Mercurial > hg
annotate mercurial/copies.py @ 32658:55ff67ffcead
scmutil: introduce binnode(ctx) as paired function with intrev(ctx)
It seemed silly to convert ctx.hex() back to binary to use node.hex/short(),
or to use [:12] instead of node.short() because ctx.node() could be None.
Eventually I want to change wctx.rev() and wctx.node() to return wdirrev and
wdirid respectively, but that's quite big API breakage and can't be achieved
without some compatibility wrappers.
author | Yuya Nishihara <yuya@tcha.org> |
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date | Sat, 03 Jun 2017 19:12:01 +0900 |
parents | aeac3cbcbbc1 |
children | 42ad7cc645a4 |
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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 heapq |
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11 |
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12 from . import ( |
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13 node, |
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14 pathutil, |
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15 scmutil, |
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16 util, |
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17 ) |
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18 |
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19 def _findlimit(repo, a, b): |
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20 """ |
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21 Find the last revision that needs to be checked to ensure that a full |
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22 transitive closure for file copies can be properly calculated. |
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23 Generally, this means finding the earliest revision number that's an |
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24 ancestor of a or b but not both, except when a or b is a direct descendent |
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25 of the other, in which case we can return the minimum revnum of a and b. |
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26 None if no such revision exists. |
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27 """ |
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28 |
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29 # basic idea: |
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30 # - mark a and b with different sides |
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31 # - if a parent's children are all on the same side, the parent is |
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32 # on that side, otherwise it is on no side |
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33 # - walk the graph in topological order with the help of a heap; |
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34 # - add unseen parents to side map |
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35 # - clear side of any parent that has children on different sides |
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36 # - track number of interesting revs that might still be on a side |
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37 # - track the lowest interesting rev seen |
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38 # - quit when interesting revs is zero |
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39 |
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40 cl = repo.changelog |
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41 working = len(cl) # pseudo rev for the working directory |
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42 if a is None: |
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43 a = working |
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44 if b is None: |
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45 b = working |
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46 |
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47 side = {a: -1, b: 1} |
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48 visit = [-a, -b] |
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49 heapq.heapify(visit) |
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50 interesting = len(visit) |
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51 hascommonancestor = False |
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52 limit = working |
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53 |
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54 while interesting: |
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55 r = -heapq.heappop(visit) |
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56 if r == working: |
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57 parents = [cl.rev(p) for p in repo.dirstate.parents()] |
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58 else: |
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59 parents = cl.parentrevs(r) |
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60 for p in parents: |
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61 if p < 0: |
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62 continue |
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63 if p not in side: |
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64 # first time we see p; add it to visit |
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65 side[p] = side[r] |
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66 if side[p]: |
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67 interesting += 1 |
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68 heapq.heappush(visit, -p) |
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69 elif side[p] and side[p] != side[r]: |
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70 # p was interesting but now we know better |
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71 side[p] = 0 |
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72 interesting -= 1 |
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73 hascommonancestor = True |
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74 if side[r]: |
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75 limit = r # lowest rev visited |
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76 interesting -= 1 |
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77 |
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78 if not hascommonancestor: |
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79 return None |
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80 |
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81 # Consider the following flow (see test-commit-amend.t under issue4405): |
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82 # 1/ File 'a0' committed |
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83 # 2/ File renamed from 'a0' to 'a1' in a new commit (call it 'a1') |
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84 # 3/ Move back to first commit |
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85 # 4/ Create a new commit via revert to contents of 'a1' (call it 'a1-amend') |
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86 # 5/ Rename file from 'a1' to 'a2' and commit --amend 'a1-msg' |
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87 # |
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88 # During the amend in step five, we will be in this state: |
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89 # |
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90 # @ 3 temporary amend commit for a1-amend |
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91 # | |
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92 # o 2 a1-amend |
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93 # | |
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94 # | o 1 a1 |
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95 # |/ |
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96 # o 0 a0 |
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97 # |
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98 # When _findlimit is called, a and b are revs 3 and 0, so limit will be 2, |
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99 # yet the filelog has the copy information in rev 1 and we will not look |
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100 # back far enough unless we also look at the a and b as candidates. |
