Mercurial > hg
annotate mercurial/copies.py @ 42227:d1c2688eda80
copies: document cases in _chain()
Differential Revision: https://phab.mercurial-scm.org/D6274
author | Martin von Zweigbergk <martinvonz@google.com> |
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date | Wed, 17 Apr 2019 23:10:14 -0700 |
parents | a6be3af3a397 |
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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 _chain(src, dst, a, b): |
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111 """chain two sets of copies 'a' and 'b'""" |
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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 # Initialize result ('t') from 'a'. This catches cases 1 & 2. We'll remove |
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128 # case 1 later. We'll also catch cases 3 & 4 here. Case 4 will be |
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129 # overwritten later, and case 3 will be removed later. |
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130 t = a.copy() |
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131 for k, v in b.iteritems(): |
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132 if v in t: |
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133 # found a chain, i.e. cases 3 & 4. |
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134 if t[v] != k: |
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135 # file wasn't renamed back to itself (i.e. case 4, not 3) |
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136 t[k] = t[v] |
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137 if v not in dst: |
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138 # chain was a rename, not a copy |
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139 # this deletes the copy for 'y' in case 4 |
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140 del t[v] |
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141 if v in src: |
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142 # file is a copy of an existing file, i.e. case 6. |
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143 t[k] = v |
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144 |
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145 for k, v in list(t.items()): |
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146 # remove criss-crossed copies, i.e. case 3 |
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147 if k in src and v in dst: |
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148 del t[k] |
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149 # remove copies to files that were then removed, i.e. case 1 |
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150 # and file 'y' in cases 3 & 4 (in case of rename) |
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151 elif k not in dst: |
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152 del t[k] |
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153 |
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154 return t |
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155 |
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156 def _tracefile(fctx, am, limit=node.nullrev): |
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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 if am.get(f.path(), None) == f.filenode(): |
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162 return f |
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163 if limit >= 0 and not f.isintroducedafter(limit): |
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164 return None |
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165 |
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166 def _dirstatecopies(repo, match=None): |
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167 ds = repo.dirstate |
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168 c = ds.copies().copy() |
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169 for k in list(c): |
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170 if ds[k] not in 'anm' or (match and not match(k)): |
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171 del c[k] |
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172 return c |
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173 |
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174 def _computeforwardmissing(a, b, match=None): |
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175 """Computes which files are in b but not a. |
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176 This is its own function so extensions can easily wrap this call to see what |
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177 files _forwardcopies is about to process. |
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178 """ |
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179 ma = a.manifest() |
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180 mb = b.manifest() |
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181 return mb.filesnotin(ma, match=match) |
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182 |
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183 def usechangesetcentricalgo(repo): |
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184 """Checks if we should use changeset-centric copy algorithms""" |
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185 return (repo.ui.config('experimental', 'copies.read-from') in |
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186 ('changeset-only', 'compatibility')) |
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187 |
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188 def _committedforwardcopies(a, b, match): |
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189 """Like _forwardcopies(), but b.rev() cannot be None (working copy)""" |
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190 # files might have to be traced back to the fctx parent of the last |
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191 # one-side-only changeset, but not further back than that |
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192 repo = a._repo |
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193 |
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194 if usechangesetcentricalgo(repo): |
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195 return _changesetforwardcopies(a, b, match) |
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196 |
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197 debug = repo.ui.debugflag and repo.ui.configbool('devel', 'debug.copies') |
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198 dbg = repo.ui.debug |
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199 if debug: |
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200 dbg('debug.copies: looking into rename from %s to %s\n' |
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201 % (a, b)) |
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202 limit = _findlimit(repo, a, b) |
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203 if debug: |
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204 dbg('debug.copies: search limit: %d\n' % limit) |
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205 am = a.manifest() |
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206 |
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207 # find where new files came from |
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208 # we currently don't try to find where old files went, too expensive |
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209 # this means we can miss a case like 'hg rm b; hg cp a b' |
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210 cm = {} |
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211 |
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212 # Computing the forward missing is quite expensive on large manifests, since |
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213 # it compares the entire manifests. We can optimize it in the common use |
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214 # case of computing what copies are in a commit versus its parent (like |
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215 # during a rebase or histedit). Note, we exclude merge commits from this |
