Mercurial > hg
annotate mercurial/copies.py @ 43146:0171483b082f
sidedatacopies: read rename information from sidedata
Repository using the new format now use changeset centric algorithm and read the
copies information from the changelog sidedata.
Differential Revision: https://phab.mercurial-scm.org/D6953
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Wed, 09 Oct 2019 22:59:38 +0200 |
parents | 8ff1ecfadcd1 |
children | 54e943b28101 |
rev | line source |
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1 # copies.py - copy detection for Mercurial |
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2 # |
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3 # Copyright 2008 Matt Mackall <mpm@selenic.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 from __future__ import absolute_import |
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9 |
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10 import collections |
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11 import heapq |
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12 import os |
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13 |
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14 from .i18n import _ |
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15 |
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16 from . import ( |
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17 match as matchmod, |
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18 node, |
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19 pathutil, |
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20 pycompat, |
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21 util, |
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22 ) |
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23 from .utils import stringutil |
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24 |
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25 |
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26 def _findlimit(repo, ctxa, ctxb): |
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27 """ |
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28 Find the last revision that needs to be checked to ensure that a full |
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29 transitive closure for file copies can be properly calculated. |
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30 Generally, this means finding the earliest revision number that's an |
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31 ancestor of a or b but not both, except when a or b is a direct descendent |
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32 of the other, in which case we can return the minimum revnum of a and b. |
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33 """ |
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34 |
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35 # basic idea: |
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36 # - mark a and b with different sides |
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37 # - if a parent's children are all on the same side, the parent is |
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38 # on that side, otherwise it is on no side |
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39 # - walk the graph in topological order with the help of a heap; |
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40 # - add unseen parents to side map |
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41 # - clear side of any parent that has children on different sides |
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42 # - track number of interesting revs that might still be on a side |
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43 # - track the lowest interesting rev seen |
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44 # - quit when interesting revs is zero |
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45 |
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46 cl = repo.changelog |
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47 wdirparents = None |
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48 a = ctxa.rev() |
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49 b = ctxb.rev() |
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50 if a is None: |
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51 wdirparents = (ctxa.p1(), ctxa.p2()) |
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52 a = node.wdirrev |
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53 if b is None: |
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54 assert not wdirparents |
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55 wdirparents = (ctxb.p1(), ctxb.p2()) |
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56 b = node.wdirrev |
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57 |
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58 side = {a: -1, b: 1} |
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59 visit = [-a, -b] |
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60 heapq.heapify(visit) |
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61 interesting = len(visit) |
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62 limit = node.wdirrev |
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63 |
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64 while interesting: |
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65 r = -(heapq.heappop(visit)) |
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66 if r == node.wdirrev: |
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67 parents = [pctx.rev() for pctx in wdirparents] |
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68 else: |
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69 parents = cl.parentrevs(r) |
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70 if parents[1] == node.nullrev: |
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71 parents = parents[:1] |
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72 for p in parents: |
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73 if p not in side: |
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74 # first time we see p; add it to visit |
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75 side[p] = side[r] |
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76 if side[p]: |
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77 interesting += 1 |
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78 heapq.heappush(visit, -p) |
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79 elif side[p] and side[p] != side[r]: |
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80 # p was interesting but now we know better |
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81 side[p] = 0 |
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82 interesting -= 1 |
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83 if side[r]: |
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84 limit = r # lowest rev visited |
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85 interesting -= 1 |
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86 |
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87 # Consider the following flow (see test-commit-amend.t under issue4405): |
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88 # 1/ File 'a0' committed |
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89 # 2/ File renamed from 'a0' to 'a1' in a new commit (call it 'a1') |
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90 # 3/ Move back to first commit |
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91 # 4/ Create a new commit via revert to contents of 'a1' (call it 'a1-amend') |
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92 # 5/ Rename file from 'a1' to 'a2' and commit --amend 'a1-msg' |
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93 # |
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94 # During the amend in step five, we will be in this state: |
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95 # |
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96 # @ 3 temporary amend commit for a1-amend |
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97 # | |
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98 # o 2 a1-amend |
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99 # | |
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100 # | o 1 a1 |
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101 # |/ |
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102 # o 0 a0 |
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103 # |
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104 # When _findlimit is called, a and b are revs 3 and 0, so limit will be 2, |
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105 # yet the filelog has the copy information in rev 1 and we will not look |
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106 # back far enough unless we also look at the a and b as candidates. |
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107 # This only occurs when a is a descendent of b or visa-versa. |
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108 return min(limit, a, b) |
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109 |
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110 |
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111 def _filter(src, dst, t): |
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112 """filters out invalid copies after chaining""" |
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113 |