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101 # This only occurs when a is a descendent of b or visa-versa. |
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102 return min(limit, a, b) |
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103 |
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104 def _chain(src, dst, a, b): |
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105 '''chain two sets of copies a->b''' |
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106 t = a.copy() |
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107 for k, v in b.iteritems(): |
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108 if v in t: |
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109 # found a chain |
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110 if t[v] != k: |
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111 # file wasn't renamed back to itself |
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112 t[k] = t[v] |
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113 if v not in dst: |
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114 # chain was a rename, not a copy |
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115 del t[v] |
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116 if v in src: |
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117 # file is a copy of an existing file |
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118 t[k] = v |
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119 |
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120 # remove criss-crossed copies |
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121 for k, v in t.items(): |
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122 if k in src and v in dst: |
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123 del t[k] |
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124 |
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125 return t |
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126 |
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127 def _tracefile(fctx, am, limit=-1): |
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128 '''return file context that is the ancestor of fctx present in ancestor |
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129 manifest am, stopping after the first ancestor lower than limit''' |
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130 |
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131 for f in fctx.ancestors(): |
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132 if am.get(f.path(), None) == f.filenode(): |
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133 return f |
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134 if limit >= 0 and f.linkrev() < limit and f.rev() < limit: |
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135 return None |
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136 |
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137 def _dirstatecopies(d): |
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138 ds = d._repo.dirstate |
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139 c = ds.copies().copy() |
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140 for k in c.keys(): |
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141 if ds[k] not in 'anm': |
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142 del c[k] |
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143 return c |
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144 |
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145 def _computeforwardmissing(a, b, match=None): |
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146 """Computes which files are in b but not a. |
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147 This is its own function so extensions can easily wrap this call to see what |
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148 files _forwardcopies is about to process. |
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149 """ |
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150 ma = a.manifest() |
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151 mb = b.manifest() |
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152 return mb.filesnotin(ma, match=match) |
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153 |
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154 def _forwardcopies(a, b, match=None): |
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155 '''find {dst@b: src@a} copy mapping where a is an ancestor of b''' |
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156 |
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157 # check for working copy |
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158 w = None |
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159 if b.rev() is None: |
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160 w = b |
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161 b = w.p1() |
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162 if a == b: |
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163 # short-circuit to avoid issues with merge states |
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164 return _dirstatecopies(w) |
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165 |
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166 # files might have to be traced back to the fctx parent of the last |
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167 # one-side-only changeset, but not further back than that |
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168 limit = _findlimit(a._repo, a.rev(), b.rev()) |
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169 if limit is None: |
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170 limit = -1 |
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171 am = a.manifest() |
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172 |
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173 # find where new files came from |
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174 # we currently don't try to find where old files went, too expensive |
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175 # this means we can miss a case like 'hg rm b; hg cp a b' |
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176 cm = {} |
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177 |
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178 # Computing the forward missing is quite expensive on large manifests, since |
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179 # it compares the entire manifests. We can optimize it in the common use |
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180 # case of computing what copies are in a commit versus its parent (like |
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181 # during a rebase or histedit). Note, we exclude merge commits from this |
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182 # optimization, since the ctx.files() for a merge commit is not correct for |
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183 # this comparison. |
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184 forwardmissingmatch = match |
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185 if not match and b.p1() == a and b.p2().node() == node.nullid: |
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186 forwardmissingmatch = scmutil.matchfiles(a._repo, b.files()) |
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187 missing = _computeforwardmissing(a, b, match=forwardmissingmatch) |
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188 |
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189 ancestrycontext = a._repo.changelog.ancestors([b.rev()], inclusive=True) |
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190 for f in missing: |
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191 fctx = b[f] |
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192 fctx._ancestrycontext = ancestrycontext |
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193 ofctx = _tracefile(fctx, am, limit) |
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194 if ofctx: |
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195 cm[f] = ofctx.path() |
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196 |