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216 # optimization, since the ctx.files() for a merge commit is not correct for |
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217 # this comparison. |
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218 forwardmissingmatch = match |
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219 if b.p1() == a and b.p2().node() == node.nullid: |
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220 filesmatcher = matchmod.exact(b.files()) |
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221 forwardmissingmatch = matchmod.intersectmatchers(match, filesmatcher) |
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222 missing = _computeforwardmissing(a, b, match=forwardmissingmatch) |
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223 |
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224 ancestrycontext = a._repo.changelog.ancestors([b.rev()], inclusive=True) |
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225 |
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226 if debug: |
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227 dbg('debug.copies: missing files to search: %d\n' % len(missing)) |
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228 |
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229 for f in sorted(missing): |
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230 if debug: |
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231 dbg('debug.copies: tracing file: %s\n' % f) |
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232 fctx = b[f] |
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233 fctx._ancestrycontext = ancestrycontext |
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234 |
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235 if debug: |
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236 start = util.timer() |
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237 ofctx = _tracefile(fctx, am, limit) |
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238 if ofctx: |
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239 if debug: |
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240 dbg('debug.copies: rename of: %s\n' % ofctx._path) |
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241 cm[f] = ofctx.path() |
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242 if debug: |
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243 dbg('debug.copies: time: %f seconds\n' |
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244 % (util.timer() - start)) |
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245 return cm |
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246 |
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247 def _changesetforwardcopies(a, b, match): |
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248 if a.rev() == node.nullrev: |
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249 return {} |
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250 |
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251 repo = a.repo() |
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252 children = {} |
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253 cl = repo.changelog |
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254 missingrevs = cl.findmissingrevs(common=[a.rev()], heads=[b.rev()]) |
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255 for r in missingrevs: |
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256 for p in cl.parentrevs(r): |
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257 if p == node.nullrev: |
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258 continue |
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259 if p not in children: |
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260 children[p] = [r] |
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261 else: |
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262 children[p].append(r) |
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263 |
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264 roots = set(children) - set(missingrevs) |
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265 # 'work' contains 3-tuples of a (revision number, parent number, copies). |
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266 # The parent number is only used for knowing which parent the copies dict |
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267 # came from. |
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268 work = [(r, 1, {}) for r in roots] |
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269 heapq.heapify(work) |
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270 while work: |
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271 r, i1, copies1 = heapq.heappop(work) |
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272 if work and work[0][0] == r: |
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273 # We are tracing copies from both parents |
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274 r, i2, copies2 = heapq.heappop(work) |
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275 copies = {} |
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276 ctx = repo[r] |
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277 p1man, p2man = ctx.p1().manifest(), ctx.p2().manifest() |
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278 allcopies = set(copies1) | set(copies2) |
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279 # TODO: perhaps this filtering should be done as long as ctx |
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280 # is merge, whether or not we're tracing from both parent. |
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281 for dst in allcopies: |
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282 if not match(dst): |
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283 continue |
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284 if dst not in copies2: |
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285 # Copied on p1 side: mark as copy from p1 side if it didn't |
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286 # already exist on p2 side |
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287 if dst not in p2man: |
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288 copies[dst] = copies1[dst] |
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289 elif dst not in copies1: |
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290 # Copied on p2 side: mark as copy from p2 side if it didn't |
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291 # already exist on p1 side |
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292 if dst not in p1man: |
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293 copies[dst] = copies2[dst] |
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294 else: |
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295 # Copied on both sides: mark as copy from p1 side |
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296 copies[dst] = copies1[dst] |
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297 else: |
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298 copies = copies1 |
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299 if r == b.rev(): |
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300 return copies |
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301 for c in 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 match.always(): |
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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 childcopies = _chain(a, childctx, copies, childcopies) |
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314 heapq.heappush(work, (c, parent, childcopies)) |
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315 assert False |
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316 |
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317 def _forwardcopies(a, b, match=None): |
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318 """find {dst@b: src@a} copy mapping where a is an ancestor of b""" |
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319 |
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320 match = a.repo().narrowmatch(match) |
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321 # check for working copy |
