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# Copyright (C) 2011-2018 Jelmer Vernooij <jelmer@jelmer.uk>
#
# 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"""Unpeel map storage."""
from __future__ import absolute_import
from collections import defaultdict
from cStringIO import StringIO
from ... import (
errors,
trace,
)
class UnpeelMap(object):
"""Unpeel map.
Keeps track of the unpeeled object id of tags.
"""
def __init__(self):
self._map = defaultdict(set)
self._re_map = {}
def update(self, m):
for k, v in m.iteritems():
self._map[k].update(v)
for i in v:
self._re_map[i] = k
def load(self, f):
firstline = f.readline()
if firstline != "unpeel map version 1\n":
raise AssertionError("invalid format for unpeel map: %r" % firstline)
for l in f.readlines():
(k, v) = l.split(":", 1)
k = k.strip()
v = v.strip()
self._map[k].add(v)
self._re_map[v] = k
def save(self, f):
f.write("unpeel map version 1\n")
for k, vs in self._map.iteritems():
for v in vs:
f.write("%s: %s\n" % (k, v))
def save_in_repository(self, repository):
f = StringIO()
try:
self.save(f)
f.seek(0)
repository.control_transport.put_file("git-unpeel-map", f)
finally:
f.close()
def peel_tag(self, git_sha, default=None):
"""Peel a tag."""
return self._re_map.get(git_sha, default)
def re_unpeel_tag(self, new_git_sha, old_git_sha):
"""Re-unpeel a tag.
Bazaar can't store unpeeled refs so in order to prevent peeling
existing tags when pushing they are "unpeeled" here.
"""
if old_git_sha is not None and old_git_sha in self._map[new_git_sha]:
trace.mutter("re-unpeeling %r to %r", new_git_sha, old_git_sha)
return old_git_sha
return new_git_sha
@classmethod
def from_repository(cls, repository):
"""Load the unpeel map for a repository.
"""
m = UnpeelMap()
try:
m.load(repository.control_transport.get("git-unpeel-map"))
except errors.NoSuchFile:
pass
return m
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