Mercurial > hg
annotate contrib/synthrepo.py @ 21769:4a54d9f1b6b6
convert: define norepo in command decorator
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Sun, 04 May 2014 22:02:25 -0700 |
parents | 503bb3af70fe |
children | 054ec0212718 |
rev | line source |
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1 # synthrepo.py - repo synthesis |
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2 # |
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3 # Copyright 2012 Facebook |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
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6 # GNU General Public License version 2 or any later version. |
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7 |
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8 '''synthesize structurally interesting change history |
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9 |
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10 This extension is useful for creating a repository with properties |
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11 that are statistically similar to an existing repository. During |
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12 analysis, a simple probability table is constructed from the history |
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13 of an existing repository. During synthesis, these properties are |
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14 reconstructed. |
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15 |
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16 Properties that are analyzed and synthesized include the following: |
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17 |
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18 - Lines added or removed when an existing file is modified |
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19 - Number and sizes of files added |
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20 - Number of files removed |
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21 - Line lengths |
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22 - Topological distance to parent changeset(s) |
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23 - Probability of a commit being a merge |
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24 - Probability of a newly added file being added to a new directory |
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25 - Interarrival time, and time zone, of commits |
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26 |
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27 A few obvious properties that are not currently handled realistically: |
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28 |
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29 - Merges are treated as regular commits with two parents, which is not |
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30 realistic |
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31 - Modifications are not treated as operations on hunks of lines, but |
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32 as insertions and deletions of randomly chosen single lines |
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33 - Committer ID (always random) |
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34 - Executability of files |
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35 - Symlinks and binary files are ignored |
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36 ''' |
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37 |
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38 import bisect, collections, json, os, random, time, sys |
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39 from mercurial import cmdutil, context, patch, scmutil, util, hg |
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40 from mercurial.i18n import _ |
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41 from mercurial.node import nullrev, nullid |
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42 |
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43 testedwith = 'internal' |
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44 |
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45 cmdtable = {} |
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46 command = cmdutil.command(cmdtable) |
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47 |
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48 newfile = set(('new fi', 'rename', 'copy f', 'copy t')) |
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49 |
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50 def zerodict(): |
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51 return collections.defaultdict(lambda: 0) |
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52 |
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53 def roundto(x, k): |
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54 if x > k * 2: |
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55 return int(round(x / float(k)) * k) |
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56 return int(round(x)) |
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57 |
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58 def parsegitdiff(lines): |
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59 filename, mar, lineadd, lineremove = None, None, zerodict(), 0 |
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60 binary = False |
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61 for line in lines: |
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62 start = line[:6] |
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63 if start == 'diff -': |
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64 if filename: |
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65 yield filename, mar, lineadd, lineremove, binary |
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66 mar, lineadd, lineremove, binary = 'm', zerodict(), 0, False |
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67 filename = patch.gitre.match(line).group(1) |
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68 elif start in newfile: |
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69 mar = 'a' |
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70 elif start == 'GIT bi': |
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71 binary = True |
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72 elif start == 'delete': |
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73 mar = 'r' |
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74 elif start: |
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75 s = start[0] |
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76 if s == '-' and not line.startswith('--- '): |
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77 lineremove += 1 |
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78 elif s == '+' and not line.startswith('+++ '): |
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79 lineadd[roundto(len(line) - 1, 5)] += 1 |
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80 if filename: |
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81 yield filename, mar, lineadd, lineremove, binary |
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82 |
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83 @command('analyze', |
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84 [('o', 'output', [], _('write output to given file'), _('FILE')), |
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85 ('r', 'rev', [], _('analyze specified revisions'), _('REV'))], |
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86 _('hg analyze')) |
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87 def analyze(ui, repo, *revs, **opts): |
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88 '''create a simple model of a repository to use for later synthesis |
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89 |
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90 This command examines every changeset in the given range (or all |
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91 of history if none are specified) and creates a simple statistical |
