Mercurial > hg
annotate mercurial/copies.py @ 43297:8a2925265402
sidedatacopies: fast path data fetching if revision has no sidedata
When using the side data mode, we know their won't be any copy information
sidedata. Skipping revision restoration give an important speed boost.
In the future, there will be other user of sidedata, reducing the efficiency of
this. We should consider adding a dedicated flag in revlog V2 to preserve this
optimisation. The current situation is good enough for now.
revision: large amount; added files: large amount; rename small amount; c3b14617fbd7 9ba6ab77fd29
before: ! wall 2.401569 comb 2.400000 user 2.390000 sys 0.010000 (median of 10)
after: ! wall 1.429294 comb 1.430000 user 1.410000 sys 0.020000 (median of 10)
revision: large amount; added files: small amount; rename small amount; c3b14617fbd7 f650a9b140d2
before: ! wall 3.519140 comb 3.520000 user 3.470000 sys 0.050000 (median of 10)
after: ! wall 1.963332 comb 1.960000 user 1.960000 sys 0.000000 (median of 10)
revision: large amount; added files: large amount; rename large amount; 08ea3258278e d9fa043f30c0
before: ! wall 0.593880 comb 0.600000 user 0.590000 sys 0.010000 (median of 15)
after: ! wall 0.251679 comb 0.250000 user 0.250000 sys 0.000000 (median of 38)
revision: small amount; added files: large amount; rename large amount; df6f7a526b60 a83dc6a2d56f
before: ! wall 0.013414 comb 0.020000 user 0.020000 sys 0.000000 (median of 220)
after: ! wall 0.013222 comb 0.020000 user 0.020000 sys 0.000000 (median of 223)
revision: small amount; added files: large amount; rename small amount; 4aa4e1f8e19a 169138063d63
before: ! wall 0.002711 comb 0.000000 user 0.000000 sys 0.000000 (median of 1000)
after: ! wall 0.001631 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 0.000077 comb 0.000000 user 0.000000 sys 0.000000 (median of 12208)
after: ! wall 0.000078 comb 0.000000 user 0.000000 sys 0.000000 (median of 12012)
revision: medium amount; added files: large amount; rename medium amount; c95f1ced15f2 2c68e87c3efe
before: ! wall 0.410067 comb 0.410000 user 0.410000 sys 0.000000 (median of 23)
after: ! wall 0.207786 comb 0.200000 user 0.200000 sys 0.000000 (median of 46)
revision: medium amount; added files: medium amount; rename small amount; d343da0c55a8 d7746d32bf9d
before: ! wall 0.097004 comb 0.090000 user 0.090000 sys 0.000000 (median of 100)
after: ! wall 0.038495 comb 0.030000 user 0.030000 sys 0.000000 (median of 100)
Differential Revision: https://phab.mercurial-scm.org/D7074
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Wed, 02 Oct 2019 18:16:02 -0400 |
parents | 675c776fbcd1 |
children | 83bb1e89ab9b |
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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 heapq |
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12 import os |
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13 |
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14 from .i18n import _ |
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15 |
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16 |
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17 from .revlogutils.flagutil import REVIDX_SIDEDATA |
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18 |
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19 from . import ( |
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20 error, |
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21 match as matchmod, |
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22 node, |
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23 pathutil, |
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24 pycompat, |
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25 util, |
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26 ) |
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27 |
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28 from .revlogutils import sidedata as sidedatamod |
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29 |
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30 from .utils import stringutil |
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31 |
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32 |
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33 def _filter(src, dst, t): |
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34 """filters out invalid copies after chaining""" |
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35 |
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36 # When _chain()'ing copies in 'a' (from 'src' via some other commit 'mid') |
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37 # with copies in 'b' (from 'mid' to 'dst'), we can get the different cases |
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38 # in the following table (not including trivial cases). For example, case 2 |
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39 # is where a file existed in 'src' and remained under that name in 'mid' and |
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40 # then was renamed between 'mid' and 'dst'. |
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41 # |
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42 # case src mid dst result |
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43 # 1 x y - - |
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44 # 2 x y y x->y |
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45 # 3 x y x - |
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46 # 4 x y z x->z |
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47 # 5 - x y - |
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48 # 6 x x y x->y |
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49 # |
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50 # _chain() takes care of chaining the copies in 'a' and 'b', but it |
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51 # cannot tell the difference between cases 1 and 2, between 3 and 4, or |
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52 # between 5 and 6, so it includes all cases in its result. |
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53 # Cases 1, 3, and 5 are then removed by _filter(). |
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54 |
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55 for k, v in list(t.items()): |
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56 # remove copies from files that didn't exist |
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57 if v not in src: |
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58 del t[k] |
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59 # remove criss-crossed copies |
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60 elif k in src and v in dst: |
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61 del t[k] |
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62 # remove copies to files that were then removed |
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63 elif k not in dst: |
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64 del t[k] |
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65 |
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66 |
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67 def _chain(a, b): |
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68 """chain two sets of copies 'a' and 'b'""" |
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69 t = a.copy() |
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70 for k, v in pycompat.iteritems(b): |
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71 if v in t: |
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72 t[k] = t[v] |
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73 else: |
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74 t[k] = v |
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75 return t |
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76 |
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77 |
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78 def _tracefile(fctx, am, basemf): |
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79 """return file context that is the ancestor of fctx present in ancestor |
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80 manifest am |
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81 |
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82 Note: we used to try and stop after a given limit, however checking if that |
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83 limit is reached turned out to be very expensive. we are better off |
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84 disabling that feature.""" |
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85 |
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86 for f in fctx.ancestors(): |
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87 path = f.path() |
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88 if am.get(path, None) == f.filenode(): |
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89 return path |
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90 if basemf and basemf.get(path, None) == f.filenode(): |
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91 return path |
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92 |
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93 |
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94 def _dirstatecopies(repo, match=None): |
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95 ds = repo.dirstate |
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96 c = ds.copies().copy() |
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97 for k in list(c): |
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98 if ds[k] not in b'anm' or (match and not match(k)): |
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99 del c[k] |
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100 return c |
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101 |
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102 |
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103 def _computeforwardmissing(a, b, match=None): |
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104 """Computes which files are in b but not a. |
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105 This is its own function so extensions can easily wrap this call to see what |
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106 files _forwardcopies is about to process. |
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107 """ |
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108 ma = a.manifest() |
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109 mb = b.manifest() |
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110 return mb.filesnotin(ma, match=match) |