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114 # When _chain()'ing copies in 'a' (from 'src' via some other commit 'mid') |
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115 # with copies in 'b' (from 'mid' to 'dst'), we can get the different cases |
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116 # in the following table (not including trivial cases). For example, case 2 |
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117 # is where a file existed in 'src' and remained under that name in 'mid' and |
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118 # then was renamed between 'mid' and 'dst'. |
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119 # |
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120 # case src mid dst result |
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121 # 1 x y - - |
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122 # 2 x y y x->y |
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123 # 3 x y x - |
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124 # 4 x y z x->z |
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125 # 5 - x y - |
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126 # 6 x x y x->y |
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127 # |
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128 # _chain() takes care of chaining the copies in 'a' and 'b', but it |
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129 # cannot tell the difference between cases 1 and 2, between 3 and 4, or |
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130 # between 5 and 6, so it includes all cases in its result. |
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131 # Cases 1, 3, and 5 are then removed by _filter(). |
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132 |
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133 for k, v in list(t.items()): |
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134 # remove copies from files that didn't exist |
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135 if v not in src: |
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136 del t[k] |
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137 # remove criss-crossed copies |
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138 elif k in src and v in dst: |
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139 del t[k] |
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140 # remove copies to files that were then removed |
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141 elif k not in dst: |
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142 del t[k] |
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143 |
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144 |
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145 def _chain(a, b): |
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146 """chain two sets of copies 'a' and 'b'""" |
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147 t = a.copy() |
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148 for k, v in pycompat.iteritems(b): |
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149 if v in t: |
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150 t[k] = t[v] |
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151 else: |
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152 t[k] = v |
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153 return t |
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154 |
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155 |
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156 def _tracefile(fctx, am, basemf, limit): |
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157 """return file context that is the ancestor of fctx present in ancestor |
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158 manifest am, stopping after the first ancestor lower than limit""" |
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159 |
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160 for f in fctx.ancestors(): |
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161 path = f.path() |
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162 if am.get(path, None) == f.filenode(): |
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163 return path |
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164 if basemf and basemf.get(path, None) == f.filenode(): |
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165 return path |
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166 if not f.isintroducedafter(limit): |
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167 return None |
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168 |
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169 |
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170 def _dirstatecopies(repo, match=None): |
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171 ds = repo.dirstate |
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172 c = ds.copies().copy() |
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173 for k in list(c): |
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174 if ds[k] not in b'anm' or (match and not match(k)): |
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175 del c[k] |
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176 return c |
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177 |
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178 |
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179 def _computeforwardmissing(a, b, match=None): |
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180 """Computes which files are in b but not a. |
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181 This is its own function so extensions can easily wrap this call to see what |
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182 files _forwardcopies is about to process. |
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183 """ |
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184 ma = a.manifest() |
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185 mb = b.manifest() |
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186 return mb.filesnotin(ma, match=match) |
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187 |
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188 |
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189 def usechangesetcentricalgo(repo): |
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190 """Checks if we should use changeset-centric copy algorithms""" |
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191 if repo.filecopiesmode == b'changeset-sidedata': |
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192 return True |
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193 readfrom = repo.ui.config(b'experimental', b'copies.read-from') |
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194 changesetsource = (b'changeset-only', b'compatibility') |
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195 return readfrom in changesetsource |
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196 |
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197 |
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198 def _committedforwardcopies(a, b, base, match): |
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199 """Like _forwardcopies(), but b.rev() cannot be None (working copy)""" |
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200 # files might have to be traced back to the fctx parent of the last |
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201 # one-side-only changeset, but not further back than that |
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202 repo = a._repo |
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203 |
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204 if usechangesetcentricalgo(repo): |
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205 return _changesetforwardcopies(a, b, match) |
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206 |
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207 debug = repo.ui.debugflag and repo.ui.configbool(b'devel', b'debug.copies') |
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208 dbg = repo.ui.debug |
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209 if debug: |
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210 dbg(b'debug.copies: looking into rename from %s to %s\n' % (a, b)) |
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211 limit = _findlimit(repo, a, b) |
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212 if debug: |
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213 dbg(b'debug.copies: search limit: %d\n' % limit) |
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214 am = a.manifest() |
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215 basemf = None if base is None else base.manifest() |
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216 |
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217 # find where new files came from |
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218 # we currently don't try to find where old files went, too expensive |
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219 # this means we can miss a case like 'hg rm b; hg cp a b' |
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220 cm = {} |
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221 |
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222 # Computing the forward missing is quite expensive on large manifests, since |