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197 # combine copies from dirstate if necessary |
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198 if w is not None: |
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199 cm = _chain(a, w, cm, _dirstatecopies(w)) |
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200 |
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201 return cm |
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202 |
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203 def _backwardrenames(a, b): |
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204 if a._repo.ui.configbool('experimental', 'disablecopytrace'): |
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205 return {} |
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206 |
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207 # Even though we're not taking copies into account, 1:n rename situations |
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208 # can still exist (e.g. hg cp a b; hg mv a c). In those cases we |
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209 # arbitrarily pick one of the renames. |
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210 f = _forwardcopies(b, a) |
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211 r = {} |
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212 for k, v in sorted(f.iteritems()): |
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213 # remove copies |
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214 if v in a: |
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215 continue |
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216 r[v] = k |
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217 return r |
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218 |
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219 def pathcopies(x, y, match=None): |
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220 '''find {dst@y: src@x} copy mapping for directed compare''' |
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221 if x == y or not x or not y: |
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222 return {} |
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223 a = y.ancestor(x) |
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224 if a == x: |
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225 return _forwardcopies(x, y, match=match) |
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226 if a == y: |
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227 return _backwardrenames(x, y) |
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228 return _chain(x, y, _backwardrenames(x, a), |
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229 _forwardcopies(a, y, match=match)) |
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230 |
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231 def _computenonoverlap(repo, c1, c2, addedinm1, addedinm2, baselabel=''): |
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232 """Computes, based on addedinm1 and addedinm2, the files exclusive to c1 |
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233 and c2. This is its own function so extensions can easily wrap this call |
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234 to see what files mergecopies is about to process. |
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235 |
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236 Even though c1 and c2 are not used in this function, they are useful in |
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237 other extensions for being able to read the file nodes of the changed files. |
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238 |
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239 "baselabel" can be passed to help distinguish the multiple computations |
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240 done in the graft case. |
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241 """ |
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242 u1 = sorted(addedinm1 - addedinm2) |
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243 u2 = sorted(addedinm2 - addedinm1) |
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244 |
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245 header = " unmatched files in %s" |
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246 if baselabel: |
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247 header += ' (from %s)' % baselabel |
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248 if u1: |
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249 repo.ui.debug("%s:\n %s\n" % (header % 'local', "\n ".join(u1))) |
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250 if u2: |
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251 repo.ui.debug("%s:\n %s\n" % (header % 'other', "\n ".join(u2))) |
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252 return u1, u2 |
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253 |
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254 def _makegetfctx(ctx): |
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255 """return a 'getfctx' function suitable for _checkcopies usage |
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256 |
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257 We have to re-setup the function building 'filectx' for each |
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258 '_checkcopies' to ensure the linkrev adjustment is properly setup for |
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259 each. Linkrev adjustment is important to avoid bug in rename |
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260 detection. Moreover, having a proper '_ancestrycontext' setup ensures |
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261 the performance impact of this adjustment is kept limited. Without it, |
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262 each file could do a full dag traversal making the time complexity of |
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263 the operation explode (see issue4537). |
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264 |
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265 This function exists here mostly to limit the impact on stable. Feel |
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266 free to refactor on default. |
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267 """ |
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268 rev = ctx.rev() |
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269 repo = ctx._repo |
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270 ac = getattr(ctx, '_ancestrycontext', None) |
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271 if ac is None: |
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272 revs = [rev] |
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273 if rev is None: |
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274 revs = [p.rev() for p in ctx.parents()] |
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275 ac = repo.changelog.ancestors(revs, inclusive=True) |
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276 ctx._ancestrycontext = ac |
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277 def makectx(f, n): |
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278 if n in node.wdirnodes: # in a working context? |
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279 if ctx.rev() is None: |
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280 return ctx.filectx(f) |
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281 return repo[None][f] |
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282 fctx = repo.filectx(f, fileid=n) |
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283 # setup only needed for filectx not create from a changectx |
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284 fctx._ancestrycontext = ac |
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285 fctx._descendantrev = rev |
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286 return fctx |
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287 return util.lrucachefunc(makectx) |
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288 |
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289 def _combinecopies(copyfrom, copyto, finalcopy, diverge, incompletediverge): |
