Mercurial > hg
annotate mercurial/copies.py @ 43299:83bb1e89ab9b
copies: compute the exact set of revision to walk
This change make the code clearer by removing the revision queue. It comes
without very noticeable performance impact. However the simpler code will be
easier to update in later changesets.
revision: large amount; added files: large amount; rename small amount; c3b14617fbd7 9ba6ab77fd29
before: ! wall 1.430082 comb 1.430000 user 1.390000 sys 0.040000 (median of 10)
after: ! wall 1.405192 comb 1.410000 user 1.390000 sys 0.020000 (median of 10)
revision: large amount; added files: small amount; rename small amount; c3b14617fbd7 f650a9b140d2
before: ! wall 1.971366 comb 1.970000 user 1.950000 sys 0.020000 (median of 10)
after: ! wall 1.892541 comb 1.890000 user 1.870000 sys 0.020000 (median of 10)
revision: large amount; added files: large amount; rename large amount; 08ea3258278e d9fa043f30c0
before: ! wall 0.252594 comb 0.250000 user 0.240000 sys 0.010000 (median of 38)
after: ! wall 0.240075 comb 0.240000 user 0.240000 sys 0.000000 (median of 40)
revision: small amount; added files: large amount; rename large amount; df6f7a526b60 a83dc6a2d56f
before: ! wall 0.013100 comb 0.010000 user 0.010000 sys 0.000000 (median of 226)
after: ! wall 0.013247 comb 0.010000 user 0.010000 sys 0.000000 (median of 223)
revision: small amount; added files: large amount; rename small amount; 4aa4e1f8e19a 169138063d63
before: ! wall 0.001633 comb 0.000000 user 0.000000 sys 0.000000 (median of 1000)
after: ! wall 0.001670 comb 0.000000 user 0.000000 sys 0.000000 (median of 1000)
revision: small amount; added files: small amount; rename small amount; 4bc173b045a6 964879152e2e
before: ! wall 0.000078 comb 0.000000 user 0.000000 sys 0.000000 (median of 11984)
after: ! wall 0.000119 comb 0.000000 user 0.000000 sys 0.000000 (median of 7982)
revision: medium amount; added files: large amount; rename medium amount; c95f1ced15f2 2c68e87c3efe
before: ! wall 0.207093 comb 0.210000 user 0.210000 sys 0.000000 (median of 47)
after: ! wall 0.201551 comb 0.200000 user 0.200000 sys 0.000000 (median of 48)
revision: medium amount; added files: medium amount; rename small amount; d343da0c55a8 d7746d32bf9d
before: ! wall 0.038462 comb 0.040000 user 0.040000 sys 0.000000 (median of 100)
after: ! wall 0.036578 comb 0.030000 user 0.030000 sys 0.000000 (median of 100)
Differential Revision: https://phab.mercurial-scm.org/D7076
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Sat, 12 Oct 2019 18:35:14 +0200 |
parents | 8a2925265402 |
children | ffd04bc9f57d |
rev | line source |
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1 # copies.py - copy detection for Mercurial |
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2 # |
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3 # Copyright 2008 Matt Mackall <mpm@selenic.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 from __future__ import absolute_import |
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9 |
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10 import collections |
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11 import os |
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12 |
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13 from .i18n import _ |
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14 |
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15 |
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16 from .revlogutils.flagutil import REVIDX_SIDEDATA |
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17 |
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18 from . import ( |
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19 error, |
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20 match as matchmod, |
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21 node, |
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22 pathutil, |
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23 pycompat, |
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24 util, |
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25 ) |
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26 |
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27 from .revlogutils import sidedata as sidedatamod |
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28 |
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29 from .utils import stringutil |
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30 |
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31 |
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32 def _filter(src, dst, t): |
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33 """filters out invalid copies after chaining""" |
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34 |
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35 # When _chain()'ing copies in 'a' (from 'src' via some other commit 'mid') |
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36 # with copies in 'b' (from 'mid' to 'dst'), we can get the different cases |
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37 # in the following table (not including trivial cases). For example, case 2 |
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38 # is where a file existed in 'src' and remained under that name in 'mid' and |
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39 # then was renamed between 'mid' and 'dst'. |
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40 # |
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41 # case src mid dst result |
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42 # 1 x y - - |
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43 # 2 x y y x->y |
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44 # 3 x y x - |
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45 # 4 x y z x->z |
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46 # 5 - x y - |
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47 # 6 x x y x->y |
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48 # |
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49 # _chain() takes care of chaining the copies in 'a' and 'b', but it |
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50 # cannot tell the difference between cases 1 and 2, between 3 and 4, or |
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51 # between 5 and 6, so it includes all cases in its result. |
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52 # Cases 1, 3, and 5 are then removed by _filter(). |
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53 |
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54 for k, v in list(t.items()): |
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55 # remove copies from files that didn't exist |
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56 if v not in src: |
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57 del t[k] |
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58 # remove criss-crossed copies |
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59 elif k in src and v in dst: |
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60 del t[k] |
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61 # remove copies to files that were then removed |
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62 elif k not in dst: |
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63 del t[k] |
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64 |
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65 |
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66 def _chain(a, b): |
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67 """chain two sets of copies 'a' and 'b'""" |
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68 t = a.copy() |
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69 for k, v in pycompat.iteritems(b): |
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70 if v in t: |
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71 t[k] = t[v] |
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72 else: |
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73 t[k] = v |
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74 return t |
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75 |
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76 |
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77 def _tracefile(fctx, am, basemf): |
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78 """return file context that is the ancestor of fctx present in ancestor |
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79 manifest am |
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80 |
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81 Note: we used to try and stop after a given limit, however checking if that |
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82 limit is reached turned out to be very expensive. we are better off |
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83 disabling that feature.""" |
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84 |
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85 for f in fctx.ancestors(): |
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86 path = f.path() |
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87 if am.get(path, None) == f.filenode(): |
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88 return path |
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89 if basemf and basemf.get(path, None) == f.filenode(): |
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90 return path |
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91 |
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92 |
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93 def _dirstatecopies(repo, match=None): |
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94 ds = repo.dirstate |
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95 c = ds.copies().copy() |
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96 for k in list(c): |
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97 if ds[k] not in b'anm' or (match and not match(k)): |
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98 del c[k] |
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99 return c |
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100 |
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101 |
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102 def _computeforwardmissing(a, b, match=None): |
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103 """Computes which files are in b but not a. |
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104 This is its own function so extensions can easily wrap this call to see what |
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105 files _forwardcopies is about to process. |
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106 """ |
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107 ma = a.manifest() |
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108 mb = b.manifest() |
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109 return mb.filesnotin(ma, match=match) |
