Mercurial > hg
annotate mercurial/copies.py @ 42514:e7c55e24d6bf
copies: avoid reusing the same variable for two different copy dicts
"childcopies" is initally the copies the current changeset to one of
its children and then we reassign it with the copies from the start of
the chain to the child. Let's use different names for these two
things.
Differential Revision: https://phab.mercurial-scm.org/D6564
author | Martin von Zweigbergk <martinvonz@google.com> |
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date | Wed, 19 Jun 2019 23:14:10 -0700 |
parents | c0b51449bf6b |
children | 8f9cfc8d2ae1 |
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 util, |
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21 ) |
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22 from .utils import ( |
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23 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 def _chainandfilter(src, dst, a, b): |
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111 """chain two sets of copies 'a' and 'b' and filter result""" |
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112 |
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113 # When chaining copies in 'a' (from 'src' via some other commit 'mid') with |
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114 # copies in 'b' (from 'mid' to 'dst'), we can get the different cases in the |
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115 # following table (not including trivial cases). For example, case 2 is |
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116 # where a file existed in 'src' and remained under that name in 'mid' and |
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117 # then was renamed between 'mid' and 'dst'. |
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118 # |
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119 # case src mid dst result |
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120 # 1 x y - - |
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121 # 2 x y y x->y |
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122 # 3 x y x - |
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123 # 4 x y z x->z |
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124 # 5 - x y - |
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125 # 6 x x y x->y |
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126 # |
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127 # _chain() takes care of chaining the copies in 'a' and 'b', but it |
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128 # cannot tell the difference between cases 1 and 2, between 3 and 4, or |
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129 # between 5 and 6, so it includes all cases in its result. |
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130 # Cases 1, 3, and 5 are then removed by _filter(). |
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131 |
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132 t = _chain(a, b) |
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133 _filter(src, dst, t) |
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134 return t |
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135 |
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136 def _filter(src, dst, t): |
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137 """filters out invalid copies after chaining""" |
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138 for k, v in list(t.items()): |
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139 # remove copies from files that didn't exist |
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140 if v not in src: |
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141 del t[k] |
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142 # remove criss-crossed copies |
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143 elif k in src and v in dst: |
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144 del t[k] |
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145 # remove copies to files that were then removed |
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146 elif k not in dst: |
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147 del t[k] |
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148 |
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149 def _chain(a, b): |
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150 """chain two sets of copies 'a' and 'b'""" |
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151 t = a.copy() |
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152 for k, v in b.iteritems(): |
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153 if v in t: |
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154 t[k] = t[v] |
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155 else: |
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156 t[k] = v |
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157 return t |
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158 |
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159 def _tracefile(fctx, am, limit): |
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160 """return file context that is the ancestor of fctx present in ancestor |
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161 manifest am, stopping after the first ancestor lower than limit""" |
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162 |
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163 for f in fctx.ancestors(): |
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164 if am.get(f.path(), None) == f.filenode(): |
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165 return f |
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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 def _dirstatecopies(repo, match=None): |
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170 ds = repo.dirstate |
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171 c = ds.copies().copy() |
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172 for k in list(c): |
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173 if ds[k] not in 'anm' or (match and not match(k)): |
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174 del c[k] |
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175 return c |
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176 |
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177 def _computeforwardmissing(a, b, match=None): |
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178 """Computes which files are in b but not a. |
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179 This is its own function so extensions can easily wrap this call to see what |
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180 files _forwardcopies is about to process. |
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181 """ |
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182 ma = a.manifest() |
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183 mb = b.manifest() |
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184 return mb.filesnotin(ma, match=match) |
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185 |
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186 def usechangesetcentricalgo(repo): |
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187 """Checks if we should use changeset-centric copy algorithms""" |
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188 return (repo.ui.config('experimental', 'copies.read-from') in |
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189 ('changeset-only', 'compatibility')) |
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190 |
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191 def _committedforwardcopies(a, b, match): |
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192 """Like _forwardcopies(), but b.rev() cannot be None (working copy)""" |
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193 # files might have to be traced back to the fctx parent of the last |
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194 # one-side-only changeset, but not further back than that |
