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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 Revision(object):
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from xml import XMLMixin
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from cElementTree import Element, ElementTree, SubElement
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from elementtree.ElementTree import Element, ElementTree, SubElement
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from errors import BzrError
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class Revision(XMLMixin):
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"""Single revision on a branch.
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Revisions may know their revision_hash, but only once they've been
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written out. This is not stored because you cannot write the hash
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into the file it describes.
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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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TODO: Perhaps make predecessor be a child element, not an attribute?
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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.inventory_id = None
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self.revision_id = None
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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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def iter_ancestors(revision_id, revision_source, only_present=False):
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ancestors = (revision_id,)
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while len(ancestors) > 0:
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for ancestor in ancestors:
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yield ancestor, distance
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revision = revision_source.get_revision(ancestor)
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except errors.NoSuchRevision, e:
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if e.revision == revision_id:
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yield ancestor, distance
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new_ancestors.extend(revision.parent_ids)
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ancestors = new_ancestors
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def find_present_ancestors(revision_id, revision_source):
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"""Return the ancestors of a revision present in a branch.
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It's possible that a branch won't have the complete ancestry of
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one of its revisions.
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anc_iter = enumerate(iter_ancestors(revision_id, revision_source,
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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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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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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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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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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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timezone = str(self.timezone))
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root.set('precursor', self.precursor)
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msg = SubElement(root, 'message')
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msg.text = self.message
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def from_element(cls, elt):
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# <changeset> is deprecated...
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if elt.tag not in ('revision', 'changeset'):
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raise BzrError("unexpected tag in revision file: %r" % elt)
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cs = cls(committer = elt.get('committer'),
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timestamp = float(elt.get('timestamp')),
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precursor = elt.get('precursor'),
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revision_id = elt.get('revision_id'),
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inventory_id = elt.get('inventory_id'))
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v = elt.get('timezone')
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cs.timezone = v and int(v)
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cs.message = elt.findtext('message') # text of <message>
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from_element = classmethod(from_element)
added
removed
bzrlib/revision.py
