/brz/remove-bazaar

# Copyright (C) 2007 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

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

import git

import os

import time

import bzrlib

from bzrlib import (

    deprecated_graph,

    errors,

    inventory,

    osutils,

    repository,

    revision,

    revisiontree,

    urlutils,

    versionedfile,

    )

from bzrlib.transport import get_transport

from bzrlib.plugins.git import (

    cache,

    ids,

    )

class GitRepository(repository.Repository):

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

    _serializer = None

    def __init__(self, gitdir, lockfiles):

        self.base = gitdir.root_transport.base

        self.bzrdir = gitdir

        self.control_files = lockfiles

        self._git = git.repo.Repo(gitdir.root_transport.local_abspath("."))

        cache_dir = cache.create_cache_dir()

        cachedir_transport = get_transport(cache_dir)

        cache_file = os.path.join(cache_dir, 'cache-%s' % ids.NAMESPACE)

        self.texts = None

        self.signatures = versionedfile.VirtualSignatureTexts(self)

        self.revisions = versionedfile.VirtualRevisionTexts(self)

        self._format = GitFormat()

        self._fallback_repositories = []

    def _all_revision_ids(self):

        if self._git.heads == []:

            return set()

        ret = set()

        skip = 0

        max_count = 1000

        cms = None

        while cms != []:

            cms = self._git.commits("--all", max_count=max_count, skip=skip)

            skip += max_count

            ret.update([ids.convert_revision_id_git_to_bzr(cm.id) for cm in cms])

        return ret

    def is_shared(self):

        return True

    def supports_rich_root(self):

        return False

    #def get_revision_delta(self, revision_id):

    #    parent_revid = self.get_revision(revision_id).parent_ids[0]

    #    diff = self._git.diff(ids.convert_revision_id_bzr_to_git(parent_revid),

    #                   ids.convert_revision_id_bzr_to_git(revision_id))

    def get_ancestry(self, revision_id):

        revision_id = revision.ensure_null(revision_id)

        ret = []

        if revision_id != revision.NULL_REVISION:

            skip = 0

            max_count = 1000

            cms = None

            while cms != []:

                cms = self._git.commits(ids.convert_revision_id_bzr_to_git(revision_id), max_count=max_count, skip=skip)

                skip += max_count

                ret += [ids.convert_revision_id_git_to_bzr(cm.id) for cm in cms]

        return [None] + ret

    def get_signature_text(self, revision_id):

        raise errors.NoSuchRevision(self, revision_id)

    def has_signature_for_revision_id(self, revision_id):

        return False

    def get_parent_map(self, revision_ids):

        ret = {}

        for revid in revision_ids:

            if revid == revision.NULL_REVISION:

                ret[revid] = ()

            else:

                commit = self._git.commit(ids.convert_revision_id_bzr_to_git(revid))

                ret[revid] = tuple([ids.convert_revision_id_git_to_bzr(p.id) for p in commit.parents])

        return ret

    def get_revision(self, revision_id):

        git_commit_id = ids.convert_revision_id_bzr_to_git(revision_id)

        commit = self._git.commit(git_commit_id)

        # print "fetched revision:", git_commit_id

        revision = self._parse_rev(commit)

        return revision

    def has_revision(self, revision_id):

        try:

            self.get_revision(revision_id)

        except NoSuchRevision:

            return False

        else:

            return True

    def get_revisions(self, revisions):

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

    @classmethod

    def _parse_rev(klass, commit):

        """Convert a git commit to a bzr revision.

        :return: a `bzrlib.revision.Revision` object.

        """

        rev = revision.Revision(ids.convert_revision_id_git_to_bzr(commit.id))

        rev.parent_ids = tuple([ids.convert_revision_id_git_to_bzr(p.id) for p in commit.parents])

        rev.inventory_sha1 = ""

        rev.message = commit.message.decode("utf-8", "replace")

        rev.committer = str(commit.committer)

        rev.properties['author'] = str(commit.author)

        rev.timestamp = time.mktime(commit.committed_date)

        rev.timezone = 0

        return rev

    def revision_trees(self, revids):

        for revid in revids:

            yield self.revision_tree(revid)

    def revision_tree(self, revision_id):

        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 escape_file_id(file_id):

    return file_id.replace('_', '__').replace(' ', '_s')

def unescape_file_id(file_id):

    return file_id.replace("_s", " ").replace("__", "_")

class GitRevisionTree(revisiontree.RevisionTree):

    def __init__(self, repository, revision_id):

        self._repository = repository

        self.revision_id = revision_id

        git_id = ids.convert_revision_id_bzr_to_git(revision_id)

        self.tree = repository._git.commit(git_id).tree

        self._inventory = inventory.Inventory(revision_id=revision_id)

        self._inventory.root.revision = revision_id

        self._build_inventory(self.tree, self._inventory.root, "")

    def get_revision_id(self):

        return self.revision_id

    def get_file_text(self, file_id):

        entry = self._inventory[file_id]

        if entry.kind == 'directory': return ""

        return self._repository._git.blob(entry.text_id).data

    def _build_inventory(self, tree, ie, path):

        assert isinstance(path, str)

        for b in tree.contents:

            basename = b.name.decode("utf-8")

            if path == "":

                child_path = b.name

            else:

                child_path = urlutils.join(path, b.name)

            file_id = escape_file_id(child_path.encode('utf-8'))

            if b.mode[0] == '0':

                child_ie = inventory.InventoryDirectory(file_id, basename, ie.file_id)

            elif b.mode[0] == '1':

                if b.mode[1] == '0':

                    child_ie = inventory.InventoryFile(file_id, basename, ie.file_id)

                    child_ie.text_sha1 = osutils.sha_string(b.data)

                elif b.mode[1] == '2':

                    child_ie = inventory.InventoryLink(file_id, basename, ie.file_id)

                    child_ie.text_sha1 = osutils.sha_string("")

                else:

                    raise AssertionError(

                        "Unknown file kind, perms=%r." % (b.mode,))

                child_ie.text_id = b.id

                child_ie.text_size = b.size

            else:

                raise AssertionError(

                    "Unknown blob kind, perms=%r." % (b.mode,))

            child_ie.executable = bool(int(b.mode[3:], 8) & 0111)

            child_ie.revision = self.revision_id

            self._inventory.add(child_ie)

            if b.mode[0] == '0':

                self._build_inventory(b, child_ie, child_path)

class GitFormat(object):

    supports_tree_reference = False

    def get_format_description(self):

        return "Git Repository"