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322 if b.rev() is None: |
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323 if a == b.p1(): |
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324 # short-circuit to avoid issues with merge states |
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325 return _dirstatecopies(b._repo, match) |
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326 |
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327 cm = _committedforwardcopies(a, b.p1(), match) |
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328 # combine copies from dirstate if necessary |
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329 return _chain(a, b, cm, _dirstatecopies(b._repo, match)) |
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330 return _committedforwardcopies(a, b, match) |
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331 |
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332 def _backwardrenames(a, b, match): |
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333 if a._repo.ui.config('experimental', 'copytrace') == 'off': |
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334 return {} |
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335 |
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336 # Even though we're not taking copies into account, 1:n rename situations |
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337 # can still exist (e.g. hg cp a b; hg mv a c). In those cases we |
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338 # arbitrarily pick one of the renames. |
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339 # We don't want to pass in "match" here, since that would filter |
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340 # the destination by it. Since we're reversing the copies, we want |
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341 # to filter the source instead. |
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342 f = _forwardcopies(b, a) |
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343 r = {} |
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344 for k, v in sorted(f.iteritems()): |
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345 if match and not match(v): |
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346 continue |
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347 # remove copies |
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348 if v in a: |
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349 continue |
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350 r[v] = k |
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351 return r |
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352 |
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353 def pathcopies(x, y, match=None): |
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354 """find {dst@y: src@x} copy mapping for directed compare""" |
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355 repo = x._repo |
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356 debug = repo.ui.debugflag and repo.ui.configbool('devel', 'debug.copies') |
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357 if debug: |
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358 repo.ui.debug('debug.copies: searching copies from %s to %s\n' |
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359 % (x, y)) |
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360 if x == y or not x or not y: |
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361 return {} |
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362 a = y.ancestor(x) |
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363 if a == x: |
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364 if debug: |
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365 repo.ui.debug('debug.copies: search mode: forward\n') |
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366 return _forwardcopies(x, y, match=match) |
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367 if a == y: |
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368 if debug: |
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369 repo.ui.debug('debug.copies: search mode: backward\n') |
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370 return _backwardrenames(x, y, match=match) |
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371 if debug: |
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372 repo.ui.debug('debug.copies: search mode: combined\n') |
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373 return _chain(x, y, _backwardrenames(x, a, match=match), |
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374 _forwardcopies(a, y, match=match)) |
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375 |
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376 def mergecopies(repo, c1, c2, base): |
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377 """ |
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378 Finds moves and copies between context c1 and c2 that are relevant for |
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379 merging. 'base' will be used as the merge base. |
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380 |
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381 Copytracing is used in commands like rebase, merge, unshelve, etc to merge |
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382 files that were moved/ copied in one merge parent and modified in another. |
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383 For example: |
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384 |
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385 o ---> 4 another commit |
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386 | |
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387 | o ---> 3 commit that modifies a.txt |
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388 | / |
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389 o / ---> 2 commit that moves a.txt to b.txt |
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390 |/ |
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391 o ---> 1 merge base |
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392 |
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393 If we try to rebase revision 3 on revision 4, since there is no a.txt in |
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394 revision 4, and if user have copytrace disabled, we prints the following |
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395 message: |
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396 |
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397 ```other changed <file> which local deleted``` |
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398 |
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399 Returns five dicts: "copy", "movewithdir", "diverge", "renamedelete" and |
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400 "dirmove". |
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401 |
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402 "copy" is a mapping from destination name -> source name, |
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403 where source is in c1 and destination is in c2 or vice-versa. |
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404 |
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405 "movewithdir" is a mapping from source name -> destination name, |
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406 where the file at source present in one context but not the other |
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407 needs to be moved to destination by the merge process, because the |
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408 other context moved the directory it is in. |
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409 |
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410 "diverge" is a mapping of source name -> list of destination names |
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411 for divergent renames. |
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412 |
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413 "renamedelete" is a mapping of source name -> list of destination |
