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# Copyright (C) 2005, 2006 Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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# TODO: Some kind of command-line display of revision properties:
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# perhaps show them in log -v and allow them as options to the commit command.
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
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from bzrlib import deprecated_graph
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from bzrlib.osutils import contains_whitespace
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from bzrlib.progress import DummyProgress
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CURRENT_REVISION="current:"
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class RevisionReference(object):
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Reference to a stored revision.
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Includes the revision_id and revision_sha1.
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def __init__(self, revision_id, revision_sha1=None):
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if revision_id == None \
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or isinstance(revision_id, basestring):
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self.revision_id = revision_id
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raise ValueError('bad revision_id %r' % revision_id)
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if revision_sha1 != None:
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if isinstance(revision_sha1, basestring) \
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and len(revision_sha1) == 40:
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self.revision_sha1 = revision_sha1
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raise ValueError('bad revision_sha1 %r' % revision_sha1)
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class Revision(object):
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After bzr 0.0.5 revisions are allowed to have multiple parents.
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List of parent revision_ids
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Dictionary of revision properties. These are attached to the
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revision as extra metadata. The name must be a single
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word; the value can be an arbitrary string.
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List of parent revisions, each is a RevisionReference.
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def __init__(self, revision_id, properties=None, **args):
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self.revision_id = revision_id
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self.properties = properties or {}
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self._check_properties()
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self.parent_sha1s = []
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"""Not used anymore - legacy from for 4."""
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def __init__(self, **args):
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self.__dict__.update(args)
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def __repr__(self):
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return "<Revision id %s>" % self.revision_id
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def __eq__(self, other):
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if not isinstance(other, Revision):
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# FIXME: rbc 20050930 parent_ids are not being compared
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self.inventory_sha1 == other.inventory_sha1
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and self.revision_id == other.revision_id
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and self.timestamp == other.timestamp
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and self.message == other.message
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and self.timezone == other.timezone
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and self.committer == other.committer
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and self.properties == other.properties)
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def __ne__(self, other):
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return not self.__eq__(other)
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def _check_properties(self):
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"""Verify that all revision properties are OK."""
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for name, value in self.properties.iteritems():
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if not isinstance(name, basestring) or contains_whitespace(name):
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raise ValueError("invalid property name %r" % name)
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if not isinstance(value, basestring):
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raise ValueError("invalid property value %r for %r" %
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def get_history(self, repository):
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"""Return the canonical line-of-history for this revision.
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If ghosts are present this may differ in result from a ghost-free
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current_revision = self
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while current_revision is not None:
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reversed_result.append(current_revision.revision_id)
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if not len (current_revision.parent_ids):
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reversed_result.append(None)
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current_revision = None
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next_revision_id = current_revision.parent_ids[0]
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current_revision = repository.get_revision(next_revision_id)
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reversed_result.reverse()
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return reversed_result
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def get_summary(self):
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"""Get the first line of the log message for this revision.
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return self.message.lstrip().split('\n', 1)[0]
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def get_apparent_author(self):
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"""Return the apparent author of this revision.
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If the revision properties contain the author name,
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return it. Otherwise return the committer name.
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return self.properties.get('author', self.committer)
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from bzrlib.xml import Element, SubElement
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root = Element('revision',
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committer = self.committer,
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timestamp = '%.9f' % self.timestamp,
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revision_id = self.revision_id,
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inventory_id = self.inventory_id,
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inventory_sha1 = self.inventory_sha1,
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root.set('timezone', str(self.timezone))
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msg = SubElement(root, 'message')
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msg.text = self.message
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pelts = SubElement(root, 'parents')
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pelts.tail = pelts.text = '\n'
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for rr in self.parents:
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assert isinstance(rr, RevisionReference)
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p = SubElement(pelts, 'revision_ref')
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p.set('revision_id', rr.revision_id)
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p.set('revision_sha1', rr.revision_sha1)
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def from_element(cls, elt):
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return unpack_revision(elt)
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from_element = classmethod(from_element)
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def unpack_revision(elt):
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"""Convert XML element into Revision object."""
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# <changeset> is deprecated...
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if elt.tag not in ('revision', 'changeset'):
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raise bzrlib.errors.BzrError("unexpected tag in revision file: %r" % elt)
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rev = Revision(committer = elt.get('committer'),
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timestamp = float(elt.get('timestamp')),
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revision_id = elt.get('revision_id'),
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inventory_id = elt.get('inventory_id'),
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inventory_sha1 = elt.get('inventory_sha1')
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precursor = elt.get('precursor')
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precursor_sha1 = elt.get('precursor_sha1')
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pelts = elt.find('parents')
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assert p.tag == 'revision_ref', \
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"bad parent node tag %r" % p.tag
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rev_ref = RevisionReference(p.get('revision_id'),
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p.get('revision_sha1'))
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rev.parents.append(rev_ref)
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prec_parent = rev.parents[0].revision_id
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assert prec_parent == precursor
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# revisions written prior to 0.0.5 have a single precursor
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# give as an attribute
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rev_ref = RevisionReference(precursor, precursor_sha1)
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rev.parents.append(rev_ref)
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v = elt.get('timezone')
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rev.timezone = v and int(v)
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rev.message = elt.findtext('message') # text of <message>
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REVISION_ID_RE = None
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def validate_revision_id(rid):
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"""Check rid is syntactically valid for a revision id."""