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111 |
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112 |
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113 def usechangesetcentricalgo(repo): |
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114 """Checks if we should use changeset-centric copy algorithms""" |
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115 if repo.filecopiesmode == b'changeset-sidedata': |
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116 return True |
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117 readfrom = repo.ui.config(b'experimental', b'copies.read-from') |
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118 changesetsource = (b'changeset-only', b'compatibility') |
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119 return readfrom in changesetsource |
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120 |
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121 |
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122 def _committedforwardcopies(a, b, base, match): |
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123 """Like _forwardcopies(), but b.rev() cannot be None (working copy)""" |
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124 # files might have to be traced back to the fctx parent of the last |
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125 # one-side-only changeset, but not further back than that |
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126 repo = a._repo |
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127 |
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128 if usechangesetcentricalgo(repo): |
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129 return _changesetforwardcopies(a, b, match) |
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130 |
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131 debug = repo.ui.debugflag and repo.ui.configbool(b'devel', b'debug.copies') |
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132 dbg = repo.ui.debug |
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133 if debug: |
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134 dbg(b'debug.copies: looking into rename from %s to %s\n' % (a, b)) |
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135 am = a.manifest() |
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136 basemf = None if base is None else base.manifest() |
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137 |
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138 # find where new files came from |
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139 # we currently don't try to find where old files went, too expensive |
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140 # this means we can miss a case like 'hg rm b; hg cp a b' |
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141 cm = {} |
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142 |
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143 # Computing the forward missing is quite expensive on large manifests, since |
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144 # it compares the entire manifests. We can optimize it in the common use |
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145 # case of computing what copies are in a commit versus its parent (like |
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146 # during a rebase or histedit). Note, we exclude merge commits from this |
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147 # optimization, since the ctx.files() for a merge commit is not correct for |
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148 # this comparison. |
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149 forwardmissingmatch = match |
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150 if b.p1() == a and b.p2().node() == node.nullid: |
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151 filesmatcher = matchmod.exact(b.files()) |
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152 forwardmissingmatch = matchmod.intersectmatchers(match, filesmatcher) |
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153 missing = _computeforwardmissing(a, b, match=forwardmissingmatch) |
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154 |
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155 ancestrycontext = a._repo.changelog.ancestors([b.rev()], inclusive=True) |
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156 |
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157 if debug: |
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158 dbg(b'debug.copies: missing files to search: %d\n' % len(missing)) |
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159 |
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160 for f in sorted(missing): |
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161 if debug: |
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162 dbg(b'debug.copies: tracing file: %s\n' % f) |
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163 fctx = b[f] |
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164 fctx._ancestrycontext = ancestrycontext |
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165 |
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166 if debug: |
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167 start = util.timer() |
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168 opath = _tracefile(fctx, am, basemf) |
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169 if opath: |
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170 if debug: |
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171 dbg(b'debug.copies: rename of: %s\n' % opath) |
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172 cm[f] = opath |
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173 if debug: |
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174 dbg( |
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175 b'debug.copies: time: %f seconds\n' |
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176 % (util.timer() - start) |
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177 ) |
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178 return cm |
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179 |
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180 |
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181 def _revinfogetter(repo): |
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182 """return a function that return multiple data given a <rev>"i |
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183 |
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184 * p1: revision number of first parent |
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185 * p2: revision number of first parent |
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186 * p1copies: mapping of copies from p1 |
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187 * p2copies: mapping of copies from p2 |
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188 * removed: a list of removed files |
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189 """ |
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190 cl = repo.changelog |
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191 parents = cl.parentrevs |
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192 |
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193 if repo.filecopiesmode == b'changeset-sidedata': |
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194 changelogrevision = cl.changelogrevision |
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195 flags = cl.flags |
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196 |
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197 def revinfo(rev): |
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198 p1, p2 = parents(rev) |
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199 if flags(rev) & REVIDX_SIDEDATA: |
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200 c = changelogrevision(rev) |
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201 p1copies = c.p1copies |
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202 p2copies = c.p2copies |
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203 removed = c.filesremoved |
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204 else: |
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205 p1copies = {} |
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206 p2copies = {} |
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207 removed = () |
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208 return p1, p2, p1copies, p2copies, removed |
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209 |
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210 else: |
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211 |
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212 def revinfo(rev): |
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213 p1, p2 = parents(rev) |
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214 ctx = repo[rev] |
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215 p1copies, p2copies = ctx._copies |
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216 removed = ctx.filesremoved() |
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217 return p1, p2, p1copies, p2copies, removed |
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218 |
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219 return revinfo |
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220 |
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221 |
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222 def _changesetforwardcopies(a, b, match): |
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223 if a.rev() in (node.nullrev, b.rev()): |
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224 return {} |
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225 |
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226 repo = a.repo().unfiltered() |
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227 children = {} |
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228 revinfo = _revinfogetter(repo) |
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229 |
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230 cl = repo.changelog |
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231 missingrevs = cl.findmissingrevs(common=[a.rev()], heads=[b.rev()]) |
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232 for r in missingrevs: |
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233 for p in cl.parentrevs(r): |
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234 if p == node.nullrev: |
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235 continue |
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236 if p not in children: |
