30
29
self.message = self.revision_id
32
class RevisionProxy(object):
33
"""A revision proxy object.
35
This will demand load the revision it represents when the committer or
36
message attributes are accessed in order to populate them. It is
37
constructed with the revision id and parent_ids list and a repository
38
object to request the revision from when needed.
41
def __init__(self, revid, parent_ids, repository):
42
self.revision_id = revid
43
self.parent_ids = parent_ids
44
self._repository = repository
47
def _get_attribute_getter(attr):
48
def get_attribute(self):
49
if self._revision is None:
51
return getattr(self._revision, attr)
53
committer = property(_get_attribute_getter('committer'))
54
message = property(_get_attribute_getter('message'))
55
properties = property(_get_attribute_getter('properties'))
56
timestamp = property(_get_attribute_getter('timestamp'))
57
timezone = property(_get_attribute_getter('timezone'))
60
"""Load the revision object."""
61
self._revision = self._repository.get_revision(self.revision_id)
64
class DistanceMethod(object):
66
def __init__(self, branch, start):
71
self.children_of_id = {start: set()}
72
self.parent_ids_of = {}
73
self.colours = { start: 0 }
75
self.direct_parent_of = {}
78
def fill_caches(self):
79
graph = self.branch.repository.get_revision_graph_with_ghosts([self.start])
80
for revid in graph.ghosts:
81
self.cache_revision(DummyRevision(revid))
82
for revid, parents in graph.get_ancestors().items():
83
self.cache_revision(RevisionProxy(revid, parents, self.branch.repository))
85
def cache_revision(self, revision):
86
"Set the caches for a newly retrieved revision."""
87
revid = revision.revision_id
88
# Build a revision cache
89
self.revisions[revid] = revision
90
# Build a children dictionary
91
for parent_id in revision.parent_ids:
92
self.children_of_id.setdefault(parent_id, set()).add(revision)
93
# Build a parents dictionnary, where redundant parents will be removed,
94
# and that will be passed along tothe rest of program.
95
if len(revision.parent_ids) != len(set(revision.parent_ids)):
96
# fix the parent_ids list.
98
parent_ids_set = set()
99
for parent_id in revision.parent_ids:
100
if parent_id in parent_ids_set:
102
parent_ids.append(parent_id)
103
parent_ids_set.add(parent_id)
104
revision.parent_ids = parent_ids
105
self.parent_ids_of[revision] = list(revision.parent_ids)
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self.graph[revid] = revision.parent_ids
108
def make_children_map(self):
109
revisions = self.revisions
110
return dict((revisions[revid], c)
111
for (revid, c) in self.children_of_id.iteritems())
113
def sort_revisions(self, sorted_revids, maxnum):
114
revisions = self.revisions
115
parent_ids_of = self.parent_ids_of
116
children_of_id = self.children_of_id
117
# Try to compact sequences of revisions on the same branch.
120
expected_id = sorted_revids[0]
123
revid = sorted_revids.pop(0)
124
if revid != expected_id:
125
skipped_revids.append(revid)
127
revision = revisions[revid]
128
for child in children_of_id[revid]:
129
# postpone if any child is missing
130
if child.revision_id not in distances:
131
if expected_id not in pending_ids:
132
pending_ids.append(expected_id)
133
expected_id = pending_ids.pop(0)
134
skipped_revids.append(revid)
135
sorted_revids[:0] = skipped_revids
136
del skipped_revids[:]
