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@@ -1,997 +1,997 b'' | |||
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1 | 1 | # copies.py - copy detection for Mercurial |
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2 | 2 | # |
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3 | 3 | # Copyright 2008 Matt Mackall <mpm@selenic.com> |
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4 | 4 | # |
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5 | 5 | # This software may be used and distributed according to the terms of the |
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6 | 6 | # GNU General Public License version 2 or any later version. |
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7 | 7 | |
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8 | 8 | from __future__ import absolute_import |
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9 | 9 | |
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10 | 10 | import collections |
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11 | 11 | import os |
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12 | 12 | |
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13 | 13 | from .i18n import _ |
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14 | 14 | |
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15 | 15 | |
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16 | 16 | from .revlogutils.flagutil import REVIDX_SIDEDATA |
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17 | 17 | |
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18 | 18 | from . import ( |
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19 | 19 | match as matchmod, |
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20 | 20 | node, |
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21 | 21 | pathutil, |
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22 | 22 | pycompat, |
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23 | 23 | util, |
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24 | 24 | ) |
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25 | 25 | |
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26 | 26 | |
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27 | 27 | from .utils import stringutil |
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28 | 28 | |
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29 | 29 | |
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30 | 30 | def _filter(src, dst, t): |
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31 | 31 | """filters out invalid copies after chaining""" |
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32 | 32 | |
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33 | 33 | # When _chain()'ing copies in 'a' (from 'src' via some other commit 'mid') |
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34 | 34 | # with copies in 'b' (from 'mid' to 'dst'), we can get the different cases |
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35 | 35 | # in the following table (not including trivial cases). For example, case 2 |
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36 | 36 | # is where a file existed in 'src' and remained under that name in 'mid' and |
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37 | 37 | # then was renamed between 'mid' and 'dst'. |
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38 | 38 | # |
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39 | 39 | # case src mid dst result |
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40 | 40 | # 1 x y - - |
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41 | 41 | # 2 x y y x->y |
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42 | 42 | # 3 x y x - |
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43 | 43 | # 4 x y z x->z |
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44 | 44 | # 5 - x y - |
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45 | 45 | # 6 x x y x->y |
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46 | 46 | # |
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47 | 47 | # _chain() takes care of chaining the copies in 'a' and 'b', but it |
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48 | 48 | # cannot tell the difference between cases 1 and 2, between 3 and 4, or |
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49 | 49 | # between 5 and 6, so it includes all cases in its result. |
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50 | 50 | # Cases 1, 3, and 5 are then removed by _filter(). |
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51 | 51 | |
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52 | 52 | for k, v in list(t.items()): |
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53 | 53 | # remove copies from files that didn't exist |
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54 | 54 | if v not in src: |
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55 | 55 | del t[k] |
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56 | 56 | # remove criss-crossed copies |
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57 | 57 | elif k in src and v in dst: |
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58 | 58 | del t[k] |
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59 | 59 | # remove copies to files that were then removed |
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60 | 60 | elif k not in dst: |
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61 | 61 | del t[k] |
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62 | 62 | |
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63 | 63 | |
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64 | 64 | def _chain(prefix, suffix): |
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65 | 65 | """chain two sets of copies 'prefix' and 'suffix'""" |
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66 | 66 | result = prefix.copy() |
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67 | 67 | for key, value in pycompat.iteritems(suffix): |
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68 | 68 | result[key] = prefix.get(value, value) |
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69 | 69 | return result |
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70 | 70 | |
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71 | 71 | |
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72 | 72 | def _tracefile(fctx, am, basemf): |
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73 | 73 | """return file context that is the ancestor of fctx present in ancestor |
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74 | 74 | manifest am |
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75 | 75 | |
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76 | 76 | Note: we used to try and stop after a given limit, however checking if that |
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77 | 77 | limit is reached turned out to be very expensive. we are better off |
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78 | 78 | disabling that feature.""" |
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79 | 79 | |
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80 | 80 | for f in fctx.ancestors(): |
