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# Copyright (C) 2007 Canonical Ltd
 
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# This program is free software; you can redistribute it and/or modify
 
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# it under the terms of the GNU General Public License as published by
 
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# the Free Software Foundation; either version 2 of the License, or
 
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# (at your option) any later version.
 
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# This program is distributed in the hope that it will be useful,
 
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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# GNU General Public License for more details.
 
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# You should have received a copy of the GNU General Public License
 
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# along with this program; if not, write to the Free Software
 
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
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"""An adapter between a Git Repository and a Bazaar Branch"""
 
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from bzrlib.foreign import (
 
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from bzrlib.transport import get_transport
 
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from bzrlib.plugins.git.foreign import (
 
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from bzrlib.plugins.git.mapping import default_mapping
 
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from bzrlib.plugins.git import git
 
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class GitTags(object):
 
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    def __init__(self, tags):
 
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        return iter(self._tags)
 
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class GitRepository(ForeignRepository):
 
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    """An adapter to git repositories for bzr."""
 
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    def __init__(self, gitdir, lockfiles):
 
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        self.base = gitdir.root_transport.base
 
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        self.control_files = lockfiles
 
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        self._git = gitdir._git
 
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        self.signatures = versionedfiles.VirtualSignatureTexts(self)
 
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        self.revisions = versionedfiles.VirtualRevisionTexts(self)
 
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        self._format = GitFormat()
 
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        self._fallback_repositories = []
 
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        self.tags = GitTags(self._git.get_tags())
 
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    def _all_revision_ids(self):
 
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        if self._git.heads == []:
 
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            cms = self._git.commits("--all", max_count=max_count, skip=skip)
 
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            ret.update([self.get_mapping().revision_id_foreign_to_bzr(cm.id) for cm in cms])
 
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    def supports_rich_root(self):
 
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    #def get_revision_delta(self, revision_id):
 
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    #    parent_revid = self.get_revision(revision_id).parent_ids[0]
 
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    #    diff = self._git.diff(ids.convert_revision_id_bzr_to_git(parent_revid),
 
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    #                   ids.convert_revision_id_bzr_to_git(revision_id))
 
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    def get_ancestry(self, revision_id):
 
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        revision_id = revision.ensure_null(revision_id)
 
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        if revision_id != revision.NULL_REVISION:
 
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                cms = self._git.commits(self.lookup_git_revid(revision_id, self.get_mapping()), max_count=max_count, skip=skip)
 
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                ret += [self.get_mapping().revision_id_foreign_to_bzr(cm.id) for cm in cms]
 
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    def get_signature_text(self, revision_id):
 
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        raise errors.NoSuchRevision(self, revision_id)
 
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    def lookup_revision_id(self, revid):
 
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        """Lookup a revision id.
 
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        :param revid: Bazaar revision id.
 
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        :return: Tuple with git revisionid and mapping.
 
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        # Yes, this doesn't really work, but good enough as a stub
 
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        return osutils.sha(rev_id).hexdigest(), self.get_mapping()
 
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    def has_signature_for_revision_id(self, revision_id):
 
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    def get_mapping(self):
 
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        return default_mapping
 
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    def get_parent_map(self, revision_ids):
 
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        for revid in revision_ids:
 
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            if revid == revision.NULL_REVISION:
 
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                git_commit_id = self.lookup_git_revid(revid, self.get_mapping())
 
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                commit = self._git.commit(git_commit_id)
 
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                ret[revid] = tuple([self.get_mapping().revision_id_foreign_to_bzr(p.id) for p in commit.parents])
 
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    def lookup_git_revid(self, bzr_revid, mapping):
 
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            return mapping.revision_id_bzr_to_foreign(bzr_revid)
 
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        except errors.InvalidRevisionId:
 
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            raise errors.NoSuchRevision(bzr_revid, self)
 
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    def get_revision(self, revision_id):
 
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        git_commit_id = self.lookup_git_revid(revision_id, self.get_mapping())
 
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        commit = self._git.commit(git_commit_id)
 
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        # print "fetched revision:", git_commit_id
 
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        revision = self._parse_rev(commit, self.get_mapping())
 
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    def has_revision(self, revision_id):
 
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            self.get_revision(revision_id)
 
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        except NoSuchRevision:
 
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    def get_revisions(self, revisions):
 
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        return [self.get_revision(r) for r in revisions]
 
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    def _parse_rev(klass, commit, mapping):
 
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        """Convert a git commit to a bzr revision.
 