139
# all children are here, push!
140
distances[revid] = len(distances)
141
if maxnum is not None and len(distances) > maxnum:
142
# bail out early if a limit was specified
143
sorted_revids[:0] = skipped_revids
144
for revid in sorted_revids:
145
distances[revid] = len(distances)
147
# all parents will need to be pushed as soon as possible
148
for parent in parent_ids_of[revision]:
149
if parent not in pending_ids:
150
pending_ids.insert(0, parent)
153
expected_id = pending_ids.pop(0)
154
# if the next expected revid has already been skipped, requeue
155
# the skipped ids, except those that would go right back to the
157
if expected_id in skipped_revids:
158
pos = skipped_revids.index(expected_id)
159
sorted_revids[:0] = skipped_revids[pos:]
160
del skipped_revids[pos:]
161
self.distances = distances
162
return sorted(distances, key=distances.get)
164
def choose_colour(self, revid):
165
revision = self.revisions[revid]
166
children_of_id = self.children_of_id
167
parent_ids_of = self.parent_ids_of
168
colours = self.colours
170
the_children = children_of_id[revid]
171
if len(the_children) == 1:
172
[child] = the_children
173
if len(parent_ids_of[child]) == 1:
174
# one-one relationship between parent and child, same
176
colours[revid] = colours[child.revision_id]
178
self.choose_colour_one_child(revision, child)
180
self.choose_colour_many_children(revision, the_children)
182
def choose_colour_one_child(self, revision, child):
183
revid = revision.revision_id
184
direct_parent_of = self.direct_parent_of
185
revisions = self.revisions
186
# one child with multiple parents, the first parent with
187
# the same committer gets the colour
188
direct_parent = direct_parent_of.get(child)
189
if direct_parent is None:
190
# if it has not been found yet, find it now and remember
191
for parent_id in self.parent_ids_of[child]:
192
parent_revision = revisions[parent_id]
193
if parent_revision.committer == child.committer:
194
# found the first parent with the same committer
195
direct_parent = parent_revision
196
direct_parent_of[child] = direct_parent
198
if direct_parent == revision:
199
self.colours[revid] = self.colours[child.revision_id]
201
self.colours[revid] = self.last_colour = self.last_colour + 1
203
def choose_colour_many_children(self, revision, the_children):
204
"""Colour revision revision."""
205
revid = revision.revision_id
206
direct_parent_of = self.direct_parent_of
207
# multiple children, get the colour of the last displayed child
208
# with the same committer which does not already have its colour
211
for child in the_children:
212
if child.committer != revision.committer:
214
direct_parent = direct_parent_of.get(child)
215
if direct_parent == revision:
216
self.colours[revid] = self.colours[child.revision_id]
218
# FIXME: Colouring based on whats been displayed MUST be done with
219
# knowledge of the revisions being output.
220
# until the refactoring to fold graph() into this more compactly is
221
# done, I've disabled this reuse. RBC 20060403
222
# if direct_parent is None:
223
# available[child] = distances[child.revision_id]
224
# .. it will be something like available[child] = \
225
# revs[child.revision_id][0] - which is the sequence number
228
sorted_children = sorted(available, key=available.get)
229
child = sorted_children[-1]
230
direct_parent_of[child] = revision
231
self.colours[revid] = self.colours[child.revision_id]
233
# no candidate children is available, pick the next
235
self.colours[revid] = self.last_colour = self.last_colour + 1
33
238
def distances(branch, start):
34
239
"""Sort the revisions.
40
245
Returns a tuple of (revids, revisions, colours, children)
42
revisions = { start: branch.get_revision(start) }
43
children = { revisions[start]: set() }
44
distances = { start: 0 }
45
colours = { start: 0 }
48
# Sort the revisions; the fastest way to do this is to visit each node
49
# as few times as possible (by keeping the todo list in a set) and record
50
# the largest distance to it before queuing up the children if we
51
# increased the distance. This produces the sort order we desire
55
revision = revisions[revid]
56
distance = distances[revid] + 1
57
colour = colours[revid]
59
for parent_id in revision.parent_ids:
60
# Check whether there's any point re-processing this
61
if parent_id in distances and distances[parent_id] >= distance:
64
# Get the parent from the cache, or put it in the cache
66
parent = revisions[parent_id]
67
children[parent].add(revision)
70
parent = revisions[parent_id] \
71
= branch.get_revision(parent_id)
72
except NoSuchRevision:
73
parent = revisions[parent_id] = DummyRevision(parent_id)
75
children[parent] = set([ revision ])
77
# Penalise revisions a little at a fork if we think they're on
78
# the same branch -- this makes the few few (at least) revisions
79
# of a branch appear straight after the fork
80
if same_branch(revision, parent):
81
colours[parent_id] = colour
82
if len(revision.parent_ids) > 1:
83
distances[parent_id] = distance + 10
85
distances[parent_id] = distance
87
colours[parent_id] = last_colour = last_colour + 1
88
distances[parent_id] = distance
92
return ( sorted(distances, key=distances.get), revisions, colours,
95
def graph(revids, revisions, colours):
247
distance = DistanceMethod(branch, start)
248
distance.fill_caches()
249
distance.merge_sorted = merge_sort(distance.graph, distance.start)
250
children = distance.make_children_map()
252
for seq, revid, merge_depth, end_of_merge in distance.merge_sorted:
253
distance.choose_colour(revid)
255
revisions = distance.revisions
256
colours = distance.colours
257
parent_ids_of = distance.parent_ids_of
258
return (revisions, colours, children, parent_ids_of, distance.merge_sorted)
261
def graph(revisions, colours, merge_sorted):
96
262
"""Produce a directed graph of a bzr branch.
