/brz/remove-bazaar

# Copyright (C) 2007 Canonical Ltd

# Copyright (C) 2008-2009 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

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

from bzrlib import (

    errors,

    inventory,

    repository,

    revision,

    revisiontree,

    )

from bzrlib.foreign import (

    ForeignRepository,

    )

from bzrlib.plugins.git.commit import (

    GitCommitBuilder,

    )

from bzrlib.plugins.git.mapping import (

    default_mapping,

    foreign_git,

    mapping_registry,

    )

from bzrlib.plugins.git.tree import (

    GitRevisionTree,

    )

from bzrlib.plugins.git.versionedfiles import (

    GitRevisions,

    GitTexts,

    )

from dulwich.objects import (

    Commit,

    Tag,

    )

class GitRepository(ForeignRepository):

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

    _serializer = None

    _commit_builder_class = GitCommitBuilder

    vcs = foreign_git

    chk_bytes = None

    def __init__(self, gitdir, lockfiles):

        ForeignRepository.__init__(self, GitRepositoryFormat(), gitdir, lockfiles)

        from bzrlib.plugins.git import fetch, push

        for optimiser in [fetch.InterRemoteGitNonGitRepository,

                          fetch.InterLocalGitNonGitRepository,

                          fetch.InterGitGitRepository,

                          push.InterToLocalGitRepository,

                          push.InterToRemoteGitRepository]:

            repository.InterRepository.register_optimiser(optimiser)

    def is_shared(self):

        return False

    def supports_rich_root(self):

        return True

    def _warn_if_deprecated(self, branch=None): # for bzr < 2.4

        # This class isn't deprecated

        pass

    def get_mapping(self):

        return default_mapping

    def make_working_trees(self):

        return not self._git.bare

    def revision_graph_can_have_wrong_parents(self):

        return False

    def dfetch(self, source, stop_revision):

        interrepo = repository.InterRepository.get(source, self)

        return interrepo.dfetch(stop_revision)

    def determine_wants_revids_and_tags(self, revids):

        from dulwich.protocol import (

            ZERO_SHA,

            )

        from bzrlib.plugins.git.refs import extract_tags

        wants = []

        for revid in revids:

            git_sha, mapping = self.lookup_bzr_revision_id(revid)

            wants.append(git_sha)

        def determine_wants(heads):

            potential = wants + [v[0] for v in extract_tags(heads).itervalues()]

            # FIXME: What about already present revisions?

            return [r for r in potential if r != ZERO_SHA]

        return determine_wants

class LocalGitRepository(GitRepository):

    """Git repository on the file system."""

    def __init__(self, gitdir, lockfiles):

        GitRepository.__init__(self, gitdir, lockfiles)

        self.base = gitdir.root_transport.base

        self._git = gitdir._git

        self.signatures = None

        self.revisions = GitRevisions(self, self._git.object_store)

        self.inventories = None

        self.texts = GitTexts(self)

    def _iter_revision_ids(self):

        mapping = self.get_mapping()

        for sha in self._git.object_store:

            o = self._git.object_store[sha]

            if not isinstance(o, Commit):

                continue

            rev, roundtrip_revid, verifiers = mapping.import_commit(o,

                self.lookup_foreign_revision_id)

            yield o.id, rev.revision_id, roundtrip_revid

    def all_revision_ids(self):

        ret = set([])

        for git_sha, revid, roundtrip_revid in self._iter_revision_ids():

            ret.add(revid)

            if roundtrip_revid:

                ret.add(roundtrip_revid)

        return ret

    def get_parent_map(self, revids):

        parent_map = {}

        for revision_id in revids:

            assert isinstance(revision_id, str)

            if revision_id == revision.NULL_REVISION:

                parent_map[revision_id] = ()

                continue

            hexsha, mapping = self.lookup_bzr_revision_id(revision_id)

            try:

                commit = self._git[hexsha]

            except KeyError:

                continue

            parents = [

                self.lookup_foreign_revision_id(p, mapping)

                for p in commit.parents]

            if parents == []:

                parents = [revision.NULL_REVISION]

            parent_map[revision_id] = tuple(parents)

        return parent_map

    def get_ancestry(self, revision_id, topo_sorted=True):

        """See Repository.get_ancestry().

        """

        if revision_id is None:

            return [None, revision.NULL_REVISION] + self._all_revision_ids()

        assert isinstance(revision_id, str)

        ancestry = []

        graph = self.get_graph()

        for rev, parents in graph.iter_ancestry([revision_id]):

            ancestry.append(rev)

        if revision.NULL_REVISION in ancestry:

            ancestry.remove(revision.NULL_REVISION)

        ancestry.reverse()

        return [None] + ancestry

    def get_signature_text(self, revision_id):

        raise errors.NoSuchRevision(self, revision_id)

    def pack(self, hint=None, clean_obsolete_packs=False):

        self._git.object_store.pack_loose_objects()

    def lookup_foreign_revision_id(self, foreign_revid, mapping=None):

        """Lookup a revision id.

