
finally:
self.repo.unlock()
def serve_git(transport, host=None, port=None, inet=False):
backend = BzrBackend(transport)
if host is None:
host = 'localhost'
if port:
server = TCPGitServer(backend, host, port)
else:
server = TCPGitServer(backend, host)
server.serve_forever()
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