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# Copyright (C) 2009 by 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
"""Revision pseudonyms."""
from collections import defaultdict
from breezy import (
errors,
foreign,
ui,
urlutils,
)
def parse_git_svn_id(text):
"""Parse a git svn id string.
:param text: git svn id
:return: URL, revision number, uuid
"""
(head, uuid) = text.rsplit(" ", 1)
(full_url, rev) = head.rsplit("@", 1)
return (full_url.encode("utf-8"), int(rev), uuid.encode("utf-8"))
class SubversionBranchUrlFinder(object):
def __init__(self):
self._roots = defaultdict(set)
def find_root(self, uuid, url):
for root in self._roots[uuid]:
if url.startswith(root):
return root
try:
from subvertpy.ra import RemoteAccess
except ImportError:
return None
c = RemoteAccess(url)
root = c.get_repos_root()
self._roots[uuid].add(root)
return root
def find_branch_path(self, uuid, url):
root = self.find_root(uuid, url)
if root is None:
return None
assert url.startswith(root)
return url[len(root):].strip("/")
svn_branch_path_finder = SubversionBranchUrlFinder()
def _extract_converted_from_revid(rev):
if "converted-from" not in rev.properties:
return
for line in rev.properties.get("converted-from", "").splitlines():
(kind, serialized_foreign_revid) = line.split(" ", 1)
yield (kind, serialized_foreign_revid)
def _extract_cscvs(rev):
"""Older-style launchpad-cscvs import."""
if "cscvs-svn-branch-path" not in rev.properties:
return
yield (
"svn", "%s:%s:%s" % (
rev.properties["cscvs-svn-repository-uuid"],
rev.properties["cscvs-svn-revision-number"],
urlutils.quote(rev.properties["cscvs-svn-branch-path"].strip("/"))))
def _extract_git_svn_id(rev):
if "git-svn-id" not in rev.properties:
return
(full_url, revnum, uuid) = parse_git_svn_id(rev.properties['git-svn-id'])
branch_path = svn_branch_path_finder.find_branch_path(uuid, full_url)
if branch_path is not None:
yield ("svn", "%s:%d:%s" % (uuid, revnum, urlutils.quote(branch_path)))
def _extract_foreign_revision(rev):
# Perhaps 'rev' is a foreign revision ?
if getattr(rev, "foreign_revid", None) is not None:
yield ("svn", rev.mapping.vcs.serialize_foreign_revid(rev.foreign_revid))
def _extract_foreign_revid(rev):
# Try parsing the revision id
try:
foreign_revid, mapping = \
foreign.foreign_vcs_registry.parse_revision_id(rev.revision_id)
except errors.InvalidRevisionId:
pass
else:
yield (
mapping.vcs.abbreviation,
mapping.vcs.serialize_foreign_revid(foreign_revid))
def _extract_debian_md5sum(rev):
if 'deb-md5' in rev.properties:
yield ("debian-md5sum", rev.properties["deb-md5"])
_foreign_revid_extractors = [
_extract_converted_from_revid,
_extract_cscvs,
_extract_git_svn_id,
_extract_foreign_revision,
_extract_foreign_revid,
_extract_debian_md5sum,
]
def extract_foreign_revids(rev):
"""Find ids of semi-equivalent revisions in foreign VCS'es.
:param: Bazaar revision object
:return: Set with semi-equivalent revisions.
"""
ret = set()
for extractor in _foreign_revid_extractors:
ret.update(extractor(rev))
return ret
def find_pseudonyms(repository, revids):
"""Find revisions that are pseudonyms of each other.
:param repository: Repository object
:param revids: Sequence of revision ids to check
:return: Iterable over sets of pseudonyms
"""
# Where have foreign revids ended up?
conversions = defaultdict(set)
# What are native revids conversions of?
conversion_of = defaultdict(set)
revs = repository.get_revisions(revids)
pb = ui.ui_factory.nested_progress_bar()
try:
for i, rev in enumerate(revs):
pb.update("finding pseudonyms", i, len(revs))
for foreign_revid in extract_foreign_revids(rev):
conversion_of[rev.revision_id].add(foreign_revid)
conversions[foreign_revid].add(rev.revision_id)
finally:
pb.finished()
done = set()
for foreign_revid in conversions.keys():
ret = set()
check = set(conversions[foreign_revid])
while check:
x = check.pop()
extra = set()
for frevid in conversion_of[x]:
extra.update(conversions[frevid])
del conversions[frevid]
del conversion_of[x]
check.update(extra)
ret.add(x)
if len(ret) > 1:
yield ret
def pseudonyms_as_dict(l):
"""Convert an iterable over pseudonyms to a dictionary.
:param l: Iterable over sets of pseudonyms
:return: Dictionary with pseudonyms for each revid.
"""
ret = {}
for pns in l:
for pn in pns:
ret[pn] = pns - set([pn])
return ret
def generate_rebase_map_from_pseudonyms(pseudonym_dict, existing, desired):
"""Create a rebase map from pseudonyms and existing/desired ancestry.
:param pseudonym_dict: Dictionary with pseudonym as returned by
pseudonyms_as_dict()
:param existing: Existing ancestry, might need to be rebased
:param desired: Desired ancestry
:return: rebase map, as dictionary
"""
rebase_map = {}
for revid in existing:
for pn in pseudonym_dict.get(revid, []):
if pn in desired:
rebase_map[revid] = pn
return rebase_map
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