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# Copyright (C) 2005, 2006 Canonical Ltd
#
# 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
# TODO: Some kind of command-line display of revision properties:
# perhaps show them in log -v and allow them as options to the commit command.
from bzrlib.lazy_import import lazy_import
lazy_import(globals(), """
from bzrlib import deprecated_graph
""")
from bzrlib import (
errors,
symbol_versioning,
)
from bzrlib.osutils import contains_whitespace
from bzrlib.progress import DummyProgress
NULL_REVISION="null:"
CURRENT_REVISION="current:"
class Revision(object):
"""Single revision on a branch.
Revisions may know their revision_hash, but only once they've been
written out. This is not stored because you cannot write the hash
into the file it describes.
After bzr 0.0.5 revisions are allowed to have multiple parents.
parent_ids
List of parent revision_ids
properties
Dictionary of revision properties. These are attached to the
revision as extra metadata. The name must be a single
word; the value can be an arbitrary string.
"""
def __init__(self, revision_id, properties=None, **args):
self.revision_id = revision_id
self.properties = properties or {}
self._check_properties()
self.parent_ids = []
self.parent_sha1s = []
"""Not used anymore - legacy from for 4."""
self.__dict__.update(args)
def __repr__(self):
return "<Revision id %s>" % self.revision_id
def __eq__(self, other):
if not isinstance(other, Revision):
return False
# FIXME: rbc 20050930 parent_ids are not being compared
return (
self.inventory_sha1 == other.inventory_sha1
and self.revision_id == other.revision_id
and self.timestamp == other.timestamp
and self.message == other.message
and self.timezone == other.timezone
and self.committer == other.committer
and self.properties == other.properties)
def __ne__(self, other):
return not self.__eq__(other)
def _check_properties(self):
"""Verify that all revision properties are OK."""
for name, value in self.properties.iteritems():
if not isinstance(name, basestring) or contains_whitespace(name):
raise ValueError("invalid property name %r" % name)
if not isinstance(value, basestring):
raise ValueError("invalid property value %r for %r" %
(name, value))
def get_history(self, repository):
"""Return the canonical line-of-history for this revision.
If ghosts are present this may differ in result from a ghost-free
repository.
"""
current_revision = self
reversed_result = []
while current_revision is not None:
reversed_result.append(current_revision.revision_id)
if not len (current_revision.parent_ids):
reversed_result.append(None)
current_revision = None
else:
next_revision_id = current_revision.parent_ids[0]
current_revision = repository.get_revision(next_revision_id)
reversed_result.reverse()
return reversed_result
def get_summary(self):
"""Get the first line of the log message for this revision.
"""
return self.message.lstrip().split('\n', 1)[0]
def get_apparent_author(self):
"""Return the apparent author of this revision.
If the revision properties contain the author name,
return it. Otherwise return the committer name.
"""
return self.properties.get('author', self.committer)
def iter_ancestors(revision_id, revision_source, only_present=False):
ancestors = (revision_id,)
distance = 0
while len(ancestors) > 0:
new_ancestors = []
for ancestor in ancestors:
if not only_present:
yield ancestor, distance
try:
revision = revision_source.get_revision(ancestor)
except errors.NoSuchRevision, e:
if e.revision == revision_id:
raise
else:
continue
if only_present:
yield ancestor, distance
new_ancestors.extend(revision.parent_ids)
ancestors = new_ancestors
distance += 1
def find_present_ancestors(revision_id, revision_source):
"""Return the ancestors of a revision present in a branch.
It's possible that a branch won't have the complete ancestry of
one of its revisions.
"""
found_ancestors = {}
anc_iter = enumerate(iter_ancestors(revision_id, revision_source,
only_present=True))
for anc_order, (anc_id, anc_distance) in anc_iter:
if anc_id not in found_ancestors:
found_ancestors[anc_id] = (anc_order, anc_distance)
return found_ancestors
def __get_closest(intersection):
intersection.sort()
matches = []
for entry in intersection:
if entry[0] == intersection[0][0]:
matches.append(entry[2])
return matches
def is_reserved_id(revision_id):
"""Determine whether a revision id is reserved
:return: True if the revision is is reserved, False otherwise
"""
return isinstance(revision_id, basestring) and revision_id.endswith(':')
def check_not_reserved_id(revision_id):
"""Raise ReservedId if the supplied revision_id is reserved"""
if is_reserved_id(revision_id):
raise errors.ReservedId(revision_id)
def ensure_null(revision_id):
"""Ensure only NULL_REVISION is used to represent the null revision"""
if revision_id is None:
symbol_versioning.warn('NULL_REVISION should be used for the null'
' revision instead of None, as of bzr 0.91.',
DeprecationWarning, stacklevel=2)
return NULL_REVISION
else:
return revision_id
def is_null(revision_id):
if revision_id is None:
symbol_versioning.warn('NULL_REVISION should be used for the null'
' revision instead of None, as of bzr 0.90.',
DeprecationWarning, stacklevel=2)
return revision_id in (None, NULL_REVISION)
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