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237 children[p] = [r] |
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238 else: |
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239 children[p].append(r) |
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240 |
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241 roots = set(children) - set(missingrevs) |
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242 work = list(roots) |
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243 all_copies = {r: {} for r in roots} |
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244 heapq.heapify(work) |
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245 alwaysmatch = match.always() |
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246 while work: |
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247 r = heapq.heappop(work) |
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248 copies = all_copies.pop(r) |
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249 if r == b.rev(): |
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250 return copies |
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251 for i, c in enumerate(children[r]): |
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252 p1, p2, p1copies, p2copies, removed = revinfo(c) |
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253 if r == p1: |
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254 parent = 1 |
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255 childcopies = p1copies |
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256 else: |
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257 assert r == p2 |
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258 parent = 2 |
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259 childcopies = p2copies |
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260 if not alwaysmatch: |
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261 childcopies = { |
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262 dst: src for dst, src in childcopies.items() if match(dst) |
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263 } |
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264 # Copy the dict only if later iterations will also need it |
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265 if i != len(children[r]) - 1: |
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266 newcopies = copies.copy() |
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267 else: |
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268 newcopies = copies |
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269 if childcopies: |
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270 newcopies = _chain(newcopies, childcopies) |
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271 for f in removed: |
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272 if f in newcopies: |
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273 del newcopies[f] |
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274 othercopies = all_copies.get(c) |
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275 if othercopies is None: |
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276 heapq.heappush(work, c) |
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277 all_copies[c] = newcopies |
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278 else: |
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279 # we are the second parent to work on c, we need to merge our |
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280 # work with the other. |
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281 # |
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282 # Unlike when copies are stored in the filelog, we consider |
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283 # it a copy even if the destination already existed on the |
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284 # other branch. It's simply too expensive to check if the |
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285 # file existed in the manifest. |
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286 # |
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287 # In case of conflict, parent 1 take precedence over parent 2. |
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288 # This is an arbitrary choice made anew when implementing |
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289 # changeset based copies. It was made without regards with |
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290 # potential filelog related behavior. |
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291 if parent == 1: |
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292 othercopies.update(newcopies) |
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293 else: |
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294 newcopies.update(othercopies) |
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295 all_copies[c] = newcopies |
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296 assert False |
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297 |
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298 |
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299 def _forwardcopies(a, b, base=None, match=None): |
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300 """find {dst@b: src@a} copy mapping where a is an ancestor of b""" |
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301 |
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302 if base is None: |
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303 base = a |
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304 match = a.repo().narrowmatch(match) |
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305 # check for working copy |
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306 if b.rev() is None: |
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307 cm = _committedforwardcopies(a, b.p1(), base, match) |
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308 # combine copies from dirstate if necessary |
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309 copies = _chain(cm, _dirstatecopies(b._repo, match)) |
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310 else: |
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311 copies = _committedforwardcopies(a, b, base, match) |
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312 return copies |
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313 |
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314 |
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315 def _backwardrenames(a, b, match): |
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316 if a._repo.ui.config(b'experimental', b'copytrace') == b'off': |
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317 return {} |
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318 |
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319 # Even though we're not taking copies into account, 1:n rename situations |
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320 # can still exist (e.g. hg cp a b; hg mv a c). In those cases we |
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321 # arbitrarily pick one of the renames. |
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322 # We don't want to pass in "match" here, since that would filter |
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323 # the destination by it. Since we're reversing the copies, we want |
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324 # to filter the source instead. |
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325 f = _forwardcopies(b, a) |
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326 r = {} |
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327 for k, v in sorted(pycompat.iteritems(f)): |
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328 if match and not match(v): |
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329 continue |
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330 # remove copies |
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331 if v in a: |
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332 continue |
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333 r[v] = k |
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334 return r |
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335 |
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336 |
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337 def pathcopies(x, y, match=None): |
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338 """find {dst@y: src@x} copy mapping for directed compare""" |
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339 repo = x._repo |
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340 debug = repo.ui.debugflag and repo.ui.configbool(b'devel', b'debug.copies') |
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341 if debug: |
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342 repo.ui.debug( |
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343 b'debug.copies: searching copies from %s to %s\n' % (x, y) |
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344 ) |
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345 if x == y or not x or not y: |
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346 return {} |
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347 a = y.ancestor(x) |
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348 if a == x: |
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349 if debug: |
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350 repo.ui.debug(b'debug.copies: search mode: forward\n') |
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351 if y.rev() is None and x == y.p1(): |
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352 # short-circuit to avoid issues with merge states |
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353 return _dirstatecopies(repo, match) |
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354 copies = _forwardcopies(x, y, match=match) |
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355 elif a == y: |
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356 if debug: |
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357 repo.ui.debug(b'debug.copies: search mode: backward\n') |
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358 copies = _backwardrenames(x, y, match=match) |
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359 else: |
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360 if debug: |
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361 repo.ui.debug(b'debug.copies: search mode: combined\n') |
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362 base = None |