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110 |
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111 |
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112 def usechangesetcentricalgo(repo): |
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113 """Checks if we should use changeset-centric copy algorithms""" |
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114 if repo.filecopiesmode == b'changeset-sidedata': |
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115 return True |
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116 readfrom = repo.ui.config(b'experimental', b'copies.read-from') |
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117 changesetsource = (b'changeset-only', b'compatibility') |
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118 return readfrom in changesetsource |
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119 |
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120 |
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121 def _committedforwardcopies(a, b, base, match): |
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122 """Like _forwardcopies(), but b.rev() cannot be None (working copy)""" |
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123 # files might have to be traced back to the fctx parent of the last |
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124 # one-side-only changeset, but not further back than that |
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125 repo = a._repo |
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126 |
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127 if usechangesetcentricalgo(repo): |
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128 return _changesetforwardcopies(a, b, match) |
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129 |
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130 debug = repo.ui.debugflag and repo.ui.configbool(b'devel', b'debug.copies') |
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131 dbg = repo.ui.debug |
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132 if debug: |
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133 dbg(b'debug.copies: looking into rename from %s to %s\n' % (a, b)) |
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134 am = a.manifest() |
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135 basemf = None if base is None else base.manifest() |
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136 |
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137 # find where new files came from |
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138 # we currently don't try to find where old files went, too expensive |
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139 # this means we can miss a case like 'hg rm b; hg cp a b' |
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140 cm = {} |
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141 |
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142 # Computing the forward missing is quite expensive on large manifests, since |
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143 # it compares the entire manifests. We can optimize it in the common use |
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144 # case of computing what copies are in a commit versus its parent (like |
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145 # during a rebase or histedit). Note, we exclude merge commits from this |
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146 # optimization, since the ctx.files() for a merge commit is not correct for |
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147 # this comparison. |
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148 forwardmissingmatch = match |
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149 if b.p1() == a and b.p2().node() == node.nullid: |
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150 filesmatcher = matchmod.exact(b.files()) |
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151 forwardmissingmatch = matchmod.intersectmatchers(match, filesmatcher) |
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152 missing = _computeforwardmissing(a, b, match=forwardmissingmatch) |
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153 |
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154 ancestrycontext = a._repo.changelog.ancestors([b.rev()], inclusive=True) |
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155 |
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156 if debug: |
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157 dbg(b'debug.copies: missing files to search: %d\n' % len(missing)) |
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158 |
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159 for f in sorted(missing): |
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160 if debug: |
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161 dbg(b'debug.copies: tracing file: %s\n' % f) |
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162 fctx = b[f] |
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163 fctx._ancestrycontext = ancestrycontext |
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164 |
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165 if debug: |
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166 start = util.timer() |
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167 opath = _tracefile(fctx, am, basemf) |
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168 if opath: |
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169 if debug: |
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170 dbg(b'debug.copies: rename of: %s\n' % opath) |
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171 cm[f] = opath |
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172 if debug: |
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173 dbg( |
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174 b'debug.copies: time: %f seconds\n' |
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175 % (util.timer() - start) |
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176 ) |
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177 return cm |
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178 |
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179 |
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180 def _revinfogetter(repo): |
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181 """return a function that return multiple data given a <rev>"i |
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182 |
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183 * p1: revision number of first parent |
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184 * p2: revision number of first parent |
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185 * p1copies: mapping of copies from p1 |
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186 * p2copies: mapping of copies from p2 |
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187 * removed: a list of removed files |
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188 """ |
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189 cl = repo.changelog |
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190 parents = cl.parentrevs |
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191 |
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192 if repo.filecopiesmode == b'changeset-sidedata': |
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193 changelogrevision = cl.changelogrevision |
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194 flags = cl.flags |
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195 |
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196 def revinfo(rev): |
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197 p1, p2 = parents(rev) |
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198 if flags(rev) & REVIDX_SIDEDATA: |
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199 c = changelogrevision(rev) |
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200 p1copies = c.p1copies |
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201 p2copies = c.p2copies |
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202 removed = c.filesremoved |
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203 else: |
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204 p1copies = {} |
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205 p2copies = {} |
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206 removed = () |
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207 return p1, p2, p1copies, p2copies, removed |
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208 |
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209 else: |
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210 |
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211 def revinfo(rev): |
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212 p1, p2 = parents(rev) |
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213 ctx = repo[rev] |
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214 p1copies, p2copies = ctx._copies |
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215 removed = ctx.filesremoved() |
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216 return p1, p2, p1copies, p2copies, removed |
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217 |
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218 return revinfo |
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219 |
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220 |
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221 def _changesetforwardcopies(a, b, match): |
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222 if a.rev() in (node.nullrev, b.rev()): |
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223 return {} |
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224 |
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225 repo = a.repo().unfiltered() |
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226 children = {} |
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227 revinfo = _revinfogetter(repo) |
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228 |
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229 cl = repo.changelog |
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230 missingrevs = cl.findmissingrevs(common=[a.rev()], heads=[b.rev()]) |
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231 mrset = set(missingrevs) |
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232 roots = set() |
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233 for r in missingrevs: |
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234 for p in cl.parentrevs(r): |
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235 if p == node.nullrev: |
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236 continue |
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237 if p not in children: |
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238 children[p] = [r] |