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195 repo = a._repo |
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196 |
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197 if usechangesetcentricalgo(repo): |
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198 return _changesetforwardcopies(a, b, match) |
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199 |
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200 debug = repo.ui.debugflag and repo.ui.configbool('devel', 'debug.copies') |
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201 dbg = repo.ui.debug |
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202 if debug: |
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203 dbg('debug.copies: looking into rename from %s to %s\n' |
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204 % (a, b)) |
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205 limit = _findlimit(repo, a, b) |
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206 if debug: |
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207 dbg('debug.copies: search limit: %d\n' % limit) |
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208 am = a.manifest() |
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209 |
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210 # find where new files came from |
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211 # we currently don't try to find where old files went, too expensive |
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212 # this means we can miss a case like 'hg rm b; hg cp a b' |
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213 cm = {} |
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214 |
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215 # Computing the forward missing is quite expensive on large manifests, since |
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216 # it compares the entire manifests. We can optimize it in the common use |
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217 # case of computing what copies are in a commit versus its parent (like |
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218 # during a rebase or histedit). Note, we exclude merge commits from this |
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219 # optimization, since the ctx.files() for a merge commit is not correct for |
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220 # this comparison. |
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221 forwardmissingmatch = match |
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222 if b.p1() == a and b.p2().node() == node.nullid: |
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223 filesmatcher = matchmod.exact(b.files()) |
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224 forwardmissingmatch = matchmod.intersectmatchers(match, filesmatcher) |
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225 missing = _computeforwardmissing(a, b, match=forwardmissingmatch) |
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226 |
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227 ancestrycontext = a._repo.changelog.ancestors([b.rev()], inclusive=True) |
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228 |
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229 if debug: |
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230 dbg('debug.copies: missing files to search: %d\n' % len(missing)) |
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231 |
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232 for f in sorted(missing): |
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233 if debug: |
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234 dbg('debug.copies: tracing file: %s\n' % f) |
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235 fctx = b[f] |
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236 fctx._ancestrycontext = ancestrycontext |
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237 |
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238 if debug: |
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239 start = util.timer() |
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240 ofctx = _tracefile(fctx, am, limit) |
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241 if ofctx: |
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242 if debug: |
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243 dbg('debug.copies: rename of: %s\n' % ofctx._path) |
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244 cm[f] = ofctx.path() |
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245 if debug: |
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246 dbg('debug.copies: time: %f seconds\n' |
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247 % (util.timer() - start)) |
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248 return cm |
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249 |
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250 def _changesetforwardcopies(a, b, match): |
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251 if a.rev() == node.nullrev: |
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252 return {} |
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253 |
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254 repo = a.repo() |
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255 children = {} |
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256 cl = repo.changelog |
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257 missingrevs = cl.findmissingrevs(common=[a.rev()], heads=[b.rev()]) |
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258 for r in missingrevs: |
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259 for p in cl.parentrevs(r): |
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260 if p == node.nullrev: |
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261 continue |
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262 if p not in children: |
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263 children[p] = [r] |
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264 else: |
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265 children[p].append(r) |
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266 |
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267 roots = set(children) - set(missingrevs) |
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268 # 'work' contains 3-tuples of a (revision number, parent number, copies). |
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269 # The parent number is only used for knowing which parent the copies dict |
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270 # came from. |
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271 work = [(r, 1, {}) for r in roots] |
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272 heapq.heapify(work) |
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273 alwaysmatch = match.always() |
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274 while work: |
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275 r, i1, copies1 = heapq.heappop(work) |
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276 if work and work[0][0] == r: |
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277 # We are tracing copies from both parents |
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278 r, i2, copies2 = heapq.heappop(work) |
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279 copies = {} |
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280 allcopies = set(copies1) | set(copies2) |
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281 # TODO: perhaps this filtering should be done as long as ctx |
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282 # is merge, whether or not we're tracing from both parent. |
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283 for dst in allcopies: |
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284 if not alwaysmatch and not match(dst): |
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285 continue |
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286 # Unlike when copies are stored in the filelog, we consider |