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363 if a.rev() != node.nullrev: |
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364 base = x |
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365 copies = _chain( |
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366 _backwardrenames(x, a, match=match), |
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367 _forwardcopies(a, y, base, match=match), |
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368 ) |
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369 _filter(x, y, copies) |
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370 return copies |
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371 |
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372 |
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373 def mergecopies(repo, c1, c2, base): |
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374 """ |
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375 Finds moves and copies between context c1 and c2 that are relevant for |
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376 merging. 'base' will be used as the merge base. |
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377 |
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378 Copytracing is used in commands like rebase, merge, unshelve, etc to merge |
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379 files that were moved/ copied in one merge parent and modified in another. |
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380 For example: |
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381 |
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382 o ---> 4 another commit |
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383 | |
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384 | o ---> 3 commit that modifies a.txt |
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385 | / |
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386 o / ---> 2 commit that moves a.txt to b.txt |
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387 |/ |
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388 o ---> 1 merge base |
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389 |
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390 If we try to rebase revision 3 on revision 4, since there is no a.txt in |
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391 revision 4, and if user have copytrace disabled, we prints the following |
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392 message: |
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393 |
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394 ```other changed <file> which local deleted``` |
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395 |
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396 Returns five dicts: "copy", "movewithdir", "diverge", "renamedelete" and |
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397 "dirmove". |
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398 |
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399 "copy" is a mapping from destination name -> source name, |
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400 where source is in c1 and destination is in c2 or vice-versa. |
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401 |
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402 "movewithdir" is a mapping from source name -> destination name, |
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403 where the file at source present in one context but not the other |
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404 needs to be moved to destination by the merge process, because the |
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405 other context moved the directory it is in. |
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406 |
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407 "diverge" is a mapping of source name -> list of destination names |
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408 for divergent renames. |
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409 |
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410 "renamedelete" is a mapping of source name -> list of destination |
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411 names for files deleted in c1 that were renamed in c2 or vice-versa. |
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412 |
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413 "dirmove" is a mapping of detected source dir -> destination dir renames. |
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414 This is needed for handling changes to new files previously grafted into |
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415 renamed directories. |
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416 |
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417 This function calls different copytracing algorithms based on config. |
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418 """ |
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419 # avoid silly behavior for update from empty dir |
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420 if not c1 or not c2 or c1 == c2: |
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421 return {}, {}, {}, {}, {} |
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422 |
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423 narrowmatch = c1.repo().narrowmatch() |
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424 |
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425 # avoid silly behavior for parent -> working dir |
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426 if c2.node() is None and c1.node() == repo.dirstate.p1(): |
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427 return _dirstatecopies(repo, narrowmatch), {}, {}, {}, {} |
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428 |
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429 copytracing = repo.ui.config(b'experimental', b'copytrace') |
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430 if stringutil.parsebool(copytracing) is False: |
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431 # stringutil.parsebool() returns None when it is unable to parse the |
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432 # value, so we should rely on making sure copytracing is on such cases |
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433 return {}, {}, {}, {}, {} |
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434 |
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435 if usechangesetcentricalgo(repo): |
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436 # The heuristics don't make sense when we need changeset-centric algos |
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437 return _fullcopytracing(repo, c1, c2, base) |
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438 |
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439 # Copy trace disabling is explicitly below the node == p1 logic above |
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440 # because the logic above is required for a simple copy to be kept across a |
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441 # rebase. |
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442 if copytracing == b'heuristics': |
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443 # Do full copytracing if only non-public revisions are involved as |
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444 # that will be fast enough and will also cover the copies which could |
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445 # be missed by heuristics |
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446 if _isfullcopytraceable(repo, c1, base): |
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447 return _fullcopytracing(repo, c1, c2, base) |
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448 return _heuristicscopytracing(repo, c1, c2, base) |
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449 else: |
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450 return _fullcopytracing(repo, c1, c2, base) |
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451 |
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452 |
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453 def _isfullcopytraceable(repo, c1, base): |
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454 """ Checks that if base, source and destination are all no-public branches, |
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455 if yes let's use the full copytrace algorithm for increased capabilities |
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456 since it will be fast enough. |
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457 |
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458 `experimental.copytrace.sourcecommitlimit` can be used to set a limit for |
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459 number of changesets from c1 to base such that if number of changesets are |
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460 more than the limit, full copytracing algorithm won't be used. |
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461 """ |
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462 if c1.rev() is None: |
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463 c1 = c1.p1() |
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464 if c1.mutable() and base.mutable(): |
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465 sourcecommitlimit = repo.ui.configint( |
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466 b'experimental', b'copytrace.sourcecommitlimit' |
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467 ) |
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468 commits = len(repo.revs(b'%d::%d', base.rev(), c1.rev())) |
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469 return commits < sourcecommitlimit |
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470 return False |
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471 |
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472 |
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473 def _checksinglesidecopies( |
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474 src, dsts1, m1, m2, mb, c2, base, copy, renamedelete |
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475 ): |
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476 if src not in m2: |
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477 # deleted on side 2 |
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478 if src not in m1: |
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479 # renamed on side 1, deleted on side 2 |
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480 renamedelete[src] = dsts1 |
