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# Copyright (C) 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
"""Roundtripping support."""
from cStringIO import StringIO
class BzrGitRevisionMetadata(object):
"""Metadata for a Bazaar revision roundtripped into Git.
:ivar revision_id: Revision id, as string
:ivar properties: Revision properties, as dictionary
:ivar file_ids: File ids, as map from path -> file id
"""
revision_id = None
file_ids = {}
properties = {}
def __nonzero__(self):
return (self.revision_id is None or self.file_ids or self.properties)
def parse_roundtripping_metadata(text):
"""Parse Bazaar roundtripping metadata."""
ret = BzrGitRevisionMetadata()
f = StringIO(text)
for l in f.readlines():
(key, value) = l.split(":", 1)
if key == "revision-id":
ret.revision_id = value.strip()
else:
raise ValueError
return ret
def generate_roundtripping_metadata(metadata):
"""Serialize the roundtripping metadata.
:param metadata: A `BzrGitRevisionMetadata` instance
:return: String with revision metadata
"""
return "revision-id: %s\n" % metadata.revision_id
def extract_bzr_metadata(message):
"""Extract Bazaar metadata from a commit message.
:param message: Commit message to extract from
:return: Tuple with original commit message and metadata object
"""
split = message.split("\n--BZR--\n", 1)
if len(split) != 2:
return message, None
return split[0], parse_roundtripping_metadata(split[1])
def inject_bzr_metadata(message, metadata):
if metadata is None:
return message
return message + "\n--BZR--\n" + generate_roundtripping_metadata(metadata)
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