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239 else: |
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240 children[p].append(r) |
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241 if p not in mrset: |
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242 roots.add(p) |
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243 if not roots: |
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244 # no common revision to track copies from |
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245 return {} |
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246 min_root = min(roots) |
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247 |
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248 from_head = set( |
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249 cl.reachableroots(min_root, [b.rev()], list(roots), includepath=True) |
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250 ) |
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251 |
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252 iterrevs = set(from_head) |
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253 iterrevs &= mrset |
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254 iterrevs.update(roots) |
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255 iterrevs.remove(b.rev()) |
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256 all_copies = {r: {} for r in roots} |
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257 alwaysmatch = match.always() |
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258 for r in sorted(iterrevs): |
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259 copies = all_copies.pop(r) |
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260 for i, c in enumerate(children[r]): |
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261 p1, p2, p1copies, p2copies, removed = revinfo(c) |
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262 if r == p1: |
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263 parent = 1 |
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264 childcopies = p1copies |
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265 else: |
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266 assert r == p2 |
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267 parent = 2 |
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268 childcopies = p2copies |
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269 if not alwaysmatch: |
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270 childcopies = { |
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271 dst: src for dst, src in childcopies.items() if match(dst) |
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272 } |
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273 # Copy the dict only if later iterations will also need it |
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274 if i != len(children[r]) - 1: |
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275 newcopies = copies.copy() |
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276 else: |
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277 newcopies = copies |
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278 if childcopies: |
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279 newcopies = _chain(newcopies, childcopies) |
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280 for f in removed: |
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281 if f in newcopies: |
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282 del newcopies[f] |
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283 othercopies = all_copies.get(c) |
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284 if othercopies is None: |
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285 all_copies[c] = newcopies |
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286 else: |
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287 # we are the second parent to work on c, we need to merge our |
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288 # work with the other. |
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289 # |
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290 # Unlike when copies are stored in the filelog, we consider |
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291 # it a copy even if the destination already existed on the |
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292 # other branch. It's simply too expensive to check if the |
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293 # file existed in the manifest. |
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294 # |
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295 # In case of conflict, parent 1 take precedence over parent 2. |
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296 # This is an arbitrary choice made anew when implementing |
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297 # changeset based copies. It was made without regards with |
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298 # potential filelog related behavior. |
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299 if parent == 1: |
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300 othercopies.update(newcopies) |
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301 else: |
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302 newcopies.update(othercopies) |
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303 all_copies[c] = newcopies |
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304 return all_copies[b.rev()] |
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305 |
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306 |
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307 def _forwardcopies(a, b, base=None, match=None): |
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308 """find {dst@b: src@a} copy mapping where a is an ancestor of b""" |
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309 |
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310 if base is None: |
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311 base = a |
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312 match = a.repo().narrowmatch(match) |
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313 # check for working copy |
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314 if b.rev() is None: |
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315 cm = _committedforwardcopies(a, b.p1(), base, match) |
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316 # combine copies from dirstate if necessary |
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317 copies = _chain(cm, _dirstatecopies(b._repo, match)) |
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318 else: |
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319 copies = _committedforwardcopies(a, b, base, match) |
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320 return copies |
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321 |
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322 |
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323 def _backwardrenames(a, b, match): |
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324 if a._repo.ui.config(b'experimental', b'copytrace') == b'off': |
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325 return {} |
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326 |
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327 # Even though we're not taking copies into account, 1:n rename situations |
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328 # can still exist (e.g. hg cp a b; hg mv a c). In those cases we |
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329 # arbitrarily pick one of the renames. |
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330 # We don't want to pass in "match" here, since that would filter |
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331 # the destination by it. Since we're reversing the copies, we want |
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332 # to filter the source instead. |
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333 f = _forwardcopies(b, a) |
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334 r = {} |
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335 for k, v in sorted(pycompat.iteritems(f)): |
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336 if match and not match(v): |
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337 continue |
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338 # remove copies |
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339 if v in a: |
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340 continue |
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341 r[v] = k |
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342 return r |
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343 |
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344 |
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345 def pathcopies(x, y, match=None): |
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346 """find {dst@y: src@x} copy mapping for directed compare""" |
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347 repo = x._repo |
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348 debug = repo.ui.debugflag and repo.ui.configbool(b'devel', b'debug.copies') |
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349 if debug: |
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350 repo.ui.debug( |
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351 b'debug.copies: searching copies from %s to %s\n' % (x, y) |
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352 ) |
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353 if x == y or not x or not y: |
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354 return {} |
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355 a = y.ancestor(x) |
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356 if a == x: |
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357 if debug: |
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358 repo.ui.debug(b'debug.copies: search mode: forward\n') |
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359 if y.rev() is None and x == y.p1(): |
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360 # short-circuit to avoid issues with merge states |
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361 return _dirstatecopies(repo, match) |
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362 copies = _forwardcopies(x, y, match=match) |
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363 elif a == y: |
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364 if debug: |
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365 repo.ui.debug(b'debug.copies: search mode: backward\n') |
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366 copies = _backwardrenames(x, y, match=match) |
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367 else: |
