Mercurial > hg
annotate mercurial/copies.py @ 44092:833210fbd900
graftcopies: remove `skip` and `repo` arguments
The `skip` argument was added in 2ba6c9b4e0eb (rebase: fix bug that
caused transitive copy records to disappear (issue4192), 2014-06-07)
in order to fix https://bz.mercurial-scm.org/show_bug.cgi?id=4192. I
ran tests at that commit without the `skiprev` argument and the only
difference I noticed was that `test-rebase-collapse.t` failed
differently, in the call that is now on line 501. Without the
`skiprev` argument, that call would end up creating another commit
because it tried to record an invalid copy. With the previous patch in
this series, such invalid copies are no longer recorded, so it seems
we don't need the `skip` argument anymore.
I also removed the `repo` argument since that also becomes unused with
the removal of the `skip` argument.
Differential Revision: https://phab.mercurial-scm.org/D7860
author | Martin von Zweigbergk <martinvonz@google.com> |
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date | Fri, 27 Dec 2019 13:47:59 -0800 |
parents | 3df0bd706c40 |
children | 06e7e7652ac0 |
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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 multiprocessing |
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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(prefix, suffix): |
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68 """chain two sets of copies 'prefix' and 'suffix'""" |
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69 result = prefix.copy() |
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70 for key, value in pycompat.iteritems(suffix): |
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71 result[key] = prefix.get(value, value) |
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72 return result |
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73 |
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74 |
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75 def _tracefile(fctx, am, basemf): |
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76 """return file context that is the ancestor of fctx present in ancestor |
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77 manifest am |
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78 |
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79 Note: we used to try and stop after a given limit, however checking if that |
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80 limit is reached turned out to be very expensive. we are better off |
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81 disabling that feature.""" |
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82 |
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83 for f in fctx.ancestors(): |
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84 path = f.path() |
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85 if am.get(path, None) == f.filenode(): |
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86 return path |
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87 if basemf and basemf.get(path, None) == f.filenode(): |
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88 return path |
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89 |
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90 |
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91 def _dirstatecopies(repo, match=None): |
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92 ds = repo.dirstate |
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93 c = ds.copies().copy() |
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94 for k in list(c): |
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95 if ds[k] not in b'anm' or (match and not match(k)): |
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96 del c[k] |
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97 return c |
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98 |
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99 |
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100 def _computeforwardmissing(a, b, match=None): |
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101 """Computes which files are in b but not a. |
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102 This is its own function so extensions can easily wrap this call to see what |
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103 files _forwardcopies is about to process. |
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104 """ |
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105 ma = a.manifest() |
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106 mb = b.manifest() |
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107 return mb.filesnotin(ma, match=match) |
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108 |
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109 |
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110 def usechangesetcentricalgo(repo): |
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111 """Checks if we should use changeset-centric copy algorithms""" |
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112 if repo.filecopiesmode == b'changeset-sidedata': |
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113 return True |
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114 readfrom = repo.ui.config(b'experimental', b'copies.read-from') |
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115 changesetsource = (b'changeset-only', b'compatibility') |
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116 return readfrom in changesetsource |
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117 |
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118 |
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119 def _committedforwardcopies(a, b, base, match): |
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120 """Like _forwardcopies(), but b.rev() cannot be None (working copy)""" |
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121 # files might have to be traced back to the fctx parent of the last |
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122 # one-side-only changeset, but not further back than that |
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123 repo = a._repo |
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124 |
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125 if usechangesetcentricalgo(repo): |
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126 return _changesetforwardcopies(a, b, match) |
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127 |
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128 debug = repo.ui.debugflag and repo.ui.configbool(b'devel', b'debug.copies') |
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129 dbg = repo.ui.debug |
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130 if debug: |
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131 dbg(b'debug.copies: looking into rename from %s to %s\n' % (a, b)) |
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132 am = a.manifest() |
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133 basemf = None if base is None else base.manifest() |
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134 |
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135 # find where new files came from |
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136 # we currently don't try to find where old files went, too expensive |
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137 # this means we can miss a case like 'hg rm b; hg cp a b' |
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138 cm = {} |
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139 |
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140 # Computing the forward missing is quite expensive on large manifests, since |
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141 # it compares the entire manifests. We can optimize it in the common use |
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142 # case of computing what copies are in a commit versus its parent (like |
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143 # during a rebase or histedit). Note, we exclude merge commits from this |
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144 # optimization, since the ctx.files() for a merge commit is not correct for |
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145 # this comparison. |
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146 forwardmissingmatch = match |
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147 if b.p1() == a and b.p2().node() == node.nullid: |
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148 filesmatcher = matchmod.exact(b.files()) |
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149 forwardmissingmatch = matchmod.intersectmatchers(match, filesmatcher) |
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150 missing = _computeforwardmissing(a, b, match=forwardmissingmatch) |
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151 |
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152 ancestrycontext = a._repo.changelog.ancestors([b.rev()], inclusive=True) |
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153 |
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154 if debug: |
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155 dbg(b'debug.copies: missing files to search: %d\n' % len(missing)) |
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156 |
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157 for f in sorted(missing): |
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158 if debug: |
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159 dbg(b'debug.copies: tracing file: %s\n' % f) |
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160 fctx = b[f] |
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161 fctx._ancestrycontext = ancestrycontext |
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162 |
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163 if debug: |
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164 start = util.timer() |
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165 opath = _tracefile(fctx, am, basemf) |
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166 if opath: |
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167 if debug: |
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168 dbg(b'debug.copies: rename of: %s\n' % opath) |
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169 cm[f] = opath |
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170 if debug: |
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171 dbg( |
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172 b'debug.copies: time: %f seconds\n' |
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173 % (util.timer() - start) |
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174 ) |
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175 return cm |
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176 |
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177 |
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178 def _revinfogetter(repo): |
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179 """return a function that return multiple data given a <rev>"i |
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180 |
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181 * p1: revision number of first parent |
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182 * p2: revision number of first parent |