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223 # it compares the entire manifests. We can optimize it in the common use |
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224 # case of computing what copies are in a commit versus its parent (like |
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225 # during a rebase or histedit). Note, we exclude merge commits from this |
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226 # optimization, since the ctx.files() for a merge commit is not correct for |
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227 # this comparison. |
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228 forwardmissingmatch = match |
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229 if b.p1() == a and b.p2().node() == node.nullid: |
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230 filesmatcher = matchmod.exact(b.files()) |
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231 forwardmissingmatch = matchmod.intersectmatchers(match, filesmatcher) |
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232 missing = _computeforwardmissing(a, b, match=forwardmissingmatch) |
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233 |
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234 ancestrycontext = a._repo.changelog.ancestors([b.rev()], inclusive=True) |
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235 |
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236 if debug: |
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237 dbg(b'debug.copies: missing files to search: %d\n' % len(missing)) |
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238 |
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239 for f in sorted(missing): |
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240 if debug: |
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241 dbg(b'debug.copies: tracing file: %s\n' % f) |
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242 fctx = b[f] |
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243 fctx._ancestrycontext = ancestrycontext |
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244 |
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245 if debug: |
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246 start = util.timer() |
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247 opath = _tracefile(fctx, am, basemf, limit) |
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248 if opath: |
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249 if debug: |
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250 dbg(b'debug.copies: rename of: %s\n' % opath) |
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251 cm[f] = opath |
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252 if debug: |
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253 dbg( |
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254 b'debug.copies: time: %f seconds\n' |
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255 % (util.timer() - start) |
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256 ) |
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257 return cm |
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258 |
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259 |
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260 def _changesetforwardcopies(a, b, match): |
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261 if a.rev() in (node.nullrev, b.rev()): |
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262 return {} |
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263 |
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264 repo = a.repo() |
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265 children = {} |
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266 cl = repo.changelog |
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267 missingrevs = cl.findmissingrevs(common=[a.rev()], heads=[b.rev()]) |
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268 for r in missingrevs: |
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269 for p in cl.parentrevs(r): |
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270 if p == node.nullrev: |
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271 continue |
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272 if p not in children: |
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273 children[p] = [r] |
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274 else: |
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275 children[p].append(r) |
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276 |
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277 roots = set(children) - set(missingrevs) |
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278 # 'work' contains 3-tuples of a (revision number, parent number, copies). |
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279 # The parent number is only used for knowing which parent the copies dict |
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280 # came from. |
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281 # NOTE: To reduce costly copying the 'copies' dicts, we reuse the same |
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282 # instance for *one* of the child nodes (the last one). Once an instance |
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283 # has been put on the queue, it is thus no longer safe to modify it. |
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284 # Conversely, it *is* safe to modify an instance popped off the queue. |
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285 work = [(r, 1, {}) for r in roots] |
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286 heapq.heapify(work) |
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287 alwaysmatch = match.always() |
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288 while work: |
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289 r, i1, copies = heapq.heappop(work) |
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290 if work and work[0][0] == r: |
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291 # We are tracing copies from both parents |
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292 r, i2, copies2 = heapq.heappop(work) |
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293 for dst, src in copies2.items(): |
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294 # Unlike when copies are stored in the filelog, we consider |
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295 # it a copy even if the destination already existed on the |
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296 # other branch. It's simply too expensive to check if the |
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297 # file existed in the manifest. |
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298 if dst not in copies: |
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299 # If it was copied on the p1 side, leave it as copied from |
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300 # that side, even if it was also copied on the p2 side. |
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301 copies[dst] = copies2[dst] |
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302 if r == b.rev(): |
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303 return copies |
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304 for i, c in enumerate(children[r]): |
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305 childctx = repo[c] |
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306 if r == childctx.p1().rev(): |
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307 parent = 1 |
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308 childcopies = childctx.p1copies() |
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309 else: |
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310 assert r == childctx.p2().rev() |
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311 parent = 2 |
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312 childcopies = childctx.p2copies() |
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313 if not alwaysmatch: |
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314 childcopies = { |
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315 dst: src for dst, src in childcopies.items() if match(dst) |
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316 } |
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317 # Copy the dict only if later iterations will also need it |
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318 if i != len(children[r]) - 1: |
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319 newcopies = copies.copy() |
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320 else: |
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321 newcopies = copies |
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322 if childcopies: |
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323 newcopies = _chain(newcopies, childcopies) |
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324 for f in childctx.filesremoved(): |
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325 if f in newcopies: |
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326 del newcopies[f] |
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327 heapq.heappush(work, (c, parent, newcopies)) |
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328 assert False |
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329 |
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330 |
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331 def _forwardcopies(a, b, base=None, match=None): |