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81 | 81 | path = f.path() |
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82 | 82 | if am.get(path, None) == f.filenode(): |
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83 | 83 | return path |
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84 | 84 | if basemf and basemf.get(path, None) == f.filenode(): |
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85 | 85 | return path |
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86 | 86 | |
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87 | 87 | |
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88 | 88 | def _dirstatecopies(repo, match=None): |
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89 | 89 | ds = repo.dirstate |
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90 | 90 | c = ds.copies().copy() |
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91 | 91 | for k in list(c): |
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92 | 92 | if ds[k] not in b'anm' or (match and not match(k)): |
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93 | 93 | del c[k] |
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94 | 94 | return c |
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95 | 95 | |
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96 | 96 | |
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97 | 97 | def _computeforwardmissing(a, b, match=None): |
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98 | 98 | """Computes which files are in b but not a. |
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99 | 99 | This is its own function so extensions can easily wrap this call to see what |
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100 | 100 | files _forwardcopies is about to process. |
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101 | 101 | """ |
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102 | 102 | ma = a.manifest() |
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103 | 103 | mb = b.manifest() |
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104 | 104 | return mb.filesnotin(ma, match=match) |
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105 | 105 | |
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106 | 106 | |
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107 | 107 | def usechangesetcentricalgo(repo): |
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108 | 108 | """Checks if we should use changeset-centric copy algorithms""" |
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109 | 109 | if repo.filecopiesmode == b'changeset-sidedata': |
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110 | 110 | return True |
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111 | 111 | readfrom = repo.ui.config(b'experimental', b'copies.read-from') |
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112 | 112 | changesetsource = (b'changeset-only', b'compatibility') |
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113 | 113 | return readfrom in changesetsource |
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114 | 114 | |
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115 | 115 | |
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116 | 116 | def _committedforwardcopies(a, b, base, match): |
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117 | 117 | """Like _forwardcopies(), but b.rev() cannot be None (working copy)""" |
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118 | 118 | # files might have to be traced back to the fctx parent of the last |
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119 | 119 | # one-side-only changeset, but not further back than that |
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120 | 120 | repo = a._repo |
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121 | 121 | |
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122 | 122 | if usechangesetcentricalgo(repo): |
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123 | 123 | return _changesetforwardcopies(a, b, match) |
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124 | 124 | |
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125 | 125 | debug = repo.ui.debugflag and repo.ui.configbool(b'devel', b'debug.copies') |
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126 | 126 | dbg = repo.ui.debug |
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127 | 127 | if debug: |
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128 | 128 | dbg(b'debug.copies: looking into rename from %s to %s\n' % (a, b)) |
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129 | 129 | am = a.manifest() |
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130 | 130 | basemf = None if base is None else base.manifest() |
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131 | 131 | |
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132 | 132 | # find where new files came from |
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133 | 133 | # we currently don't try to find where old files went, too expensive |
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134 | 134 | # this means we can miss a case like 'hg rm b; hg cp a b' |
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135 | 135 | cm = {} |
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136 | 136 | |
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137 | 137 | # Computing the forward missing is quite expensive on large manifests, since |
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138 | 138 | # it compares the entire manifests. We can optimize it in the common use |
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139 | 139 | # case of computing what copies are in a commit versus its parent (like |
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140 | 140 | # during a rebase or histedit). Note, we exclude merge commits from this |
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141 | 141 | # optimization, since the ctx.files() for a merge commit is not correct for |
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142 | 142 | # this comparison. |
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143 | 143 | forwardmissingmatch = match |
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144 | 144 | if b.p1() == a and b.p2().node() == node.nullid: |
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145 | 145 | filesmatcher = matchmod.exact(b.files()) |
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146 | 146 | forwardmissingmatch = matchmod.intersectmatchers(match, filesmatcher) |
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147 | 147 | missing = _computeforwardmissing(a, b, match=forwardmissingmatch) |
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148 | 148 | |
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149 | 149 | ancestrycontext = a._repo.changelog.ancestors([b.rev()], inclusive=True) |
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150 | 150 | |
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151 | 151 | if debug: |
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152 | 152 | dbg(b'debug.copies: missing files to search: %d\n' % len(missing)) |
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153 | 153 | |