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414 names for files deleted in c1 that were renamed in c2 or vice-versa. |
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415 |
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416 "dirmove" is a mapping of detected source dir -> destination dir renames. |
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417 This is needed for handling changes to new files previously grafted into |
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418 renamed directories. |
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419 |
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420 This function calls different copytracing algorithms based on config. |
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421 """ |
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422 # avoid silly behavior for update from empty dir |
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423 if not c1 or not c2 or c1 == c2: |
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424 return {}, {}, {}, {}, {} |
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425 |
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426 narrowmatch = c1.repo().narrowmatch() |
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427 |
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428 # avoid silly behavior for parent -> working dir |
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429 if c2.node() is None and c1.node() == repo.dirstate.p1(): |
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430 return _dirstatecopies(repo, narrowmatch), {}, {}, {}, {} |
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431 |
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432 copytracing = repo.ui.config('experimental', 'copytrace') |
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433 if stringutil.parsebool(copytracing) is False: |
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434 # stringutil.parsebool() returns None when it is unable to parse the |
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435 # value, so we should rely on making sure copytracing is on such cases |
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436 return {}, {}, {}, {}, {} |
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437 |
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438 if usechangesetcentricalgo(repo): |
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439 # The heuristics don't make sense when we need changeset-centric algos |
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440 return _fullcopytracing(repo, c1, c2, base) |
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441 |
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442 # Copy trace disabling is explicitly below the node == p1 logic above |
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443 # because the logic above is required for a simple copy to be kept across a |
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444 # rebase. |
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445 if copytracing == 'heuristics': |
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446 # Do full copytracing if only non-public revisions are involved as |
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447 # that will be fast enough and will also cover the copies which could |
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448 # be missed by heuristics |
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449 if _isfullcopytraceable(repo, c1, base): |
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450 return _fullcopytracing(repo, c1, c2, base) |
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451 return _heuristicscopytracing(repo, c1, c2, base) |
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452 else: |
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453 return _fullcopytracing(repo, c1, c2, base) |
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454 |
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455 def _isfullcopytraceable(repo, c1, base): |
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456 """ Checks that if base, source and destination are all no-public branches, |
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457 if yes let's use the full copytrace algorithm for increased capabilities |
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458 since it will be fast enough. |
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459 |
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460 `experimental.copytrace.sourcecommitlimit` can be used to set a limit for |
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461 number of changesets from c1 to base such that if number of changesets are |
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462 more than the limit, full copytracing algorithm won't be used. |
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463 """ |
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464 if c1.rev() is None: |
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465 c1 = c1.p1() |
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466 if c1.mutable() and base.mutable(): |
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467 sourcecommitlimit = repo.ui.configint('experimental', |
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468 'copytrace.sourcecommitlimit') |
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469 commits = len(repo.revs('%d::%d', base.rev(), c1.rev())) |
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470 return commits < sourcecommitlimit |
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471 return False |
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472 |
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473 def _checksinglesidecopies(src, dsts1, m1, m2, mb, c2, base, |
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474 copy, renamedelete): |
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475 if src not in m2: |
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476 # deleted on side 2 |
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477 if src not in m1: |
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478 # renamed on side 1, deleted on side 2 |
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479 renamedelete[src] = dsts1 |
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480 elif m2[src] != mb[src]: |
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481 if not _related(c2[src], base[src]): |
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482 return |
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483 # modified on side 2 |
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484 for dst in dsts1: |
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485 if dst not in m2: |
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486 # dst not added on side 2 (handle as regular |
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487 # "both created" case in manifestmerge otherwise) |
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488 copy[dst] = src |
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489 |
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490 def _fullcopytracing(repo, c1, c2, base): |
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491 """ The full copytracing algorithm which finds all the new files that were |
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492 added from merge base up to the top commit and for each file it checks if |
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493 this file was copied from another file. |
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494 |
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495 This is pretty slow when a lot of changesets are involved but will track all |
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496 the copies. |
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497 """ |
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498 m1 = c1.manifest() |
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499 m2 = c2.manifest() |
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500 mb = base.manifest() |
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501 |
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502 copies1 = pathcopies(base, c1) |