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368 if debug: |
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369 repo.ui.debug(b'debug.copies: search mode: combined\n') |
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370 base = None |
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371 if a.rev() != node.nullrev: |
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372 base = x |
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373 copies = _chain( |
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374 _backwardrenames(x, a, match=match), |
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375 _forwardcopies(a, y, base, match=match), |
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376 ) |
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377 _filter(x, y, copies) |
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378 return copies |
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379 |
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380 |
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381 def mergecopies(repo, c1, c2, base): |
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382 """ |
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383 Finds moves and copies between context c1 and c2 that are relevant for |
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384 merging. 'base' will be used as the merge base. |
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385 |
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386 Copytracing is used in commands like rebase, merge, unshelve, etc to merge |
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387 files that were moved/ copied in one merge parent and modified in another. |
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388 For example: |
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389 |
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390 o ---> 4 another commit |
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391 | |
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392 | o ---> 3 commit that modifies a.txt |
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393 | / |
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394 o / ---> 2 commit that moves a.txt to b.txt |
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395 |/ |
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396 o ---> 1 merge base |
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397 |
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398 If we try to rebase revision 3 on revision 4, since there is no a.txt in |
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399 revision 4, and if user have copytrace disabled, we prints the following |
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400 message: |
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401 |
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402 ```other changed <file> which local deleted``` |
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403 |
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404 Returns five dicts: "copy", "movewithdir", "diverge", "renamedelete" and |
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405 "dirmove". |
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406 |
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407 "copy" is a mapping from destination name -> source name, |
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408 where source is in c1 and destination is in c2 or vice-versa. |
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409 |
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410 "movewithdir" is a mapping from source name -> destination name, |
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411 where the file at source present in one context but not the other |
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412 needs to be moved to destination by the merge process, because the |
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413 other context moved the directory it is in. |
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414 |
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415 "diverge" is a mapping of source name -> list of destination names |
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416 for divergent renames. |
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417 |
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418 "renamedelete" is a mapping of source name -> list of destination |
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419 names for files deleted in c1 that were renamed in c2 or vice-versa. |
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420 |
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421 "dirmove" is a mapping of detected source dir -> destination dir renames. |
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422 This is needed for handling changes to new files previously grafted into |
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423 renamed directories. |
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424 |
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425 This function calls different copytracing algorithms based on config. |
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426 """ |
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427 # avoid silly behavior for update from empty dir |
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428 if not c1 or not c2 or c1 == c2: |
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429 return {}, {}, {}, {}, {} |
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430 |
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431 narrowmatch = c1.repo().narrowmatch() |
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432 |
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433 # avoid silly behavior for parent -> working dir |
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434 if c2.node() is None and c1.node() == repo.dirstate.p1(): |
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435 return _dirstatecopies(repo, narrowmatch), {}, {}, {}, {} |
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436 |
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437 copytracing = repo.ui.config(b'experimental', b'copytrace') |
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438 if stringutil.parsebool(copytracing) is False: |
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439 # stringutil.parsebool() returns None when it is unable to parse the |
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440 # value, so we should rely on making sure copytracing is on such cases |
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441 return {}, {}, {}, {}, {} |
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442 |
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443 if usechangesetcentricalgo(repo): |
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444 # The heuristics don't make sense when we need changeset-centric algos |
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445 return _fullcopytracing(repo, c1, c2, base) |
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446 |
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447 # Copy trace disabling is explicitly below the node == p1 logic above |
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448 # because the logic above is required for a simple copy to be kept across a |
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449 # rebase. |
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450 if copytracing == b'heuristics': |
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451 # Do full copytracing if only non-public revisions are involved as |
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452 # that will be fast enough and will also cover the copies which could |
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453 # be missed by heuristics |
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454 if _isfullcopytraceable(repo, c1, base): |
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455 return _fullcopytracing(repo, c1, c2, base) |
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456 return _heuristicscopytracing(repo, c1, c2, base) |
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457 else: |
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458 return _fullcopytracing(repo, c1, c2, base) |
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459 |
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460 |
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461 def _isfullcopytraceable(repo, c1, base): |
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462 """ Checks that if base, source and destination are all no-public branches, |
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463 if yes let's use the full copytrace algorithm for increased capabilities |
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464 since it will be fast enough. |
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465 |
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466 `experimental.copytrace.sourcecommitlimit` can be used to set a limit for |
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467 number of changesets from c1 to base such that if number of changesets are |
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468 more than the limit, full copytracing algorithm won't be used. |
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469 """ |
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470 if c1.rev() is None: |
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471 c1 = c1.p1() |
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472 if c1.mutable() and base.mutable(): |
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473 sourcecommitlimit = repo.ui.configint( |
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474 b'experimental', b'copytrace.sourcecommitlimit' |
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475 ) |
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476 commits = len(repo.revs(b'%d::%d', base.rev(), c1.rev())) |
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477 return commits < sourcecommitlimit |
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478 return False |
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479 |
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480 |
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481 def _checksinglesidecopies( |
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482 src, dsts1, m1, m2, mb, c2, base, copy, renamedelete |
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483 ): |
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484 if src not in m2: |
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485 # deleted on side 2 |
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486 if src not in m1: |
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487 # renamed on side 1, deleted on side 2 |
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488 renamedelete[src] = dsts1 |