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481 elif m2[src] != mb[src]: |
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482 if not _related(c2[src], base[src]): |
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483 return |
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484 # modified on side 2 |
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485 for dst in dsts1: |
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486 if dst not in m2: |
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487 # dst not added on side 2 (handle as regular |
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488 # "both created" case in manifestmerge otherwise) |
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489 copy[dst] = src |
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490 |
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491 |
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492 def _fullcopytracing(repo, c1, c2, base): |
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493 """ The full copytracing algorithm which finds all the new files that were |
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494 added from merge base up to the top commit and for each file it checks if |
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|
495 this file was copied from another file. |
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496 |
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497 This is pretty slow when a lot of changesets are involved but will track all |
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498 the copies. |
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499 """ |
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500 m1 = c1.manifest() |
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501 m2 = c2.manifest() |
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502 mb = base.manifest() |
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503 |
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504 copies1 = pathcopies(base, c1) |
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505 copies2 = pathcopies(base, c2) |
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506 |
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507 inversecopies1 = {} |
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508 inversecopies2 = {} |
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509 for dst, src in copies1.items(): |
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510 inversecopies1.setdefault(src, []).append(dst) |
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511 for dst, src in copies2.items(): |
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512 inversecopies2.setdefault(src, []).append(dst) |
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513 |
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514 copy = {} |
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515 diverge = {} |
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516 renamedelete = {} |
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517 allsources = set(inversecopies1) | set(inversecopies2) |
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518 for src in allsources: |
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519 dsts1 = inversecopies1.get(src) |
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520 dsts2 = inversecopies2.get(src) |
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521 if dsts1 and dsts2: |
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522 # copied/renamed on both sides |
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523 if src not in m1 and src not in m2: |
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524 # renamed on both sides |
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525 dsts1 = set(dsts1) |
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526 dsts2 = set(dsts2) |
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527 # If there's some overlap in the rename destinations, we |
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528 # consider it not divergent. For example, if side 1 copies 'a' |
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529 # to 'b' and 'c' and deletes 'a', and side 2 copies 'a' to 'c' |
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530 # and 'd' and deletes 'a'. |
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531 if dsts1 & dsts2: |
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532 for dst in dsts1 & dsts2: |
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533 copy[dst] = src |
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534 else: |
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535 diverge[src] = sorted(dsts1 | dsts2) |
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536 elif src in m1 and src in m2: |
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537 # copied on both sides |
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538 dsts1 = set(dsts1) |
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539 dsts2 = set(dsts2) |
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540 for dst in dsts1 & dsts2: |
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541 copy[dst] = src |
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542 # TODO: Handle cases where it was renamed on one side and copied |
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543 # on the other side |
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544 elif dsts1: |
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545 # copied/renamed only on side 1 |
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546 _checksinglesidecopies( |
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547 src, dsts1, m1, m2, mb, c2, base, copy, renamedelete |
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548 ) |
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549 elif dsts2: |
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550 # copied/renamed only on side 2 |
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551 _checksinglesidecopies( |
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552 src, dsts2, m2, m1, mb, c1, base, copy, renamedelete |
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553 ) |
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554 |
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555 renamedeleteset = set() |
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556 divergeset = set() |
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557 for dsts in diverge.values(): |
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558 divergeset.update(dsts) |
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559 for dsts in renamedelete.values(): |
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560 renamedeleteset.update(dsts) |
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561 |
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562 # find interesting file sets from manifests |
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563 addedinm1 = m1.filesnotin(mb, repo.narrowmatch()) |
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564 addedinm2 = m2.filesnotin(mb, repo.narrowmatch()) |
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565 u1 = sorted(addedinm1 - addedinm2) |
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566 u2 = sorted(addedinm2 - addedinm1) |
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567 |
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568 header = b" unmatched files in %s" |
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569 if u1: |
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570 repo.ui.debug(b"%s:\n %s\n" % (header % b'local', b"\n ".join(u1))) |
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571 if u2: |
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572 repo.ui.debug(b"%s:\n %s\n" % (header % b'other', b"\n ".join(u2))) |
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573 |
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574 fullcopy = copies1.copy() |
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575 fullcopy.update(copies2) |
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576 if not fullcopy: |
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577 return copy, {}, diverge, renamedelete, {} |
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578 |
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579 if repo.ui.debugflag: |
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580 repo.ui.debug( |
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581 b" all copies found (* = to merge, ! = divergent, " |
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582 b"% = renamed and deleted):\n" |
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583 ) |
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584 for f in sorted(fullcopy): |
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585 note = b"" |
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586 if f in copy: |
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587 note += b"*" |
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588 if f in divergeset: |
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589 note += b"!" |
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590 if f in renamedeleteset: |
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591 note += b"%" |
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592 repo.ui.debug( |
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593 b" src: '%s' -> dst: '%s' %s\n" % (fullcopy[f], f, note) |
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594 ) |
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595 del divergeset |
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596 |
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597 repo.ui.debug(b" checking for directory renames\n") |
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598 |
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|
599 # generate a directory move map |
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600 d1, d2 = c1.dirs(), c2.dirs() |
17055
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|
601 invalid = set() |
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|
602 dirmove = {} |
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603 |
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|
604 # examine each file copy for a potential directory move, which is |
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605 # when all the files in a directory are moved to a new directory |
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|
606 for dst, src in pycompat.iteritems(fullcopy): |
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|