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183 * p1copies: mapping of copies from p1 |
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184 * p2copies: mapping of copies from p2 |
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185 * removed: a list of removed files |
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186 """ |
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187 cl = repo.changelog |
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188 parents = cl.parentrevs |
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189 |
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190 if repo.filecopiesmode == b'changeset-sidedata': |
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191 changelogrevision = cl.changelogrevision |
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192 flags = cl.flags |
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193 |
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194 # A small cache to avoid doing the work twice for merges |
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195 # |
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196 # In the vast majority of cases, if we ask information for a revision |
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197 # about 1 parent, we'll later ask it for the other. So it make sense to |
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198 # keep the information around when reaching the first parent of a merge |
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199 # and dropping it after it was provided for the second parents. |
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200 # |
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201 # It exists cases were only one parent of the merge will be walked. It |
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202 # happens when the "destination" the copy tracing is descendant from a |
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203 # new root, not common with the "source". In that case, we will only walk |
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204 # through merge parents that are descendant of changesets common |
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205 # between "source" and "destination". |
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206 # |
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207 # With the current case implementation if such changesets have a copy |
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208 # information, we'll keep them in memory until the end of |
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209 # _changesetforwardcopies. We don't expect the case to be frequent |
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210 # enough to matters. |
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211 # |
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212 # In addition, it would be possible to reach pathological case, were |
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213 # many first parent are met before any second parent is reached. In |
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214 # that case the cache could grow. If this even become an issue one can |
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215 # safely introduce a maximum cache size. This would trade extra CPU/IO |
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216 # time to save memory. |
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217 merge_caches = {} |
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218 |
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219 def revinfo(rev): |
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220 p1, p2 = parents(rev) |
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221 if flags(rev) & REVIDX_SIDEDATA: |
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222 e = merge_caches.pop(rev, None) |
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223 if e is not None: |
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224 return e |
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225 c = changelogrevision(rev) |
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226 p1copies = c.p1copies |
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227 p2copies = c.p2copies |
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228 removed = c.filesremoved |
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229 if p1 != node.nullrev and p2 != node.nullrev: |
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230 # XXX some case we over cache, IGNORE |
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231 merge_caches[rev] = (p1, p2, p1copies, p2copies, removed) |
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232 else: |
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233 p1copies = {} |
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234 p2copies = {} |
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235 removed = [] |
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236 return p1, p2, p1copies, p2copies, removed |
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237 |
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238 else: |
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239 |
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240 def revinfo(rev): |
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241 p1, p2 = parents(rev) |
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242 ctx = repo[rev] |
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243 p1copies, p2copies = ctx._copies |
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244 removed = ctx.filesremoved() |
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245 return p1, p2, p1copies, p2copies, removed |
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246 |
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247 return revinfo |
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248 |
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249 |
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250 def _changesetforwardcopies(a, b, match): |
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251 if a.rev() in (node.nullrev, b.rev()): |
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252 return {} |
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253 |
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254 repo = a.repo().unfiltered() |
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255 children = {} |
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256 revinfo = _revinfogetter(repo) |
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257 |
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258 cl = repo.changelog |
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259 missingrevs = cl.findmissingrevs(common=[a.rev()], heads=[b.rev()]) |
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260 mrset = set(missingrevs) |
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261 roots = set() |
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262 for r in missingrevs: |
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263 for p in cl.parentrevs(r): |
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264 if p == node.nullrev: |
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265 continue |
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266 if p not in children: |
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267 children[p] = [r] |
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268 else: |
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269 children[p].append(r) |
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270 if p not in mrset: |
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271 roots.add(p) |
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272 if not roots: |
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273 # no common revision to track copies from |
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274 return {} |
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275 min_root = min(roots) |
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276 |
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277 from_head = set( |
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278 cl.reachableroots(min_root, [b.rev()], list(roots), includepath=True) |
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279 ) |
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280 |
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281 iterrevs = set(from_head) |
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282 iterrevs &= mrset |
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283 iterrevs.update(roots) |
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284 iterrevs.remove(b.rev()) |
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285 revs = sorted(iterrevs) |
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286 return _combinechangesetcopies(revs, children, b.rev(), revinfo, match) |
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287 |
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288 |
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289 def _combinechangesetcopies(revs, children, targetrev, revinfo, match): |
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290 """combine the copies information for each item of iterrevs |
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291 |
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292 revs: sorted iterable of revision to visit |
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293 children: a {parent: [children]} mapping. |
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294 targetrev: the final copies destination revision (not in iterrevs) |
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295 revinfo(rev): a function that return (p1, p2, p1copies, p2copies, removed) |
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296 match: a matcher |
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297 |
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298 It returns the aggregated copies information for `targetrev`. |
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299 """ |
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300 all_copies = {} |
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301 alwaysmatch = match.always() |
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302 for r in revs: |
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303 copies = all_copies.pop(r, None) |
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304 if copies is None: |
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305 # this is a root |
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306 copies = {} |
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307 for i, c in enumerate(children[r]): |
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308 p1, p2, p1copies, p2copies, removed = revinfo(c) |
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309 if r == p1: |
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310 parent = 1 |
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311 childcopies = p1copies |
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312 else: |
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313 assert r == p2 |
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314 parent = 2 |