98
264
For each revision it then yields a tuple of (revision, node, lines).
114
280
It's up to you how to actually draw the nodes and lines (straight,
115
281
curved, kinked, etc.) and to pick the actual colours for each index.
283
if not len(merge_sorted):
285
# split merge_sorted into a map:
287
# FIXME: get a hint on this from the merge_sorted data rather than
288
# calculating it ourselves
289
# mapping from rev_id to the sequence number of the next lowest rev
291
# mapping from rev_id to next-in-branch-revid - may be None for end
293
next_branch_revid = {}
294
# the stack we are in in the sorted data for determining which
295
# next_lower_rev to set. It is a stack which has one list at each
296
# depth - the ids at that depth that need the same id allocated.
298
for seq, revid, indent, end_merge in merge_sorted:
299
revs[revid] = (seq, indent, end_merge)
300
if indent == len(current_stack):
301
# new merge group starts
302
current_stack.append([revid])
303
elif indent == len(current_stack) - 1:
304
# part of the current merge group
305
current_stack[-1].append(revid)
307
# end of a merge group
308
while current_stack[-1]:
309
stack_rev_id = current_stack[-1].pop()
310
# record the next lower rev for this rev:
311
next_lower_rev[stack_rev_id] = seq
312
# if this followed a non-end-merge rev in this group note that
313
if len(current_stack[-1]):
314
if not revs[current_stack[-1][-1]][2]:
315
next_branch_revid[current_stack[-1][-1]] = stack_rev_id
317
# append to the now-current merge group
318
current_stack[-1].append(revid)
319
# assign a value to all the depth 0 revisions
320
while current_stack[-1]:
321
stack_rev_id = current_stack[-1].pop()
322
# record the next lower rev for this rev:
323
next_lower_rev[stack_rev_id] = len(merge_sorted)
324
# if this followed a non-end-merge rev in this group note that
325
if len(current_stack[-1]):
326
if not revs[current_stack[-1][-1]][2]:
327
next_branch_revid[current_stack[-1][-1]] = stack_rev_id
329
# a list of the current revisions we are drawing lines TO indicating
330
# the sequence of their lines on the screen.
331
# i.e. [A, B, C] means that the line to A, to B, and to C are in
332
# (respectively), 0, 1, 2 on the screen.
333
hanging = [merge_sorted[0][1]]
334
for seq, revid, indent, end_merge in merge_sorted:
335
# a list of the lines to draw: their position in the
336
# previous row, their position in this row, and the colour
337
# (which is the colour they are routing to).
123
342
for h_idx, hang in enumerate(hanging):
343
# one of these will be the current lines node:
344
# we are drawing a line. h_idx
124
345
if hang == revid:
125
# We've matched a hanging revision, so need to output a node
346
# we have found the current lines node
127
347
node = (h_idx, colours[revid])
349
# note that we might have done the main parent
350
drawn_parents = set()
352
def draw_line(from_idx, to_idx, revision_id):
354
n_idx = new_hanging.index(revision_id)
356
# force this to be vertical at the place this rev was
358
new_hanging.insert(to_idx, revision_id)
360
lines.append((from_idx, n_idx, colours[revision_id]))