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503 copies2 = pathcopies(base, c2) |
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504 |
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505 inversecopies1 = {} |
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506 inversecopies2 = {} |
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507 for dst, src in copies1.items(): |
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508 inversecopies1.setdefault(src, []).append(dst) |
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509 for dst, src in copies2.items(): |
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510 inversecopies2.setdefault(src, []).append(dst) |
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511 |
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512 copy = {} |
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513 diverge = {} |
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514 renamedelete = {} |
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515 allsources = set(inversecopies1) | set(inversecopies2) |
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516 for src in allsources: |
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517 dsts1 = inversecopies1.get(src) |
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518 dsts2 = inversecopies2.get(src) |
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519 if dsts1 and dsts2: |
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520 # copied/renamed on both sides |
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521 if src not in m1 and src not in m2: |
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522 # renamed on both sides |
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523 dsts1 = set(dsts1) |
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524 dsts2 = set(dsts2) |
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525 # If there's some overlap in the rename destinations, we |
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526 # consider it not divergent. For example, if side 1 copies 'a' |
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527 # to 'b' and 'c' and deletes 'a', and side 2 copies 'a' to 'c' |
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528 # and 'd' and deletes 'a'. |
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529 if dsts1 & dsts2: |
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530 for dst in (dsts1 & dsts2): |
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531 copy[dst] = src |
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532 else: |
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533 diverge[src] = sorted(dsts1 | dsts2) |
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534 elif src in m1 and src in m2: |
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535 # copied on both sides |
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536 dsts1 = set(dsts1) |
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537 dsts2 = set(dsts2) |
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538 for dst in (dsts1 & dsts2): |
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539 copy[dst] = src |
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540 # TODO: Handle cases where it was renamed on one side and copied |
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541 # on the other side |
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542 elif dsts1: |
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543 # copied/renamed only on side 1 |
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544 _checksinglesidecopies(src, dsts1, m1, m2, mb, c2, base, |
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545 copy, renamedelete) |
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546 elif dsts2: |
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547 # copied/renamed only on side 2 |
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548 _checksinglesidecopies(src, dsts2, m2, m1, mb, c1, base, |
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549 copy, renamedelete) |
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550 |
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551 renamedeleteset = set() |
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552 divergeset = set() |
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a20d7c6abff2
copies: replace .items() by .values() where appropriate
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|
553 for dsts in diverge.values(): |
42222
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554 divergeset.update(dsts) |
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555 for dsts in renamedelete.values(): |
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556 renamedeleteset.update(dsts) |
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557 |
26659
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copies: group bothnew with other sets
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|
558 # find interesting file sets from manifests |
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559 addedinm1 = m1.filesnotin(mb, repo.narrowmatch()) |
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parents:
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560 addedinm2 = m2.filesnotin(mb, repo.narrowmatch()) |
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d69bc8ffbe6f
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parents:
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|
561 u1 = sorted(addedinm1 - addedinm2) |
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562 u2 = sorted(addedinm2 - addedinm1) |
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563 |
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564 header = " unmatched files in %s" |
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565 if u1: |
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|
566 repo.ui.debug("%s:\n %s\n" % (header % 'local', "\n ".join(u1))) |
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567 if u2: |
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parents:
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|
568 repo.ui.debug("%s:\n %s\n" % (header % 'other', "\n ".join(u2))) |
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parents:
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|
569 |
42222
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570 fullcopy = copies1.copy() |
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571 fullcopy.update(copies2) |
42166
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copies: move early return for "no copies" case a little earlier
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parents:
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|
572 if not fullcopy: |
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573 return copy, {}, diverge, renamedelete, {} |
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574 |
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575 if repo.ui.debugflag: |
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merge: show renamed on one and deleted on the other side in debug output
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parents:
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576 repo.ui.debug(" all copies found (* = to merge, ! = divergent, " |
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merge: show renamed on one and deleted on the other side in debug output
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577 "% = renamed and deleted):\n") |
18362
5a4f220fbfca
copies: report found copies sorted
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parents:
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578 for f in sorted(fullcopy): |
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579 note = "" |
10282
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many, many trivial check-code fixups
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580 if f in copy: |
08a0f04b56bd
many, many trivial check-code fixups
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changeset
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581 note += "*" |
26317
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582 if f in divergeset: |
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many, many trivial check-code fixups