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92 model of the history of the repository. |
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93 |
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94 The model is written out to a JSON file, and can be used by |
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95 :hg:`synthesize` to create or augment a repository with synthetic |
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96 commits that have a structure that is statistically similar to the |
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97 analyzed repository. |
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98 ''' |
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99 |
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100 revs = list(revs) |
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101 revs.extend(opts['rev']) |
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102 if not revs: |
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103 revs = [':'] |
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104 |
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105 output = opts['output'] |
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106 if not output: |
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107 output = os.path.basename(repo.root) + '.json' |
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108 |
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109 if output == '-': |
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110 fp = sys.stdout |
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111 else: |
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112 fp = open(output, 'w') |
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113 |
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114 revs = scmutil.revrange(repo, revs) |
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115 revs.sort() |
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116 |
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117 lineschanged = zerodict() |
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118 children = zerodict() |
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119 p1distance = zerodict() |
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120 p2distance = zerodict() |
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121 linesinfilesadded = zerodict() |
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122 fileschanged = zerodict() |
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123 filesadded = zerodict() |
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124 filesremoved = zerodict() |
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125 linelengths = zerodict() |
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126 interarrival = zerodict() |
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127 parents = zerodict() |
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128 dirsadded = zerodict() |
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129 tzoffset = zerodict() |
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130 |
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131 progress = ui.progress |
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132 _analyzing = _('analyzing') |
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133 _changesets = _('changesets') |
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134 _total = len(revs) |
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135 |
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136 for i, rev in enumerate(revs): |
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137 progress(_analyzing, i, unit=_changesets, total=_total) |
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138 ctx = repo[rev] |
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139 pl = ctx.parents() |
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140 pctx = pl[0] |
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141 prev = pctx.rev() |
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142 children[prev] += 1 |
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143 p1distance[rev - prev] += 1 |
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144 parents[len(pl)] += 1 |
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145 tzoffset[ctx.date()[1]] += 1 |
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146 if len(pl) > 1: |
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147 p2distance[rev - pl[1].rev()] += 1 |
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148 if prev == rev - 1: |
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149 lastctx = pctx |
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150 else: |
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151 lastctx = repo[rev - 1] |
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152 if lastctx.rev() != nullrev: |
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153 interarrival[roundto(ctx.date()[0] - lastctx.date()[0], 300)] += 1 |
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154 diff = sum((d.splitlines() |
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155 for d in ctx.diff(pctx, opts={'git': True})), []) |
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156 fileadds, diradds, fileremoves, filechanges = 0, 0, 0, 0 |
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157 for filename, mar, lineadd, lineremove, binary in parsegitdiff(diff): |
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158 if binary: |
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159 continue |
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160 added = sum(lineadd.itervalues(), 0) |
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161 if mar == 'm': |
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162 if added and lineremove: |
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163 lineschanged[roundto(added, 5), roundto(lineremove, 5)] += 1 |
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164 filechanges += 1 |
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165 elif mar == 'a': |
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166 fileadds += 1 |
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167 if '/' in filename: |
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168 filedir = filename.rsplit('/', 1)[0] |
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169 if filedir not in pctx.dirs(): |
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170 diradds += 1 |
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171 linesinfilesadded[roundto(added, 5)] += 1 |
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172 elif mar == 'r': |
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173 fileremoves += 1 |
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174 for length, count in lineadd.iteritems(): |
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175 linelengths[length] += count |
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176 fileschanged[filechanges] += 1 |
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177 filesadded[fileadds] += 1 |
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178 dirsadded[diradds] += 1 |
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179 filesremoved[fileremoves] += 1 |
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180 |
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181 invchildren = zerodict() |
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182 |
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183 for rev, count in children.iteritems(): |
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184 invchildren[count] += 1 |
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185 |
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186 if output != '-': |
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187 ui.status(_('writing output to %s\n') % output) |
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188 |
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189 def pronk(d): |
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190 return sorted(d.iteritems(), key=lambda x: x[1], reverse=True) |