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315 childcopies = p2copies |
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316 if not alwaysmatch: |
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317 childcopies = { |
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318 dst: src for dst, src in childcopies.items() if match(dst) |
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319 } |
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320 newcopies = copies |
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321 if childcopies: |
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322 newcopies = _chain(newcopies, childcopies) |
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323 # _chain makes a copies, we can avoid doing so in some |
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324 # simple/linear cases. |
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325 assert newcopies is not copies |
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326 for f in removed: |
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327 if f in newcopies: |
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328 if newcopies is copies: |
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329 # copy on write to avoid affecting potential other |
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330 # branches. when there are no other branches, this |
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331 # could be avoided. |
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332 newcopies = copies.copy() |
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333 del newcopies[f] |
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334 othercopies = all_copies.get(c) |
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335 if othercopies is None: |
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336 all_copies[c] = newcopies |
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337 else: |
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338 # we are the second parent to work on c, we need to merge our |
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339 # work with the other. |
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340 # |
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341 # Unlike when copies are stored in the filelog, we consider |
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342 # it a copy even if the destination already existed on the |
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343 # other branch. It's simply too expensive to check if the |
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344 # file existed in the manifest. |
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345 # |
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346 # In case of conflict, parent 1 take precedence over parent 2. |
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347 # This is an arbitrary choice made anew when implementing |
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348 # changeset based copies. It was made without regards with |
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349 # potential filelog related behavior. |
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350 if parent == 1: |
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351 othercopies.update(newcopies) |
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352 else: |
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353 newcopies.update(othercopies) |
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354 all_copies[c] = newcopies |
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355 return all_copies[targetrev] |
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356 |
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357 |
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358 def _forwardcopies(a, b, base=None, match=None): |
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359 """find {dst@b: src@a} copy mapping where a is an ancestor of b""" |
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360 |
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361 if base is None: |
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362 base = a |
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363 match = a.repo().narrowmatch(match) |
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364 # check for working copy |
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365 if b.rev() is None: |
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366 cm = _committedforwardcopies(a, b.p1(), base, match) |
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367 # combine copies from dirstate if necessary |
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368 copies = _chain(cm, _dirstatecopies(b._repo, match)) |
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369 else: |
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370 copies = _committedforwardcopies(a, b, base, match) |
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371 return copies |
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372 |
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373 |
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374 def _backwardrenames(a, b, match): |
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375 if a._repo.ui.config(b'experimental', b'copytrace') == b'off': |
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376 return {} |
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377 |
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378 # Even though we're not taking copies into account, 1:n rename situations |
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379 # can still exist (e.g. hg cp a b; hg mv a c). In those cases we |
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380 # arbitrarily pick one of the renames. |
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381 # We don't want to pass in "match" here, since that would filter |
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382 # the destination by it. Since we're reversing the copies, we want |
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383 # to filter the source instead. |
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384 f = _forwardcopies(b, a) |
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385 r = {} |
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386 for k, v in sorted(pycompat.iteritems(f)): |
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387 if match and not match(v): |
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388 continue |
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389 # remove copies |
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390 if v in a: |
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391 continue |
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392 r[v] = k |
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393 return r |
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394 |
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395 |
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396 def pathcopies(x, y, match=None): |
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397 """find {dst@y: src@x} copy mapping for directed compare""" |
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398 repo = x._repo |
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399 debug = repo.ui.debugflag and repo.ui.configbool(b'devel', b'debug.copies') |
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400 if debug: |
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401 repo.ui.debug( |
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402 b'debug.copies: searching copies from %s to %s\n' % (x, y) |
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403 ) |
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404 if x == y or not x or not y: |
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405 return {} |
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406 a = y.ancestor(x) |
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407 if a == x: |
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408 if debug: |
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409 repo.ui.debug(b'debug.copies: search mode: forward\n') |
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410 if y.rev() is None and x == y.p1(): |
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411 # short-circuit to avoid issues with merge states |
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412 return _dirstatecopies(repo, match) |
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413 copies = _forwardcopies(x, y, match=match) |
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414 elif a == y: |
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415 if debug: |
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416 repo.ui.debug(b'debug.copies: search mode: backward\n') |
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417 copies = _backwardrenames(x, y, match=match) |
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418 else: |
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419 if debug: |
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420 repo.ui.debug(b'debug.copies: search mode: combined\n') |
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421 base = None |
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422 if a.rev() != node.nullrev: |
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423 base = x |
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424 copies = _chain( |
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425 _backwardrenames(x, a, match=match), |
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426 _forwardcopies(a, y, base, match=match), |
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427 ) |
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428 _filter(x, y, copies) |
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429 return copies |
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430 |
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431 |
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432 def mergecopies(repo, c1, c2, base): |
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433 """ |
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434 Finds moves and copies between context c1 and c2 that are relevant for |
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435 merging. 'base' will be used as the merge base. |
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436 |
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437 Copytracing is used in commands like rebase, merge, unshelve, etc to merge |
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438 files that were moved/ copied in one merge parent and modified in another. |
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439 For example: |
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440 |
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441 o ---> 4 another commit |
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442 | |
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443 | o ---> 3 commit that modifies a.txt |
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444 | / |
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445 o / ---> 2 commit that moves a.txt to b.txt |
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446 |/ |
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447 o ---> 1 merge base |
