Mercurial > public > mercurial-scm > hg-stable

annotate mercurial/graphmod.py @ 10111:27457d31ae3f

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cmdutil: replace sys.maxint with None as default value in loglimit Semantically, it is better to use None over any other value when there is "no value". Using maxint in this context is quite hackish, and is not forward compatible.
author Nicolas Dumazet <nicdumz.commits@gmail.com>
date Mon, 14 Dec 2009 00:32:29 +0900
parents 4c844f16bf39
children d6512b3e9ac0
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1 # Revision graph generator for Mercurial
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2 #
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3 # Copyright 2008 Dirkjan Ochtman <dirkjan@ochtman.nl>
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4 # Copyright 2007 Joel Rosdahl <joel@rosdahl.net>
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5 #
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6 # This software may be used and distributed according to the terms of the
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7 # GNU General Public License version 2, incorporated herein by reference.
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8
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9 """supports walking the history as DAGs suitable for graphical output
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10
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11 The most basic format we use is that of::
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12
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13 (id, type, data, [parentids])
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14
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15 The node and parent ids are arbitrary integers which identify a node in the
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16 context of the graph returned. Type is a constant specifying the node type.
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17 Data depends on type.
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18 """
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19
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20 from mercurial.node import nullrev
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21
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22 CHANGESET = 'C'
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23
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24 def revisions(repo, start, stop):
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25 """cset DAG generator yielding (id, CHANGESET, ctx, [parentids]) tuples
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26
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27 This generator function walks through the revision history from revision
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28 start to revision stop (which must be less than or equal to start). It
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29 returns a tuple for each node. The node and parent ids are arbitrary
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30 integers which identify a node in the context of the graph returned.
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31 """
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32 cur = start
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33 while cur >= stop:
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34 ctx = repo[cur]
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35 parents = [p.rev() for p in ctx.parents() if p.rev() != nullrev]
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36 yield (cur, CHANGESET, ctx, sorted(parents))
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37 cur -= 1
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38
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39 def filerevs(repo, path, start, stop, limit=None):
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40 """file cset DAG generator yielding (id, CHANGESET, ctx, [parentids]) tuples
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41
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42 This generator function walks through the revision history of a single
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43 file from revision start down to revision stop.
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44 """
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45 filerev = len(repo.file(path)) - 1
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46 rev = stop + 1
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47 count = 0
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48 while filerev >= 0 and rev > stop:
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49 fctx = repo.filectx(path, fileid=filerev)
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50 parents = [f.linkrev() for f in fctx.parents() if f.path() == path]
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51 rev = fctx.rev()
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52 if rev <= start:
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53 yield (rev, CHANGESET, fctx.changectx(), sorted(parents))
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54 count += 1
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55 if count == limit:
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56 break
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57 filerev -= 1
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58
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59 def nodes(repo, nodes):
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60 """cset DAG generator yielding (id, CHANGESET, ctx, [parentids]) tuples
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61
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62 This generator function walks the given nodes. It only returns parents
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63 that are in nodes, too.
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64 """
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65 include = set(nodes)
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66 for node in nodes:
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67 ctx = repo[node]
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68 parents = [p.rev() for p in ctx.parents() if p.node() in include]
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69 yield (ctx.rev(), CHANGESET, ctx, sorted(parents))
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70
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71 def colored(dag):
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72 """annotates a DAG with colored edge information
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73
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74 For each DAG node this function emits tuples::
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75
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76 (id, type, data, (col, color), [(col, nextcol, color)])
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77
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78 with the following new elements:
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79
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80 - Tuple (col, color) with column and color index for the current node
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81 - A list of tuples indicating the edges between the current node and its
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82 parents.
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83 """
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84 seen = []
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85 colors = {}
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86 newcolor = 1
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87 for (cur, type, data, parents) in dag:
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88
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89 # Compute seen and next
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90 if cur not in seen:
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91 seen.append(cur) # new head
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92 colors[cur] = newcolor
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93 newcolor += 1
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94
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95 col = seen.index(cur)
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96 color = colors.pop(cur)
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97 next = seen[:]
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98
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99 # Add parents to next
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100 addparents = [p for p in parents if p not in next]
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101 next[col:col + 1] = addparents
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102
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103 # Set colors for the parents
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104 for i, p in enumerate(addparents):
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105 if not i:
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106 colors[p] = color
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107 else:
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108 colors[p] = newcolor
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109 newcolor += 1
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110
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111 # Add edges to the graph
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112 edges = []
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113 for ecol, eid in enumerate(seen):
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114 if eid in next:
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115 edges.append((ecol, next.index(eid), colors[eid]))
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116 elif eid == cur:
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117 for p in parents:
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118 edges.append((ecol, next.index(p), colors[p]))
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119
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120 # Yield and move on
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121 yield (cur, type, data, (col, color), edges)
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122 seen = next