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191 |
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192 json.dump({'revs': len(revs), |
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193 'lineschanged': pronk(lineschanged), |
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194 'children': pronk(invchildren), |
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195 'fileschanged': pronk(fileschanged), |
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196 'filesadded': pronk(filesadded), |
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197 'linesinfilesadded': pronk(linesinfilesadded), |
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198 'dirsadded': pronk(dirsadded), |
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199 'filesremoved': pronk(filesremoved), |
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200 'linelengths': pronk(linelengths), |
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201 'parents': pronk(parents), |
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202 'p1distance': pronk(p1distance), |
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203 'p2distance': pronk(p2distance), |
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204 'interarrival': pronk(interarrival), |
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205 'tzoffset': pronk(tzoffset), |
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206 }, |
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207 fp) |
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208 fp.close() |
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209 |
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210 @command('synthesize', |
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211 [('c', 'count', 0, _('create given number of commits'), _('COUNT')), |
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212 ('', 'dict', '', _('path to a dictionary of words'), _('FILE'))], |
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213 _('hg synthesize [OPTION].. DESCFILE')) |
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214 def synthesize(ui, repo, descpath, **opts): |
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215 '''synthesize commits based on a model of an existing repository |
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216 |
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217 The model must have been generated by :hg:`analyze`. Commits will |
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218 be generated randomly according to the probabilities described in |
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219 the model. |
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220 |
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221 When synthesizing new content, commit descriptions, and user |
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222 names, words will be chosen randomly from a dictionary that is |
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223 presumed to contain one word per line. Use --dict to specify the |
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224 path to an alternate dictionary to use. |
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225 ''' |
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226 try: |
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227 fp = hg.openpath(ui, descpath) |
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228 except Exception, err: |
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229 raise util.Abort('%s: %s' % (descpath, err[0].strerror)) |
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230 desc = json.load(fp) |
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231 fp.close() |
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232 |
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233 def cdf(l): |
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234 if not l: |
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235 return [], [] |
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236 vals, probs = zip(*sorted(l, key=lambda x: x[1], reverse=True)) |
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237 t = float(sum(probs, 0)) |
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238 s, cdfs = 0, [] |
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239 for v in probs: |
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240 s += v |
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241 cdfs.append(s / t) |
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242 return vals, cdfs |
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243 |
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244 lineschanged = cdf(desc['lineschanged']) |
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245 fileschanged = cdf(desc['fileschanged']) |
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246 filesadded = cdf(desc['filesadded']) |
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247 dirsadded = cdf(desc['dirsadded']) |
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248 filesremoved = cdf(desc['filesremoved']) |
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249 linelengths = cdf(desc['linelengths']) |
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250 parents = cdf(desc['parents']) |
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251 p1distance = cdf(desc['p1distance']) |
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252 p2distance = cdf(desc['p2distance']) |
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253 interarrival = cdf(desc['interarrival']) |
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254 linesinfilesadded = cdf(desc['linesinfilesadded']) |
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255 tzoffset = cdf(desc['tzoffset']) |
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256 |
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257 dictfile = opts.get('dict') or '/usr/share/dict/words' |
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258 try: |
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259 fp = open(dictfile, 'rU') |
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260 except IOError, err: |
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261 raise util.Abort('%s: %s' % (dictfile, err.strerror)) |
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262 words = fp.read().splitlines() |
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263 fp.close() |
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264 |
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265 def pick(cdf): |
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266 return cdf[0][bisect.bisect_left(cdf[1], random.random())] |
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267 |
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268 def makeline(minimum=0): |
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269 total = max(minimum, pick(linelengths)) |
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270 c, l = 0, [] |
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271 while c < total: |
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272 w = random.choice(words) |
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273 c += len(w) + 1 |
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274 l.append(w) |
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275 return ' '.join(l) |
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276 |
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277 wlock = repo.wlock() |
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278 lock = repo.lock() |
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279 |
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280 nevertouch = set(('.hgsub', '.hgignore', '.hgtags')) |
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281 |
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282 progress = ui.progress |
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283 _synthesizing = _('synthesizing') |
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284 _changesets = _('changesets') |
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285 |
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286 count = int(opts['count']) |