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global REVISION_ID_RE
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if not REVISION_ID_RE:
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REVISION_ID_RE = re.compile('[\w.-]+@[\w.-]+--?\d+--?[0-9a-f]+\Z')
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if not REVISION_ID_RE.match(rid):
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raise ValueError("malformed revision-id %r" % rid)
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def is_ancestor(revision_id, candidate_id, revision_source):
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"""Return true if candidate_id is an ancestor of revision_id.
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A false negative will be returned if any intermediate descendent of
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candidate_id is not present in any of the revision_sources.
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revisions_source is an object supporting a get_revision operation that
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behaves like Branch's.
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for ancestor_id, distance in iter_ancestors(revision_id, revision_source):
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if ancestor_id == candidate_id:
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def iter_ancestors(revision_id, revision_source, only_present=False):
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ancestors = (revision_id,)
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found_ancestors = {}
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anc_iter = enumerate(iter_ancestors(revision_id, revision_source,
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only_present=True))
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for anc_order, (anc_id, anc_distance) in anc_iter:
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if anc_id not in found_ancestors:
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if not found_ancestors.has_key(anc_id):
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found_ancestors[anc_id] = (anc_order, anc_distance)
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return found_ancestors
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def __get_closest(intersection):
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for entry in intersection:
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if entry[0] == intersection[0][0]:
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matches.append(entry[2])
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def is_reserved_id(revision_id):
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"""Determine whether a revision id is reserved
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:return: True if the revision is is reserved, False otherwise
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class AmbiguousBase(bzrlib.errors.BzrError):
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def __init__(self, bases):
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msg = "The correct base is unclear, becase %s are all equally close" %\
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bzrlib.errors.BzrError.__init__(self, msg)
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def common_ancestor(revision_a, revision_b, revision_source):
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"""Find the ancestor common to both revisions that is closest to both.
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return isinstance(revision_id, basestring) and revision_id.endswith(':')
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def check_not_reserved_id(revision_id):
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"""Raise ReservedId if the supplied revision_id is reserved"""
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if is_reserved_id(revision_id):
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raise errors.ReservedId(revision_id)
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def ensure_null(revision_id):
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"""Ensure only NULL_REVISION is used to represent the null revision"""
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if revision_id is None:
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symbol_versioning.warn('NULL_REVISION should be used for the null'
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' revision instead of None, as of bzr 0.91.',
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DeprecationWarning, stacklevel=2)
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from bzrlib.trace import mutter
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a_ancestors = find_present_ancestors(revision_a, revision_source)
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b_ancestors = find_present_ancestors(revision_b, revision_source)
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# a_order is used as a tie-breaker when two equally-good bases are found
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for revision, (a_order, a_distance) in a_ancestors.iteritems():
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if b_ancestors.has_key(revision):
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a_intersection.append((a_distance, a_order, revision))
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b_intersection.append((b_ancestors[revision][1], a_order, revision))
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mutter("a intersection: %r" % a_intersection)
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mutter("b intersection: %r" % b_intersection)
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def get_closest(intersection):
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for entry in intersection:
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if entry[0] == intersection[0][0]:
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matches.append(entry[2])
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a_closest = get_closest(a_intersection)
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if len(a_closest) == 0:
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b_closest = get_closest(b_intersection)
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assert len(b_closest) != 0
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mutter ("a_closest %r" % a_closest)
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mutter ("b_closest %r" % b_closest)
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if a_closest[0] in b_closest:
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elif b_closest[0] in a_closest:
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def is_null(revision_id):
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if revision_id is None:
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symbol_versioning.warn('NULL_REVISION should be used for the null'
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' revision instead of None, as of bzr 0.90.',
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DeprecationWarning, stacklevel=2)
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return revision_id in (None, NULL_REVISION)
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raise AmbiguousBase((a_closest[0], b_closest[0]))
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class MultipleRevisionSources(object):
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def __init__(self, *args):
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object.__init__(self)
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assert len(args) != 0
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self._revision_sources = args
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def get_revision(self, revision_id):
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for source in self._revision_sources:
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return source.get_revision(revision_id)
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except bzrlib.errors.NoSuchRevision, e:
added
removed
bzrlib/revision.py
