Mercurial > hg
annotate mercurial/graphmod.py @ 14077:c285bdb0572a
util.url: copy urllib.unquote() into util to improve startup times
The ui class uses util.hasscheme() in a couple of places, causing hg
to import urllib even when it doesn't need to. This copies
urllib.unquote() to avoid that import.
perfstartup time before the URL refactoring (8796fb6af67e):
! wall 0.050692 comb 0.000000 user 0.000000 sys 0.000000 (best of 100)
before this change:
! wall 0.064742 comb 0.000000 user 0.000000 sys 0.000000 (best of 100)
after this change:
! wall 0.052126 comb 0.000000 user 0.000000 sys 0.000000 (best of 100
author | Brodie Rao <brodie@bitheap.org> |
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date | Sat, 30 Apr 2011 09:43:23 -0700 |
parents | e4bfb9c337f3 |
children | f3d585c9b042 |
rev | line source |
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6691 | 1 # Revision graph generator for Mercurial |
2 # | |
3 # Copyright 2008 Dirkjan Ochtman <dirkjan@ochtman.nl> | |
4 # Copyright 2007 Joel Rosdahl <joel@rosdahl.net> | |
5 # | |
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6 # This software may be used and distributed according to the terms of the |
10263 | 7 # GNU General Public License version 2 or any later version. |
6691 | 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' |
6691 | 23 |
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24 def dagwalker(repo, revs): |
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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 revisions (which should be ordered |
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28 from bigger to lower). It returns a tuple for each node. The node and parent |
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29 ids are arbitrary integers which identify a node in the context of the graph |
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30 returned. |
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31 """ |
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32 if not revs: |
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33 return [] |
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34 |
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35 ns = [repo[r].node() for r in revs] |
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36 revdag = list(nodes(repo, ns)) |
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37 |
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38 cl = repo.changelog |
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39 lowestrev = min(revs) |
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40 gpcache = {} |
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41 leafs = {} |
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42 |
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43 for i, (id, c, ctx, parents) in enumerate(revdag): |
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44 mpars = [p.rev() for p in ctx.parents() if |
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45 p.rev() != nullrev and p.rev() not in parents] |
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46 grandparents = [] |
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47 |
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48 for mpar in mpars: |
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49 gp = gpcache.get(mpar) or grandparent(cl, lowestrev, revs, mpar) |
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50 gpcache[mpar] = gp |
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51 if gp is None: |
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52 leafs.setdefault(mpar, []).append((i, ctx)) |
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53 else: |
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54 grandparents.append(gp) |
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55 |
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56 if grandparents: |
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57 for gp in grandparents: |
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58 if gp not in revdag[i][3]: |
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59 revdag[i][3].append(gp) |
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60 |
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61 for parent, leafs in leafs.iteritems(): |
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62 for i, ctx in leafs: |
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63 revdag[i][3].append(parent) |
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64 |
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65 return revdag |
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66 |
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67 def nodes(repo, nodes): |
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68 """cset DAG generator yielding (id, CHANGESET, ctx, [parentids]) tuples |
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69 |
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70 This generator function walks the given nodes. It only returns parents |
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71 that are in nodes, too. |
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72 """ |
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73 include = set(nodes) |
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74 for node in nodes: |
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75 ctx = repo[node] |
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76 parents = set([p.rev() for p in ctx.parents() if p.node() in include]) |
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77 yield (ctx.rev(), CHANGESET, ctx, sorted(parents)) |
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78 |
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79 def colored(dag): |
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80 """annotates a DAG with colored edge information |
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81 |
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82 For each DAG node this function emits tuples:: |
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84 (id, type, data, (col, color), [(col, nextcol, color)]) |
6691 | 85 |
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86 with the following new elements: |
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87 |
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88 - Tuple (col, color) with column and color index for the current node |
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89 - A list of tuples indicating the edges between the current node and its |
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90 parents. |
6691 | 91 """ |
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92 seen = [] |
6691 | 93 colors = {} |
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94 newcolor = 1 |
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95 for (cur, type, data, parents) in dag: |
6691 | 96 |
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97 # Compute seen and next |
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98 if cur not in seen: |
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99 seen.append(cur) # new head |
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100 colors[cur] = newcolor |
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101 newcolor += 1 |
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103 col = seen.index(cur) |
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104 color = colors.pop(cur) |
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105 next = seen[:] |
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107 # Add parents to next |
6691 | 108 addparents = [p for p in parents if p not in next] |
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109 next[col:col + 1] = addparents |