607 dsrc, ddst = pathutil.dirname(src), pathutil.dirname(dst) |
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608 if dsrc in invalid: |
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|
609 # already seen to be uninteresting |
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610 continue |
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611 elif dsrc in d1 and ddst in d1: |
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612 # directory wasn't entirely moved locally |
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613 invalid.add(dsrc) |
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614 elif dsrc in d2 and ddst in d2: |
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615 # directory wasn't entirely moved remotely |
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616 invalid.add(dsrc) |
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617 elif dsrc in dirmove and dirmove[dsrc] != ddst: |
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618 # files from the same directory moved to two different places |
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619 invalid.add(dsrc) |
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620 else: |
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621 # looks good so far |
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622 dirmove[dsrc] = ddst |
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623 |
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624 for i in invalid: |
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625 if i in dirmove: |
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626 del dirmove[i] |
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627 del d1, d2, invalid |
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|
628 |
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|
629 if not dirmove: |
30581
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Gábor Stefanik <gabor.stefanik@nng.com>
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|
630 return copy, {}, diverge, renamedelete, {} |
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631 |
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632 dirmove = {k + b"/": v + b"/" for k, v in pycompat.iteritems(dirmove)} |
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633 |
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634 for d in dirmove: |
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635 repo.ui.debug( |
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636 b" discovered dir src: '%s' -> dst: '%s'\n" % (d, dirmove[d]) |
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637 ) |
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638 |
30183
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|
639 movewithdir = {} |
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|
640 # check unaccounted nonoverlapping files against directory moves |
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641 for f in u1 + u2: |
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642 if f not in fullcopy: |
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643 for d in dirmove: |
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|
644 if f.startswith(d): |
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645 # new file added in a directory that was moved, move it |
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646 df = dirmove[d] + f[len(d) :] |
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647 if df not in copy: |
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648 movewithdir[f] = df |
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649 repo.ui.debug( |
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650 b" pending file src: '%s' -> dst: '%s'\n" |
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651 % (f, df) |
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652 ) |
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653 break |
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654 |
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655 return copy, movewithdir, diverge, renamedelete, dirmove |
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656 |
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657 |
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658 def _heuristicscopytracing(repo, c1, c2, base): |
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659 """ Fast copytracing using filename heuristics |
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660 |
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661 Assumes that moves or renames are of following two types: |
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662 |
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663 1) Inside a directory only (same directory name but different filenames) |
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664 2) Move from one directory to another |
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665 (same filenames but different directory names) |
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666 |
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667 Works only when there are no merge commits in the "source branch". |
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668 Source branch is commits from base up to c2 not including base. |
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669 |
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670 If merge is involved it fallbacks to _fullcopytracing(). |
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671 |
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672 Can be used by setting the following config: |
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673 |
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674 [experimental] |
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675 copytrace = heuristics |
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676 |
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677 In some cases the copy/move candidates found by heuristics can be very large |
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678 in number and that will make the algorithm slow. The number of possible |
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679 candidates to check can be limited by using the config |
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680 `experimental.copytrace.movecandidateslimit` which defaults to 100. |
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681 """ |
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682 |
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683 if c1.rev() is None: |
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684 c1 = c1.p1() |
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685 if c2.rev() is None: |
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686 c2 = c2.p1() |
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687 |
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688 copies = {} |
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689 |
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690 changedfiles = set() |
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691 m1 = c1.manifest() |
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692 if not repo.revs(b'%d::%d', base.rev(), c2.rev()): |
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693 # If base is not in c2 branch, we switch to fullcopytracing |
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694 repo.ui.debug( |
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695 b"switching to full copytracing as base is not " |
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696 b"an ancestor of c2\n" |
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697 ) |
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698 return _fullcopytracing(repo, c1, c2, base) |
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699 |
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700 ctx = c2 |
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701 while ctx != base: |
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702 if len(ctx.parents()) == 2: |
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703 # To keep things simple let's not handle merges |
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704 repo.ui.debug(b"switching to full copytracing because of merges\n") |
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705 return _fullcopytracing(repo, c1, c2, base) |
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706 changedfiles.update(ctx.files()) |
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707 ctx = ctx.p1() |
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708 |
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709 cp = _forwardcopies(base, c2) |
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710 for dst, src in pycompat.iteritems(cp): |
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711 if src in m1: |
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712 copies[dst] = src |
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713 |
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714 # file is missing if it isn't present in the destination, but is present in |
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715 # the base and present in the source. |
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716 # Presence in the base is important to exclude added files, presence in the |
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717 # source is important to exclude removed files. |
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718 filt = lambda f: f not in m1 and f in base and f in c2 |
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719 missingfiles = [f for f in changedfiles if filt(f)] |
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720 |
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721 if missingfiles: |
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722 basenametofilename = collections.defaultdict(list) |
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723 dirnametofilename = collections.defaultdict(list) |
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724 |
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725 for f in m1.filesnotin(base.manifest()): |
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726 basename = os.path.basename(f) |
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727 dirname = os.path.dirname(f) |
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728 basenametofilename[basename].append(f) |
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729 dirnametofilename[dirname].append(f) |
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730 |
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731 for f in missingfiles: |