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287 heads = set(map(repo.changelog.rev, repo.heads())) |
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288 for i in xrange(count): |
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289 progress(_synthesizing, i, unit=_changesets, total=count) |
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290 |
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291 node = repo.changelog.node |
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292 revs = len(repo) |
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293 |
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294 def pickhead(heads, distance): |
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295 if heads: |
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296 lheads = sorted(heads) |
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297 rev = revs - min(pick(distance), revs) |
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298 if rev < lheads[-1]: |
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299 rev = lheads[bisect.bisect_left(lheads, rev)] |
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300 else: |
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301 rev = lheads[-1] |
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302 return rev, node(rev) |
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303 return nullrev, nullid |
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304 |
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305 r1 = revs - min(pick(p1distance), revs) |
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306 p1 = node(r1) |
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307 |
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308 # the number of heads will grow without bound if we use a pure |
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309 # model, so artificially constrain their proliferation |
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310 if pick(parents) == 2 or len(heads) > random.randint(1, 20): |
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311 r2, p2 = pickhead(heads.difference([r1]), p2distance) |
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312 else: |
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313 r2, p2 = nullrev, nullid |
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314 |
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315 pl = [p1, p2] |
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316 pctx = repo[r1] |
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317 mf = pctx.manifest() |
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318 mfk = mf.keys() |
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319 changes = {} |
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320 if mfk: |
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321 for __ in xrange(pick(fileschanged)): |
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322 for __ in xrange(10): |
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323 fctx = pctx.filectx(random.choice(mfk)) |
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324 path = fctx.path() |
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325 if not (path in nevertouch or fctx.isbinary() or |
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326 'l' in fctx.flags()): |
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327 break |
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328 lines = fctx.data().splitlines() |
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329 add, remove = pick(lineschanged) |
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330 for __ in xrange(remove): |
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331 if not lines: |
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332 break |
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333 del lines[random.randrange(0, len(lines))] |
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334 for __ in xrange(add): |
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335 lines.insert(random.randint(0, len(lines)), makeline()) |
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336 path = fctx.path() |
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337 changes[path] = context.memfilectx(repo, path, |
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338 '\n'.join(lines) + '\n') |
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339 for __ in xrange(pick(filesremoved)): |
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340 path = random.choice(mfk) |
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341 for __ in xrange(10): |
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342 path = random.choice(mfk) |
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343 if path not in changes: |
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344 changes[path] = None |
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345 break |
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346 if filesadded: |
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347 dirs = list(pctx.dirs()) |
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348 dirs.append('') |
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349 for __ in xrange(pick(filesadded)): |
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350 path = [random.choice(dirs)] |
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351 if pick(dirsadded): |
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352 path.append(random.choice(words)) |
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353 path.append(random.choice(words)) |
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354 path = '/'.join(filter(None, path)) |
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355 data = '\n'.join(makeline() |
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356 for __ in xrange(pick(linesinfilesadded))) + '\n' |
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357 changes[path] = context.memfilectx(repo, path, data) |
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358 def filectxfn(repo, memctx, path): |
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359 data = changes[path] |
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360 if data is None: |
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361 raise IOError |
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362 return data |
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363 if not changes: |
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364 continue |
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365 if revs: |
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366 date = repo['tip'].date()[0] + pick(interarrival) |
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367 else: |
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368 date = time.time() - (86400 * count) |
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369 user = random.choice(words) + '@' + random.choice(words) |
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370 mc = context.memctx(repo, pl, makeline(minimum=2), |
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371 sorted(changes.iterkeys()), |
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372 filectxfn, user, '%d %d' % (date, pick(tzoffset))) |
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373 newnode = mc.commit() |
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374 heads.add(repo.changelog.rev(newnode)) |
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375 heads.discard(r1) |
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376 heads.discard(r2) |
619068c280fd
contrib: add a commit synthesizer for reproducing scaling problems
Bryan O'Sullivan <bryano@fb.com>
parents:
diff
changeset
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377 |
619068c280fd
contrib: add a commit synthesizer for reproducing scaling problems
Bryan O'Sullivan <bryano@fb.com>
parents:
diff
changeset
|
378 lock.release() |
619068c280fd
contrib: add a commit synthesizer for reproducing scaling problems
Bryan O'Sullivan <bryano@fb.com>
parents:
diff
changeset
|
379 wlock.release() |