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287 # it a copy even if the destination already existed on the |
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288 # other branch. It's simply too expensive to check if the |
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289 # file existed in the manifest. |
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290 if dst in copies1: |
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291 # If it was copied on the p1 side, mark it as copied from |
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292 # that side, even if it was also copied on the p2 side. |
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293 copies[dst] = copies1[dst] |
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294 else: |
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295 copies[dst] = copies2[dst] |
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296 else: |
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297 copies = copies1 |
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298 if r == b.rev(): |
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299 _filter(a, b, copies) |
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300 return copies |
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301 for i, c in enumerate(children[r]): |
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302 childctx = repo[c] |
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303 if r == childctx.p1().rev(): |
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304 parent = 1 |
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305 childcopies = childctx.p1copies() |
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306 else: |
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307 assert r == childctx.p2().rev() |
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308 parent = 2 |
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309 childcopies = childctx.p2copies() |
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310 if not alwaysmatch: |
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311 childcopies = {dst: src for dst, src in childcopies.items() |
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312 if match(dst)} |
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313 # Copy the dict only if later iterations will also need it |
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314 if i != len(children[r]) - 1: |
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315 newcopies = copies.copy() |
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316 else: |
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317 newcopies = copies |
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318 if childcopies: |
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319 newcopies = _chain(newcopies, childcopies) |
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320 for f in childctx.filesremoved(): |
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321 if f in newcopies: |
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322 del newcopies[f] |
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323 heapq.heappush(work, (c, parent, newcopies)) |
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324 assert False |
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325 |
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326 def _forwardcopies(a, b, match=None): |
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327 """find {dst@b: src@a} copy mapping where a is an ancestor of b""" |
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328 |
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329 match = a.repo().narrowmatch(match) |
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330 # check for working copy |
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331 if b.rev() is None: |
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332 if a == b.p1(): |
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333 # short-circuit to avoid issues with merge states |
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334 return _dirstatecopies(b._repo, match) |
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335 |
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336 cm = _committedforwardcopies(a, b.p1(), match) |
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337 # combine copies from dirstate if necessary |
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338 return _chainandfilter(a, b, cm, _dirstatecopies(b._repo, match)) |
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339 return _committedforwardcopies(a, b, match) |
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340 |
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341 def _backwardrenames(a, b, match): |
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342 if a._repo.ui.config('experimental', 'copytrace') == 'off': |
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343 return {} |
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344 |
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345 # Even though we're not taking copies into account, 1:n rename situations |
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346 # can still exist (e.g. hg cp a b; hg mv a c). In those cases we |
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347 # arbitrarily pick one of the renames. |
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348 # We don't want to pass in "match" here, since that would filter |
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349 # the destination by it. Since we're reversing the copies, we want |
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350 # to filter the source instead. |
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351 f = _forwardcopies(b, a) |
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352 r = {} |
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353 for k, v in sorted(f.iteritems()): |
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354 if match and not match(v): |
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355 continue |
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356 # remove copies |
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357 if v in a: |
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358 continue |
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359 r[v] = k |
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360 return r |
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361 |
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362 def pathcopies(x, y, match=None): |
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363 """find {dst@y: src@x} copy mapping for directed compare""" |
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364 repo = x._repo |
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365 debug = repo.ui.debugflag and repo.ui.configbool('devel', 'debug.copies') |
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366 if debug: |
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367 repo.ui.debug('debug.copies: searching copies from %s to %s\n' |
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368 % (x, y)) |
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369 if x == y or not x or not y: |
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370 return {} |
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371 a = y.ancestor(x) |
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372 if a == x: |
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373 if debug: |
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374 repo.ui.debug('debug.copies: search mode: forward\n') |
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375 return _forwardcopies(x, y, match=match) |
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376 if a == y: |
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377 if debug: |
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378 repo.ui.debug('debug.copies: search mode: backward\n') |