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489 elif m2[src] != mb[src]: |
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490 if not _related(c2[src], base[src]): |
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491 return |
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492 # modified on side 2 |
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493 for dst in dsts1: |
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494 if dst not in m2: |
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495 # dst not added on side 2 (handle as regular |
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496 # "both created" case in manifestmerge otherwise) |
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497 copy[dst] = src |
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498 |
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499 |
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500 def _fullcopytracing(repo, c1, c2, base): |
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501 """ The full copytracing algorithm which finds all the new files that were |
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502 added from merge base up to the top commit and for each file it checks if |
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503 this file was copied from another file. |
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504 |
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505 This is pretty slow when a lot of changesets are involved but will track all |
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506 the copies. |
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507 """ |
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508 m1 = c1.manifest() |
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509 m2 = c2.manifest() |
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510 mb = base.manifest() |
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511 |
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512 copies1 = pathcopies(base, c1) |
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513 copies2 = pathcopies(base, c2) |
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514 |
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515 inversecopies1 = {} |
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516 inversecopies2 = {} |
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517 for dst, src in copies1.items(): |
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518 inversecopies1.setdefault(src, []).append(dst) |
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519 for dst, src in copies2.items(): |
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520 inversecopies2.setdefault(src, []).append(dst) |
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521 |
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522 copy = {} |
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523 diverge = {} |
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524 renamedelete = {} |
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525 allsources = set(inversecopies1) | set(inversecopies2) |
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526 for src in allsources: |
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527 dsts1 = inversecopies1.get(src) |
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528 dsts2 = inversecopies2.get(src) |
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529 if dsts1 and dsts2: |
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530 # copied/renamed on both sides |
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531 if src not in m1 and src not in m2: |
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532 # renamed on both sides |
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533 dsts1 = set(dsts1) |
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534 dsts2 = set(dsts2) |
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535 # If there's some overlap in the rename destinations, we |
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536 # consider it not divergent. For example, if side 1 copies 'a' |
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537 # to 'b' and 'c' and deletes 'a', and side 2 copies 'a' to 'c' |
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538 # and 'd' and deletes 'a'. |
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539 if dsts1 & dsts2: |
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540 for dst in dsts1 & dsts2: |
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541 copy[dst] = src |
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542 else: |
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543 diverge[src] = sorted(dsts1 | dsts2) |
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544 elif src in m1 and src in m2: |
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545 # copied on both sides |
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546 dsts1 = set(dsts1) |
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547 dsts2 = set(dsts2) |
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548 for dst in dsts1 & dsts2: |
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549 copy[dst] = src |
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550 # TODO: Handle cases where it was renamed on one side and copied |
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551 # on the other side |
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552 elif dsts1: |
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553 # copied/renamed only on side 1 |
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554 _checksinglesidecopies( |
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555 src, dsts1, m1, m2, mb, c2, base, copy, renamedelete |
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556 ) |
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557 elif dsts2: |
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558 # copied/renamed only on side 2 |
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559 _checksinglesidecopies( |
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560 src, dsts2, m2, m1, mb, c1, base, copy, renamedelete |
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561 ) |
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562 |
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563 renamedeleteset = set() |
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564 divergeset = set() |
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565 for dsts in diverge.values(): |
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566 divergeset.update(dsts) |
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567 for dsts in renamedelete.values(): |
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568 renamedeleteset.update(dsts) |
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569 |
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570 # find interesting file sets from manifests |
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571 addedinm1 = m1.filesnotin(mb, repo.narrowmatch()) |
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572 addedinm2 = m2.filesnotin(mb, repo.narrowmatch()) |
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573 u1 = sorted(addedinm1 - addedinm2) |
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574 u2 = sorted(addedinm2 - addedinm1) |
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575 |
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576 header = b" unmatched files in %s" |
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577 if u1: |
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578 repo.ui.debug(b"%s:\n %s\n" % (header % b'local', b"\n ".join(u1))) |
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579 if u2: |
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580 repo.ui.debug(b"%s:\n %s\n" % (header % b'other', b"\n ".join(u2))) |
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581 |
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582 fullcopy = copies1.copy() |
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583 fullcopy.update(copies2) |
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584 if not fullcopy: |
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585 return copy, {}, diverge, renamedelete, {} |
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586 |
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587 if repo.ui.debugflag: |
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588 repo.ui.debug( |
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589 b" all copies found (* = to merge, ! = divergent, " |
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590 b"% = renamed and deleted):\n" |
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591 ) |
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592 for f in sorted(fullcopy): |
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593 note = b"" |
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594 if f in copy: |
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595 note += b"*" |
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596 if f in divergeset: |
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597 note += b"!" |
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598 if f in renamedeleteset: |
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599 note += b"%" |
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600 repo.ui.debug( |
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601 b" src: '%s' -> dst: '%s' %s\n" % (fullcopy[f], f, note) |
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602 ) |
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603 del divergeset |
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604 |
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605 repo.ui.debug(b" checking for directory renames\n") |
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606 |
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607 # generate a directory move map |
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608 d1, d2 = c1.dirs(), c2.dirs() |
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609 invalid = set() |
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610 dirmove = {} |
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611 |
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612 # examine each file copy for a potential directory move, which is |
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613 # when all the files in a directory are moved to a new directory |
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614 for dst, src in pycompat.iteritems(fullcopy): |
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615 dsrc, ddst = pathutil.dirname(src), pathutil.dirname(dst) |
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616 if dsrc in invalid: |
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617 # already seen to be uninteresting |
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618 continue |