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290 """combine partial copy paths""" |
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291 remainder = {} |
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292 for f in copyfrom: |
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293 if f in copyto: |
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294 finalcopy[copyto[f]] = copyfrom[f] |
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295 del copyto[f] |
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296 for f in incompletediverge: |
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297 assert f not in diverge |
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298 ic = incompletediverge[f] |
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299 if ic[0] in copyto: |
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300 diverge[f] = [copyto[ic[0]], ic[1]] |
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301 else: |
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302 remainder[f] = ic |
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303 return remainder |
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304 |
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305 def mergecopies(repo, c1, c2, base): |
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306 """ |
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307 Find moves and copies between context c1 and c2 that are relevant |
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308 for merging. 'base' will be used as the merge base. |
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309 |
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310 Returns five dicts: "copy", "movewithdir", "diverge", "renamedelete" and |
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311 "dirmove". |
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312 |
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313 "copy" is a mapping from destination name -> source name, |
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314 where source is in c1 and destination is in c2 or vice-versa. |
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315 |
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316 "movewithdir" is a mapping from source name -> destination name, |
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317 where the file at source present in one context but not the other |
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318 needs to be moved to destination by the merge process, because the |
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319 other context moved the directory it is in. |
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320 |
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321 "diverge" is a mapping of source name -> list of destination names |
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322 for divergent renames. |
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323 |
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324 "renamedelete" is a mapping of source name -> list of destination |
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325 names for files deleted in c1 that were renamed in c2 or vice-versa. |
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326 |
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327 "dirmove" is a mapping of detected source dir -> destination dir renames. |
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328 This is needed for handling changes to new files previously grafted into |
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329 renamed directories. |
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330 """ |
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331 # avoid silly behavior for update from empty dir |
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332 if not c1 or not c2 or c1 == c2: |
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333 return {}, {}, {}, {}, {} |
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334 |
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335 # avoid silly behavior for parent -> working dir |
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336 if c2.node() is None and c1.node() == repo.dirstate.p1(): |
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337 return repo.dirstate.copies(), {}, {}, {}, {} |
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338 |
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339 # Copy trace disabling is explicitly below the node == p1 logic above |
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340 # because the logic above is required for a simple copy to be kept across a |
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341 # rebase. |
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342 if repo.ui.configbool('experimental', 'disablecopytrace'): |
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343 return {}, {}, {}, {}, {} |
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344 |
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345 # In certain scenarios (e.g. graft, update or rebase), base can be |
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346 # overridden We still need to know a real common ancestor in this case We |
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347 # can't just compute _c1.ancestor(_c2) and compare it to ca, because there |
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348 # can be multiple common ancestors, e.g. in case of bidmerge. Because our |
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349 # caller may not know if the revision passed in lieu of the CA is a genuine |
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350 # common ancestor or not without explicitly checking it, it's better to |
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351 # determine that here. |
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352 # |
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353 # base.descendant(wc) and base.descendant(base) are False, work around that |
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354 _c1 = c1.p1() if c1.rev() is None else c1 |
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355 _c2 = c2.p1() if c2.rev() is None else c2 |
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356 # an endpoint is "dirty" if it isn't a descendant of the merge base |
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357 # if we have a dirty endpoint, we need to trigger graft logic, and also |
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358 # keep track of which endpoint is dirty |
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359 dirtyc1 = not (base == _c1 or base.descendant(_c1)) |
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360 dirtyc2 = not (base== _c2 or base.descendant(_c2)) |
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361 graft = dirtyc1 or dirtyc2 |
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362 tca = base |
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363 if graft: |
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364 tca = _c1.ancestor(_c2) |
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365 |
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366 limit = _findlimit(repo, c1.rev(), c2.rev()) |
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367 if limit is None: |
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368 # no common ancestor, no copies |
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369 return {}, {}, {}, {}, {} |
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370 repo.ui.debug(" searching for copies back to rev %d\n" % limit) |
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371 |
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372 m1 = c1.manifest() |
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373 m2 = c2.manifest() |
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374 mb = base.manifest() |
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375 |
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376 # gather data from _checkcopies: |
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377 # - diverge = record all diverges in this dict |
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378 # - copy = record all non-divergent copies in this dict |