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154 | 154 | for f in sorted(missing): |
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155 | 155 | if debug: |
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156 | 156 | dbg(b'debug.copies: tracing file: %s\n' % f) |
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157 | 157 | fctx = b[f] |
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158 | 158 | fctx._ancestrycontext = ancestrycontext |
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159 | 159 | |
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160 | 160 | if debug: |
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161 | 161 | start = util.timer() |
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162 | 162 | opath = _tracefile(fctx, am, basemf) |
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163 | 163 | if opath: |
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164 | 164 | if debug: |
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165 | 165 | dbg(b'debug.copies: rename of: %s\n' % opath) |
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166 | 166 | cm[f] = opath |
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167 | 167 | if debug: |
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168 | 168 | dbg( |
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169 | 169 | b'debug.copies: time: %f seconds\n' |
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170 | 170 | % (util.timer() - start) |
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171 | 171 | ) |
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172 | 172 | return cm |
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173 | 173 | |
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174 | 174 | |
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175 | def _revinfogetter(repo): | |
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175 | def _revinfo_getter(repo): | |
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176 | 176 | """return a function that return multiple data given a <rev>"i |
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177 | 177 | |
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178 | 178 | * p1: revision number of first parent |
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179 | 179 | * p2: revision number of first parent |
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180 | 180 | * p1copies: mapping of copies from p1 |
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181 | 181 | * p2copies: mapping of copies from p2 |
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182 | 182 | * removed: a list of removed files |
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183 | 183 | * ismerged: a callback to know if file was merged in that revision |
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184 | 184 | """ |
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185 | 185 | cl = repo.changelog |
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186 | 186 | parents = cl.parentrevs |
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187 | 187 | |
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188 | 188 | def get_ismerged(rev): |
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189 | 189 | ctx = repo[rev] |
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190 | 190 | |
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191 | 191 | def ismerged(path): |
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192 | 192 | if path not in ctx.files(): |
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193 | 193 | return False |
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194 | 194 | fctx = ctx[path] |
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195 | 195 | parents = fctx._filelog.parents(fctx._filenode) |
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196 | 196 | nb_parents = 0 |
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197 | 197 | for n in parents: |
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198 | 198 | if n != node.nullid: |
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199 | 199 | nb_parents += 1 |
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200 | 200 | return nb_parents >= 2 |
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201 | 201 | |
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202 | 202 | return ismerged |
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203 | 203 | |
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204 | 204 | if repo.filecopiesmode == b'changeset-sidedata': |
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205 | 205 | changelogrevision = cl.changelogrevision |
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206 | 206 | flags = cl.flags |
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207 | 207 | |
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208 | 208 | # A small cache to avoid doing the work twice for merges |
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209 | 209 | # |
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210 | 210 | # In the vast majority of cases, if we ask information for a revision |
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211 | 211 | # about 1 parent, we'll later ask it for the other. So it make sense to |
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212 | 212 | # keep the information around when reaching the first parent of a merge |
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213 | 213 | # and dropping it after it was provided for the second parents. |
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214 | 214 | # |
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215 | 215 | # It exists cases were only one parent of the merge will be walked. It |
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216 | 216 | # happens when the "destination" the copy tracing is descendant from a |
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217 | 217 | # new root, not common with the "source". In that case, we will only walk |
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218 | 218 | # through merge parents that are descendant of changesets common |
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219 | 219 | # between "source" and "destination". |
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220 | 220 | # |
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221 | 221 | # With the current case implementation if such changesets have a copy |
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222 | 222 | # information, we'll keep them in memory until the end of |
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223 | 223 | # _changesetforwardcopies. We don't expect the case to be frequent |
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224 | 224 | # enough to matters. |
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225 | 225 | # |
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226 | 226 | # In addition, it would be possible to reach pathological case, were |
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227 | 227 | # many first parent are met before any second parent is reached. In |
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228 | 228 | # that case the cache could grow. If this even become an issue one can |