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448 |
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449 If we try to rebase revision 3 on revision 4, since there is no a.txt in |
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450 revision 4, and if user have copytrace disabled, we prints the following |
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451 message: |
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452 |
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453 ```other changed <file> which local deleted``` |
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454 |
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455 Returns five dicts: "copy", "movewithdir", "diverge", "renamedelete" and |
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456 "dirmove". |
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457 |
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458 "copy" is a mapping from destination name -> source name, |
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459 where source is in c1 and destination is in c2 or vice-versa. |
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460 |
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461 "movewithdir" is a mapping from source name -> destination name, |
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462 where the file at source present in one context but not the other |
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463 needs to be moved to destination by the merge process, because the |
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464 other context moved the directory it is in. |
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465 |
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466 "diverge" is a mapping of source name -> list of destination names |
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467 for divergent renames. |
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468 |
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469 "renamedelete" is a mapping of source name -> list of destination |
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470 names for files deleted in c1 that were renamed in c2 or vice-versa. |
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471 |
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472 "dirmove" is a mapping of detected source dir -> destination dir renames. |
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473 This is needed for handling changes to new files previously grafted into |
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474 renamed directories. |
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475 |
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476 This function calls different copytracing algorithms based on config. |
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477 """ |
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478 # avoid silly behavior for update from empty dir |
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479 if not c1 or not c2 or c1 == c2: |
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480 return {}, {}, {}, {}, {} |
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481 |
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482 narrowmatch = c1.repo().narrowmatch() |
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483 |
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484 # avoid silly behavior for parent -> working dir |
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485 if c2.node() is None and c1.node() == repo.dirstate.p1(): |
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486 return _dirstatecopies(repo, narrowmatch), {}, {}, {}, {} |
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487 |
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488 copytracing = repo.ui.config(b'experimental', b'copytrace') |
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489 if stringutil.parsebool(copytracing) is False: |
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490 # stringutil.parsebool() returns None when it is unable to parse the |
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491 # value, so we should rely on making sure copytracing is on such cases |
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492 return {}, {}, {}, {}, {} |
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493 |
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494 if usechangesetcentricalgo(repo): |
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495 # The heuristics don't make sense when we need changeset-centric algos |
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496 return _fullcopytracing(repo, c1, c2, base) |
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497 |
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498 # Copy trace disabling is explicitly below the node == p1 logic above |
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499 # because the logic above is required for a simple copy to be kept across a |
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500 # rebase. |
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501 if copytracing == b'heuristics': |
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502 # Do full copytracing if only non-public revisions are involved as |
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503 # that will be fast enough and will also cover the copies which could |
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504 # be missed by heuristics |
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505 if _isfullcopytraceable(repo, c1, base): |
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506 return _fullcopytracing(repo, c1, c2, base) |
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507 return _heuristicscopytracing(repo, c1, c2, base) |
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508 else: |
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509 return _fullcopytracing(repo, c1, c2, base) |
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510 |
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511 |
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512 def _isfullcopytraceable(repo, c1, base): |
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513 """ Checks that if base, source and destination are all no-public branches, |
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514 if yes let's use the full copytrace algorithm for increased capabilities |
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515 since it will be fast enough. |
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516 |
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517 `experimental.copytrace.sourcecommitlimit` can be used to set a limit for |
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518 number of changesets from c1 to base such that if number of changesets are |
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519 more than the limit, full copytracing algorithm won't be used. |
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520 """ |
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521 if c1.rev() is None: |
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522 c1 = c1.p1() |
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523 if c1.mutable() and base.mutable(): |
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524 sourcecommitlimit = repo.ui.configint( |
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525 b'experimental', b'copytrace.sourcecommitlimit' |
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526 ) |
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527 commits = len(repo.revs(b'%d::%d', base.rev(), c1.rev())) |
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528 return commits < sourcecommitlimit |
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529 return False |
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530 |
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531 |
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532 def _checksinglesidecopies( |
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533 src, dsts1, m1, m2, mb, c2, base, copy, renamedelete |
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534 ): |
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535 if src not in m2: |
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536 # deleted on side 2 |
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537 if src not in m1: |
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538 # renamed on side 1, deleted on side 2 |
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539 renamedelete[src] = dsts1 |
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540 elif m2[src] != mb[src]: |
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541 if not _related(c2[src], base[src]): |
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542 return |
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543 # modified on side 2 |
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544 for dst in dsts1: |
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545 if dst not in m2: |
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546 # dst not added on side 2 (handle as regular |
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547 # "both created" case in manifestmerge otherwise) |
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548 copy[dst] = src |
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549 |
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550 |
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551 def _fullcopytracing(repo, c1, c2, base): |
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552 """ The full copytracing algorithm which finds all the new files that were |
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553 added from merge base up to the top commit and for each file it checks if |
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554 this file was copied from another file. |
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555 |
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556 This is pretty slow when a lot of changesets are involved but will track all |
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557 the copies. |
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558 """ |
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559 m1 = c1.manifest() |
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560 m2 = c2.manifest() |
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561 mb = base.manifest() |
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562 |
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563 copies1 = pathcopies(base, c1) |
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564 copies2 = pathcopies(base, c2) |
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565 |
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566 inversecopies1 = {} |
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567 inversecopies2 = {} |
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568 for dst, src in copies1.items(): |
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569 inversecopies1.setdefault(src, []).append(dst) |
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570 for dst, src in copies2.items(): |
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571 inversecopies2.setdefault(src, []).append(dst) |
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572 |
