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# Copyright (C) 2007-2008 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
"""Converters, etc for going between Bazaar and Git ids."""
from bzrlib import errors, foreign
from bzrlib.inventory import ROOT_ID
from bzrlib.foreign import (
ForeignVcs,
VcsMappingRegistry,
ForeignRevision,
)
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 BzrGitMapping(foreign.VcsMapping):
"""Class that maps between Git and Bazaar semantics."""
experimental = False
def __init__(self):
super(BzrGitMapping, self).__init__(foreign_git)
def __eq__(self, other):
return type(self) == type(other) and self.revid_prefix == other.revid_prefix
@classmethod
def revision_id_foreign_to_bzr(cls, git_rev_id):
"""Convert a git revision id handle to a Bazaar revision id."""
return "%s:%s" % (cls.revid_prefix, git_rev_id)
@classmethod
def revision_id_bzr_to_foreign(cls, bzr_rev_id):
"""Convert a Bazaar revision id to a git revision id handle."""
if not bzr_rev_id.startswith("%s:" % cls.revid_prefix):
raise errors.InvalidRevisionId(bzr_rev_id, cls)
return bzr_rev_id[len(cls.revid_prefix)+1:], cls()
def generate_file_id(self, path):
if path == "":
return ROOT_ID
return escape_file_id(path.encode('utf-8'))
def import_commit(self, commit):
"""Convert a git commit to a bzr revision.
:return: a `bzrlib.revision.Revision` object.
"""
if commit is None:
raise AssertionError("Commit object can't be None")
rev = ForeignRevision(commit.id, self, self.revision_id_foreign_to_bzr(commit.id))
rev.parent_ids = tuple([self.revision_id_foreign_to_bzr(p) for p in commit.parents])
rev.message = commit.message.decode("utf-8", "replace")
rev.committer = str(commit.committer).decode("utf-8", "replace")
if commit.committer != commit.author:
rev.properties['author'] = str(commit.author).decode("utf-8", "replace")
rev.timestamp = commit.commit_time
rev.timezone = 0
return rev
class BzrGitMappingv1(BzrGitMapping):
revid_prefix = 'git-v1'
experimental = False
class BzrGitMappingExperimental(BzrGitMappingv1):
revid_prefix = 'git-experimental'
experimental = True
class GitMappingRegistry(VcsMappingRegistry):
def revision_id_bzr_to_foreign(self, bzr_revid):
if not bzr_revid.startswith("git-"):
raise errors.InvalidRevisionId(bzr_revid, None)
(mapping_version, git_sha) = bzr_revid.split(":", 1)
mapping = self.get(mapping_version)
return mapping.revision_id_bzr_to_foreign(bzr_revid)
parse_revision_id = revision_id_bzr_to_foreign
mapping_registry = GitMappingRegistry()
mapping_registry.register_lazy('git-v1', "bzrlib.plugins.git.mapping",
"BzrGitMappingv1")
mapping_registry.register_lazy('git-experimental', "bzrlib.plugins.git.mapping",
"BzrGitMappingExperimental")
class ForeignGit(ForeignVcs):
"""Foreign Git."""
def __init__(self):
super(ForeignGit, self).__init__(mapping_registry)
@classmethod
def show_foreign_revid(cls, foreign_revid):
return { "git commit": foreign_revid }
foreign_git = ForeignGit()
default_mapping = BzrGitMappingv1()
def inventory_to_tree_and_blobs(repo, mapping, revision_id):
from dulwich.objects import Tree, Blob
from bzrlib.inventory import InventoryDirectory, InventoryFile
import stat
stack = []
cur = ""
tree = Tree()
inv = repo.get_inventory(revision_id)
for path, entry in inv.iter_entries():
while stack and not path.startswith(cur):
tree.serialize()
sha = tree.sha().hexdigest()
yield sha, tree, path
t = (stat.S_IFDIR, splitpath(cur)[-1:][0].encode('UTF-8'), sha)
cur, tree = stack.pop()
tree.add(*t)
if type(entry) == InventoryDirectory:
stack.append((cur, tree))
cur = path
tree = Tree()
if type(entry) == InventoryFile:
#FIXME: We can make potentially make this Lazy to avoid shaing lots of stuff
# and having all these objects in memory at once
blob = Blob()
_, blob._text = repo.iter_files_bytes([(entry.file_id, revision_id, path)]).next()
sha = blob.sha().hexdigest()
yield sha, blob, path
name = splitpath(path)[-1:][0].encode('UTF-8')
mode = stat.S_IFREG | 0644
if entry.executable:
mode |= 0111
tree.add(mode, name, sha)
while len(stack) > 1:
tree.serialize()
sha = tree.sha().hexdigest()
yield sha, tree, path
t = (stat.S_IFDIR, splitpath(cur)[-1:][0].encode('UTF-8'), sha)
cur, tree = stack.pop()
tree.add(*t)
tree.serialize()
yield tree.sha().hexdigest(), tree, path
def revision_to_commit(rev, tree_sha, parent_lookup):
"""Turn a Bazaar revision in to a Git commit
:param tree_sha: Tree sha for the commit
:param parent_lookup: Function for looking up the GIT sha equiv of a bzr revision
:return dulwich.objects.Commit represent the revision:
"""
from dulwich.objects import Commit
commit = Commit()
commit._tree = tree_sha
for p in rev.parent_ids:
commit._parents.append(parent_lookup(p))
commit._message = rev.message
commit._committer = rev.committer
if 'author' in rev.properties:
commit._author = rev.properties['author']
else:
commit._author = rev.committer
commit._commit_time = long(rev.timestamp)
commit.serialize()
return commit
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