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changeset
|
583 note += "!" |
26658
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copies: rename renamedelete to renamedeleteset for clarity
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parents:
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584 if f in renamedeleteset: |
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parents:
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|
585 note += "%" |
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586 repo.ui.debug(" src: '%s' -> dst: '%s' %s\n" % (fullcopy[f], f, |
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587 note)) |
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588 del divergeset |
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changeset
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589 |
9467
4c041f1ee1b4
do not attempt to translate ui.debug output
Martin Geisler <mg@lazybytes.net>
parents:
9102
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|
590 repo.ui.debug(" checking for directory renames\n") |
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591 |
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parents:
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592 # generate a directory move map |
16178
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copies: use ctx.dirs() for directory rename detection
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parents:
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|
593 d1, d2 = c1.dirs(), c2.dirs() |
25288
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copies: document hack for adding '' to set of dirs
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parents:
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diff
changeset
|
594 # Hack for adding '', which is not otherwise added, to d1 and d2 |
18899
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scmutil: use new dirs class in dirstate and context
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parents:
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changeset
|
595 d1.addpath('/') |
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parents:
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changeset
|
596 d2.addpath('/') |
17055
8b7cd9a998f0
copies: re-include root directory in directory rename detection (issue3511)
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parents:
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597 invalid = set() |
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|
598 dirmove = {} |
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changeset
|
599 |
f3f383efbeae
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changeset
|
600 # examine each file copy for a potential directory move, which is |
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|
601 # when all the files in a directory are moved to a new directory |
7622
4dd7b28003d2
use dict.iteritems() rather than dict.items()
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents:
6762
diff
changeset
|
602 for dst, src in fullcopy.iteritems(): |
25282
0f28815ef066
copies: switch to using pathutil.dirname
Durham Goode <durham@fb.com>
parents:
24782
diff
changeset
|
603 dsrc, ddst = pathutil.dirname(src), pathutil.dirname(dst) |
6274
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diff
changeset
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604 if dsrc in invalid: |
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parents:
diff
changeset
|
605 # already seen to be uninteresting |
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Matt Mackall <mpm@selenic.com>
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diff
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|
606 continue |
f3f383efbeae
copies: move findcopies code to its own module
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parents:
diff
changeset
|
607 elif dsrc in d1 and ddst in d1: |
f3f383efbeae
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parents:
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changeset
|
608 # directory wasn't entirely moved locally |
39263
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copies: correctly skip directories that have already been considered
Kyle Lippincott <spectral@google.com>
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|
609 invalid.add(dsrc) |
6274
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610 elif dsrc in d2 and ddst in d2: |
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diff
changeset
|
611 # directory wasn't entirely moved remotely |
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|
612 invalid.add(dsrc) |
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changeset
|
613 elif dsrc in dirmove and dirmove[dsrc] != ddst: |
6274
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parents:
diff
changeset
|
614 # files from the same directory moved to two different places |
39263
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changeset
|
615 invalid.add(dsrc) |
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diff
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|
616 else: |
f3f383efbeae
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diff
changeset
|
617 # looks good so far |
39263
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|
618 dirmove[dsrc] = ddst |
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diff
changeset
|
619 |
f3f383efbeae
copies: move findcopies code to its own module
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parents:
diff
changeset
|
620 for i in invalid: |
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
621 if i in dirmove: |
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
622 del dirmove[i] |
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
623 del d1, d2, invalid |
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
624 |
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
625 if not dirmove: |
30581
43a9e02a7b7f
graft: support grafting changes to new file in renamed directory (issue5436)
Gábor Stefanik <gabor.stefanik@nng.com>
parents:
30361
diff
changeset
|
626 return copy, {}, diverge, renamedelete, {} |
6274
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parents:
diff
changeset
|
627 |
39263
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Kyle Lippincott <spectral@google.com>
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38670
diff
changeset
|
628 dirmove = {k + "/": v + "/" for k, v in dirmove.iteritems()} |
eebd591803ab
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changeset
|
629 |
6274
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diff
changeset
|
630 for d in dirmove: |
18135
a6fe1b9cc68f
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Siddharth Agarwal <sid0@fb.com>
parents:
18134
diff
changeset
|
631 repo.ui.debug(" discovered dir src: '%s' -> dst: '%s'\n" % |
a6fe1b9cc68f
copies: make debug messages more sensible
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parents:
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diff
changeset
|
632 (d, dirmove[d])) |
6274
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parents:
diff
changeset
|
633 |
30183
0106f93ca1d5
checkcopies: move 'movewithdir' initialisation right before its usage
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents:
30138
diff
changeset
|
634 movewithdir = {} |
6274
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parents:
diff
changeset
|
635 # check unaccounted nonoverlapping files against directory moves |
42222
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
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parents:
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diff
changeset
|
636 for f in u1 + u2: |
6274
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parents:
diff
changeset
|
637 if f not in fullcopy: |
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
638 for d in dirmove: |
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
639 if f.startswith(d): |
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
640 # new file added in a directory that was moved, move it |
6425
2d9328a2f81f
copies: skip directory rename checks when not merging
Matt Mackall <mpm@selenic.com>
parents:
6424
diff
changeset
|
641 df = dirmove[d] + f[len(d):] |
6426
e2c49ef2dd6e