363
# we want to draw a line to the next commit on 'this' branch
365
# drop this line first.
366
parent_id = next_branch_revid[revid]
367
draw_line(h_idx, h_idx, parent_id)
368
# we have drawn this parent
369
drawn_parents.add(parent_id)
371
# this is the last revision in a 'merge', show where it came from
372
if len(revisions[revid].parent_ids) > 1:
374
# parents means this commit was a merge, and being
375
# the end point of a merge group means that all
376
# the parent revisions were merged into branches
377
# to the left of this before this was committed
378
# - so we want to show this as a new branch from
380
# to do this, we show the parent with the lowest
381
# sequence number, which is the one that this
382
# branch 'spawned from', and no others.
383
# If this sounds like a problem, remember that:
384
# if the parent was not already in our mainline
385
# it would show up as a merge into this making
386
# this not the end of a merge-line.
387
lowest = len(merge_sorted)
388
for parent_id in revisions[revid].parent_ids:
389
if revs[parent_id][0] < lowest:
390
lowest = revs[parent_id][0]
391
assert lowest != len(merge_sorted)
392
draw_line(h_idx, len(new_hanging), merge_sorted[lowest][1])
393
drawn_parents.add(merge_sorted[lowest][1])
394
elif len(revisions[revid].parent_ids) == 1:
395
# only one parent, must show this link to be useful.
396
parent_id = revisions[revid].parent_ids[0]
397
draw_line(h_idx, len(new_hanging), parent_id)
398
drawn_parents.add(parent_id)
400
# what do we want to draw lines to from here:
401
# each parent IF its relevant.
129
403
# Now we need to hang its parents, we put them at the point
130
404
# the old column was so anything to the right of this has
131
405
# to move outwards to make room. We also try and collapse
132
406
# hangs to keep the graph small.
407
# RBC: we do not draw lines to parents that were already merged
408
# unless its the last revision in a merge group.
133
409
for parent_id in revisions[revid].parent_ids:
135
n_idx = new_hanging.index(parent_id)
137
n_idx = len(new_hanging)
138
new_hanging.append(parent_id)
139
lines.append((h_idx, n_idx, colours[parent_id]))
410
if parent_id in drawn_parents:
412
parent_seq = revs[parent_id][0]
413
parent_depth = revs[parent_id][1]
414
if parent_depth == indent + 1:
415
# The parent was a merge into this branch determine if
416
# it was already merged into the mainline via a
417
# different merge: if all revisions between us and
418
# parent_seq have a indent greater than there are no
419
# revisions with a lower indent than us.
420
# We do not use 'parent_depth < indent' because that
421
# would allow un-uniqueified merges to show up, and
422
# merge_sorted should take care of that for us (but
423
# does not trim the values)
424
if parent_seq < next_lower_rev[revid]:
425
draw_line(h_idx, len(new_hanging), parent_id)
426
elif parent_depth == indent and parent_seq == seq + 1:
427
# part of this branch
428
draw_line(h_idx, len(new_hanging), parent_id)
141
# Revision keeps on hanging, adjust for any change in the
142
# graph shape and try to collapse hangs to keep the graph
145
n_idx = new_hanging.index(hang)
147
n_idx = len(new_hanging)
148
new_hanging.append(hang)
149
lines.append((h_idx, n_idx, colours[hang]))
430
# draw a line from the previous position of this line to the
432
# h_idx is the old position.
433
# new_indent is the new position.
434
draw_line(h_idx, len(new_hanging), hang)
435
# we've calculated the row, assign new_hanging to hanging to setup for
150
437
hanging = new_hanging
152
439
yield (revisions[revid], node, lines)
154
442
def same_branch(a, b):
155
443
"""Return whether we think revisions a and b are on the same branch."""
156
444
if len(a.parent_ids) == 1: