Mercurial > hg
annotate contrib/synthrepo.py @ 25344:ceaf04bb14ff
revset: add fast path for _list() of integer revisions
This can greatly speed up chained 'or' of integer revisions.
1) reduce nesting of chained 'or' operations
2) optimize to a list
3) fast path for integer revisions (this patch)
revset #0: 0 + 1 + 2 + ... + 1000
1) wall 0.483341 comb 0.480000 user 0.480000 sys 0.000000 (best of 20)
2) wall 0.025393 comb 0.020000 user 0.020000 sys 0.000000 (best of 107)
3) wall 0.008371 comb 0.000000 user 0.000000 sys 0.000000 (best of 317)
revset #1: sort(0 + 1 + 2 + ... + 1000)
1) wall 0.035240 comb 0.040000 user 0.040000 sys 0.000000 (best of 100)
2) wall 0.026432 comb 0.030000 user 0.030000 sys 0.000000 (best of 102)
3) wall 0.008418 comb 0.000000 user 0.000000 sys 0.000000 (best of 322)
revset #2: first(0 + 1 + 2 + ... + 1000)
1) wall 0.028949 comb 0.030000 user 0.030000 sys 0.000000 (best of 100)
2) wall 0.025503 comb 0.030000 user 0.030000 sys 0.000000 (best of 106)
3) wall 0.008423 comb 0.010000 user 0.010000 sys 0.000000 (best of 319)
But I admit that it is still slower than the spanset.
revset #3: 0:1000
3) wall 0.000132 comb 0.000000 user 0.000000 sys 0.000000 (best of 19010)
author | Yuya Nishihara <yuya@tcha.org> |
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date | Sun, 17 May 2015 15:16:13 +0900 |
parents | 80c5b2666a96 |
children | 328739ea70c3 |
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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 - Number of files in each directory |
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27 |
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28 A few obvious properties that are not currently handled realistically: |
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29 |
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30 - Merges are treated as regular commits with two parents, which is not |
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31 realistic |
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32 - Modifications are not treated as operations on hunks of lines, but |
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33 as insertions and deletions of randomly chosen single lines |
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34 - Committer ID (always random) |
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35 - Executability of files |
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36 - Symlinks and binary files are ignored |
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37 ''' |
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38 |
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39 import bisect, collections, itertools, json, os, random, time, sys |
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40 from mercurial import cmdutil, context, patch, scmutil, util, hg |
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41 from mercurial.i18n import _ |
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42 from mercurial.node import nullrev, nullid, short |
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43 |
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44 # Note for extension authors: ONLY specify testedwith = 'internal' for |
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45 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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46 # be specifying the version(s) of Mercurial they are tested with, or |
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47 # leave the attribute unspecified. |
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48 testedwith = 'internal' |
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49 |
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50 cmdtable = {} |
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51 command = cmdutil.command(cmdtable) |
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52 |
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53 newfile = set(('new fi', 'rename', 'copy f', 'copy t')) |
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54 |
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55 def zerodict(): |
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56 return collections.defaultdict(lambda: 0) |
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57 |
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58 def roundto(x, k): |
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59 if x > k * 2: |
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60 return int(round(x / float(k)) * k) |
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61 return int(round(x)) |
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62 |
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63 def parsegitdiff(lines): |
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64 filename, mar, lineadd, lineremove = None, None, zerodict(), 0 |
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65 binary = False |
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66 for line in lines: |
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67 start = line[:6] |
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68 if start == 'diff -': |
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69 if filename: |
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70 yield filename, mar, lineadd, lineremove, binary |
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71 mar, lineadd, lineremove, binary = 'm', zerodict(), 0, False |
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72 filename = patch.gitre.match(line).group(1) |
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73 elif start in newfile: |
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74 mar = 'a' |
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75 elif start == 'GIT bi': |
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76 binary = True |
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77 elif start == 'delete': |
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78 mar = 'r' |
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79 elif start: |
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80 s = start[0] |
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81 if s == '-' and not line.startswith('--- '): |
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82 lineremove += 1 |
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83 elif s == '+' and not line.startswith('+++ '): |
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84 lineadd[roundto(len(line) - 1, 5)] += 1 |
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85 if filename: |
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86 yield filename, mar, lineadd, lineremove, binary |
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87 |
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88 @command('analyze', |
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89 [('o', 'output', '', _('write output to given file'), _('FILE')), |
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90 ('r', 'rev', [], _('analyze specified revisions'), _('REV'))], |
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91 _('hg analyze'), optionalrepo=True) |
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92 def analyze(ui, repo, *revs, **opts): |
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93 '''create a simple model of a repository to use for later synthesis |
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94 |
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95 This command examines every changeset in the given range (or all |
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96 of history if none are specified) and creates a simple statistical |
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97 model of the history of the repository. It also measures the directory |
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98 structure of the repository as checked out. |
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99 |
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100 The model is written out to a JSON file, and can be used by |
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101 :hg:`synthesize` to create or augment a repository with synthetic |
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102 commits that have a structure that is statistically similar to the |
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103 analyzed repository. |
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104 ''' |
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105 root = repo.root |
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106 if not root.endswith(os.path.sep): |
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107 root += os.path.sep |
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108 |
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109 revs = list(revs) |
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110 revs.extend(opts['rev']) |
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111 if not revs: |
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112 revs = [':'] |
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113 |
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114 output = opts['output'] |
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115 if not output: |
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116 output = os.path.basename(root) + '.json' |
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117 |
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118 if output == '-': |
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119 fp = sys.stdout |
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120 else: |
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121 fp = open(output, 'w') |
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122 |
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123 # Always obtain file counts of each directory in the given root directory. |
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124 def onerror(e): |
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125 ui.warn(_('error walking directory structure: %s\n') % e) |
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126 |
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127 dirs = {} |
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128 rootprefixlen = len(root) |
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129 for dirpath, dirnames, filenames in os.walk(root, onerror=onerror): |
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130 dirpathfromroot = dirpath[rootprefixlen:] |
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131 dirs[dirpathfromroot] = len(filenames) |
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132 if '.hg' in dirnames: |
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133 dirnames.remove('.hg') |
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134 |
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135 lineschanged = zerodict() |
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136 children = zerodict() |
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137 p1distance = zerodict() |
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138 p2distance = zerodict() |
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139 linesinfilesadded = zerodict() |
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140 fileschanged = zerodict() |
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141 filesadded = zerodict() |
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142 filesremoved = zerodict() |
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143 linelengths = zerodict() |
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144 interarrival = zerodict() |
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145 parents = zerodict() |
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146 dirsadded = zerodict() |
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147 tzoffset = zerodict() |
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148 |
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149 # If a mercurial repo is available, also model the commit history. |
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150 if repo: |
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151 revs = scmutil.revrange(repo, revs) |
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152 revs.sort() |
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153 |
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154 progress = ui.progress |
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155 _analyzing = _('analyzing') |
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156 _changesets = _('changesets') |
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157 _total = len(revs) |
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158 |
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159 for i, rev in enumerate(revs): |
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160 progress(_analyzing, i, unit=_changesets, total=_total) |
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161 ctx = repo[rev] |
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162 pl = ctx.parents() |
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163 pctx = pl[0] |
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164 prev = pctx.rev() |
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165 children[prev] += 1 |
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166 p1distance[rev - prev] += 1 |
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167 parents[len(pl)] += 1 |
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168 tzoffset[ctx.date()[1]] += 1 |
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169 if len(pl) > 1: |
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170 p2distance[rev - pl[1].rev()] += 1 |
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171 if prev == rev - 1: |
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172 lastctx = pctx |
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173 else: |
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174 lastctx = repo[rev - 1] |
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175 if lastctx.rev() != nullrev: |
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176 timedelta = ctx.date()[0] - lastctx.date()[0] |
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177 interarrival[roundto(timedelta, 300)] += 1 |
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178 diff = sum((d.splitlines() for d in ctx.diff(pctx, git=True)), []) |
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179 fileadds, diradds, fileremoves, filechanges = 0, 0, 0, 0 |
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180 for filename, mar, lineadd, lineremove, isbin in parsegitdiff(diff): |
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181 if isbin: |
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182 continue |
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183 added = sum(lineadd.itervalues(), 0) |
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184 if mar == 'm': |
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185 if added and lineremove: |
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186 lineschanged[roundto(added, 5), |
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187 roundto(lineremove, 5)] += 1 |
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188 filechanges += 1 |
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189 elif mar == 'a': |
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190 fileadds += 1 |
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191 if '/' in filename: |
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192 filedir = filename.rsplit('/', 1)[0] |
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193 if filedir not in pctx.dirs(): |
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194 diradds += 1 |
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195 linesinfilesadded[roundto(added, 5)] += 1 |
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196 elif mar == 'r': |
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197 fileremoves += 1 |
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198 for length, count in lineadd.iteritems(): |
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199 linelengths[length] += count |
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200 fileschanged[filechanges] += 1 |
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201 filesadded[fileadds] += 1 |
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202 dirsadded[diradds] += 1 |
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203 filesremoved[fileremoves] += 1 |
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204 |
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205 invchildren = zerodict() |
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206 |
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207 for rev, count in children.iteritems(): |
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208 invchildren[count] += 1 |
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209 |
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210 if output != '-': |
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211 ui.status(_('writing output to %s\n') % output) |
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212 |
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213 def pronk(d): |
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214 return sorted(d.iteritems(), key=lambda x: x[1], reverse=True) |
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215 |
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216 json.dump({'revs': len(revs), |
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217 'initdirs': pronk(dirs), |
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218 'lineschanged': pronk(lineschanged), |
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219 'children': pronk(invchildren), |
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220 'fileschanged': pronk(fileschanged), |
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221 'filesadded': pronk(filesadded), |
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222 'linesinfilesadded': pronk(linesinfilesadded), |
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223 'dirsadded': pronk(dirsadded), |
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224 'filesremoved': pronk(filesremoved), |
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225 'linelengths': pronk(linelengths), |
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226 'parents': pronk(parents), |
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227 'p1distance': pronk(p1distance), |
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228 'p2distance': pronk(p2distance), |
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229 'interarrival': pronk(interarrival), |
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230 'tzoffset': pronk(tzoffset), |
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231 }, |
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232 fp) |
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233 fp.close() |
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234 |
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235 @command('synthesize', |
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236 [('c', 'count', 0, _('create given number of commits'), _('COUNT')), |
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237 ('', 'dict', '', _('path to a dictionary of words'), _('FILE')), |
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238 ('', 'initfiles', 0, _('initial file count to create'), _('COUNT'))], |
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239 _('hg synthesize [OPTION].. DESCFILE')) |
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240 def synthesize(ui, repo, descpath, **opts): |
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241 '''synthesize commits based on a model of an existing repository |
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242 |
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243 The model must have been generated by :hg:`analyze`. Commits will |
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244 be generated randomly according to the probabilities described in |
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245 the model. If --initfiles is set, the repository will be seeded with |
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246 the given number files following the modeled repository's directory |
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247 structure. |
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248 |
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249 When synthesizing new content, commit descriptions, and user |
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250 names, words will be chosen randomly from a dictionary that is |
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251 presumed to contain one word per line. Use --dict to specify the |
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252 path to an alternate dictionary to use. |
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253 ''' |
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254 try: |
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255 fp = hg.openpath(ui, descpath) |
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256 except Exception, err: |
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257 raise util.Abort('%s: %s' % (descpath, err[0].strerror)) |
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258 desc = json.load(fp) |
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259 fp.close() |
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260 |
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261 def cdf(l): |
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262 if not l: |
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263 return [], [] |
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264 vals, probs = zip(*sorted(l, key=lambda x: x[1], reverse=True)) |
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265 t = float(sum(probs, 0)) |
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266 s, cdfs = 0, [] |
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267 for v in probs: |
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268 s += v |
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269 cdfs.append(s / t) |
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270 return vals, cdfs |
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271 |
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272 lineschanged = cdf(desc['lineschanged']) |
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273 fileschanged = cdf(desc['fileschanged']) |
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274 filesadded = cdf(desc['filesadded']) |
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275 dirsadded = cdf(desc['dirsadded']) |
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276 filesremoved = cdf(desc['filesremoved']) |
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277 linelengths = cdf(desc['linelengths']) |
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278 parents = cdf(desc['parents']) |
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279 p1distance = cdf(desc['p1distance']) |
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280 p2distance = cdf(desc['p2distance']) |
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281 interarrival = cdf(desc['interarrival']) |
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282 linesinfilesadded = cdf(desc['linesinfilesadded']) |
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283 tzoffset = cdf(desc['tzoffset']) |
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284 |
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285 dictfile = opts.get('dict') or '/usr/share/dict/words' |
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286 try: |
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287 fp = open(dictfile, 'rU') |
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288 except IOError, err: |
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289 raise util.Abort('%s: %s' % (dictfile, err.strerror)) |
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290 words = fp.read().splitlines() |
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291 fp.close() |
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292 |
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293 initdirs = {} |
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294 if desc['initdirs']: |
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295 for k, v in desc['initdirs']: |
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296 initdirs[k.encode('utf-8').replace('.hg', '_hg')] = v |
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297 initdirs = renamedirs(initdirs, words) |
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298 initdirscdf = cdf(initdirs) |