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619 elif dsrc in d1 and ddst in d1: |
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620 # directory wasn't entirely moved locally |
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621 invalid.add(dsrc) |
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622 elif dsrc in d2 and ddst in d2: |
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623 # directory wasn't entirely moved remotely |
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624 invalid.add(dsrc) |
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625 elif dsrc in dirmove and dirmove[dsrc] != ddst: |
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626 # files from the same directory moved to two different places |
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627 invalid.add(dsrc) |
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628 else: |
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629 # looks good so far |
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630 dirmove[dsrc] = ddst |
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631 |
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632 for i in invalid: |
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633 if i in dirmove: |
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634 del dirmove[i] |
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635 del d1, d2, invalid |
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636 |
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|
637 if not dirmove: |
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638 return copy, {}, diverge, renamedelete, {} |
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639 |
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640 dirmove = {k + b"/": v + b"/" for k, v in pycompat.iteritems(dirmove)} |
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641 |
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642 for d in dirmove: |
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643 repo.ui.debug( |
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644 b" discovered dir src: '%s' -> dst: '%s'\n" % (d, dirmove[d]) |
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645 ) |
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646 |
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647 movewithdir = {} |
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648 # check unaccounted nonoverlapping files against directory moves |
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649 for f in u1 + u2: |
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650 if f not in fullcopy: |
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651 for d in dirmove: |
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652 if f.startswith(d): |
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653 # new file added in a directory that was moved, move it |
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654 df = dirmove[d] + f[len(d) :] |
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655 if df not in copy: |
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656 movewithdir[f] = df |
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657 repo.ui.debug( |
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658 b" pending file src: '%s' -> dst: '%s'\n" |
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659 % (f, df) |
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660 ) |
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661 break |
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662 |
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663 return copy, movewithdir, diverge, renamedelete, dirmove |
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664 |
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665 |
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666 def _heuristicscopytracing(repo, c1, c2, base): |
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667 """ Fast copytracing using filename heuristics |
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668 |
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669 Assumes that moves or renames are of following two types: |
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670 |
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671 1) Inside a directory only (same directory name but different filenames) |
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672 2) Move from one directory to another |
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673 (same filenames but different directory names) |
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674 |
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675 Works only when there are no merge commits in the "source branch". |
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676 Source branch is commits from base up to c2 not including base. |
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677 |
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678 If merge is involved it fallbacks to _fullcopytracing(). |
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679 |
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680 Can be used by setting the following config: |
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681 |
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682 [experimental] |
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683 copytrace = heuristics |
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684 |
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685 In some cases the copy/move candidates found by heuristics can be very large |
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686 in number and that will make the algorithm slow. The number of possible |
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687 candidates to check can be limited by using the config |
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688 `experimental.copytrace.movecandidateslimit` which defaults to 100. |
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689 """ |
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690 |
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691 if c1.rev() is None: |
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692 c1 = c1.p1() |
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693 if c2.rev() is None: |
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694 c2 = c2.p1() |
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695 |
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696 copies = {} |
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697 |
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698 changedfiles = set() |
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699 m1 = c1.manifest() |
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700 if not repo.revs(b'%d::%d', base.rev(), c2.rev()): |
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701 # If base is not in c2 branch, we switch to fullcopytracing |
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702 repo.ui.debug( |
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703 b"switching to full copytracing as base is not " |
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704 b"an ancestor of c2\n" |
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705 ) |
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706 return _fullcopytracing(repo, c1, c2, base) |
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707 |
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708 ctx = c2 |
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709 while ctx != base: |
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710 if len(ctx.parents()) == 2: |
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711 # To keep things simple let's not handle merges |
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712 repo.ui.debug(b"switching to full copytracing because of merges\n") |
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713 return _fullcopytracing(repo, c1, c2, base) |
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714 changedfiles.update(ctx.files()) |
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715 ctx = ctx.p1() |
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716 |
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717 cp = _forwardcopies(base, c2) |
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718 for dst, src in pycompat.iteritems(cp): |
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719 if src in m1: |
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720 copies[dst] = src |
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721 |
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722 # file is missing if it isn't present in the destination, but is present in |
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723 # the base and present in the source. |
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724 # Presence in the base is important to exclude added files, presence in the |
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725 # source is important to exclude removed files. |
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726 filt = lambda f: f not in m1 and f in base and f in c2 |
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727 missingfiles = [f for f in changedfiles if filt(f)] |
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728 |
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729 if missingfiles: |
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730 basenametofilename = collections.defaultdict(list) |
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731 dirnametofilename = collections.defaultdict(list) |
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732 |
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733 for f in m1.filesnotin(base.manifest()): |
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734 basename = os.path.basename(f) |
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735 dirname = os.path.dirname(f) |
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736 basenametofilename[basename].append(f) |
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737 dirnametofilename[dirname].append(f) |
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738 |
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739 for f in missingfiles: |
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740 basename = os.path.basename(f) |
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741 dirname = os.path.dirname(f) |
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742 samebasename = basenametofilename[basename] |
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743 samedirname = dirnametofilename[dirname] |
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744 movecandidates = samebasename + samedirname |
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745 # f is guaranteed to be present in c2, that's why |
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746 # c2.filectx(f) won't fail |