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573 copy = {} |
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574 diverge = {} |
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575 renamedelete = {} |
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576 allsources = set(inversecopies1) | set(inversecopies2) |
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577 for src in allsources: |
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578 dsts1 = inversecopies1.get(src) |
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579 dsts2 = inversecopies2.get(src) |
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580 if dsts1 and dsts2: |
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581 # copied/renamed on both sides |
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582 if src not in m1 and src not in m2: |
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583 # renamed on both sides |
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584 dsts1 = set(dsts1) |
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585 dsts2 = set(dsts2) |
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586 # If there's some overlap in the rename destinations, we |
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587 # consider it not divergent. For example, if side 1 copies 'a' |
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588 # to 'b' and 'c' and deletes 'a', and side 2 copies 'a' to 'c' |
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589 # and 'd' and deletes 'a'. |
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590 if dsts1 & dsts2: |
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591 for dst in dsts1 & dsts2: |
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592 copy[dst] = src |
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593 else: |
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594 diverge[src] = sorted(dsts1 | dsts2) |
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595 elif src in m1 and src in m2: |
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596 # copied on both sides |
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597 dsts1 = set(dsts1) |
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598 dsts2 = set(dsts2) |
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599 for dst in dsts1 & dsts2: |
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600 copy[dst] = src |
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601 # TODO: Handle cases where it was renamed on one side and copied |
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602 # on the other side |
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603 elif dsts1: |
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604 # copied/renamed only on side 1 |
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605 _checksinglesidecopies( |
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606 src, dsts1, m1, m2, mb, c2, base, copy, renamedelete |
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607 ) |
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608 elif dsts2: |
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609 # copied/renamed only on side 2 |
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610 _checksinglesidecopies( |
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611 src, dsts2, m2, m1, mb, c1, base, copy, renamedelete |
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612 ) |
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613 |
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614 renamedeleteset = set() |
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615 divergeset = set() |
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616 for dsts in diverge.values(): |
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617 divergeset.update(dsts) |
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618 for dsts in renamedelete.values(): |
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619 renamedeleteset.update(dsts) |
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620 |
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621 # find interesting file sets from manifests |
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622 addedinm1 = m1.filesnotin(mb, repo.narrowmatch()) |
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623 addedinm2 = m2.filesnotin(mb, repo.narrowmatch()) |
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624 u1 = sorted(addedinm1 - addedinm2) |
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625 u2 = sorted(addedinm2 - addedinm1) |
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626 |
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627 header = b" unmatched files in %s" |
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628 if u1: |
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629 repo.ui.debug(b"%s:\n %s\n" % (header % b'local', b"\n ".join(u1))) |
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630 if u2: |
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631 repo.ui.debug(b"%s:\n %s\n" % (header % b'other', b"\n ".join(u2))) |
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632 |
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633 fullcopy = copies1.copy() |
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634 fullcopy.update(copies2) |
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635 if not fullcopy: |
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636 return copy, {}, diverge, renamedelete, {} |
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637 |
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638 if repo.ui.debugflag: |
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639 repo.ui.debug( |
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640 b" all copies found (* = to merge, ! = divergent, " |
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641 b"% = renamed and deleted):\n" |
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642 ) |
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643 for f in sorted(fullcopy): |
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644 note = b"" |
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645 if f in copy: |
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646 note += b"*" |
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647 if f in divergeset: |
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648 note += b"!" |
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649 if f in renamedeleteset: |
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650 note += b"%" |
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651 repo.ui.debug( |
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652 b" src: '%s' -> dst: '%s' %s\n" % (fullcopy[f], f, note) |
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653 ) |
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654 del divergeset |
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655 |
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656 repo.ui.debug(b" checking for directory renames\n") |
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657 |
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658 # generate a directory move map |
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659 d1, d2 = c1.dirs(), c2.dirs() |
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660 invalid = set() |
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661 dirmove = {} |
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662 |
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663 # examine each file copy for a potential directory move, which is |
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664 # when all the files in a directory are moved to a new directory |
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665 for dst, src in pycompat.iteritems(fullcopy): |
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666 dsrc, ddst = pathutil.dirname(src), pathutil.dirname(dst) |
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667 if dsrc in invalid: |
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668 # already seen to be uninteresting |
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669 continue |
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670 elif dsrc in d1 and ddst in d1: |
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671 # directory wasn't entirely moved locally |
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672 invalid.add(dsrc) |
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673 elif dsrc in d2 and ddst in d2: |
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674 # directory wasn't entirely moved remotely |
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675 invalid.add(dsrc) |
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676 elif dsrc in dirmove and dirmove[dsrc] != ddst: |
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677 # files from the same directory moved to two different places |
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678 invalid.add(dsrc) |
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679 else: |
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680 # looks good so far |
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681 dirmove[dsrc] = ddst |
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682 |
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683 for i in invalid: |
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684 if i in dirmove: |
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685 del dirmove[i] |
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686 del d1, d2, invalid |
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687 |
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688 if not dirmove: |
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689 return copy, {}, diverge, renamedelete, {} |
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690 |
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691 dirmove = {k + b"/": v + b"/" for k, v in pycompat.iteritems(dirmove)} |
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692 |
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693 for d in dirmove: |
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694 repo.ui.debug( |
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695 b" discovered dir src: '%s' -> dst: '%s'\n" % (d, dirmove[d]) |
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696 ) |
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697 |
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698 movewithdir = {} |
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699 # check unaccounted nonoverlapping files against directory moves |
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700 for f in u1 + u2: |
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701 if f not in fullcopy: |
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702 for d in dirmove: |
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703 if f.startswith(d): |
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704 # new file added in a directory that was moved, move it |
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705 df = dirmove[d] + f[len(d) :] |
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706 if df not in copy: |
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707 movewithdir[f] = df |
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708 repo.ui.debug( |