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732 basename = os.path.basename(f) |
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733 dirname = os.path.dirname(f) |
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734 samebasename = basenametofilename[basename] |
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735 samedirname = dirnametofilename[dirname] |
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736 movecandidates = samebasename + samedirname |
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737 # f is guaranteed to be present in c2, that's why |
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738 # c2.filectx(f) won't fail |
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739 f2 = c2.filectx(f) |
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740 # we can have a lot of candidates which can slow down the heuristics |
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741 # config value to limit the number of candidates moves to check |
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742 maxcandidates = repo.ui.configint( |
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743 b'experimental', b'copytrace.movecandidateslimit' |
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744 ) |
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745 |
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746 if len(movecandidates) > maxcandidates: |
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747 repo.ui.status( |
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748 _( |
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749 b"skipping copytracing for '%s', more " |
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750 b"candidates than the limit: %d\n" |
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751 ) |
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752 % (f, len(movecandidates)) |
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753 ) |
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754 continue |
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755 |
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756 for candidate in movecandidates: |
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757 f1 = c1.filectx(candidate) |
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758 if _related(f1, f2): |
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759 # if there are a few related copies then we'll merge |
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760 # changes into all of them. This matches the behaviour |
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761 # of upstream copytracing |
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762 copies[candidate] = f |
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763 |
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764 return copies, {}, {}, {}, {} |
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765 |
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766 |
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767 def _related(f1, f2): |
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768 """return True if f1 and f2 filectx have a common ancestor |
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769 |
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770 Walk back to common ancestor to see if the two files originate |
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771 from the same file. Since workingfilectx's rev() is None it messes |
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772 up the integer comparison logic, hence the pre-step check for |
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773 None (f1 and f2 can only be workingfilectx's initially). |
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774 """ |
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775 |
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776 if f1 == f2: |
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777 return True # a match |
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778 |
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779 g1, g2 = f1.ancestors(), f2.ancestors() |
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780 try: |
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781 f1r, f2r = f1.linkrev(), f2.linkrev() |
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782 |
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783 if f1r is None: |
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784 f1 = next(g1) |
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785 if f2r is None: |
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786 f2 = next(g2) |
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787 |
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788 while True: |
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789 f1r, f2r = f1.linkrev(), f2.linkrev() |
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790 if f1r > f2r: |
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791 f1 = next(g1) |
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792 elif f2r > f1r: |
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793 f2 = next(g2) |
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794 else: # f1 and f2 point to files in the same linkrev |
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795 return f1 == f2 # true if they point to the same file |
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796 except StopIteration: |
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797 return False |
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798 |
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799 |
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800 def duplicatecopies(repo, wctx, rev, fromrev, skiprev=None): |
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801 """reproduce copies from fromrev to rev in the dirstate |
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802 |
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803 If skiprev is specified, it's a revision that should be used to |
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804 filter copy records. Any copies that occur between fromrev and |
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805 skiprev will not be duplicated, even if they appear in the set of |
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806 copies between fromrev and rev. |
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807 """ |
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808 exclude = {} |
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809 ctraceconfig = repo.ui.config(b'experimental', b'copytrace') |
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810 bctrace = stringutil.parsebool(ctraceconfig) |
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811 if skiprev is not None and ( |
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812 ctraceconfig == b'heuristics' or bctrace or bctrace is None |
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813 ): |
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814 # copytrace='off' skips this line, but not the entire function because |
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815 # the line below is O(size of the repo) during a rebase, while the rest |
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816 # of the function is much faster (and is required for carrying copy |
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817 # metadata across the rebase anyway). |
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818 exclude = pathcopies(repo[fromrev], repo[skiprev]) |
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819 for dst, src in pycompat.iteritems(pathcopies(repo[fromrev], repo[rev])): |
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820 if dst in exclude: |
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821 continue |
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822 if dst in wctx: |
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823 wctx[dst].markcopied(src) |
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824 |
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825 |
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826 def computechangesetfilesadded(ctx): |
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827 """return the list of files added in a changeset |
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828 """ |
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829 added = [] |
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830 for f in ctx.files(): |
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831 if not any(f in p for p in ctx.parents()): |
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832 added.append(f) |
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833 return added |
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834 |
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835 |
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836 def computechangesetfilesremoved(ctx): |
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837 """return the list of files removed in a changeset |
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838 """ |
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839 removed = [] |
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840 for f in ctx.files(): |
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841 if f not in ctx: |
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842 removed.append(f) |
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843 return removed |
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844 |
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845 |
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846 def computechangesetcopies(ctx): |
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847 """return the copies data for a changeset |
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848 |
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849 The copies data are returned as a pair of dictionnary (p1copies, p2copies). |
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850 |
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851 Each dictionnary are in the form: `{newname: oldname}` |
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852 """ |
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853 p1copies = {} |
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854 p2copies = {} |
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855 p1 = ctx.p1() |
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856 p2 = ctx.p2() |
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857 narrowmatch = ctx._repo.narrowmatch() |