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379 return _backwardrenames(x, y, match=match) |
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380 if debug: |
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381 repo.ui.debug('debug.copies: search mode: combined\n') |
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382 return _chainandfilter(x, y, _backwardrenames(x, a, match=match), |
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383 _forwardcopies(a, y, match=match)) |
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384 |
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385 def mergecopies(repo, c1, c2, base): |
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386 """ |
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387 Finds moves and copies between context c1 and c2 that are relevant for |
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388 merging. 'base' will be used as the merge base. |
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389 |
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390 Copytracing is used in commands like rebase, merge, unshelve, etc to merge |
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391 files that were moved/ copied in one merge parent and modified in another. |
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392 For example: |
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393 |
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394 o ---> 4 another commit |
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395 | |
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396 | o ---> 3 commit that modifies a.txt |
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397 | / |
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398 o / ---> 2 commit that moves a.txt to b.txt |
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399 |/ |
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400 o ---> 1 merge base |
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401 |
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402 If we try to rebase revision 3 on revision 4, since there is no a.txt in |
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403 revision 4, and if user have copytrace disabled, we prints the following |
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404 message: |
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405 |
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406 ```other changed <file> which local deleted``` |
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407 |
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408 Returns five dicts: "copy", "movewithdir", "diverge", "renamedelete" and |
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409 "dirmove". |
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410 |
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411 "copy" is a mapping from destination name -> source name, |
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412 where source is in c1 and destination is in c2 or vice-versa. |
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413 |
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414 "movewithdir" is a mapping from source name -> destination name, |
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415 where the file at source present in one context but not the other |
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416 needs to be moved to destination by the merge process, because the |
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417 other context moved the directory it is in. |
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418 |
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419 "diverge" is a mapping of source name -> list of destination names |
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420 for divergent renames. |
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421 |
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422 "renamedelete" is a mapping of source name -> list of destination |
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423 names for files deleted in c1 that were renamed in c2 or vice-versa. |
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424 |
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425 "dirmove" is a mapping of detected source dir -> destination dir renames. |
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426 This is needed for handling changes to new files previously grafted into |
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427 renamed directories. |
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428 |
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429 This function calls different copytracing algorithms based on config. |
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430 """ |
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431 # avoid silly behavior for update from empty dir |
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432 if not c1 or not c2 or c1 == c2: |
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433 return {}, {}, {}, {}, {} |
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434 |
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435 narrowmatch = c1.repo().narrowmatch() |
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436 |
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437 # avoid silly behavior for parent -> working dir |
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438 if c2.node() is None and c1.node() == repo.dirstate.p1(): |
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439 return _dirstatecopies(repo, narrowmatch), {}, {}, {}, {} |
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440 |
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441 copytracing = repo.ui.config('experimental', 'copytrace') |
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442 if stringutil.parsebool(copytracing) is False: |
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443 # stringutil.parsebool() returns None when it is unable to parse the |
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444 # value, so we should rely on making sure copytracing is on such cases |
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445 return {}, {}, {}, {}, {} |
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446 |
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447 if usechangesetcentricalgo(repo): |
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448 # The heuristics don't make sense when we need changeset-centric algos |
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449 return _fullcopytracing(repo, c1, c2, base) |
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450 |
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451 # Copy trace disabling is explicitly below the node == p1 logic above |
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452 # because the logic above is required for a simple copy to be kept across a |
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453 # rebase. |
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454 if copytracing == 'heuristics': |
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455 # Do full copytracing if only non-public revisions are involved as |
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456 # that will be fast enough and will also cover the copies which could |
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457 # be missed by heuristics |
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458 if _isfullcopytraceable(repo, c1, base): |
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459 return _fullcopytracing(repo, c1, c2, base) |
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460 return _heuristicscopytracing(repo, c1, c2, base) |
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461 else: |
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462 return _fullcopytracing(repo, c1, c2, base) |
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463 |
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464 def _isfullcopytraceable(repo, c1, base): |
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465 """ Checks that if base, source and destination are all no-public branches, |
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466 if yes let's use the full copytrace algorithm for increased capabilities |
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467 since it will be fast enough. |
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468 |
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469 `experimental.copytrace.sourcecommitlimit` can be used to set a limit for |
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470 number of changesets from c1 to base such that if number of changesets are |
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471 more than the limit, full copytracing algorithm won't be used. |
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472 """ |
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473 if c1.rev() is None: |
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474 c1 = c1.p1() |
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475 if c1.mutable() and base.mutable(): |
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476 sourcecommitlimit = repo.ui.configint('experimental', |
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477 'copytrace.sourcecommitlimit') |
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478 commits = len(repo.revs('%d::%d', base.rev(), c1.rev())) |
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479 return commits < sourcecommitlimit |
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480 return False |
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481 |
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482 def _checksinglesidecopies(src, dsts1, m1, m2, mb, c2, base, |
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483 copy, renamedelete): |
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484 if src not in m2: |
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485 # deleted on side 2 |
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486 if src not in m1: |
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487 # renamed on side 1, deleted on side 2 |
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488 renamedelete[src] = dsts1 |
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489 elif m2[src] != mb[src]: |
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490 if not _related(c2[src], base[src]): |
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491 return |
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492 # modified on side 2 |
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493 for dst in dsts1: |
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494 if dst not in m2: |
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495 # dst not added on side 2 (handle as regular |
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496 # "both created" case in manifestmerge otherwise) |
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497 copy[dst] = src |
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498 |
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499 def _fullcopytracing(repo, c1, c2, base): |
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500 """ The full copytracing algorithm which finds all the new files that were |
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501 added from merge base up to the top commit and for each file it checks if |
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502 this file was copied from another file. |
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503 |
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504 This is pretty slow when a lot of changesets are involved but will track all |
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505 the copies. |
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|
506 """ |
6274
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507 m1 = c1.manifest() |
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508 m2 = c2.manifest() |
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509 mb = base.manifest() |
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510 |
42222
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511 copies1 = pathcopies(base, c1) |
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512 copies2 = pathcopies(base, c2) |
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513 |
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514 inversecopies1 = {} |
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515 inversecopies2 = {} |
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516 for dst, src in copies1.items(): |
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517 inversecopies1.setdefault(src, []).append(dst) |
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518 for dst, src in copies2.items(): |
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519 inversecopies2.setdefault(src, []).append(dst) |
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520 |
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521 copy = {} |
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522 diverge = {} |
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523 renamedelete = {} |
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524 allsources = set(inversecopies1) | set(inversecopies2) |
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525 for src in allsources: |
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526 dsts1 = inversecopies1.get(src) |
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527 dsts2 = inversecopies2.get(src) |
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528 if dsts1 and dsts2: |
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529 # copied/renamed on both sides |
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530 if src not in m1 and src not in m2: |
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531 # renamed on both sides |
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532 dsts1 = set(dsts1) |
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533 dsts2 = set(dsts2) |
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534 # If there's some overlap in the rename destinations, we |
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535 # consider it not divergent. For example, if side 1 copies 'a' |
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536 # to 'b' and 'c' and deletes 'a', and side 2 copies 'a' to 'c' |
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537 # and 'd' and deletes 'a'. |
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538 if dsts1 & dsts2: |
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539 for dst in (dsts1 & dsts2): |
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540 copy[dst] = src |
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541 else: |
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542 diverge[src] = sorted(dsts1 | dsts2) |
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543 elif src in m1 and src in m2: |
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544 # copied on both sides |
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545 dsts1 = set(dsts1) |
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546 dsts2 = set(dsts2) |
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547 for dst in (dsts1 & dsts2): |
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548 copy[dst] = src |
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549 # TODO: Handle cases where it was renamed on one side and copied |
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550 # on the other side |
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551 elif dsts1: |
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552 # copied/renamed only on side 1 |
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553 _checksinglesidecopies(src, dsts1, m1, m2, mb, c2, base, |
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554 copy, renamedelete) |
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555 elif dsts2: |
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556 # copied/renamed only on side 2 |