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709 b" pending file src: '%s' -> dst: '%s'\n" |
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710 % (f, df) |
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711 ) |
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712 break |
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|
713 |
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|
714 return copy, movewithdir, diverge, renamedelete, dirmove |
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715 |
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716 |
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717 def _heuristicscopytracing(repo, c1, c2, base): |
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718 """ Fast copytracing using filename heuristics |
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719 |
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720 Assumes that moves or renames are of following two types: |
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721 |
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722 1) Inside a directory only (same directory name but different filenames) |
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723 2) Move from one directory to another |
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724 (same filenames but different directory names) |
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725 |
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726 Works only when there are no merge commits in the "source branch". |
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727 Source branch is commits from base up to c2 not including base. |
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728 |
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729 If merge is involved it fallbacks to _fullcopytracing(). |
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730 |
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731 Can be used by setting the following config: |
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732 |
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733 [experimental] |
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734 copytrace = heuristics |
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735 |
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736 In some cases the copy/move candidates found by heuristics can be very large |
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737 in number and that will make the algorithm slow. The number of possible |
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738 candidates to check can be limited by using the config |
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739 `experimental.copytrace.movecandidateslimit` which defaults to 100. |
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740 """ |
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741 |
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742 if c1.rev() is None: |
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743 c1 = c1.p1() |
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744 if c2.rev() is None: |
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745 c2 = c2.p1() |
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746 |
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747 copies = {} |
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748 |
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749 changedfiles = set() |
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750 m1 = c1.manifest() |
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751 if not repo.revs(b'%d::%d', base.rev(), c2.rev()): |
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752 # If base is not in c2 branch, we switch to fullcopytracing |
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753 repo.ui.debug( |
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754 b"switching to full copytracing as base is not " |
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755 b"an ancestor of c2\n" |
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756 ) |
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757 return _fullcopytracing(repo, c1, c2, base) |
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758 |
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759 ctx = c2 |
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760 while ctx != base: |
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761 if len(ctx.parents()) == 2: |
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762 # To keep things simple let's not handle merges |
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763 repo.ui.debug(b"switching to full copytracing because of merges\n") |
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764 return _fullcopytracing(repo, c1, c2, base) |
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765 changedfiles.update(ctx.files()) |
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766 ctx = ctx.p1() |
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767 |
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768 cp = _forwardcopies(base, c2) |
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769 for dst, src in pycompat.iteritems(cp): |
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770 if src in m1: |
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771 copies[dst] = src |
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772 |
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773 # file is missing if it isn't present in the destination, but is present in |
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774 # the base and present in the source. |
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775 # Presence in the base is important to exclude added files, presence in the |
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776 # source is important to exclude removed files. |
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777 filt = lambda f: f not in m1 and f in base and f in c2 |
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778 missingfiles = [f for f in changedfiles if filt(f)] |
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779 |
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780 if missingfiles: |
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781 basenametofilename = collections.defaultdict(list) |
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782 dirnametofilename = collections.defaultdict(list) |
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783 |
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784 for f in m1.filesnotin(base.manifest()): |
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785 basename = os.path.basename(f) |
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786 dirname = os.path.dirname(f) |
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787 basenametofilename[basename].append(f) |
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788 dirnametofilename[dirname].append(f) |
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789 |
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790 for f in missingfiles: |
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791 basename = os.path.basename(f) |
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792 dirname = os.path.dirname(f) |
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793 samebasename = basenametofilename[basename] |
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794 samedirname = dirnametofilename[dirname] |
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795 movecandidates = samebasename + samedirname |
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796 # f is guaranteed to be present in c2, that's why |
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797 # c2.filectx(f) won't fail |
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798 f2 = c2.filectx(f) |
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799 # we can have a lot of candidates which can slow down the heuristics |
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800 # config value to limit the number of candidates moves to check |
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801 maxcandidates = repo.ui.configint( |
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802 b'experimental', b'copytrace.movecandidateslimit' |
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803 ) |
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804 |
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805 if len(movecandidates) > maxcandidates: |
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806 repo.ui.status( |
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807 _( |
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808 b"skipping copytracing for '%s', more " |
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809 b"candidates than the limit: %d\n" |
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810 ) |
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811 % (f, len(movecandidates)) |
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812 ) |
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813 continue |
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814 |
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815 for candidate in movecandidates: |
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816 f1 = c1.filectx(candidate) |
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817 if _related(f1, f2): |
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818 # if there are a few related copies then we'll merge |
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819 # changes into all of them. This matches the behaviour |
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820 # of upstream copytracing |
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821 copies[candidate] = f |
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822 |
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823 return copies, {}, {}, {}, {} |
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824 |
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825 |
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826 def _related(f1, f2): |
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827 """return True if f1 and f2 filectx have a common ancestor |
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828 |
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829 Walk back to common ancestor to see if the two files originate |
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830 from the same file. Since workingfilectx's rev() is None it messes |
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831 up the integer comparison logic, hence the pre-step check for |
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832 None (f1 and f2 can only be workingfilectx's initially). |
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833 """ |
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834 |
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835 if f1 == f2: |
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836 return True # a match |
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837 |
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838 g1, g2 = f1.ancestors(), f2.ancestors() |
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839 try: |
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840 f1r, f2r = f1.linkrev(), f2.linkrev() |
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841 |