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747 f2 = c2.filectx(f) |
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748 # we can have a lot of candidates which can slow down the heuristics |
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749 # config value to limit the number of candidates moves to check |
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750 maxcandidates = repo.ui.configint( |
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751 b'experimental', b'copytrace.movecandidateslimit' |
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752 ) |
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753 |
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754 if len(movecandidates) > maxcandidates: |
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755 repo.ui.status( |
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756 _( |
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757 b"skipping copytracing for '%s', more " |
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758 b"candidates than the limit: %d\n" |
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759 ) |
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760 % (f, len(movecandidates)) |
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761 ) |
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762 continue |
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763 |
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764 for candidate in movecandidates: |
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765 f1 = c1.filectx(candidate) |
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766 if _related(f1, f2): |
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767 # if there are a few related copies then we'll merge |
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768 # changes into all of them. This matches the behaviour |
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769 # of upstream copytracing |
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770 copies[candidate] = f |
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771 |
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772 return copies, {}, {}, {}, {} |
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773 |
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774 |
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775 def _related(f1, f2): |
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776 """return True if f1 and f2 filectx have a common ancestor |
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777 |
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778 Walk back to common ancestor to see if the two files originate |
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779 from the same file. Since workingfilectx's rev() is None it messes |
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780 up the integer comparison logic, hence the pre-step check for |
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781 None (f1 and f2 can only be workingfilectx's initially). |
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782 """ |
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783 |
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784 if f1 == f2: |
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785 return True # a match |
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786 |
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787 g1, g2 = f1.ancestors(), f2.ancestors() |
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788 try: |
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789 f1r, f2r = f1.linkrev(), f2.linkrev() |
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790 |
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791 if f1r is None: |
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792 f1 = next(g1) |
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793 if f2r is None: |
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794 f2 = next(g2) |
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795 |
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796 while True: |
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797 f1r, f2r = f1.linkrev(), f2.linkrev() |
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798 if f1r > f2r: |
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799 f1 = next(g1) |
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800 elif f2r > f1r: |
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801 f2 = next(g2) |
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802 else: # f1 and f2 point to files in the same linkrev |
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803 return f1 == f2 # true if they point to the same file |
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804 except StopIteration: |
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805 return False |
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806 |
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807 |
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808 def duplicatecopies(repo, wctx, rev, fromrev, skiprev=None): |
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809 """reproduce copies from fromrev to rev in the dirstate |
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810 |
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811 If skiprev is specified, it's a revision that should be used to |
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812 filter copy records. Any copies that occur between fromrev and |
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813 skiprev will not be duplicated, even if they appear in the set of |
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814 copies between fromrev and rev. |
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815 """ |
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816 exclude = {} |
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817 ctraceconfig = repo.ui.config(b'experimental', b'copytrace') |
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818 bctrace = stringutil.parsebool(ctraceconfig) |
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819 if skiprev is not None and ( |
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820 ctraceconfig == b'heuristics' or bctrace or bctrace is None |
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821 ): |
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822 # copytrace='off' skips this line, but not the entire function because |
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823 # the line below is O(size of the repo) during a rebase, while the rest |
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824 # of the function is much faster (and is required for carrying copy |
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825 # metadata across the rebase anyway). |
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826 exclude = pathcopies(repo[fromrev], repo[skiprev]) |
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827 for dst, src in pycompat.iteritems(pathcopies(repo[fromrev], repo[rev])): |
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828 if dst in exclude: |
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829 continue |
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830 if dst in wctx: |
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831 wctx[dst].markcopied(src) |
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832 |
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833 |
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834 def computechangesetfilesadded(ctx): |
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835 """return the list of files added in a changeset |
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836 """ |
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837 added = [] |
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838 for f in ctx.files(): |
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839 if not any(f in p for p in ctx.parents()): |
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840 added.append(f) |
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841 return added |
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842 |
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843 |
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844 def computechangesetfilesremoved(ctx): |
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845 """return the list of files removed in a changeset |
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846 """ |
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847 removed = [] |
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848 for f in ctx.files(): |
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849 if f not in ctx: |
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850 removed.append(f) |
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851 return removed |
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852 |
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853 |
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854 def computechangesetcopies(ctx): |
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855 """return the copies data for a changeset |
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856 |
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857 The copies data are returned as a pair of dictionnary (p1copies, p2copies). |
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858 |
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859 Each dictionnary are in the form: `{newname: oldname}` |
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860 """ |
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861 p1copies = {} |
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862 p2copies = {} |
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863 p1 = ctx.p1() |
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864 p2 = ctx.p2() |
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865 narrowmatch = ctx._repo.narrowmatch() |
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|
866 for dst in ctx.files(): |
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867 if not narrowmatch(dst) or dst not in ctx: |
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868 continue |
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869 copied = ctx[dst].renamed() |
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870 if not copied: |
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871 continue |
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872 src, srcnode = copied |
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873 if src in p1 and p1[src].filenode() == srcnode: |
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874 p1copies[dst] = src |
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875 elif src in p2 and p2[src].filenode() == srcnode: |
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876 p2copies[dst] = src |
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877 return p1copies, p2copies |
