25
24
except ImportError:
26
25
from elementtree.ElementTree import Element, ElementTree, SubElement
27
from errors import BzrError
30
class RevisionReference:
32
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):
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if revision_id == None \
40
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:
46
if isinstance(revision_sha1, basestring) \
47
and len(revision_sha1) == 40:
48
self.revision_sha1 = revision_sha1
50
raise ValueError('bad revision_sha1 %r' % revision_sha1)
29
54
class Revision(XMLMixin):
30
55
"""Single revision on a branch.
33
58
written out. This is not stored because you cannot write the hash
34
59
into the file it describes.
36
:todo: Perhaps make predecessor be a child element, not an attribute?
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After bzr 0.0.5 revisions are allowed to have multiple parents.
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To support old clients this is written out in a slightly redundant
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form: the first parent as the predecessor. This will eventually
67
List of parent revisions, each is a RevisionReference.
38
77
def __init__(self, **args):
39
self.inventory_id = None
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self.revision_id = None
44
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self.__dict__.update(args)
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def _get_precursor(self):
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from warnings import warn
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warn("Revision.precursor is deprecated", stacklevel=2)
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return self.parents[0].revision_id
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def _get_precursor_sha1(self):
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from warnings import warn
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warn("Revision.precursor_sha1 is deprecated", stacklevel=2)
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return self.parents[0].revision_sha1
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raise Exception("can't assign to precursor anymore")
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precursor = property(_get_precursor, _fail, _fail)
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precursor_sha1 = property(_get_precursor_sha1, _fail, _fail)
47
108
def __repr__(self):
49
return "<Revision id %s>" % self.revision_id
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return "<Revision id %s>" % self.revision_id
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112
def to_element(self):
55
115
timestamp = '%.9f' % self.timestamp,
56
116
revision_id = self.revision_id,
57
117
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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inventory_sha1 = self.inventory_sha1,
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root.set('timezone', str(self.timezone))
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124
msg = SubElement(root, 'message')
64
125
msg.text = self.message
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# first parent stored as precursor for compatability with 0.0.5 and
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assert pr.revision_id
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root.set('precursor', pr.revision_id)
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root.set('precursor_sha1', pr.revision_sha1)
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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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assert rr.revision_id
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p.set('revision_id', rr.revision_id)
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p.set('revision_sha1', rr.revision_sha1)
70
152
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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bailout("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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return unpack_revision(elt)
87
155
from_element = classmethod(from_element)
159
def unpack_revision(elt):
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"""Convert XML element into Revision object."""
161
# <changeset> is deprecated...
162
if elt.tag not in ('revision', 'changeset'):
163
raise BzrError("unexpected tag in revision file: %r" % elt)
165
rev = Revision(committer = elt.get('committer'),
166
timestamp = float(elt.get('timestamp')),
167
revision_id = elt.get('revision_id'),
168
inventory_id = elt.get('inventory_id'),
169
inventory_sha1 = elt.get('inventory_sha1')
172
precursor = elt.get('precursor')
173
precursor_sha1 = elt.get('precursor_sha1')
175
pelts = elt.find('parents')
178
# revisions written prior to 0.0.5 have a single precursor
179
# give as an attribute
180
rev_ref = RevisionReference(precursor, precursor_sha1)
181
rev.parents.append(rev_ref)
184
assert p.tag == 'revision_ref', \
185
"bad parent node tag %r" % p.tag
186
rev_ref = RevisionReference(p.get('revision_id'),
187
p.get('revision_sha1'))
188
rev.parents.append(rev_ref)
190
v = elt.get('timezone')
191
rev.timezone = v and int(v)
193
rev.message = elt.findtext('message') # text of <message>