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379 # - fullcopy = record all copies in this dict |
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380 # - incomplete = record non-divergent partial copies here |
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381 # - incompletediverge = record divergent partial copies here |
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382 diverge = {} # divergence data is shared |
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383 incompletediverge = {} |
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384 data1 = {'copy': {}, |
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385 'fullcopy': {}, |
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386 'incomplete': {}, |
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387 'diverge': diverge, |
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388 'incompletediverge': incompletediverge, |
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389 } |
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390 data2 = {'copy': {}, |
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391 'fullcopy': {}, |
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392 'incomplete': {}, |
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393 'diverge': diverge, |
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394 'incompletediverge': incompletediverge, |
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395 } |
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396 |
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397 # find interesting file sets from manifests |
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398 addedinm1 = m1.filesnotin(mb) |
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399 addedinm2 = m2.filesnotin(mb) |
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400 bothnew = sorted(addedinm1 & addedinm2) |
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401 if tca == base: |
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402 # unmatched file from base |
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403 u1r, u2r = _computenonoverlap(repo, c1, c2, addedinm1, addedinm2) |
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404 u1u, u2u = u1r, u2r |
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405 else: |
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406 # unmatched file from base (DAG rotation in the graft case) |
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407 u1r, u2r = _computenonoverlap(repo, c1, c2, addedinm1, addedinm2, |
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408 baselabel='base') |
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409 # unmatched file from topological common ancestors (no DAG rotation) |
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410 # need to recompute this for directory move handling when grafting |
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411 mta = tca.manifest() |
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412 u1u, u2u = _computenonoverlap(repo, c1, c2, m1.filesnotin(mta), |
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413 m2.filesnotin(mta), |
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414 baselabel='topological common ancestor') |
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415 |
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416 for f in u1u: |
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417 _checkcopies(c1, c2, f, base, tca, dirtyc1, limit, data1) |
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418 |
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419 for f in u2u: |
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420 _checkcopies(c2, c1, f, base, tca, dirtyc2, limit, data2) |
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421 |
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422 copy = dict(data1['copy']) |
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423 copy.update(data2['copy']) |
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424 fullcopy = dict(data1['fullcopy']) |
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425 fullcopy.update(data2['fullcopy']) |
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426 |
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427 if dirtyc1: |
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428 _combinecopies(data2['incomplete'], data1['incomplete'], copy, diverge, |
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429 incompletediverge) |
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430 else: |
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431 _combinecopies(data1['incomplete'], data2['incomplete'], copy, diverge, |
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432 incompletediverge) |
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433 |
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434 renamedelete = {} |
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435 renamedeleteset = set() |
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436 divergeset = set() |
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437 for of, fl in diverge.items(): |
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438 if len(fl) == 1 or of in c1 or of in c2: |
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439 del diverge[of] # not actually divergent, or not a rename |
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440 if of not in c1 and of not in c2: |
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441 # renamed on one side, deleted on the other side, but filter |
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442 # out files that have been renamed and then deleted |
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443 renamedelete[of] = [f for f in fl if f in c1 or f in c2] |
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444 renamedeleteset.update(fl) # reverse map for below |
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445 else: |
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446 divergeset.update(fl) # reverse map for below |
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447 |
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448 if bothnew: |
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449 repo.ui.debug(" unmatched files new in both:\n %s\n" |
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450 % "\n ".join(bothnew)) |
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checkcopies: pass data as a dictionary of dictionaries
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451 bothdiverge = {} |
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452 bothincompletediverge = {} |
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453 remainder = {} |
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454 both1 = {'copy': {}, |
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455 'fullcopy': {}, |
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456 'incomplete': {}, |
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457 'diverge': bothdiverge, |
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458 'incompletediverge': bothincompletediverge |
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459 } |
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460 both2 = {'copy': {}, |
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461 'fullcopy': {}, |
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462 'incomplete': {}, |
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463 'diverge': bothdiverge, |
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464 'incompletediverge': bothincompletediverge |
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465 } |
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466 for f in bothnew: |
32563
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Stanislau Hlebik <stash@fb.com>
parents:
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467 _checkcopies(c1, c2, f, base, tca, dirtyc1, limit, both1) |
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468 _checkcopies(c2, c1, f, base, tca, dirtyc2, limit, both2) |
30202
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469 if dirtyc1: |
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470 # incomplete copies may only be found on the "dirty" side for bothnew |
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471 assert not both2['incomplete'] |