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332 """find {dst@b: src@a} copy mapping where a is an ancestor of b""" |
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333 |
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334 if base is None: |
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335 base = a |
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336 match = a.repo().narrowmatch(match) |
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337 # check for working copy |
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338 if b.rev() is None: |
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339 cm = _committedforwardcopies(a, b.p1(), base, match) |
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340 # combine copies from dirstate if necessary |
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341 copies = _chain(cm, _dirstatecopies(b._repo, match)) |
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342 else: |
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343 copies = _committedforwardcopies(a, b, base, match) |
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344 return copies |
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345 |
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346 |
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347 def _backwardrenames(a, b, match): |
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348 if a._repo.ui.config(b'experimental', b'copytrace') == b'off': |
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349 return {} |
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350 |
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351 # Even though we're not taking copies into account, 1:n rename situations |
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352 # can still exist (e.g. hg cp a b; hg mv a c). In those cases we |
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353 # arbitrarily pick one of the renames. |
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354 # We don't want to pass in "match" here, since that would filter |
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355 # the destination by it. Since we're reversing the copies, we want |
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356 # to filter the source instead. |
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357 f = _forwardcopies(b, a) |
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358 r = {} |
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359 for k, v in sorted(pycompat.iteritems(f)): |
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360 if match and not match(v): |
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361 continue |
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362 # remove copies |
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363 if v in a: |
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364 continue |
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365 r[v] = k |
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366 return r |
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367 |
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368 |
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369 def pathcopies(x, y, match=None): |
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370 """find {dst@y: src@x} copy mapping for directed compare""" |
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371 repo = x._repo |
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372 debug = repo.ui.debugflag and repo.ui.configbool(b'devel', b'debug.copies') |
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373 if debug: |
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374 repo.ui.debug( |
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375 b'debug.copies: searching copies from %s to %s\n' % (x, y) |
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376 ) |
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377 if x == y or not x or not y: |
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378 return {} |
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379 a = y.ancestor(x) |
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380 if a == x: |
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381 if debug: |
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382 repo.ui.debug(b'debug.copies: search mode: forward\n') |
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383 if y.rev() is None and x == y.p1(): |
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384 # short-circuit to avoid issues with merge states |
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385 return _dirstatecopies(repo, match) |
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386 copies = _forwardcopies(x, y, match=match) |
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387 elif a == y: |
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388 if debug: |
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389 repo.ui.debug(b'debug.copies: search mode: backward\n') |
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390 copies = _backwardrenames(x, y, match=match) |
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391 else: |
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392 if debug: |
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393 repo.ui.debug(b'debug.copies: search mode: combined\n') |
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394 base = None |
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395 if a.rev() != node.nullrev: |
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396 base = x |
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397 copies = _chain( |
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398 _backwardrenames(x, a, match=match), |
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399 _forwardcopies(a, y, base, match=match), |
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400 ) |
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401 _filter(x, y, copies) |
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402 return copies |
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403 |
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404 |
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405 def mergecopies(repo, c1, c2, base): |
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406 """ |
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407 Finds moves and copies between context c1 and c2 that are relevant for |
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408 merging. 'base' will be used as the merge base. |
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409 |
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410 Copytracing is used in commands like rebase, merge, unshelve, etc to merge |
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411 files that were moved/ copied in one merge parent and modified in another. |
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412 For example: |
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413 |
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414 o ---> 4 another commit |
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415 | |
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416 | o ---> 3 commit that modifies a.txt |
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417 | / |
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418 o / ---> 2 commit that moves a.txt to b.txt |
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419 |/ |
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420 o ---> 1 merge base |
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421 |
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422 If we try to rebase revision 3 on revision 4, since there is no a.txt in |
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423 revision 4, and if user have copytrace disabled, we prints the following |
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424 message: |
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425 |
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426 ```other changed <file> which local deleted``` |
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427 |
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428 Returns five dicts: "copy", "movewithdir", "diverge", "renamedelete" and |
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429 "dirmove". |
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430 |
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431 "copy" is a mapping from destination name -> source name, |
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432 where source is in c1 and destination is in c2 or vice-versa. |
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433 |
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434 "movewithdir" is a mapping from source name -> destination name, |
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435 where the file at source present in one context but not the other |
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436 needs to be moved to destination by the merge process, because the |
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437 other context moved the directory it is in. |
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438 |
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439 "diverge" is a mapping of source name -> list of destination names |
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440 for divergent renames. |
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441 |