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299 |
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300 def pick(cdf): |
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301 return cdf[0][bisect.bisect_left(cdf[1], random.random())] |
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302 |
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303 def pickpath(): |
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304 return os.path.join(pick(initdirscdf), random.choice(words)) |
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305 |
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306 def makeline(minimum=0): |
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307 total = max(minimum, pick(linelengths)) |
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308 c, l = 0, [] |
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309 while c < total: |
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310 w = random.choice(words) |
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311 c += len(w) + 1 |
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312 l.append(w) |
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313 return ' '.join(l) |
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314 |
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315 wlock = repo.wlock() |
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316 lock = repo.lock() |
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317 |
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318 nevertouch = set(('.hgsub', '.hgignore', '.hgtags')) |
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319 |
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320 progress = ui.progress |
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321 _synthesizing = _('synthesizing') |
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322 _files = _('initial files') |
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323 _changesets = _('changesets') |
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324 |
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325 # Synthesize a single initial revision adding files to the repo according |
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326 # to the modeled directory structure. |
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327 initcount = int(opts['initfiles']) |
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328 if initcount and initdirs: |
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329 pctx = repo[None].parents()[0] |
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330 dirs = set(pctx.dirs()) |
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331 files = {} |
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332 |
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333 def validpath(path): |
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334 # Don't pick filenames which are already directory names. |
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335 if path in dirs: |
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336 return False |
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337 # Don't pick directories which were used as file names. |
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338 while path: |
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339 if path in files: |
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340 return False |
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341 path = os.path.dirname(path) |
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342 return True |
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343 |
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344 for i in xrange(0, initcount): |
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345 ui.progress(_synthesizing, i, unit=_files, total=initcount) |
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346 |
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347 path = pickpath() |
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348 while not validpath(path): |
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349 path = pickpath() |
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350 data = '%s contents\n' % path |
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351 files[path] = context.memfilectx(repo, path, data) |
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352 dir = os.path.dirname(path) |
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353 while dir and dir not in dirs: |
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354 dirs.add(dir) |
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355 dir = os.path.dirname(dir) |
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356 |
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357 def filectxfn(repo, memctx, path): |
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358 return files[path] |
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359 |
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360 ui.progress(_synthesizing, None) |
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361 message = 'synthesized wide repo with %d files' % (len(files),) |
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362 mc = context.memctx(repo, [pctx.node(), nullid], message, |
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363 files.iterkeys(), filectxfn, ui.username(), |
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364 '%d %d' % util.makedate()) |
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365 initnode = mc.commit() |
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366 if ui.debugflag: |
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367 hexfn = hex |
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368 else: |
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369 hexfn = short |
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370 ui.status(_('added commit %s with %d files\n') |
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371 % (hexfn(initnode), len(files))) |
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372 |
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373 # Synthesize incremental revisions to the repository, adding repo depth. |
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374 count = int(opts['count']) |
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375 heads = set(map(repo.changelog.rev, repo.heads())) |
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376 for i in xrange(count): |
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377 progress(_synthesizing, i, unit=_changesets, total=count) |
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378 |
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379 node = repo.changelog.node |
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380 revs = len(repo) |
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381 |
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382 def pickhead(heads, distance): |
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383 if heads: |
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384 lheads = sorted(heads) |
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385 rev = revs - min(pick(distance), revs) |
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386 if rev < lheads[-1]: |
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387 rev = lheads[bisect.bisect_left(lheads, rev)] |
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388 else: |
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389 rev = lheads[-1] |
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390 return rev, node(rev) |
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391 return nullrev, nullid |
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392 |
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393 r1 = revs - min(pick(p1distance), revs) |
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394 p1 = node(r1) |
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395 |
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396 # the number of heads will grow without bound if we use a pure |
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397 # model, so artificially constrain their proliferation |
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398 toomanyheads = len(heads) > random.randint(1, 20) |