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472 remainder = _combinecopies({}, both1['incomplete'], copy, bothdiverge, |
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473 bothincompletediverge) |
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474 elif dirtyc2: |
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475 assert not both1['incomplete'] |
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476 remainder = _combinecopies({}, both2['incomplete'], copy, bothdiverge, |
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477 bothincompletediverge) |
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478 else: |
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479 # incomplete copies and divergences can't happen outside grafts |
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480 assert not both1['incomplete'] |
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481 assert not both2['incomplete'] |
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482 assert not bothincompletediverge |
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483 for f in remainder: |
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484 assert f not in bothdiverge |
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485 ic = remainder[f] |
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486 if ic[0] in (m1 if dirtyc1 else m2): |
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487 # backed-out rename on one side, but watch out for deleted files |
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parents:
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|
488 bothdiverge[f] = ic |
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489 for of, fl in bothdiverge.items(): |
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490 if len(fl) == 2 and fl[0] == fl[1]: |
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491 copy[fl[0]] = of # not actually divergent, just matching renames |
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492 |
20990
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copies: guard debug section with ui.debugflag
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parents:
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changeset
|
493 if fullcopy and repo.ui.debugflag: |
16795
e9ae770eff1c
merge: show renamed on one and deleted on the other side in debug output
Thomas Arendsen Hein <thomas@intevation.de>
parents:
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changeset
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494 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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parents:
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|
495 "% = renamed and deleted):\n") |
18362
5a4f220fbfca
copies: report found copies sorted
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parents:
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496 for f in sorted(fullcopy): |
6274
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parents:
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497 note = "" |
10282
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many, many trivial check-code fixups
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498 if f in copy: |
08a0f04b56bd
many, many trivial check-code fixups
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499 note += "*" |
26317
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copies: rename diverge2 to divergeset for clarity
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500 if f in divergeset: |
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501 note += "!" |
26658
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copies: rename renamedelete to renamedeleteset for clarity
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parents:
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|
502 if f in renamedeleteset: |
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|
503 note += "%" |
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504 repo.ui.debug(" src: '%s' -> dst: '%s' %s\n" % (fullcopy[f], f, |
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changeset
|
505 note)) |
26317
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506 del divergeset |
6274
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parents:
diff
changeset
|
507 |
16169
c12d4aceba79
copies: remove checkdirs options
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parents:
16168
diff
changeset
|
508 if not fullcopy: |
30581
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graft: support grafting changes to new file in renamed directory (issue5436)
Gábor Stefanik <gabor.stefanik@nng.com>
parents:
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|
509 return copy, {}, diverge, renamedelete, {} |
6274
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parents:
diff
changeset
|
510 |
9467
4c041f1ee1b4
do not attempt to translate ui.debug output
Martin Geisler <mg@lazybytes.net>
parents:
9102
diff
changeset
|
511 repo.ui.debug(" checking for directory renames\n") |
6274
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changeset
|
512 |
f3f383efbeae
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parents:
diff
changeset
|
513 # generate a directory move map |
16178
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copies: use ctx.dirs() for directory rename detection
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parents:
16177
diff
changeset
|
514 d1, d2 = c1.dirs(), c2.dirs() |
25288
947771ad5174
copies: document hack for adding '' to set of dirs
Martin von Zweigbergk <martinvonz@google.com>
parents:
25282
diff
changeset
|
515 # Hack for adding '', which is not otherwise added, to d1 and d2 |
18899
d8ff607ef721
scmutil: use new dirs class in dirstate and context
Bryan O'Sullivan <bryano@fb.com>
parents:
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diff
changeset
|
516 d1.addpath('/') |
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parents:
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diff
changeset
|
517 d2.addpath('/') |
17055
8b7cd9a998f0
copies: re-include root directory in directory rename detection (issue3511)
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parents:
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|
518 invalid = set() |
6274
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changeset
|
519 dirmove = {} |
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parents:
diff
changeset
|
520 |
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changeset
|
521 # examine each file copy for a potential directory move, which is |
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changeset
|
522 # 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
|
523 for dst, src in fullcopy.iteritems(): |
25282
0f28815ef066
copies: switch to using pathutil.dirname
Durham Goode <durham@fb.com>
parents:
24782
diff
changeset
|
524 dsrc, ddst = pathutil.dirname(src), pathutil.dirname(dst) |
6274
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|
525 if dsrc in invalid: |
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diff
changeset
|
526 # already seen to be uninteresting |
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diff
changeset
|
527 continue |
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parents:
diff
changeset
|
528 elif dsrc in d1 and ddst in d1: |
f3f383efbeae
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parents:
diff
changeset
|
529 # directory wasn't entirely moved locally |
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changeset
|
530 invalid.add(dsrc + "/") |
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diff
changeset
|
531 elif dsrc in d2 and ddst in d2: |
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parents:
diff
changeset
|
532 # directory wasn't entirely moved remotely |
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changeset
|
533 invalid.add(dsrc + "/") |
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changeset
|
534 elif dsrc + "/" in dirmove and dirmove[dsrc + "/"] != ddst + "/": |
6274
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parents:
diff
changeset
|
535 # files from the same directory moved to two different places |
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changeset
|
536 invalid.add(dsrc + "/") |
6274