        """

        assert type(foreign_revid) is str

        if mapping is None:

            mapping = self.get_mapping()

        from dulwich.protocol import (

            ZERO_SHA,

            )

        if foreign_revid == ZERO_SHA:

            return revision.NULL_REVISION

        commit = self._git[foreign_revid]

        while isinstance(commit, Tag):

            commit = self._git[commit.object[1]]

        rev, roundtrip_revid, verifiers = mapping.import_commit(commit,

            lambda x: None)

        # FIXME: check testament before doing this?

        if roundtrip_revid:

            return roundtrip_revid

        else:

            return rev.revision_id

    def has_signature_for_revision_id(self, revision_id):

        return False

    def lookup_bzr_revision_id(self, bzr_revid, mapping=None):

        try:

            return mapping_registry.revision_id_bzr_to_foreign(bzr_revid)

        except errors.InvalidRevisionId:

            if mapping is None:

                mapping = self.get_mapping()

            try:

                return (self._git.refs[mapping.revid_as_refname(bzr_revid)], mapping)

            except KeyError:

                # Update refs from Git commit objects

                # FIXME: Hitting this a lot will be very inefficient...

                for git_sha, revid, roundtrip_revid in self._iter_revision_ids():

                    if not roundtrip_revid:

                        continue

                    refname = mapping.revid_as_refname(roundtrip_revid)

                    self._git.refs[refname] = git_sha

                    if roundtrip_revid == bzr_revid:

                        return git_sha, mapping

                raise errors.NoSuchRevision(self, bzr_revid)

    def get_revision(self, revision_id):

        if not isinstance(revision_id, str):

            raise errors.InvalidRevisionId(revision_id, self)

        git_commit_id, mapping = self.lookup_bzr_revision_id(revision_id)

        try:

            commit = self._git[git_commit_id]

        except KeyError:

            raise errors.NoSuchRevision(self, revision_id)

        revision, roundtrip_revid, verifiers = mapping.import_commit(

            commit, self.lookup_foreign_revision_id)

        assert revision is not None

        # FIXME: check verifiers ?

        if roundtrip_revid:

            revision.revision_id = roundtrip_revid

        return revision

    def has_revision(self, revision_id):

        """See Repository.has_revision."""

        if revision_id == revision.NULL_REVISION:

            return True

        try:

            git_commit_id, mapping = self.lookup_bzr_revision_id(revision_id)

        except errors.NoSuchRevision:

            return False

        return (git_commit_id in self._git)

    def has_revisions(self, revision_ids):

        """See Repository.has_revisions."""

        return set(filter(self.has_revision, revision_ids))

    def get_revisions(self, revids):

        """See Repository.get_revisions."""

        return [self.get_revision(r) for r in revids]

    def revision_trees(self, revids):

        """See Repository.revision_trees."""

        for revid in revids:

            yield self.revision_tree(revid)

    def revision_tree(self, revision_id):

        """See Repository.revision_tree."""

        revision_id = revision.ensure_null(revision_id)

        if revision_id == revision.NULL_REVISION:

            inv = inventory.Inventory(root_id=None)

            inv.revision_id = revision_id

            return revisiontree.RevisionTree(self, inv, revision_id)

        return GitRevisionTree(self, revision_id)

    def get_inventory(self, revision_id):

        assert revision_id != None

        return self.revision_tree(revision_id).inventory

    def set_make_working_trees(self, trees):

        raise NotImplementedError(self.set_make_working_trees)

    def fetch_objects(self, determine_wants, graph_walker, resolve_ext_ref,

        progress=None):

        return self._git.fetch_objects(determine_wants, graph_walker, progress)

    def _get_versioned_file_checker(self, text_key_references=None, ancestors=None):

        return GitVersionedFileChecker(self,

            text_key_references=text_key_references, ancestors=ancestors)

class GitVersionedFileChecker(repository._VersionedFileChecker):

    file_ids = []

    def _check_file_version_parents(self, texts, progress_bar):

        return {}, []

class GitRepositoryFormat(repository.RepositoryFormat):

    """Git repository format."""

    supports_tree_reference = False

    rich_root_data = True

    supports_leaving_lock = False

    fast_deltas = True

    supports_funky_characters = True

    supports_external_lookups = False

    supports_full_versioned_files = False

    @property

    def _matchingbzrdir(self):

        from bzrlib.plugins.git.dir import LocalGitControlDirFormat

        return LocalGitControlDirFormat()

    def get_format_description(self):

        return "Git Repository"

    def initialize(self, controldir, shared=False, _internal=False):

        from bzrlib.plugins.git.dir import GitDir

        if not isinstance(controldir, GitDir):

            raise errors.UninitializableFormat(self)

        return controldir.open_repository()

    def check_conversion_target(self, target_repo_format):

        return target_repo_format.rich_root_data

    def get_foreign_tests_repository_factory(self):

        from bzrlib.plugins.git.tests.test_repository import (

            ForeignTestsRepositoryFactory,

            )

        return ForeignTestsRepositoryFactory()

    def network_name(self):

        return "git"