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858 for dst in ctx.files(): |
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859 if not narrowmatch(dst) or dst not in ctx: |
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860 continue |
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861 copied = ctx[dst].renamed() |
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862 if not copied: |
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863 continue |
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864 src, srcnode = copied |
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|
865 if src in p1 and p1[src].filenode() == srcnode: |
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866 p1copies[dst] = src |
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867 elif src in p2 and p2[src].filenode() == srcnode: |
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868 p2copies[dst] = src |
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869 return p1copies, p2copies |
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870 |
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871 |
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872 def encodecopies(files, copies): |
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873 items = [] |
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874 for i, dst in enumerate(files): |
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875 if dst in copies: |
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876 items.append(b'%d\0%s' % (i, copies[dst])) |
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877 if len(items) != len(copies): |
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878 raise error.ProgrammingError( |
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879 b'some copy targets missing from file list' |
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880 ) |
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881 return b"\n".join(items) |
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882 |
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883 |
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884 def decodecopies(files, data): |
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885 try: |
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886 copies = {} |
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887 if not data: |
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888 return copies |
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|
889 for l in data.split(b'\n'): |
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890 strindex, src = l.split(b'\0') |
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891 i = int(strindex) |
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892 dst = files[i] |
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893 copies[dst] = src |
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894 return copies |
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|
895 except (ValueError, IndexError): |
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896 # Perhaps someone had chosen the same key name (e.g. "p1copies") and |
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897 # used different syntax for the value. |
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|
898 return None |
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|
899 |
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|
900 |
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|
901 def encodefileindices(files, subset): |
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902 subset = set(subset) |
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|
903 indices = [] |
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|
904 for i, f in enumerate(files): |
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|
905 if f in subset: |
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|
906 indices.append(b'%d' % i) |
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|
907 return b'\n'.join(indices) |
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|
908 |
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|
909 |
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|
910 def decodefileindices(files, data): |
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|
911 try: |
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|
912 subset = [] |
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|
913 if not data: |
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|
914 return subset |
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|
915 for strindex in data.split(b'\n'): |
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|
916 i = int(strindex) |
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|
917 if i < 0 or i >= len(files): |
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|
918 return None |
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|
919 subset.append(files[i]) |
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|
920 return subset |
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|
921 except (ValueError, IndexError): |
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|
922 # Perhaps someone had chosen the same key name (e.g. "added") and |
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|
923 # used different syntax for the value. |
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|
924 return None |
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|
925 |
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|
926 |
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|
927 def _getsidedata(srcrepo, rev): |
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|
928 ctx = srcrepo[rev] |
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|
929 filescopies = computechangesetcopies(ctx) |
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|
930 filesadded = computechangesetfilesadded(ctx) |
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|
931 filesremoved = computechangesetfilesremoved(ctx) |
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|
932 sidedata = {} |
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|
933 if any([filescopies, filesadded, filesremoved]): |
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|
934 sortedfiles = sorted(ctx.files()) |
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|
935 p1copies, p2copies = filescopies |
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|
936 p1copies = encodecopies(sortedfiles, p1copies) |
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|
937 p2copies = encodecopies(sortedfiles, p2copies) |
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|
938 filesadded = encodefileindices(sortedfiles, filesadded) |
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|
939 filesremoved = encodefileindices(sortedfiles, filesremoved) |
43231
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diff
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|
940 if p1copies: |
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diff
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|
941 sidedata[sidedatamod.SD_P1COPIES] = p1copies |
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|
942 if p2copies: |
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diff
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|
943 sidedata[sidedatamod.SD_P2COPIES] = p2copies |
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|
944 if filesadded: |
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diff
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|
945 sidedata[sidedatamod.SD_FILESADDED] = filesadded |
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|
946 if filesremoved: |
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|
947 sidedata[sidedatamod.SD_FILESREMOVED] = filesremoved |
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|
948 return sidedata |
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|
949 |
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|
950 |
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|
951 def getsidedataadder(srcrepo, destrepo): |
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|
952 def sidedatacompanion(revlog, rev): |
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|
953 sidedata = {} |
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|
954 if util.safehasattr(revlog, 'filteredrevs'): # this is a changelog |
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|
955 sidedata = _getsidedata(srcrepo, rev) |
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|
956 return False, (), sidedata |
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|
957 |
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|
958 return sidedatacompanion |
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|
959 |
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|
960 |
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|
961 def getsidedataremover(srcrepo, destrepo): |
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|
962 def sidedatacompanion(revlog, rev): |
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|
963 f = () |
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|
964 if util.safehasattr(revlog, 'filteredrevs'): # this is a changelog |
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|
965 if revlog.flags(rev) & REVIDX_SIDEDATA: |
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|
966 f = ( |
843da18386d5
sidedatacopies: deal with upgrading and downgrading to that format
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
43147
diff
changeset
|
967 sidedatamod.SD_P1COPIES, |
843da18386d5
sidedatacopies: deal with upgrading and downgrading to that format
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
43147
diff
changeset
|
968 sidedatamod.SD_P2COPIES, |
843da18386d5
sidedatacopies: deal with upgrading and downgrading to that format
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
43147
diff
changeset
|
969 sidedatamod.SD_FILESADDED, |
843da18386d5
sidedatacopies: deal with upgrading and downgrading to that format
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
43147
diff
changeset
|
970 sidedatamod.SD_FILESREMOVED, |
843da18386d5
sidedatacopies: deal with upgrading and downgrading to that format
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
43147
diff
changeset
|
971 ) |
843da18386d5
sidedatacopies: deal with upgrading and downgrading to that format
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
43147
diff
changeset
|
972 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
|
973 |
843da18386d5
sidedatacopies: deal with upgrading and downgrading to that format
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
43147
diff
changeset
|
974 return sidedatacompanion |