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557 _checksinglesidecopies(src, dsts2, m2, m1, mb, c1, base, |
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558 copy, renamedelete) |
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559 |
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560 renamedeleteset = set() |
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561 divergeset = set() |
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562 for dsts in diverge.values(): |
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563 divergeset.update(dsts) |
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564 for dsts in renamedelete.values(): |
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565 renamedeleteset.update(dsts) |
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566 |
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567 # find interesting file sets from manifests |
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568 addedinm1 = m1.filesnotin(mb, repo.narrowmatch()) |
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569 addedinm2 = m2.filesnotin(mb, repo.narrowmatch()) |
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570 u1 = sorted(addedinm1 - addedinm2) |
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571 u2 = sorted(addedinm2 - addedinm1) |
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572 |
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573 header = " unmatched files in %s" |
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574 if u1: |
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575 repo.ui.debug("%s:\n %s\n" % (header % 'local', "\n ".join(u1))) |
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576 if u2: |
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577 repo.ui.debug("%s:\n %s\n" % (header % 'other', "\n ".join(u2))) |
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578 |
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579 fullcopy = copies1.copy() |
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580 fullcopy.update(copies2) |
42166
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581 if not fullcopy: |
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582 return copy, {}, diverge, renamedelete, {} |
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583 |
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584 if repo.ui.debugflag: |
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585 repo.ui.debug(" all copies found (* = to merge, ! = divergent, " |
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586 "% = renamed and deleted):\n") |
18362
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587 for f in sorted(fullcopy): |
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588 note = "" |
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589 if f in copy: |
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590 note += "*" |
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591 if f in divergeset: |
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592 note += "!" |
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593 if f in renamedeleteset: |
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594 note += "%" |
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595 repo.ui.debug(" src: '%s' -> dst: '%s' %s\n" % (fullcopy[f], f, |
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596 note)) |
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597 del divergeset |
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598 |
9467
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do not attempt to translate ui.debug output
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parents:
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599 repo.ui.debug(" checking for directory renames\n") |
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600 |
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601 # generate a directory move map |
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602 d1, d2 = c1.dirs(), c2.dirs() |
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603 invalid = set() |
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604 dirmove = {} |
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605 |
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606 # examine each file copy for a potential directory move, which is |
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607 # when all the files in a directory are moved to a new directory |
7622
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608 for dst, src in fullcopy.iteritems(): |
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609 dsrc, ddst = pathutil.dirname(src), pathutil.dirname(dst) |
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610 if dsrc in invalid: |
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611 # already seen to be uninteresting |
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612 continue |
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613 elif dsrc in d1 and ddst in d1: |
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614 # directory wasn't entirely moved locally |
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|
615 invalid.add(dsrc) |
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616 elif dsrc in d2 and ddst in d2: |
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617 # directory wasn't entirely moved remotely |
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618 invalid.add(dsrc) |
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619 elif dsrc in dirmove and dirmove[dsrc] != ddst: |
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620 # files from the same directory moved to two different places |
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|
621 invalid.add(dsrc) |
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622 else: |
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623 # looks good so far |
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624 dirmove[dsrc] = ddst |
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|
625 |
f3f383efbeae
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changeset
|
626 for i in invalid: |
f3f383efbeae
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diff
changeset
|
627 if i in dirmove: |
f3f383efbeae
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diff
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|
628 del dirmove[i] |
f3f383efbeae
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diff
changeset
|
629 del d1, d2, invalid |
f3f383efbeae
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changeset
|
630 |
f3f383efbeae
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diff
changeset
|
631 if not dirmove: |
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|
632 return copy, {}, diverge, renamedelete, {} |
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|
633 |
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|
634 dirmove = {k + "/": v + "/" for k, v in dirmove.iteritems()} |
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635 |
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|
636 for d in dirmove: |
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|
637 repo.ui.debug(" discovered dir src: '%s' -> dst: '%s'\n" % |
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changeset
|
638 (d, dirmove[d])) |
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diff
changeset
|
639 |
30183
0106f93ca1d5
checkcopies: move 'movewithdir' initialisation right before its usage
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents:
30138
diff
changeset
|
640 movewithdir = {} |
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|
641 # check unaccounted nonoverlapping files against directory moves |
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642 for f in u1 + u2: |
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changeset
|
643 if f not in fullcopy: |
f3f383efbeae
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diff
changeset
|
644 for d in dirmove: |
f3f383efbeae
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diff
changeset
|
645 if f.startswith(d): |
f3f383efbeae