copies: don't double-detect items in the directory copy check
Matt Mackall <mpm@selenic.com>
parents:
6425
diff
changeset
|
642 if df not in copy: |
18134
6c35b53cd28b
copies: separate moves via directory renames from explicit copies
Siddharth Agarwal <sid0@fb.com>
parents:
17055
diff
changeset
|
643 movewithdir[f] = df |
18135
a6fe1b9cc68f
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Siddharth Agarwal <sid0@fb.com>
parents:
18134
diff
changeset
|
644 repo.ui.debug((" pending file src: '%s' -> " |
a6fe1b9cc68f
copies: make debug messages more sensible
Siddharth Agarwal <sid0@fb.com>
parents:
18134
diff
changeset
|
645 "dst: '%s'\n") % (f, df)) |
6274
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parents:
diff
changeset
|
646 break |
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
647 |
30581
43a9e02a7b7f
graft: support grafting changes to new file in renamed directory (issue5436)
Gábor Stefanik <gabor.stefanik@nng.com>
parents:
30361
diff
changeset
|
648 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
|
649 |
34179
036d47d7cf39
copytrace: move fast heuristic copytracing algorithm to core
Pulkit Goyal <7895pulkit@gmail.com>
parents:
34078
diff
changeset
|
650 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
|
651 """ Fast copytracing using filename heuristics |
036d47d7cf39
copytrace: move fast heuristic copytracing algorithm to core
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diff
changeset
|
652 |
036d47d7cf39
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parents:
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diff
changeset
|
653 Assumes that moves or renames are of following two types: |
036d47d7cf39
copytrace: move fast heuristic copytracing algorithm to core
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diff
changeset
|
654 |
036d47d7cf39
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parents:
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diff
changeset
|
655 1) Inside a directory only (same directory name but different filenames) |
036d47d7cf39
copytrace: move fast heuristic copytracing algorithm to core
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parents:
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diff
changeset
|
656 2) Move from one directory to another |
036d47d7cf39
copytrace: move fast heuristic copytracing algorithm to core
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parents:
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diff
changeset
|
657 (same filenames but different directory names) |
036d47d7cf39
copytrace: move fast heuristic copytracing algorithm to core
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parents:
34078
diff
changeset
|
658 |
036d47d7cf39
copytrace: move fast heuristic copytracing algorithm to core
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parents:
34078
diff
changeset
|
659 Works only when there are no merge commits in the "source branch". |
036d47d7cf39
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parents:
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diff
changeset
|
660 Source branch is commits from base up to c2 not including base. |
036d47d7cf39
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parents:
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diff
changeset
|
661 |
036d47d7cf39
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parents:
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diff
changeset
|
662 If merge is involved it fallbacks to _fullcopytracing(). |
036d47d7cf39
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parents:
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diff
changeset
|
663 |
036d47d7cf39
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parents:
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diff
changeset
|
664 Can be used by setting the following config: |
036d47d7cf39
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parents:
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diff
changeset
|
665 |
036d47d7cf39
copytrace: move fast heuristic copytracing algorithm to core
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666 [experimental] |
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667 copytrace = heuristics |
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668 |
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669 In some cases the copy/move candidates found by heuristics can be very large |
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670 in number and that will make the algorithm slow. The number of possible |
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671 candidates to check can be limited by using the config |
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672 `experimental.copytrace.movecandidateslimit` which defaults to 100. |
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673 """ |
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674 |
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675 if c1.rev() is None: |
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676 c1 = c1.p1() |
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677 if c2.rev() is None: |
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678 c2 = c2.p1() |
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679 |
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680 copies = {} |
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681 |
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682 changedfiles = set() |
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683 m1 = c1.manifest() |
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684 if not repo.revs('%d::%d', base.rev(), c2.rev()): |
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685 # If base is not in c2 branch, we switch to fullcopytracing |
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686 repo.ui.debug("switching to full copytracing as base is not " |
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687 "an ancestor of c2\n") |
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688 return _fullcopytracing(repo, c1, c2, base) |
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689 |
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690 ctx = c2 |
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691 while ctx != base: |
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692 if len(ctx.parents()) == 2: |
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693 # To keep things simple let's not handle merges |
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694 repo.ui.debug("switching to full copytracing because of merges\n") |
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695 return _fullcopytracing(repo, c1, c2, base) |
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696 changedfiles.update(ctx.files()) |
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697 ctx = ctx.p1() |
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698 |
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699 cp = _forwardcopies(base, c2) |
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700 for dst, src in cp.iteritems(): |
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701 if src in m1: |
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702 copies[dst] = src |
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703 |
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704 # file is missing if it isn't present in the destination, but is present in |
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705 # the base and present in the source. |
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706 # Presence in the base is important to exclude added files, presence in the |
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707 # source is important to exclude removed files. |
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708 filt = lambda f: f not in m1 and f in base and f in c2 |
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709 missingfiles = [f for f in changedfiles if filt(f)] |
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710 |
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711 if missingfiles: |
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712 basenametofilename = collections.defaultdict(list) |
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713 dirnametofilename = collections.defaultdict(list) |