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        :return: a `bzrlib.revision.Revision` object.
 
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            raise AssertionError("Commit object can't be None")
 
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        rev = ForeignRevision(commit.id, mapping, mapping.revision_id_foreign_to_bzr(commit.id))
 
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        rev.parent_ids = tuple([mapping.revision_id_foreign_to_bzr(p.id) for p in commit.parents])
 
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        rev.message = commit.message.decode("utf-8", "replace")
 
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        rev.committer = str(commit.committer).decode("utf-8", "replace")
 
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        rev.properties['author'] = str(commit.author).decode("utf-8", "replace")
 
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        rev.timestamp = time.mktime(commit.committed_date)
 
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    def revision_trees(self, revids):
 
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            yield self.revision_tree(revid)
 
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    def revision_tree(self, revision_id):
 
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        revision_id = revision.ensure_null(revision_id)
 
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        if revision_id == revision.NULL_REVISION:
 
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            inv = inventory.Inventory(root_id=None)
 
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            inv.revision_id = revision_id
 
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            return revisiontree.RevisionTree(self, inv, revision_id)
 
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        return GitRevisionTree(self, revision_id)
 
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    def get_inventory(self, revision_id):
 
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        assert revision_id != None
 
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        return self.revision_tree(revision_id).inventory
 
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    def set_make_working_trees(self, trees):
 
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def escape_file_id(file_id):
 
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    return file_id.replace('_', '__').replace(' ', '_s')
 
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def unescape_file_id(file_id):
 
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    return file_id.replace("_s", " ").replace("__", "_")
 
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class GitRevisionTree(revisiontree.RevisionTree):
 
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    def __init__(self, repository, revision_id):
 
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        self._repository = repository
 
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        self.revision_id = revision_id
 
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        git_id = repository.lookup_git_revid(revision_id, repository.get_mapping())
 
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        self.tree = repository._git.commit(git_id).tree
 
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        self._inventory = inventory.Inventory(revision_id=revision_id)
 
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        self._inventory.root.revision = revision_id
 
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        self._build_inventory(self.tree, self._inventory.root, "")
 
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    def get_revision_id(self):
 
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        return self.revision_id
 
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    def get_file_text(self, file_id):
 
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        entry = self._inventory[file_id]
 
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        if entry.kind == 'directory': return ""
 
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        return self._repository._git.blob(entry.text_id).data
 
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    def _build_inventory(self, tree, ie, path):
 
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        assert isinstance(path, str)
 
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        for name, mode, hexsha in tree.entries():
 
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            basename = name.decode("utf-8")
 
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                child_path = urlutils.join(path, name)
 
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            file_id = escape_file_id(child_path.encode('utf-8'))
 
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                child_ie = inventory.InventoryDirectory(file_id, basename, ie.file_id)
 
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                    child_ie = inventory.InventoryFile(file_id, basename, ie.file_id)
 
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                    child_ie.text_sha1 = osutils.sha_string(b.data)
 
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                    child_ie = inventory.InventoryLink(file_id, basename, ie.file_id)
 
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                    child_ie.text_sha1 = osutils.sha_string("")
 
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                    raise AssertionError(
 
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                        "Unknown file kind, perms=%r." % (mode,))
 
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                child_ie.text_id = b.id
 
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                child_ie.text_size = b.size
 
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                raise AssertionError(
 
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                    "Unknown blob kind, perms=%r." % (mode,))
 
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            child_ie.executable = bool(int(mode[3:], 8) & 0111)
 
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            child_ie.revision = self.revision_id
 
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            self._inventory.add(child_ie)
 
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                self._build_inventory(b, child_ie, child_path)
 
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class GitFormat(object):
 
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    supports_tree_reference = False
 
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    def get_format_description(self):
 
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        return "Git Repository"