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parents:
diff
changeset
|
646 # new file added in a directory that was moved, move it |
6425
2d9328a2f81f
copies: skip directory rename checks when not merging
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parents:
6424
diff
changeset
|
647 df = dirmove[d] + f[len(d):] |
6426
e2c49ef2dd6e
copies: don't double-detect items in the directory copy check
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parents:
6425
diff
changeset
|
648 if df not in copy: |
18134
6c35b53cd28b
copies: separate moves via directory renames from explicit copies
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parents:
17055
diff
changeset
|
649 movewithdir[f] = df |
18135
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changeset
|
650 repo.ui.debug((" pending file src: '%s' -> " |
a6fe1b9cc68f
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changeset
|
651 "dst: '%s'\n") % (f, df)) |
6274
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parents:
diff
changeset
|
652 break |
f3f383efbeae
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
653 |
30581
43a9e02a7b7f
graft: support grafting changes to new file in renamed directory (issue5436)
Gábor Stefanik <gabor.stefanik@nng.com>
parents:
30361
diff
changeset
|
654 return copy, movewithdir, diverge, renamedelete, dirmove |
19178
4327687ca757
copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents:
18899
diff
changeset
|
655 |
34179
036d47d7cf39
copytrace: move fast heuristic copytracing algorithm to core
Pulkit Goyal <7895pulkit@gmail.com>
parents:
34078
diff
changeset
|
656 def _heuristicscopytracing(repo, c1, c2, base): |
036d47d7cf39
copytrace: move fast heuristic copytracing algorithm to core
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parents:
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diff
changeset
|
657 """ Fast copytracing using filename heuristics |
036d47d7cf39
copytrace: move fast heuristic copytracing algorithm to core
Pulkit Goyal <7895pulkit@gmail.com>
parents:
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diff
changeset
|
658 |
036d47d7cf39
copytrace: move fast heuristic copytracing algorithm to core
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parents:
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diff
changeset
|
659 Assumes that moves or renames are of following two types: |
036d47d7cf39
copytrace: move fast heuristic copytracing algorithm to core
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parents:
34078
diff
changeset
|
660 |
036d47d7cf39
copytrace: move fast heuristic copytracing algorithm to core
Pulkit Goyal <7895pulkit@gmail.com>
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34078
diff
changeset
|
661 1) Inside a directory only (same directory name but different filenames) |
036d47d7cf39
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diff
changeset
|
662 2) Move from one directory to another |
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663 (same filenames but different directory names) |
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664 |
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665 Works only when there are no merge commits in the "source branch". |
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666 Source branch is commits from base up to c2 not including base. |
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667 |
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668 If merge is involved it fallbacks to _fullcopytracing(). |
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669 |
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670 Can be used by setting the following config: |
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671 |
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672 [experimental] |
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673 copytrace = heuristics |
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674 |
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675 In some cases the copy/move candidates found by heuristics can be very large |
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676 in number and that will make the algorithm slow. The number of possible |
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677 candidates to check can be limited by using the config |
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678 `experimental.copytrace.movecandidateslimit` which defaults to 100. |
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679 """ |
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680 |
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681 if c1.rev() is None: |
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682 c1 = c1.p1() |
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683 if c2.rev() is None: |
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684 c2 = c2.p1() |
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685 |
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686 copies = {} |
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687 |
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688 changedfiles = set() |
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689 m1 = c1.manifest() |
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690 if not repo.revs('%d::%d', base.rev(), c2.rev()): |
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691 # If base is not in c2 branch, we switch to fullcopytracing |
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692 repo.ui.debug("switching to full copytracing as base is not " |
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693 "an ancestor of c2\n") |
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694 return _fullcopytracing(repo, c1, c2, base) |
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695 |
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696 ctx = c2 |
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697 while ctx != base: |
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698 if len(ctx.parents()) == 2: |
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699 # To keep things simple let's not handle merges |
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700 repo.ui.debug("switching to full copytracing because of merges\n") |
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701 return _fullcopytracing(repo, c1, c2, base) |
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702 changedfiles.update(ctx.files()) |
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703 ctx = ctx.p1() |
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704 |
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705 cp = _forwardcopies(base, c2) |
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706 for dst, src in cp.iteritems(): |
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707 if src in m1: |
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708 copies[dst] = src |
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709 |
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710 # file is missing if it isn't present in the destination, but is present in |
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711 # the base and present in the source. |
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712 # Presence in the base is important to exclude added files, presence in the |
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713 # source is important to exclude removed files. |
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714 filt = lambda f: f not in m1 and f in base and f in c2 |
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715 missingfiles = [f for f in changedfiles if filt(f)] |
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716 |
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717 if missingfiles: |
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718 basenametofilename = collections.defaultdict(list) |
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719 dirnametofilename = collections.defaultdict(list) |
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720 |
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721 for f in m1.filesnotin(base.manifest()): |