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878 |
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879 |
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880 def encodecopies(files, copies): |
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881 items = [] |
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882 for i, dst in enumerate(files): |
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883 if dst in copies: |
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884 items.append(b'%d\0%s' % (i, copies[dst])) |
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885 if len(items) != len(copies): |
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886 raise error.ProgrammingError( |
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887 b'some copy targets missing from file list' |
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888 ) |
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889 return b"\n".join(items) |
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890 |
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891 |
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892 def decodecopies(files, data): |
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893 try: |
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894 copies = {} |
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895 if not data: |
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896 return copies |
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897 for l in data.split(b'\n'): |
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898 strindex, src = l.split(b'\0') |
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899 i = int(strindex) |
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900 dst = files[i] |
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901 copies[dst] = src |
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902 return copies |
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903 except (ValueError, IndexError): |
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904 # Perhaps someone had chosen the same key name (e.g. "p1copies") and |
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905 # used different syntax for the value. |
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906 return None |
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|
907 |
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|
908 |
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909 def encodefileindices(files, subset): |
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910 subset = set(subset) |
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911 indices = [] |
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912 for i, f in enumerate(files): |
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913 if f in subset: |
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914 indices.append(b'%d' % i) |
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915 return b'\n'.join(indices) |
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|
916 |
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|
917 |
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918 def decodefileindices(files, data): |
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919 try: |
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920 subset = [] |
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921 if not data: |
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|
922 return subset |
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|
923 for strindex in data.split(b'\n'): |
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924 i = int(strindex) |
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925 if i < 0 or i >= len(files): |
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|
926 return None |
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|
927 subset.append(files[i]) |
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928 return subset |
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929 except (ValueError, IndexError): |
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|
930 # Perhaps someone had chosen the same key name (e.g. "added") and |
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|
931 # used different syntax for the value. |
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|
932 return None |
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|
933 |
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|
934 |
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|
935 def _getsidedata(srcrepo, rev): |
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936 ctx = srcrepo[rev] |
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937 filescopies = computechangesetcopies(ctx) |
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|
938 filesadded = computechangesetfilesadded(ctx) |
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939 filesremoved = computechangesetfilesremoved(ctx) |
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940 sidedata = {} |
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941 if any([filescopies, filesadded, filesremoved]): |
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942 sortedfiles = sorted(ctx.files()) |
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943 p1copies, p2copies = filescopies |
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944 p1copies = encodecopies(sortedfiles, p1copies) |
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945 p2copies = encodecopies(sortedfiles, p2copies) |
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|
946 filesadded = encodefileindices(sortedfiles, filesadded) |
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947 filesremoved = encodefileindices(sortedfiles, filesremoved) |
43231
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948 if p1copies: |
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949 sidedata[sidedatamod.SD_P1COPIES] = p1copies |
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950 if p2copies: |
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951 sidedata[sidedatamod.SD_P2COPIES] = p2copies |
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|
952 if filesadded: |
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|
953 sidedata[sidedatamod.SD_FILESADDED] = filesadded |
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|
954 if filesremoved: |
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|
955 sidedata[sidedatamod.SD_FILESREMOVED] = filesremoved |
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956 return sidedata |
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957 |
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958 |
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959 def getsidedataadder(srcrepo, destrepo): |
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960 def sidedatacompanion(revlog, rev): |
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961 sidedata = {} |
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|
962 if util.safehasattr(revlog, 'filteredrevs'): # this is a changelog |
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|
963 sidedata = _getsidedata(srcrepo, rev) |
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|
964 return False, (), sidedata |
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|
965 |
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|
966 return sidedatacompanion |
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967 |
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Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
43147
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968 |
843da18386d5
sidedatacopies: deal with upgrading and downgrading to that format
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
43147
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969 def getsidedataremover(srcrepo, destrepo): |
843da18386d5
sidedatacopies: deal with upgrading and downgrading to that format
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
43147
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970 def sidedatacompanion(revlog, rev): |
843da18386d5
sidedatacopies: deal with upgrading and downgrading to that format
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
43147
diff
changeset
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971 f = () |
843da18386d5
sidedatacopies: deal with upgrading and downgrading to that format
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
43147
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972 if util.safehasattr(revlog, 'filteredrevs'): # this is a changelog |
843da18386d5
sidedatacopies: deal with upgrading and downgrading to that format
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
43147
diff
changeset
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973 if revlog.flags(rev) & REVIDX_SIDEDATA: |
843da18386d5
sidedatacopies: deal with upgrading and downgrading to that format
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
43147
diff
changeset
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974 f = ( |
843da18386d5
sidedatacopies: deal with upgrading and downgrading to that format
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
43147
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changeset
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975 sidedatamod.SD_P1COPIES, |
843da18386d5
sidedatacopies: deal with upgrading and downgrading to that format
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
43147
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976 sidedatamod.SD_P2COPIES, |
843da18386d5
sidedatacopies: deal with upgrading and downgrading to that format
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
43147
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977 sidedatamod.SD_FILESADDED, |
843da18386d5
sidedatacopies: deal with upgrading and downgrading to that format
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
43147
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changeset
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978 sidedatamod.SD_FILESREMOVED, |
843da18386d5
sidedatacopies: deal with upgrading and downgrading to that format
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
43147
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changeset
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979 ) |
843da18386d5
sidedatacopies: deal with upgrading and downgrading to that format
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
43147
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980 return False, f, {} |
843da18386d5
sidedatacopies: deal with upgrading and downgrading to that format
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
43147
diff
changeset
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981 |
843da18386d5
sidedatacopies: deal with upgrading and downgrading to that format
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
43147
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982 return sidedatacompanion |