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# Copyright (C) 2009-2010 Jelmer Vernooij <jelmer@samba.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
"""Push implementation that simply prints message saying push is not supported."""
from __future__ import absolute_import
from dulwich.objects import ZERO_SHA
from dulwich.walk import Walker
from bzrlib import (
errors,
ui,
)
from bzrlib.repository import (
InterRepository,
)
from bzrlib.revision import (
NULL_REVISION,
)
from bzrlib.plugins.git.errors import (
NoPushSupport,
)
from bzrlib.plugins.git.object_store import (
get_object_store,
)
from bzrlib.plugins.git.repository import (
GitRepository,
LocalGitRepository,
GitRepositoryFormat,
)
from bzrlib.plugins.git.remote import (
RemoteGitRepository,
)
from bzrlib.plugins.git.unpeel_map import (
UnpeelMap,
)
class MissingObjectsIterator(object):
"""Iterate over git objects that are missing from a target repository.
"""
def __init__(self, store, source, pb=None):
"""Create a new missing objects iterator.
"""
self.source = source
self._object_store = store
self._pending = []
self.pb = pb
def import_revisions(self, revids, lossy):
"""Import a set of revisions into this git repository.
:param revids: Revision ids of revisions to import
:param lossy: Whether to not roundtrip bzr metadata
"""
for i, revid in enumerate(revids):
if self.pb:
self.pb.update("pushing revisions", i, len(revids))
git_commit = self.import_revision(revid, lossy)
yield (revid, git_commit)
def import_revision(self, revid, lossy):
"""Import a revision into this Git repository.
:param revid: Revision id of the revision
:param roundtrip: Whether to roundtrip bzr metadata
"""
tree = self._object_store.tree_cache.revision_tree(revid)
rev = self.source.get_revision(revid)
commit = None
for path, obj, ie in self._object_store._revision_to_objects(rev, tree, lossy):
if obj.type_name == "commit":
commit = obj
self._pending.append((obj, path))
if commit is None:
raise AssertionError("no commit object generated for revision %s" %
revid)
return commit.id
def __len__(self):
return len(self._pending)
def __iter__(self):
return iter(self._pending)
class InterToGitRepository(InterRepository):
"""InterRepository that copies into a Git repository."""
_matching_repo_format = GitRepositoryFormat()
def __init__(self, source, target):
super(InterToGitRepository, self).__init__(source, target)
self.mapping = self.target.get_mapping()
self.source_store = get_object_store(self.source, self.mapping)
@staticmethod
def _get_repo_format_to_test():
return None
def copy_content(self, revision_id=None, pb=None):
"""See InterRepository.copy_content."""
self.fetch(revision_id, pb, find_ghosts=False)
def fetch_refs(self, update_refs, lossy):
"""Fetch possibly roundtripped revisions into the target repository
and update refs.
:param update_refs: Generate refs to fetch. Receives dictionary
with old refs (git shas), returns dictionary of new names to
git shas.
:param lossy: Whether to roundtrip
:return: old refs, new refs
"""
raise NotImplementedError(self.fetch_refs)
def search_missing_revision_ids(self,
find_ghosts=True, revision_ids=None, if_present_ids=None,
limit=None):
git_shas = []
todo = []
if revision_ids:
todo.extend(revision_ids)
if if_present_ids:
todo.extend(revision_ids)
self.source_store.lock_read()
try:
for revid in revision_ids:
if revid == NULL_REVISION:
continue
git_sha = self.source_store._lookup_revision_sha1(revid)
git_shas.append(git_sha)
walker = Walker(self.source_store,
include=git_shas, exclude=[sha for sha in self.target.bzrdir.get_refs_container().as_dict().values() if sha != ZERO_SHA])
missing_revids = set()
for entry in walker:
for (kind, type_data) in self.source_store.lookup_git_sha(entry.commit.id):
if kind == "commit":
missing_revids.add(type_data[0])
finally:
self.source_store.unlock()
return self.source.revision_ids_to_search_result(missing_revids)
class InterToLocalGitRepository(InterToGitRepository):
"""InterBranch implementation between a Bazaar and a Git repository."""
def __init__(self, source, target):
super(InterToLocalGitRepository, self).__init__(source, target)
self.target_store = self.target.bzrdir._git.object_store
self.target_refs = self.target.bzrdir._git.refs
def _commit_needs_fetching(self, sha_id):
try:
return (sha_id not in self.target_store)
except errors.NoSuchRevision:
# Ghost, can't push
return False
def _revision_needs_fetching(self, sha_id, revid):
if revid == NULL_REVISION:
return False
if sha_id is None:
try:
sha_id = self.source_store._lookup_revision_sha1(revid)
except KeyError:
return False
return self._commit_needs_fetching(sha_id)
def missing_revisions(self, stop_revisions):
"""Find the revisions that are missing from the target repository.
