69
70
def __repr__(self):
70
71
return "<Revision id %s>" % self.revision_id
74
from bzrlib.xml import Element, SubElement
76
root = Element('revision',
77
committer = self.committer,
78
timestamp = '%.9f' % self.timestamp,
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revision_id = self.revision_id,
80
inventory_id = self.inventory_id,
81
inventory_sha1 = self.inventory_sha1,
84
root.set('timezone', str(self.timezone))
87
msg = SubElement(root, 'message')
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msg.text = self.message
92
pelts = SubElement(root, 'parents')
93
pelts.tail = pelts.text = '\n'
94
for rr in self.parents:
95
assert isinstance(rr, RevisionReference)
96
p = SubElement(pelts, 'revision_ref')
99
p.set('revision_id', rr.revision_id)
101
p.set('revision_sha1', rr.revision_sha1)
106
def from_element(cls, elt):
107
return unpack_revision(elt)
109
from_element = classmethod(from_element)
113
def unpack_revision(elt):
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"""Convert XML element into Revision object."""
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# <changeset> is deprecated...
116
from bzrlib.errors import BzrError
118
if elt.tag not in ('revision', 'changeset'):
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raise 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'),
124
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'),
138
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')
152
rev.timezone = v and int(v)
154
rev.message = elt.findtext('message') # text of <message>
73
def __eq__(self, other):
74
if not isinstance(other, Revision):
76
return (self.inventory_id == other.inventory_id
77
and self.inventory_sha1 == other.inventory_sha1
78
and self.revision_id == other.revision_id
79
and self.timestamp == other.timestamp
80
and self.message == other.message
81
and self.timezone == other.timezone
82
and self.committer == other.committer)
84
def __ne__(self, other):
85
return not self.__eq__(other)
159
89
REVISION_ID_RE = None
168
98
if not REVISION_ID_RE.match(rid):
169
99
raise ValueError("malformed revision-id %r" % rid)
101
def is_ancestor(revision_id, candidate_id, revision_source):
102
"""Return true if candidate_id is an ancestor of revision_id.
103
A false negative will be returned if any intermediate descendent of
104
candidate_id is not present in any of the revision_sources.
106
revisions_source is an object supporting a get_revision operation that
107
behaves like Branch's.
110
for ancestor_id, distance in iter_ancestors(revision_id, revision_source):
111
if ancestor_id == candidate_id:
115
def iter_ancestors(revision_id, revision_source, only_present=False):
116
ancestors = (revision_id,)
118
while len(ancestors) > 0:
120
for ancestor in ancestors:
122
yield ancestor, distance
124
revision = revision_source.get_revision(ancestor)
125
except bzrlib.errors.NoSuchRevision, e:
126
if e.revision == revision_id:
131
yield ancestor, distance
132
new_ancestors.extend([p.revision_id for p in revision.parents])
133
ancestors = new_ancestors
137
def find_present_ancestors(revision_id, revision_source):
138
"""Return the ancestors of a revision present in a branch.
140
It's possible that a branch won't have the complete ancestry of
141
one of its revisions.
145
anc_iter = enumerate(iter_ancestors(revision_id, revision_source,
147
for anc_order, (anc_id, anc_distance) in anc_iter:
148
if not found_ancestors.has_key(anc_id):
149
found_ancestors[anc_id] = (anc_order, anc_distance)
150
return found_ancestors
153
def __get_closest(intersection):
156
for entry in intersection:
157
if entry[0] == intersection[0][0]:
158
matches.append(entry[2])
162
def common_ancestor(revision_a, revision_b, revision_source):
163
"""Find the ancestor common to both revisions that is closest to both.
165
from bzrlib.trace import mutter
166
a_ancestors = find_present_ancestors(revision_a, revision_source)
167
b_ancestors = find_present_ancestors(revision_b, revision_source)
170
# a_order is used as a tie-breaker when two equally-good bases are found
171
for revision, (a_order, a_distance) in a_ancestors.iteritems():
172
if b_ancestors.has_key(revision):
173
a_intersection.append((a_distance, a_order, revision))
174
b_intersection.append((b_ancestors[revision][1], a_order, revision))
175
mutter("a intersection: %r" % a_intersection)
176
mutter("b intersection: %r" % b_intersection)
178
a_closest = __get_closest(a_intersection)
179
if len(a_closest) == 0:
181
b_closest = __get_closest(b_intersection)
182
assert len(b_closest) != 0
183
mutter ("a_closest %r" % a_closest)
184
mutter ("b_closest %r" % b_closest)
185
if a_closest[0] in b_closest:
187
elif b_closest[0] in a_closest:
190
raise bzrlib.errors.AmbiguousBase((a_closest[0], b_closest[0]))
193
class MultipleRevisionSources(object):
194
"""Proxy that looks in multiple branches for revisions."""
195
def __init__(self, *args):
196
object.__init__(self)
197
assert len(args) != 0
198
self._revision_sources = args
200
def get_revision(self, revision_id):
201
for source in self._revision_sources:
203
return source.get_revision(revision_id)
204
except bzrlib.errors.NoSuchRevision, e:
208
def get_intervening_revisions(ancestor_id, rev_id, rev_source,
209
revision_history=None):
210
"""Find the longest line of descent from maybe_ancestor to revision.
211
Revision history is followed where possible.
213
If ancestor_id == rev_id, list will be empty.
214
Otherwise, rev_id will be the last entry. ancestor_id will never appear.
215
If ancestor_id is not an ancestor, NotAncestor will be thrown
217
[rev_source.get_revision(r) for r in (ancestor_id, rev_id)]
218
if ancestor_id == rev_id:
220
def historical_lines(line):
221
"""Return a tuple of historical/non_historical lines, for sorting.
222
The non_historical count is negative, since non_historical lines are
227
for revision in line:
228
if revision in revision_history:
232
return good_count, bad_count
234
successful_lines = []
235
while len(active) > 0:
238
parent_ids = [p.revision_id for p in
239
rev_source.get_revision(line[-1]).parents]
240
for parent in parent_ids:
242
if parent == ancestor_id:
243
successful_lines.append(line_copy)
245
line_copy.append(parent)
246
new_active.append(line_copy)
248
if len(successful_lines) == 0:
249
raise bzrlib.errors.NotAncestor(rev_id, ancestor_id)
250
for line in successful_lines:
252
if revision_history is not None:
253
by_historical_lines = []
254
for line in successful_lines:
255
count = historical_lines(line)
256
by_historical_lines.append((count, line))
257
by_historical_lines.sort()
258
if by_historical_lines[-1][0][0] > 0:
259
return by_historical_lines[-1][1]
260
assert len(successful_lines)
261
successful_lines.sort(cmp, len)
262
return successful_lines[-1]
added
removed
bzrlib/revision.py