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parents:
diff
changeset
|
537 else: |
f3f383efbeae
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parents:
diff
changeset
|
538 # looks good so far |
f3f383efbeae
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parents:
diff
changeset
|
539 dirmove[dsrc + "/"] = ddst + "/" |
f3f383efbeae
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parents:
diff
changeset
|
540 |
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
541 for i in invalid: |
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
542 if i in dirmove: |
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
543 del dirmove[i] |
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
544 del d1, d2, invalid |
f3f383efbeae
copies: move findcopies code to its own module
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parents:
diff
changeset
|
545 |
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
546 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
|
547 return copy, {}, diverge, renamedelete, {} |
6274
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parents:
diff
changeset
|
548 |
f3f383efbeae
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
549 for d in dirmove: |
18135
a6fe1b9cc68f
copies: make debug messages more sensible
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parents:
18134
diff
changeset
|
550 repo.ui.debug(" discovered dir src: '%s' -> dst: '%s'\n" % |
a6fe1b9cc68f
copies: make debug messages more sensible
Siddharth Agarwal <sid0@fb.com>
parents:
18134
diff
changeset
|
551 (d, dirmove[d])) |
6274
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copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
552 |
30183
0106f93ca1d5
checkcopies: move 'movewithdir' initialisation right before its usage
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents:
30138
diff
changeset
|
553 movewithdir = {} |
6274
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
554 # check unaccounted nonoverlapping files against directory moves |
30047
d13a7c8bf0a5
copies: split u1/u2 to u1u/u2u and u1r/u2r
Gábor Stefanik <gabor.stefanik@nng.com>
parents:
30046
diff
changeset
|
555 for f in u1r + u2r: |
6274
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
556 if f not in fullcopy: |
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
557 for d in dirmove: |
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
558 if f.startswith(d): |
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
559 # 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
|
560 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
|
561 if df not in copy: |
18134
6c35b53cd28b
copies: separate moves via directory renames from explicit copies
Siddharth Agarwal <sid0@fb.com>
parents:
17055
diff
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|
562 movewithdir[f] = df |
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563 repo.ui.debug((" pending file src: '%s' -> " |
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564 "dst: '%s'\n") % (f, df)) |
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565 break |
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566 |
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567 return copy, movewithdir, diverge, renamedelete, dirmove |
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568 |
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569 def _related(f1, f2, limit): |
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570 """return True if f1 and f2 filectx have a common ancestor |
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571 |
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572 Walk back to common ancestor to see if the two files originate |
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573 from the same file. Since workingfilectx's rev() is None it messes |
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574 up the integer comparison logic, hence the pre-step check for |
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575 None (f1 and f2 can only be workingfilectx's initially). |
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576 """ |
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577 |
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578 if f1 == f2: |
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579 return f1 # a match |
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580 |
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581 g1, g2 = f1.ancestors(), f2.ancestors() |
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582 try: |
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583 f1r, f2r = f1.linkrev(), f2.linkrev() |
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584 |
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585 if f1r is None: |
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586 f1 = next(g1) |
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587 if f2r is None: |
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588 f2 = next(g2) |
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589 |
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590 while True: |
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591 f1r, f2r = f1.linkrev(), f2.linkrev() |
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592 if f1r > f2r: |
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593 f1 = next(g1) |
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594 elif f2r > f1r: |
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595 f2 = next(g2) |
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596 elif f1 == f2: |
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597 return f1 # a match |
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598 elif f1r == f2r or f1r < limit or f2r < limit: |
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599 return False # copy no longer relevant |
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600 except StopIteration: |
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601 return False |
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602 |
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603 def _checkcopies(srcctx, dstctx, f, base, tca, remotebase, limit, data): |
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604 """ |
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605 check possible copies of f from msrc to mdst |
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606 |
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607 srcctx = starting context for f in msrc |
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608 dstctx = destination context for f in mdst |
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609 f = the filename to check (as in msrc) |
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610 base = the changectx used as a merge base |
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611 tca = topological common ancestor for graft-like scenarios |
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612 remotebase = True if base is outside tca::srcctx, False otherwise |
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613 limit = the rev number to not search beyond |
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614 data = dictionary of dictionary to store copy data. (see mergecopies) |
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615 |
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616 note: limit is only an optimization, and there is no guarantee that |
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617 irrelevant revisions will not be limited |
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618 there is no easy way to make this algorithm stop in a guaranteed way |
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619 once it "goes behind a certain revision". |
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620 """ |
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621 |
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622 msrc = srcctx.manifest() |
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623 mdst = dstctx.manifest() |
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624 mb = base.manifest() |
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625 mta = tca.manifest() |
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626 # Might be true if this call is about finding backward renames, |
