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# Copyright (C) 2009-2018 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
"""Custom revision specifier for Subversion."""
from __future__ import absolute_import
# Please note that imports are delayed as much as possible here since
# if DWIM revspecs are supported this module is imported by __init__.py.
from ... import version_info as breezy_version
from ...errors import (
InvalidRevisionId,
InvalidRevisionSpec,
)
from ...revision import (
NULL_REVISION,
)
from ...revisionspec import (
RevisionInfo,
RevisionSpec,
)
def valid_git_sha1(hex):
"""Check if `hex` is a validly formatted Git SHA1.
:param hex: Hex string to validate
:return: Boolean
"""
import binascii
try:
binascii.unhexlify(hex)
except TypeError:
return False
else:
return True
class RevisionSpec_git(RevisionSpec):
"""Selects a revision using a Subversion revision number."""
help_txt = """Selects a revision using a Git revision sha1.
"""
prefix = 'git:'
wants_revision_history = False
def _lookup_git_sha1(self, branch, sha1):
from .errors import (
GitSmartRemoteNotSupported,
)
from .mapping import (
default_mapping,
)
bzr_revid = getattr(branch.repository, "lookup_foreign_revision_id",
default_mapping.revision_id_foreign_to_bzr)(sha1)
try:
if branch.repository.has_revision(bzr_revid):
return RevisionInfo.from_revision_id(branch, bzr_revid)
except GitSmartRemoteNotSupported:
return RevisionInfo(branch, None, bzr_revid)
raise InvalidRevisionSpec(self.user_spec, branch)
def __nonzero__(self):
# The default implementation uses branch.repository.has_revision()
if self.rev_id is None:
return False
if self.rev_id == NULL_REVISION:
return False
return True
def _find_short_git_sha1(self, branch, sha1):
from .mapping import (
ForeignGit,
mapping_registry,
)
parse_revid = getattr(branch.repository, "lookup_bzr_revision_id",
mapping_registry.parse_revision_id)
with branch.repository.lock_read():
graph = branch.repository.get_graph()
for revid, _ in graph.iter_ancestry([branch.last_revision()]):
if revid == NULL_REVISION:
continue
try:
foreign_revid, mapping = parse_revid(revid)
except InvalidRevisionId:
continue
if not isinstance(mapping.vcs, ForeignGit):
continue
if foreign_revid.startswith(sha1):
return RevisionInfo.from_revision_id(branch, revid)
raise InvalidRevisionSpec(self.user_spec, branch)
def _match_on(self, branch, revs):
loc = self.spec.find(':')
git_sha1 = self.spec[loc+1:].encode("utf-8")
if len(git_sha1) > 40 or not valid_git_sha1(git_sha1):
raise InvalidRevisionSpec(self.user_spec, branch)
from . import (
lazy_check_versions,
)
lazy_check_versions()
if len(git_sha1) == 40:
return self._lookup_git_sha1(branch, git_sha1)
else:
return self._find_short_git_sha1(branch, git_sha1)
def needs_branch(self):
return True
def get_branch(self):
return None
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