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# (C) 2005 Canonical
# 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
from xml import XMLMixin
try:
from cElementTree import Element, ElementTree, SubElement
except ImportError:
from elementtree.ElementTree import Element, ElementTree, SubElement
from errors import BzrError
class Revision(XMLMixin):
"""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.
:todo: Perhaps make predecessor be a child element, not an attribute?
"""
def __init__(self, **args):
self.inventory_id = None
self.revision_id = None
self.timestamp = None
self.message = None
self.timezone = None
self.committer = None
self.precursor = None
self.__dict__.update(args)
def __repr__(self):
return "<Revision id %s>" % self.revision_id
def to_element(self):
root = Element('revision',
committer = self.committer,
timestamp = '%.9f' % self.timestamp,
revision_id = self.revision_id,
inventory_id = self.inventory_id,
timezone = str(self.timezone))
if self.precursor:
root.set('precursor', self.precursor)
root.text = '\n'
msg = SubElement(root, 'message')
msg.text = self.message
msg.tail = '\n'
return root
def from_element(cls, elt):
# <changeset> is deprecated...
if elt.tag not in ('revision', 'changeset'):
raise BzrError("unexpected tag in revision file: %r" % elt)
cs = cls(committer = elt.get('committer'),
timestamp = float(elt.get('timestamp')),
precursor = elt.get('precursor'),
revision_id = elt.get('revision_id'),
inventory_id = elt.get('inventory_id'))
v = elt.get('timezone')
cs.timezone = v and int(v)
cs.message = elt.findtext('message') # text of <message>
return cs
from_element = classmethod(from_element)
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