:param stop_revisions: Revisions to check for (tuples with
Git SHA1, bzr revid)
:return: sequence of missing revisions, in topological order
:raise: NoSuchRevision if the stop_revisions are not present in
the source
"""
revid_sha_map = {}
stop_revids = []
for (sha1, revid) in stop_revisions:
if sha1 is not None and revid is not None:
revid_sha_map[revid] = sha1
stop_revids.append(revid)
elif sha1 is not None:
if self._commit_needs_fetching(sha1):
for (kind, (revid, tree_sha, verifiers)) in self.source_store.lookup_git_sha(sha1):
revid_sha_map[revid] = sha1
stop_revids.append(revid)
else:
assert revid is not None
stop_revids.append(revid)
missing = set()
graph = self.source.get_graph()
pb = ui.ui_factory.nested_progress_bar()
try:
while stop_revids:
new_stop_revids = []
for revid in stop_revids:
sha1 = revid_sha_map.get(revid)
if (not revid in missing and
self._revision_needs_fetching(sha1, revid)):
missing.add(revid)
new_stop_revids.append(revid)
stop_revids = set()
parent_map = graph.get_parent_map(new_stop_revids)
for parent_revids in parent_map.itervalues():
stop_revids.update(parent_revids)
pb.update("determining revisions to fetch", len(missing))
finally:
pb.finished()
return graph.iter_topo_order(missing)
def _get_target_bzr_refs(self):
"""Return a dictionary with references.
:return: Dictionary with reference names as keys and tuples
with Git SHA, Bazaar revid as values.
"""
bzr_refs = {}
refs = {}
for k in self.target._git.refs.allkeys():
v = self.target._git.refs.read_ref(k)
try:
for (kind, type_data) in self.source_store.lookup_git_sha(v):
if kind == "commit" and self.source.has_revision(type_data[0]):
revid = type_data[0]
break
else:
revid = None
except KeyError:
revid = None
bzr_refs[k] = (v, revid)
return bzr_refs
def fetch_refs(self, update_refs, lossy):
if not lossy and not self.mapping.roundtripping:
raise NoPushSupport()
self.source_store.lock_read()
try:
old_refs = self._get_target_bzr_refs()
new_refs = update_refs(old_refs)
revidmap = self.fetch_objects(
[(git_sha, bzr_revid) for (git_sha, bzr_revid) in new_refs.values() if git_sha is None or not git_sha.startswith('ref:')], lossy=lossy)
for name, (gitid, revid) in new_refs.iteritems():
if gitid is None:
try:
gitid = revidmap[revid][0]
except KeyError:
gitid = self.source_store._lookup_revision_sha1(revid)
assert len(gitid) == 40 or gitid.startswith('ref: ')
self.target_refs[name] = gitid
finally:
self.source_store.unlock()
return revidmap, old_refs, new_refs
def fetch_objects(self, revs, lossy):
if not lossy and not self.mapping.roundtripping:
raise NoPushSupport()
self.source_store.lock_read()
try:
todo = list(self.missing_revisions(revs))
revidmap = {}
pb = ui.ui_factory.nested_progress_bar()
try:
object_generator = MissingObjectsIterator(
self.source_store, self.source, pb)
for (old_revid, git_sha) in object_generator.import_revisions(
todo, lossy=lossy):
if lossy:
new_revid = self.mapping.revision_id_foreign_to_bzr(git_sha)
else:
new_revid = old_revid
try:
self.mapping.revision_id_bzr_to_foreign(old_revid)
except errors.InvalidRevisionId:
refname = self.mapping.revid_as_refname(old_revid)
self.target_refs[refname] = git_sha
revidmap[old_revid] = (git_sha, new_revid)
self.target_store.add_objects(object_generator)
return revidmap
finally:
pb.finished()
finally:
self.source_store.unlock()
def fetch(self, revision_id=None, pb=None, find_ghosts=False,
fetch_spec=None, mapped_refs=None):
if not self.mapping.roundtripping:
raise NoPushSupport()
if mapped_refs is not None:
stop_revisions = mapped_refs
elif revision_id is not None:
stop_revisions = [(None, revision_id)]
elif fetch_spec is not None:
recipe = fetch_spec.get_recipe()
if recipe[0] in ("search", "proxy-search"):
stop_revisions = [(None, revid) for revid in recipe[1]]
else:
raise AssertionError("Unsupported search result type %s" % recipe[0])
else:
stop_revisions = [(None, revid) for revid in self.source.all_revision_ids()]
self.fetch_objects(stop_revisions, lossy=False)
@staticmethod
def is_compatible(source, target):
"""Be compatible with GitRepository."""
return (not isinstance(source, GitRepository) and
isinstance(target, LocalGitRepository))
class InterToRemoteGitRepository(InterToGitRepository):
def fetch_refs(self, update_refs, lossy):
"""Import the gist of the ancestry of a particular revision."""
if not lossy and not self.mapping.roundtripping:
raise NoPushSupport()
unpeel_map = UnpeelMap.from_repository(self.source)
revidmap = {}
def determine_wants(old_refs):
ret = {}
self.old_refs = dict([(k, (v, None)) for (k, v) in old_refs.iteritems()])
self.new_refs = update_refs(self.old_refs)
for name, (gitid, revid) in self.new_refs.iteritems():
if gitid is None:
git_sha = self.source_store._lookup_revision_sha1(revid)
ret[name] = unpeel_map.re_unpeel_tag(git_sha, old_refs.get(name))
else:
ret[name] = gitid
return ret
self.source_store.lock_read()
try:
new_refs = self.target.send_pack(determine_wants,
self.source_store.generate_lossy_pack_contents)
finally:
self.source_store.unlock()
# FIXME: revidmap?
return revidmap, self.old_refs, self.new_refs
@staticmethod
def is_compatible(source, target):
"""Be compatible with GitRepository."""
return (not isinstance(source, GitRepository) and
isinstance(target, RemoteGitRepository))
|