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442 "renamedelete" is a mapping of source name -> list of destination |
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443 names for files deleted in c1 that were renamed in c2 or vice-versa. |
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444 |
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445 "dirmove" is a mapping of detected source dir -> destination dir renames. |
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446 This is needed for handling changes to new files previously grafted into |
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447 renamed directories. |
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448 |
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449 This function calls different copytracing algorithms based on config. |
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450 """ |
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451 # avoid silly behavior for update from empty dir |
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452 if not c1 or not c2 or c1 == c2: |
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453 return {}, {}, {}, {}, {} |
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454 |
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455 narrowmatch = c1.repo().narrowmatch() |
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456 |
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457 # avoid silly behavior for parent -> working dir |
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458 if c2.node() is None and c1.node() == repo.dirstate.p1(): |
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459 return _dirstatecopies(repo, narrowmatch), {}, {}, {}, {} |
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460 |
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461 copytracing = repo.ui.config(b'experimental', b'copytrace') |
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462 if stringutil.parsebool(copytracing) is False: |
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463 # stringutil.parsebool() returns None when it is unable to parse the |
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464 # value, so we should rely on making sure copytracing is on such cases |
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465 return {}, {}, {}, {}, {} |
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466 |
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467 if usechangesetcentricalgo(repo): |
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468 # The heuristics don't make sense when we need changeset-centric algos |
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469 return _fullcopytracing(repo, c1, c2, base) |
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470 |
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471 # Copy trace disabling is explicitly below the node == p1 logic above |
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472 # because the logic above is required for a simple copy to be kept across a |
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473 # rebase. |
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474 if copytracing == b'heuristics': |
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475 # Do full copytracing if only non-public revisions are involved as |
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476 # that will be fast enough and will also cover the copies which could |
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477 # be missed by heuristics |
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478 if _isfullcopytraceable(repo, c1, base): |
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479 return _fullcopytracing(repo, c1, c2, base) |
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480 return _heuristicscopytracing(repo, c1, c2, base) |
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481 else: |
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482 return _fullcopytracing(repo, c1, c2, base) |
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483 |
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484 |
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485 def _isfullcopytraceable(repo, c1, base): |
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486 """ Checks that if base, source and destination are all no-public branches, |
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487 if yes let's use the full copytrace algorithm for increased capabilities |
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488 since it will be fast enough. |
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489 |
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490 `experimental.copytrace.sourcecommitlimit` can be used to set a limit for |
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491 number of changesets from c1 to base such that if number of changesets are |
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492 more than the limit, full copytracing algorithm won't be used. |
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493 """ |
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494 if c1.rev() is None: |
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495 c1 = c1.p1() |
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496 if c1.mutable() and base.mutable(): |
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497 sourcecommitlimit = repo.ui.configint( |
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498 b'experimental', b'copytrace.sourcecommitlimit' |
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499 ) |
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500 commits = len(repo.revs(b'%d::%d', base.rev(), c1.rev())) |
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501 return commits < sourcecommitlimit |
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502 return False |
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503 |
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504 |
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505 def _checksinglesidecopies( |
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506 src, dsts1, m1, m2, mb, c2, base, copy, renamedelete |
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507 ): |
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508 if src not in m2: |
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509 # deleted on side 2 |
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510 if src not in m1: |
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511 # renamed on side 1, deleted on side 2 |
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512 renamedelete[src] = dsts1 |
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513 elif m2[src] != mb[src]: |
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514 if not _related(c2[src], base[src]): |
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515 return |
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516 # modified on side 2 |
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517 for dst in dsts1: |
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518 if dst not in m2: |
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519 # dst not added on side 2 (handle as regular |
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520 # "both created" case in manifestmerge otherwise) |
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521 copy[dst] = src |
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522 |
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523 |
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524 def _fullcopytracing(repo, c1, c2, base): |
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525 """ The full copytracing algorithm which finds all the new files that were |
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526 added from merge base up to the top commit and for each file it checks if |
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527 this file was copied from another file. |
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528 |
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529 This is pretty slow when a lot of changesets are involved but will track all |
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530 the copies. |
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531 """ |
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532 m1 = c1.manifest() |
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533 m2 = c2.manifest() |
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534 mb = base.manifest() |
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535 |
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536 copies1 = pathcopies(base, c1) |
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537 copies2 = pathcopies(base, c2) |
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538 |
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539 inversecopies1 = {} |
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540 inversecopies2 = {} |
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541 for dst, src in copies1.items(): |
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542 inversecopies1.setdefault(src, []).append(dst) |
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543 for dst, src in copies2.items(): |
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544 inversecopies2.setdefault(src, []).append(dst) |
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545 |
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546 copy = {} |
