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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
"""Conversion between refs and Bazaar revision pointers."""
from dulwich.repo import (
RefsContainer,
)
from bzrlib import (
errors,
)
def extract_tags(refs):
"""Extract the tags from a refs dictionary.
:param refs: Refs to extract the tags from.
:return: Dictionary mapping tag names to SHA1s.
"""
ret = {}
for k,v in refs.iteritems():
if k.startswith("refs/tags/") and not k.endswith("^{}"):
v = refs.get(k+"^{}", v)
ret[k[len("refs/tags/"):]] = v
return ret
def branch_name_to_ref(name, default=None):
"""Map a branch name to a ref.
:param name: Branch name
:return: ref string
"""
if name is None:
return default
if name == "HEAD":
return name
if not name.startswith("refs/"):
return "refs/heads/%s" % name
else:
return name
def tag_name_to_ref(name):
"""Map a tag name to a ref.
:param name: Tag name
:return: ref string
"""
return "refs/tags/%s" % name
def ref_to_branch_name(ref):
"""Map a ref to a branch name
:param ref: Ref
:return: A branch name
"""
if ref in (None, "HEAD"):
return ref
if ref.startswith("refs/heads/"):
return ref[len("refs/heads/"):]
raise ValueError("unable to map ref %s back to branch name" % ref)
def ref_to_tag_name(ref):
if ref.startswith("refs/tags/"):
return ref[len('refs/tags/'):]
raise ValueError("unable to map ref %s back to branch name" % ref)
class BazaarRefsContainer(RefsContainer):
def __init__(self, dir, object_store):
self.dir = dir
self.object_store = object_store
def set_symbolic_ref(self, name, other):
if name == "HEAD":
pass # FIXME: Switch default branch
else:
raise NotImplementedError(
"Symbolic references not supported for anything other than "
"HEAD")
def _get_revid_by_tag_name(self, tag_name):
for branch in self.dir.list_branches():
try:
# FIXME: This is ambiguous!
return branch.tags.lookup_tag(tag_name)
except errors.NoSuchTag:
pass
return None
def _get_revid_by_branch_name(self, branch_name):
try:
branch = self.dir.open_branch(branch_name)
except errors.NoColocatedBranchSupport:
if branch_name in ("HEAD", "master"):
branch = self.dir.open_branch()
else:
raise
return branch.last_revision()
def read_loose_ref(self, ref):
try:
branch_name = ref_to_branch_name(ref)
except ValueError:
tag_name = ref_to_tag_name(ref)
revid = self._get_revid_by_tag_name(tag_name)
else:
revid = self._get_revid_by_branch_name(branch_name)
return self.object_store._lookup_revision_sha1(revid)
def allkeys(self):
keys = set()
for branch in self.dir.list_branches():
repo = branch.repository
if repo.has_revision(branch.last_revision()):
ref = branch_name_to_ref(branch.name, "refs/heads/master")
keys.add(ref)
if branch.name is None:
keys.add("HEAD")
for tag_name, revid in branch.tags.get_tag_dict().iteritems():
if repo.has_revision(revid):
keys.add(tag_name_to_ref(tag_name))
return keys
def __delitem__(self, ref):
try:
branch_name = ref_to_branch_name(ref)
except ValueError:
return # FIXME: Cope with tags!
self.dir.destroy_branch(branch_name)
def __setitem__(self, ref, sha):
try:
branch_name = ref_to_branch_name(ref)
except ValueError:
# FIXME: Cope with tags!
return
try:
target_branch = self.repo_dir.open_branch(branch_name)
except errors.NotBranchError:
target_branch = self.repo.create_branch(branch_name)
rev_id = self.mapping.revision_id_foreign_to_bzr(sha)
target_branch.lock_write()
try:
target_branch.generate_revision_history(rev_id)
finally:
target_branch.unlock()
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