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842 if f1r is None: |
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843 f1 = next(g1) |
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844 if f2r is None: |
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845 f2 = next(g2) |
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846 |
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847 while True: |
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848 f1r, f2r = f1.linkrev(), f2.linkrev() |
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849 if f1r > f2r: |
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850 f1 = next(g1) |
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851 elif f2r > f1r: |
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852 f2 = next(g2) |
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853 else: # f1 and f2 point to files in the same linkrev |
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854 return f1 == f2 # true if they point to the same file |
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855 except StopIteration: |
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856 return False |
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857 |
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858 |
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859 def graftcopies(wctx, ctx, base): |
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860 """reproduce copies between base and ctx in the wctx""" |
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861 new_copies = pathcopies(base, ctx) |
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862 _filter(wctx.p1(), wctx, new_copies) |
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863 for dst, src in pycompat.iteritems(new_copies): |
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864 wctx[dst].markcopied(src) |
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865 |
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866 |
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867 def computechangesetfilesadded(ctx): |
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868 """return the list of files added in a changeset |
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869 """ |
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870 added = [] |
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871 for f in ctx.files(): |
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872 if not any(f in p for p in ctx.parents()): |
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873 added.append(f) |
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874 return added |
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875 |
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876 |
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877 def computechangesetfilesremoved(ctx): |
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878 """return the list of files removed in a changeset |
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879 """ |
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880 removed = [] |
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881 for f in ctx.files(): |
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882 if f not in ctx: |
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883 removed.append(f) |
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884 return removed |
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885 |
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886 |
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887 def computechangesetcopies(ctx): |
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888 """return the copies data for a changeset |
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889 |
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890 The copies data are returned as a pair of dictionnary (p1copies, p2copies). |
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891 |
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892 Each dictionnary are in the form: `{newname: oldname}` |
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893 """ |
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894 p1copies = {} |
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895 p2copies = {} |
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896 p1 = ctx.p1() |
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897 p2 = ctx.p2() |
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898 narrowmatch = ctx._repo.narrowmatch() |
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899 for dst in ctx.files(): |
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900 if not narrowmatch(dst) or dst not in ctx: |
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901 continue |
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902 copied = ctx[dst].renamed() |
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903 if not copied: |
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904 continue |
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905 src, srcnode = copied |
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906 if src in p1 and p1[src].filenode() == srcnode: |
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907 p1copies[dst] = src |
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908 elif src in p2 and p2[src].filenode() == srcnode: |
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909 p2copies[dst] = src |
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910 return p1copies, p2copies |
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911 |
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912 |
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913 def encodecopies(files, copies): |
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914 items = [] |
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915 for i, dst in enumerate(files): |
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916 if dst in copies: |
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917 items.append(b'%d\0%s' % (i, copies[dst])) |
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918 if len(items) != len(copies): |
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919 raise error.ProgrammingError( |
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920 b'some copy targets missing from file list' |
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921 ) |
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922 return b"\n".join(items) |
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923 |
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924 |
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925 def decodecopies(files, data): |
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926 try: |
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927 copies = {} |
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928 if not data: |
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929 return copies |
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930 for l in data.split(b'\n'): |
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931 strindex, src = l.split(b'\0') |
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932 i = int(strindex) |
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933 dst = files[i] |
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934 copies[dst] = src |
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935 return copies |
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936 except (ValueError, IndexError): |
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|
937 # Perhaps someone had chosen the same key name (e.g. "p1copies") and |
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938 # used different syntax for the value. |
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939 return None |
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|
940 |
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|
941 |
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942 def encodefileindices(files, subset): |
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943 subset = set(subset) |
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944 indices = [] |
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|
945 for i, f in enumerate(files): |
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|
946 if f in subset: |
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|
947 indices.append(b'%d' % i) |
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948 return b'\n'.join(indices) |
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949 |
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950 |
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|
951 def decodefileindices(files, data): |
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952 try: |
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953 subset = [] |
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954 if not data: |
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955 return subset |
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|
956 for strindex in data.split(b'\n'): |
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957 i = int(strindex) |
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958 if i < 0 or i >= len(files): |
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|
959 return None |
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|
960 subset.append(files[i]) |
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|
961 return subset |
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|
962 except (ValueError, IndexError): |
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|
963 # Perhaps someone had chosen the same key name (e.g. "added") and |
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|
964 # used different syntax for the value. |
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|
965 return None |
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966 |
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967 |
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|
968 def _getsidedata(srcrepo, rev): |
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969 ctx = srcrepo[rev] |
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|
970 filescopies = computechangesetcopies(ctx) |
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|
971 filesadded = computechangesetfilesadded(ctx) |
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|
972 filesremoved = computechangesetfilesremoved(ctx) |
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973 sidedata = {} |
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974 if any([filescopies, filesadded, filesremoved]): |
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975 sortedfiles = sorted(ctx.files()) |
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976 p1copies, p2copies = filescopies |
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977 p1copies = encodecopies(sortedfiles, p1copies) |
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978 p2copies = encodecopies(sortedfiles, p2copies) |
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979 filesadded = encodefileindices(sortedfiles, filesadded) |
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980 filesremoved = encodefileindices(sortedfiles, filesremoved) |
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981 if p1copies: |