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547 diverge = {} |
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548 renamedelete = {} |
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549 allsources = set(inversecopies1) | set(inversecopies2) |
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550 for src in allsources: |
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551 dsts1 = inversecopies1.get(src) |
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552 dsts2 = inversecopies2.get(src) |
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553 if dsts1 and dsts2: |
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554 # copied/renamed on both sides |
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555 if src not in m1 and src not in m2: |
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556 # renamed on both sides |
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557 dsts1 = set(dsts1) |
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558 dsts2 = set(dsts2) |
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559 # If there's some overlap in the rename destinations, we |
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560 # consider it not divergent. For example, if side 1 copies 'a' |
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561 # to 'b' and 'c' and deletes 'a', and side 2 copies 'a' to 'c' |
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562 # and 'd' and deletes 'a'. |
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563 if dsts1 & dsts2: |
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564 for dst in dsts1 & dsts2: |
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565 copy[dst] = src |
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566 else: |
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567 diverge[src] = sorted(dsts1 | dsts2) |
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568 elif src in m1 and src in m2: |
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569 # copied on both sides |
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570 dsts1 = set(dsts1) |
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571 dsts2 = set(dsts2) |
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572 for dst in dsts1 & dsts2: |
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573 copy[dst] = src |
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574 # TODO: Handle cases where it was renamed on one side and copied |
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575 # on the other side |
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576 elif dsts1: |
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577 # copied/renamed only on side 1 |
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578 _checksinglesidecopies( |
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579 src, dsts1, m1, m2, mb, c2, base, copy, renamedelete |
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580 ) |
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581 elif dsts2: |
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582 # copied/renamed only on side 2 |
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583 _checksinglesidecopies( |
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584 src, dsts2, m2, m1, mb, c1, base, copy, renamedelete |
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585 ) |
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586 |
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587 renamedeleteset = set() |
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588 divergeset = set() |
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589 for dsts in diverge.values(): |
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590 divergeset.update(dsts) |
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591 for dsts in renamedelete.values(): |
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592 renamedeleteset.update(dsts) |
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593 |
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594 # find interesting file sets from manifests |
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595 addedinm1 = m1.filesnotin(mb, repo.narrowmatch()) |
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596 addedinm2 = m2.filesnotin(mb, repo.narrowmatch()) |
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597 u1 = sorted(addedinm1 - addedinm2) |
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598 u2 = sorted(addedinm2 - addedinm1) |
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599 |
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600 header = b" unmatched files in %s" |
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601 if u1: |
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602 repo.ui.debug(b"%s:\n %s\n" % (header % b'local', b"\n ".join(u1))) |
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603 if u2: |
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604 repo.ui.debug(b"%s:\n %s\n" % (header % b'other', b"\n ".join(u2))) |
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605 |
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606 fullcopy = copies1.copy() |
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607 fullcopy.update(copies2) |
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608 if not fullcopy: |
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609 return copy, {}, diverge, renamedelete, {} |
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610 |
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611 if repo.ui.debugflag: |
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612 repo.ui.debug( |
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613 b" all copies found (* = to merge, ! = divergent, " |
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614 b"% = renamed and deleted):\n" |
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615 ) |
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616 for f in sorted(fullcopy): |
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617 note = b"" |
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618 if f in copy: |
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619 note += b"*" |
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620 if f in divergeset: |
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621 note += b"!" |
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622 if f in renamedeleteset: |
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623 note += b"%" |
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624 repo.ui.debug( |
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625 b" src: '%s' -> dst: '%s' %s\n" % (fullcopy[f], f, note) |
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626 ) |
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627 del divergeset |
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628 |
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629 repo.ui.debug(b" checking for directory renames\n") |
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630 |
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631 # generate a directory move map |
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632 d1, d2 = c1.dirs(), c2.dirs() |
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633 invalid = set() |
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634 dirmove = {} |
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635 |
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636 # examine each file copy for a potential directory move, which is |
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637 # when all the files in a directory are moved to a new directory |
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638 for dst, src in pycompat.iteritems(fullcopy): |
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639 dsrc, ddst = pathutil.dirname(src), pathutil.dirname(dst) |
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640 if dsrc in invalid: |
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|
641 # already seen to be uninteresting |
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642 continue |
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643 elif dsrc in d1 and ddst in d1: |
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644 # directory wasn't entirely moved locally |
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645 invalid.add(dsrc) |
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646 elif dsrc in d2 and ddst in d2: |
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647 # directory wasn't entirely moved remotely |
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648 invalid.add(dsrc) |
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649 elif dsrc in dirmove and dirmove[dsrc] != ddst: |
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650 # files from the same directory moved to two different places |
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651 invalid.add(dsrc) |
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652 else: |
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653 # looks good so far |
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654 dirmove[dsrc] = ddst |
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655 |
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656 for i in invalid: |
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|
657 if i in dirmove: |
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658 del dirmove[i] |
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659 del d1, d2, invalid |