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722 basename = os.path.basename(f) |
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723 dirname = os.path.dirname(f) |
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724 basenametofilename[basename].append(f) |
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725 dirnametofilename[dirname].append(f) |
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726 |
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727 for f in missingfiles: |
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728 basename = os.path.basename(f) |
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729 dirname = os.path.dirname(f) |
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730 samebasename = basenametofilename[basename] |
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731 samedirname = dirnametofilename[dirname] |
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732 movecandidates = samebasename + samedirname |
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733 # f is guaranteed to be present in c2, that's why |
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734 # c2.filectx(f) won't fail |
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735 f2 = c2.filectx(f) |
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736 # we can have a lot of candidates which can slow down the heuristics |
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737 # config value to limit the number of candidates moves to check |
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738 maxcandidates = repo.ui.configint('experimental', |
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739 'copytrace.movecandidateslimit') |
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740 |
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741 if len(movecandidates) > maxcandidates: |
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742 repo.ui.status(_("skipping copytracing for '%s', more " |
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743 "candidates than the limit: %d\n") |
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744 % (f, len(movecandidates))) |
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745 continue |
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746 |
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747 for candidate in movecandidates: |
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748 f1 = c1.filectx(candidate) |
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749 if _related(f1, f2): |
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750 # if there are a few related copies then we'll merge |
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751 # changes into all of them. This matches the behaviour |
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752 # of upstream copytracing |
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753 copies[candidate] = f |
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754 |
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755 return copies, {}, {}, {}, {} |
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756 |
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757 def _related(f1, f2): |
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758 """return True if f1 and f2 filectx have a common ancestor |
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759 |
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760 Walk back to common ancestor to see if the two files originate |
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761 from the same file. Since workingfilectx's rev() is None it messes |
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762 up the integer comparison logic, hence the pre-step check for |
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763 None (f1 and f2 can only be workingfilectx's initially). |
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764 """ |
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765 |
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766 if f1 == f2: |
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767 return True # a match |
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768 |
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769 g1, g2 = f1.ancestors(), f2.ancestors() |
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770 try: |
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771 f1r, f2r = f1.linkrev(), f2.linkrev() |
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772 |
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773 if f1r is None: |
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774 f1 = next(g1) |
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775 if f2r is None: |
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776 f2 = next(g2) |
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777 |
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778 while True: |
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779 f1r, f2r = f1.linkrev(), f2.linkrev() |
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780 if f1r > f2r: |
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781 f1 = next(g1) |
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782 elif f2r > f1r: |
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783 f2 = next(g2) |
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784 else: # f1 and f2 point to files in the same linkrev |
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785 return f1 == f2 # true if they point to the same file |
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786 except StopIteration: |
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787 return False |
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788 |
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789 def duplicatecopies(repo, wctx, rev, fromrev, skiprev=None): |
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790 """reproduce copies from fromrev to rev in the dirstate |
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791 |
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792 If skiprev is specified, it's a revision that should be used to |
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793 filter copy records. Any copies that occur between fromrev and |
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794 skiprev will not be duplicated, even if they appear in the set of |
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795 copies between fromrev and rev. |
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796 """ |
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797 exclude = {} |
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798 ctraceconfig = repo.ui.config('experimental', 'copytrace') |
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799 bctrace = stringutil.parsebool(ctraceconfig) |
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800 if (skiprev is not None and |
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801 (ctraceconfig == 'heuristics' or bctrace or bctrace is None)): |
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802 # copytrace='off' skips this line, but not the entire function because |
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803 # the line below is O(size of the repo) during a rebase, while the rest |
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804 # of the function is much faster (and is required for carrying copy |
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805 # metadata across the rebase anyway). |
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806 exclude = pathcopies(repo[fromrev], repo[skiprev]) |
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807 for dst, src in pathcopies(repo[fromrev], repo[rev]).iteritems(): |
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808 if dst in exclude: |
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809 continue |
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810 if dst in wctx: |
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811 wctx[dst].markcopied(src) |