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982 sidedata[sidedatamod.SD_P1COPIES] = p1copies |
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983 if p2copies: |
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984 sidedata[sidedatamod.SD_P2COPIES] = p2copies |
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985 if filesadded: |
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986 sidedata[sidedatamod.SD_FILESADDED] = filesadded |
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987 if filesremoved: |
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988 sidedata[sidedatamod.SD_FILESREMOVED] = filesremoved |
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989 return sidedata |
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990 |
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991 |
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992 def getsidedataadder(srcrepo, destrepo): |
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993 use_w = srcrepo.ui.configbool(b'experimental', b'worker.repository-upgrade') |
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994 if pycompat.iswindows or not use_w: |
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995 return _get_simple_sidedata_adder(srcrepo, destrepo) |
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996 else: |
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997 return _get_worker_sidedata_adder(srcrepo, destrepo) |
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998 |
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999 |
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1000 def _sidedata_worker(srcrepo, revs_queue, sidedata_queue, tokens): |
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1001 """The function used by worker precomputing sidedata |
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1002 |
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1003 It read an input queue containing revision numbers |
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1004 It write in an output queue containing (rev, <sidedata-map>) |
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1005 |
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1006 The `None` input value is used as a stop signal. |
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1007 |
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1008 The `tokens` semaphore is user to avoid having too many unprocessed |
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1009 entries. The workers needs to acquire one token before fetching a task. |
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1010 They will be released by the consumer of the produced data. |
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1011 """ |
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1012 tokens.acquire() |
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1013 rev = revs_queue.get() |
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1014 while rev is not None: |
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1015 data = _getsidedata(srcrepo, rev) |
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1016 sidedata_queue.put((rev, data)) |
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1017 tokens.acquire() |
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1018 rev = revs_queue.get() |
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1019 # processing of `None` is completed, release the token. |
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1020 tokens.release() |
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1021 |
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1022 |
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1023 BUFF_PER_WORKER = 50 |
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1024 |
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1025 |
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1026 def _get_worker_sidedata_adder(srcrepo, destrepo): |
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1027 """The parallel version of the sidedata computation |
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1028 |
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1029 This code spawn a pool of worker that precompute a buffer of sidedata |
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1030 before we actually need them""" |
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1031 # avoid circular import copies -> scmutil -> worker -> copies |
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1032 from . import worker |
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1033 |
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1034 nbworkers = worker._numworkers(srcrepo.ui) |
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1035 |
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1036 tokens = multiprocessing.BoundedSemaphore(nbworkers * BUFF_PER_WORKER) |
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1037 revsq = multiprocessing.Queue() |
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1038 sidedataq = multiprocessing.Queue() |
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1039 |
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1040 assert srcrepo.filtername is None |
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1041 # queue all tasks beforehand, revision numbers are small and it make |
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1042 # synchronisation simpler |
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1043 # |
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1044 # Since the computation for each node can be quite expensive, the overhead |
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1045 # of using a single queue is not revelant. In practice, most computation |
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1046 # are fast but some are very expensive and dominate all the other smaller |
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1047 # cost. |
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1048 for r in srcrepo.changelog.revs(): |
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1049 revsq.put(r) |
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1050 # queue the "no more tasks" markers |
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1051 for i in range(nbworkers): |
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1052 revsq.put(None) |
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1053 |
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1054 allworkers = [] |
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1055 for i in range(nbworkers): |
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1056 args = (srcrepo, revsq, sidedataq, tokens) |
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1057 w = multiprocessing.Process(target=_sidedata_worker, args=args) |
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1058 allworkers.append(w) |
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1059 w.start() |
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1060 |
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1061 # dictionnary to store results for revision higher than we one we are |
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1062 # looking for. For example, if we need the sidedatamap for 42, and 43 is |
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1063 # received, when shelve 43 for later use. |
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1064 staging = {} |
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1065 |
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1066 def sidedata_companion(revlog, rev): |
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1067 sidedata = {} |
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1068 if util.safehasattr(revlog, b'filteredrevs'): # this is a changelog |
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1069 # Is the data previously shelved ? |
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1070 sidedata = staging.pop(rev, None) |
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1071 if sidedata is None: |
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1072 # look at the queued result until we find the one we are lookig |
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1073 # for (shelve the other ones) |
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1074 r, sidedata = sidedataq.get() |
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1075 while r != rev: |
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1076 staging[r] = sidedata |
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1077 r, sidedata = sidedataq.get() |
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1078 tokens.release() |
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1079 return False, (), sidedata |
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1080 |
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1081 return sidedata_companion |
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1082 |
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1083 |
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1084 def _get_simple_sidedata_adder(srcrepo, destrepo): |
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1085 """The simple version of the sidedata computation |
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1086 |
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1087 It just compute it in the same thread on request""" |
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1088 |
43148
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1089 def sidedatacompanion(revlog, rev): |
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1090 sidedata = {} |
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1091 if util.safehasattr(revlog, 'filteredrevs'): # this is a changelog |
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1092 sidedata = _getsidedata(srcrepo, rev) |
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1093 return False, (), sidedata |
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1094 |
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1095 return sidedatacompanion |
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1096 |
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1097 |
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1098 def getsidedataremover(srcrepo, destrepo): |
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1099 def sidedatacompanion(revlog, rev): |
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1100 f = () |
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1101 if util.safehasattr(revlog, 'filteredrevs'): # this is a changelog |
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1102 if revlog.flags(rev) & REVIDX_SIDEDATA: |
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1103 f = ( |
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1104 sidedatamod.SD_P1COPIES, |
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1105 sidedatamod.SD_P2COPIES, |
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1106 sidedatamod.SD_FILESADDED, |
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1107 sidedatamod.SD_FILESREMOVED, |
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1108 ) |
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1109 return False, f, {} |
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1110 |
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1111 return sidedatacompanion |