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660 |
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|
661 if not dirmove: |
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662 return copy, {}, diverge, renamedelete, {} |
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663 |
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664 dirmove = {k + b"/": v + b"/" for k, v in pycompat.iteritems(dirmove)} |
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665 |
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666 for d in dirmove: |
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667 repo.ui.debug( |
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668 b" discovered dir src: '%s' -> dst: '%s'\n" % (d, dirmove[d]) |
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669 ) |
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670 |
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671 movewithdir = {} |
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672 # check unaccounted nonoverlapping files against directory moves |
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673 for f in u1 + u2: |
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674 if f not in fullcopy: |
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675 for d in dirmove: |
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676 if f.startswith(d): |
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677 # new file added in a directory that was moved, move it |
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678 df = dirmove[d] + f[len(d) :] |
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679 if df not in copy: |
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680 movewithdir[f] = df |
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681 repo.ui.debug( |
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682 b" pending file src: '%s' -> dst: '%s'\n" |
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683 % (f, df) |
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684 ) |
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685 break |
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686 |
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687 return copy, movewithdir, diverge, renamedelete, dirmove |
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688 |
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689 |
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690 def _heuristicscopytracing(repo, c1, c2, base): |
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691 """ Fast copytracing using filename heuristics |
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692 |
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693 Assumes that moves or renames are of following two types: |
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694 |
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695 1) Inside a directory only (same directory name but different filenames) |
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696 2) Move from one directory to another |
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697 (same filenames but different directory names) |
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698 |
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699 Works only when there are no merge commits in the "source branch". |
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700 Source branch is commits from base up to c2 not including base. |
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701 |
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702 If merge is involved it fallbacks to _fullcopytracing(). |
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703 |
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704 Can be used by setting the following config: |
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705 |
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706 [experimental] |
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707 copytrace = heuristics |
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708 |
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709 In some cases the copy/move candidates found by heuristics can be very large |
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710 in number and that will make the algorithm slow. The number of possible |
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711 candidates to check can be limited by using the config |
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712 `experimental.copytrace.movecandidateslimit` which defaults to 100. |
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713 """ |
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714 |
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715 if c1.rev() is None: |
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716 c1 = c1.p1() |
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717 if c2.rev() is None: |
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718 c2 = c2.p1() |
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719 |
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720 copies = {} |
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721 |
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722 changedfiles = set() |
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723 m1 = c1.manifest() |
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724 if not repo.revs(b'%d::%d', base.rev(), c2.rev()): |
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725 # If base is not in c2 branch, we switch to fullcopytracing |
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726 repo.ui.debug( |
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727 b"switching to full copytracing as base is not " |
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728 b"an ancestor of c2\n" |
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729 ) |
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730 return _fullcopytracing(repo, c1, c2, base) |
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731 |
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732 ctx = c2 |
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733 while ctx != base: |
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734 if len(ctx.parents()) == 2: |
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735 # To keep things simple let's not handle merges |
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736 repo.ui.debug(b"switching to full copytracing because of merges\n") |
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737 return _fullcopytracing(repo, c1, c2, base) |
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738 changedfiles.update(ctx.files()) |
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739 ctx = ctx.p1() |
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740 |
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741 cp = _forwardcopies(base, c2) |
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742 for dst, src in pycompat.iteritems(cp): |
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743 if src in m1: |
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744 copies[dst] = src |
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745 |
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746 # file is missing if it isn't present in the destination, but is present in |
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747 # the base and present in the source. |
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748 # Presence in the base is important to exclude added files, presence in the |
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749 # source is important to exclude removed files. |
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750 filt = lambda f: f not in m1 and f in base and f in c2 |
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751 missingfiles = [f for f in changedfiles if filt(f)] |
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752 |
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753 if missingfiles: |
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754 basenametofilename = collections.defaultdict(list) |
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755 dirnametofilename = collections.defaultdict(list) |
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756 |
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757 for f in m1.filesnotin(base.manifest()): |
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758 basename = os.path.basename(f) |
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759 dirname = os.path.dirname(f) |
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760 basenametofilename[basename].append(f) |
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761 dirnametofilename[dirname].append(f) |
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762 |
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763 for f in missingfiles: |
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764 basename = os.path.basename(f) |
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765 dirname = os.path.dirname(f) |
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766 samebasename = basenametofilename[basename] |
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767 samedirname = dirnametofilename[dirname] |
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768 movecandidates = samebasename + samedirname |
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769 # f is guaranteed to be present in c2, that's why |