6691 | 110 |
111 # Set colors for the parents | |
112 for i, p in enumerate(addparents): | |
113 if not i: | |
114 colors[p] = color | |
115 else: | |
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116 colors[p] = newcolor |
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117 newcolor += 1 |
6691 | 118 |
119 # Add edges to the graph | |
120 edges = [] | |
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121 for ecol, eid in enumerate(seen): |
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122 if eid in next: |
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123 edges.append((ecol, next.index(eid), colors[eid])) |
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124 elif eid == cur: |
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126 edges.append((ecol, next.index(p), color)) |
6691 | 127 |
128 # Yield and move on | |
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129 yield (cur, type, data, (col, color), edges) |
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130 seen = next |
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131 |
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132 |
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133 def grandparent(cl, lowestrev, roots, head): |
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134 """Return closest 'root' rev in topological path from 'roots' to 'head'. |
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135 |
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136 Derived from revlog.revlog.nodesbetween, but only returns next rev |
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137 of topologically sorted list of all nodes N that satisfy of these |
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138 constraints: |
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139 |
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140 1. N is a descendant of some node in 'roots' |
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141 2. N is an ancestor of 'head' |
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142 3. N is some node in 'roots' or nullrev |
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143 |
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144 Every node is considered to be both a descendant and an ancestor |
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145 of itself, so every reachable node in 'roots' and 'head' will be |
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146 included in 'nodes'. |
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147 """ |
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148 ancestors = set() |
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149 # Start at the top and keep marking parents until we're done. |
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150 revstotag = set([head]) |
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151 revstotag.discard(nullrev) |
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152 llowestrev = max(nullrev, lowestrev) |
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153 |
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154 while revstotag: |
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155 r = revstotag.pop() |
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156 # A node's revision number represents its place in a |
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157 # topologically sorted list of nodes. |
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158 if r >= llowestrev: |
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159 if r not in ancestors: |
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160 # If we are possibly a descendent of one of the roots |
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161 # and we haven't already been marked as an ancestor |
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162 ancestors.add(r) # Mark as ancestor |
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163 # Add non-nullrev parents to list of nodes to tag. |
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164 revstotag.update([p for p in cl.parentrevs(r)]) |
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165 |
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166 if not ancestors: |
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167 return |
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168 # Now that we have our set of ancestors, we want to remove any |
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169 # roots that are not ancestors. |
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170 |
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171 # If one of the roots was nullrev, everything is included anyway. |
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172 if lowestrev > nullrev: |
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173 # But, since we weren't, let's recompute the lowest rev to not |
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174 # include roots that aren't ancestors. |
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175 |
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176 # Filter out roots that aren't ancestors of heads |
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177 _roots = ancestors.intersection(roots) |
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178 if not _roots: |
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179 return |
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180 # Recompute the lowest revision |
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181 lowestrev = min(roots) |
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182 else: |
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183 # We are descending from nullrev, and don't need to care about |
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184 # any other roots. |
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185 lowestrev = nullrev |
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186 _roots = [nullrev] |
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187 |
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188 # The roots are just the descendants. |
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189 # Don't start at nullrev since we don't want nullrev in our output list, |
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190 # and if nullrev shows up in descedents, empty parents will look like |
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191 # they're descendents. |
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192 lowestrevisnullrev = (lowestrev == nullrev) |
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193 for r in xrange(head - 1, max(lowestrev, -1) - 1, -1): |
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194 if lowestrevisnullrev or r in _roots: |
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195 pass |
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196 elif _roots.issuperset(cl.parentrevs(r)): |
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197 # A node is a descendent if either of its parents are |
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198 # descendents. (We seeded the dependents list with the roots |
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199 # up there, remember?) |
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200 _roots.add(r) |
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201 else: |
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202 continue |
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203 if r in ancestors: |
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204 # Only include nodes that are both descendents and ancestors. |
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205 return r |