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714 |
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715 for f in m1.filesnotin(base.manifest()): |
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716 basename = os.path.basename(f) |
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717 dirname = os.path.dirname(f) |
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718 basenametofilename[basename].append(f) |
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719 dirnametofilename[dirname].append(f) |
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720 |
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721 for f in missingfiles: |
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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 samebasename = basenametofilename[basename] |
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725 samedirname = dirnametofilename[dirname] |
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726 movecandidates = samebasename + samedirname |
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727 # f is guaranteed to be present in c2, that's why |
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728 # c2.filectx(f) won't fail |
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729 f2 = c2.filectx(f) |
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730 # we can have a lot of candidates which can slow down the heuristics |
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731 # config value to limit the number of candidates moves to check |
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732 maxcandidates = repo.ui.configint('experimental', |
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733 'copytrace.movecandidateslimit') |
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734 |
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735 if len(movecandidates) > maxcandidates: |
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736 repo.ui.status(_("skipping copytracing for '%s', more " |
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737 "candidates than the limit: %d\n") |
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738 % (f, len(movecandidates))) |
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739 continue |
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740 |
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741 for candidate in movecandidates: |
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742 f1 = c1.filectx(candidate) |
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743 if _related(f1, f2): |
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744 # if there are a few related copies then we'll merge |
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745 # changes into all of them. This matches the behaviour |
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746 # of upstream copytracing |
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747 copies[candidate] = f |
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748 |
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749 return copies, {}, {}, {}, {} |
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750 |
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751 def _related(f1, f2): |
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752 """return True if f1 and f2 filectx have a common ancestor |
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753 |
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754 Walk back to common ancestor to see if the two files originate |
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755 from the same file. Since workingfilectx's rev() is None it messes |
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756 up the integer comparison logic, hence the pre-step check for |
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757 None (f1 and f2 can only be workingfilectx's initially). |
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758 """ |
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759 |
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760 if f1 == f2: |
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|
761 return True # a match |
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762 |
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763 g1, g2 = f1.ancestors(), f2.ancestors() |
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764 try: |
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765 f1r, f2r = f1.linkrev(), f2.linkrev() |
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766 |
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767 if f1r is None: |
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768 f1 = next(g1) |
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769 if f2r is None: |
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770 f2 = next(g2) |
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771 |
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772 while True: |
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773 f1r, f2r = f1.linkrev(), f2.linkrev() |
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774 if f1r > f2r: |
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775 f1 = next(g1) |
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776 elif f2r > f1r: |
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777 f2 = next(g2) |
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778 else: # f1 and f2 point to files in the same linkrev |
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779 return f1 == f2 # true if they point to the same file |
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780 except StopIteration: |
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781 return False |
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782 |
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783 def duplicatecopies(repo, wctx, rev, fromrev, skiprev=None): |
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784 """reproduce copies from fromrev to rev in the dirstate |
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785 |
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786 If skiprev is specified, it's a revision that should be used to |
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787 filter copy records. Any copies that occur between fromrev and |
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788 skiprev will not be duplicated, even if they appear in the set of |
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789 copies between fromrev and rev. |
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790 """ |
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791 exclude = {} |
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792 ctraceconfig = repo.ui.config('experimental', 'copytrace') |
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793 bctrace = stringutil.parsebool(ctraceconfig) |
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794 if (skiprev is not None and |
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795 (ctraceconfig == 'heuristics' or bctrace or bctrace is None)): |
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796 # copytrace='off' skips this line, but not the entire function because |
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797 # the line below is O(size of the repo) during a rebase, while the rest |
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798 # of the function is much faster (and is required for carrying copy |
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799 # metadata across the rebase anyway). |
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800 exclude = pathcopies(repo[fromrev], repo[skiprev]) |
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801 for dst, src in pathcopies(repo[fromrev], repo[rev]).iteritems(): |
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802 # copies.pathcopies returns backward renames, so dst might not |
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803 # actually be in the dirstate |
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804 if dst in exclude: |
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805 continue |
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806 wctx[dst].markcopied(src) |