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770 # c2.filectx(f) won't fail |
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771 f2 = c2.filectx(f) |
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772 # we can have a lot of candidates which can slow down the heuristics |
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773 # config value to limit the number of candidates moves to check |
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774 maxcandidates = repo.ui.configint( |
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775 b'experimental', b'copytrace.movecandidateslimit' |
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776 ) |
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777 |
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778 if len(movecandidates) > maxcandidates: |
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779 repo.ui.status( |
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780 _( |
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781 b"skipping copytracing for '%s', more " |
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782 b"candidates than the limit: %d\n" |
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783 ) |
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784 % (f, len(movecandidates)) |
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785 ) |
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786 continue |
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787 |
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788 for candidate in movecandidates: |
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789 f1 = c1.filectx(candidate) |
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790 if _related(f1, f2): |
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791 # if there are a few related copies then we'll merge |
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792 # changes into all of them. This matches the behaviour |
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793 # of upstream copytracing |
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794 copies[candidate] = f |
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795 |
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796 return copies, {}, {}, {}, {} |
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797 |
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798 |
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799 def _related(f1, f2): |
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800 """return True if f1 and f2 filectx have a common ancestor |
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801 |
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802 Walk back to common ancestor to see if the two files originate |
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803 from the same file. Since workingfilectx's rev() is None it messes |
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804 up the integer comparison logic, hence the pre-step check for |
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805 None (f1 and f2 can only be workingfilectx's initially). |
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806 """ |
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807 |
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808 if f1 == f2: |
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809 return True # a match |
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810 |
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811 g1, g2 = f1.ancestors(), f2.ancestors() |
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812 try: |
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813 f1r, f2r = f1.linkrev(), f2.linkrev() |
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814 |
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815 if f1r is None: |
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816 f1 = next(g1) |
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817 if f2r is None: |
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818 f2 = next(g2) |
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819 |
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820 while True: |
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821 f1r, f2r = f1.linkrev(), f2.linkrev() |
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822 if f1r > f2r: |
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823 f1 = next(g1) |
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824 elif f2r > f1r: |
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825 f2 = next(g2) |
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826 else: # f1 and f2 point to files in the same linkrev |
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827 return f1 == f2 # true if they point to the same file |
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828 except StopIteration: |
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829 return False |
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830 |
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831 |
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832 def duplicatecopies(repo, wctx, rev, fromrev, skiprev=None): |
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833 """reproduce copies from fromrev to rev in the dirstate |
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834 |
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835 If skiprev is specified, it's a revision that should be used to |
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836 filter copy records. Any copies that occur between fromrev and |
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837 skiprev will not be duplicated, even if they appear in the set of |
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838 copies between fromrev and rev. |
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839 """ |
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840 exclude = {} |
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841 ctraceconfig = repo.ui.config(b'experimental', b'copytrace') |
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842 bctrace = stringutil.parsebool(ctraceconfig) |
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843 if skiprev is not None and ( |
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844 ctraceconfig == b'heuristics' or bctrace or bctrace is None |
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845 ): |
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846 # copytrace='off' skips this line, but not the entire function because |
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847 # the line below is O(size of the repo) during a rebase, while the rest |
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848 # of the function is much faster (and is required for carrying copy |
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849 # metadata across the rebase anyway). |
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850 exclude = pathcopies(repo[fromrev], repo[skiprev]) |
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851 for dst, src in pycompat.iteritems(pathcopies(repo[fromrev], repo[rev])): |
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852 if dst in exclude: |
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853 continue |
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854 if dst in wctx: |
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855 wctx[dst].markcopied(src) |
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856 |
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857 |
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858 def computechangesetcopies(ctx): |
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859 """return the copies data for a changeset |
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860 |
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861 The copies data are returned as a pair of dictionnary (p1copies, p2copies). |
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862 |
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863 Each dictionnary are in the form: `{newname: oldname}` |
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864 """ |
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865 p1copies = {} |
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866 p2copies = {} |
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867 p1 = ctx.p1() |
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868 p2 = ctx.p2() |
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869 narrowmatch = ctx._repo.narrowmatch() |
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870 for dst in ctx.files(): |
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871 if not narrowmatch(dst) or dst not in ctx: |
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872 continue |
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873 copied = ctx[dst].renamed() |
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874 if not copied: |
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875 continue |
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876 src, srcnode = copied |
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|
877 if src in p1 and p1[src].filenode() == srcnode: |
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878 p1copies[dst] = src |
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879 elif src in p2 and p2[src].filenode() == srcnode: |
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880 p2copies[dst] = src |
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|
881 return p1copies, p2copies |