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627 # This happens in the case of grafts because the DAG is then rotated. |
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628 # If the file exists in both the base and the source, we are not looking |
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629 # for a rename on the source side, but on the part of the DAG that is |
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630 # traversed backwards. |
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631 # |
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632 # In the case there is both backward and forward renames (before and after |
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633 # the base) this is more complicated as we must detect a divergence. |
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634 # We use 'backwards = False' in that case. |
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635 backwards = not remotebase and base != tca and f in mb |
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636 getsrcfctx = _makegetfctx(srcctx) |
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637 getdstfctx = _makegetfctx(dstctx) |
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638 |
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639 if msrc[f] == mb.get(f) and not remotebase: |
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640 # Nothing to merge |
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641 return |
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642 |
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643 of = None |
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644 seen = {f} |
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645 for oc in getsrcfctx(f, msrc[f]).ancestors(): |
25279
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646 ocr = oc.linkrev() |
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647 of = oc.path() |
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648 if of in seen: |
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649 # check limit late - grab last rename before |
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650 if ocr < limit: |
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651 break |
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652 continue |
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653 seen.add(of) |
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654 |
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655 # remember for dir rename detection |
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656 if backwards: |
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657 data['fullcopy'][of] = f # grafting backwards through renames |
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658 else: |
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659 data['fullcopy'][f] = of |
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660 if of not in mdst: |
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661 continue # no match, keep looking |
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662 if mdst[of] == mb.get(of): |
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663 return # no merge needed, quit early |
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664 c2 = getdstfctx(of, mdst[of]) |
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665 # c2 might be a plain new file on added on destination side that is |
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666 # unrelated to the droids we are looking for. |
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667 cr = _related(oc, c2, tca.rev()) |
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668 if cr and (of == f or of == c2.path()): # non-divergent |
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669 if backwards: |
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670 data['copy'][of] = f |
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671 elif of in mb: |
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672 data['copy'][f] = of |
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673 elif remotebase: # special case: a <- b <- a -> b "ping-pong" rename |
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674 data['copy'][of] = f |
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675 del data['fullcopy'][f] |
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676 data['fullcopy'][of] = f |
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677 else: # divergence w.r.t. graft CA on one side of topological CA |
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678 for sf in seen: |
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679 if sf in mb: |
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680 assert sf not in data['diverge'] |
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681 data['diverge'][sf] = [f, of] |
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682 break |
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683 return |
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684 |
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685 if of in mta: |
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686 if backwards or remotebase: |
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687 data['incomplete'][of] = f |
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688 else: |
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689 for sf in seen: |
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690 if sf in mb: |
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691 if tca == base: |
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692 data['diverge'].setdefault(sf, []).append(f) |
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693 else: |
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694 data['incompletediverge'][sf] = [of, f] |
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695 return |
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696 |
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697 def duplicatecopies(repo, rev, fromrev, skiprev=None): |
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698 '''reproduce copies from fromrev to rev in the dirstate |
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699 |
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700 If skiprev is specified, it's a revision that should be used to |
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701 filter copy records. Any copies that occur between fromrev and |
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702 skiprev will not be duplicated, even if they appear in the set of |
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703 copies between fromrev and rev. |
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704 ''' |
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705 exclude = {} |
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706 if (skiprev is not None and |
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707 not repo.ui.configbool('experimental', 'disablecopytrace')): |
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708 # disablecopytrace skips this line, but not the entire function because |
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709 # the line below is O(size of the repo) during a rebase, while the rest |
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710 # of the function is much faster (and is required for carrying copy |
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711 # metadata across the rebase anyway). |
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712 exclude = pathcopies(repo[fromrev], repo[skiprev]) |
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713 for dst, src in pathcopies(repo[fromrev], repo[rev]).iteritems(): |
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714 # copies.pathcopies returns backward renames, so dst might not |
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715 # actually be in the dirstate |
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716 if dst in exclude: |
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717 continue |
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718 if repo.dirstate[dst] in "nma": |
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719 repo.dirstate.copy(src, dst) |