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399 if p2distance[0] and (pick(parents) == 2 or toomanyheads): |
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400 r2, p2 = pickhead(heads.difference([r1]), p2distance) |
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401 else: |
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402 r2, p2 = nullrev, nullid |
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403 |
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404 pl = [p1, p2] |
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405 pctx = repo[r1] |
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406 mf = pctx.manifest() |
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407 mfk = mf.keys() |
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408 changes = {} |
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409 if mfk: |
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410 for __ in xrange(pick(fileschanged)): |
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411 for __ in xrange(10): |
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412 fctx = pctx.filectx(random.choice(mfk)) |
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413 path = fctx.path() |
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414 if not (path in nevertouch or fctx.isbinary() or |
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415 'l' in fctx.flags()): |
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416 break |
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417 lines = fctx.data().splitlines() |
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418 add, remove = pick(lineschanged) |
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419 for __ in xrange(remove): |
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420 if not lines: |
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421 break |
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422 del lines[random.randrange(0, len(lines))] |
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423 for __ in xrange(add): |
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424 lines.insert(random.randint(0, len(lines)), makeline()) |
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425 path = fctx.path() |
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426 changes[path] = context.memfilectx(repo, path, |
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427 '\n'.join(lines) + '\n') |
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428 for __ in xrange(pick(filesremoved)): |
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429 path = random.choice(mfk) |
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430 for __ in xrange(10): |
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431 path = random.choice(mfk) |
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432 if path not in changes: |
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433 changes[path] = None |
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434 break |
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435 if filesadded: |
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436 dirs = list(pctx.dirs()) |
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437 dirs.insert(0, '') |
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438 for __ in xrange(pick(filesadded)): |
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439 pathstr = '' |
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440 while pathstr in dirs: |
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441 path = [random.choice(dirs)] |
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442 if pick(dirsadded): |
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443 path.append(random.choice(words)) |
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444 path.append(random.choice(words)) |
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445 pathstr = '/'.join(filter(None, path)) |
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446 data = '\n'.join(makeline() |
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447 for __ in xrange(pick(linesinfilesadded))) + '\n' |
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448 changes[pathstr] = context.memfilectx(repo, pathstr, data) |
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449 def filectxfn(repo, memctx, path): |
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450 return changes[path] |
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451 if not changes: |
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452 continue |
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453 if revs: |
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454 date = repo['tip'].date()[0] + pick(interarrival) |
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455 else: |
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456 date = time.time() - (86400 * count) |
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457 # dates in mercurial must be positive, fit in 32-bit signed integers. |
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458 date = min(0x7fffffff, max(0, date)) |
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459 user = random.choice(words) + '@' + random.choice(words) |
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460 mc = context.memctx(repo, pl, makeline(minimum=2), |
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461 sorted(changes.iterkeys()), |
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462 filectxfn, user, '%d %d' % (date, pick(tzoffset))) |
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463 newnode = mc.commit() |
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464 heads.add(repo.changelog.rev(newnode)) |
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465 heads.discard(r1) |
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466 heads.discard(r2) |
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467 |
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468 lock.release() |
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469 wlock.release() |
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470 |
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471 def renamedirs(dirs, words): |
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472 '''Randomly rename the directory names in the per-dir file count dict.''' |
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473 wordgen = itertools.cycle(words) |
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474 replacements = {'': ''} |
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475 def rename(dirpath): |
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476 '''Recursively rename the directory and all path prefixes. |
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477 |
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478 The mapping from path to renamed path is stored for all path prefixes |
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479 as in dynamic programming, ensuring linear runtime and consistent |
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480 renaming regardless of iteration order through the model. |
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481 ''' |
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482 if dirpath in replacements: |
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483 return replacements[dirpath] |
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484 head, _ = os.path.split(dirpath) |
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485 if head: |
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486 head = rename(head) |
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487 else: |
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488 head = '' |
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489 renamed = os.path.join(head, wordgen.next()) |
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490 replacements[dirpath] = renamed |
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491 return renamed |
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492 result = [] |
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493 for dirpath, count in dirs.iteritems(): |
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494 result.append([rename(dirpath.lstrip(os.sep)), count]) |
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495 return result |