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229 | 229 | # safely introduce a maximum cache size. This would trade extra CPU/IO |
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230 | 230 | # time to save memory. |
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231 | 231 | merge_caches = {} |
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232 | 232 | |
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233 | 233 | def revinfo(rev): |
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234 | 234 | p1, p2 = parents(rev) |
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235 | 235 | value = None |
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236 | 236 | if flags(rev) & REVIDX_SIDEDATA: |
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237 | 237 | e = merge_caches.pop(rev, None) |
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238 | 238 | if e is not None: |
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239 | 239 | return e |
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240 | 240 | c = changelogrevision(rev) |
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241 | 241 | p1copies = c.p1copies |
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242 | 242 | p2copies = c.p2copies |
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243 | 243 | removed = c.filesremoved |
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244 | 244 | if p1 != node.nullrev and p2 != node.nullrev: |
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245 | 245 | # XXX some case we over cache, IGNORE |
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246 | 246 | value = merge_caches[rev] = ( |
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247 | 247 | p1, |
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248 | 248 | p2, |
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249 | 249 | p1copies, |
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250 | 250 | p2copies, |
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251 | 251 | removed, |
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252 | 252 | get_ismerged(rev), |
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253 | 253 | ) |
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254 | 254 | else: |
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255 | 255 | p1copies = {} |
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256 | 256 | p2copies = {} |
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257 | 257 | removed = [] |
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258 | 258 | |
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259 | 259 | if value is None: |
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260 | 260 | value = (p1, p2, p1copies, p2copies, removed, get_ismerged(rev)) |
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261 | 261 | return value |
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262 | 262 | |
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263 | 263 | else: |
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264 | 264 | |
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265 | 265 | def revinfo(rev): |
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266 | 266 | p1, p2 = parents(rev) |
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267 | 267 | ctx = repo[rev] |
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268 | 268 | p1copies, p2copies = ctx._copies |
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269 | 269 | removed = ctx.filesremoved() |
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270 | 270 | return p1, p2, p1copies, p2copies, removed, get_ismerged(rev) |
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271 | 271 | |
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272 | 272 | return revinfo |
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273 | 273 | |
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274 | 274 | |
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275 | 275 | def _changesetforwardcopies(a, b, match): |
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276 | 276 | if a.rev() in (node.nullrev, b.rev()): |
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277 | 277 | return {} |
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278 | 278 | |
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279 | 279 | repo = a.repo().unfiltered() |
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280 | 280 | children = {} |
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281 | revinfo = _revinfogetter(repo) | |
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281 | revinfo = _revinfo_getter(repo) | |
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282 | 282 | |
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283 | 283 | cl = repo.changelog |
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284 | 284 | isancestor = cl.isancestorrev # XXX we should had chaching to this. |
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285 | 285 | missingrevs = cl.findmissingrevs(common=[a.rev()], heads=[b.rev()]) |
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286 | 286 | mrset = set(missingrevs) |
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287 | 287 | roots = set() |
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288 | 288 | for r in missingrevs: |
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289 | 289 | for p in cl.parentrevs(r): |
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290 | 290 | if p == node.nullrev: |
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291 | 291 | continue |
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292 | 292 | if p not in children: |
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293 | 293 | children[p] = [r] |
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294 | 294 | else: |
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295 | 295 | children[p].append(r) |
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296 | 296 | if p not in mrset: |
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297 | 297 | roots.add(p) |
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298 | 298 | if not roots: |
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299 | 299 | # no common revision to track copies from |
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300 | 300 | return {} |
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301 | 301 | min_root = min(roots) |
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302 | 302 | |
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303 | 303 | from_head = set( |
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304 | 304 | cl.reachableroots(min_root, [b.rev()], list(roots), includepath=True) |
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305 | 305 | ) |
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306 | 306 | |
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307 | 307 | iterrevs = set(from_head) |
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308 | 308 | iterrevs &= mrset |
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309 | 309 | iterrevs.update(roots) |
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310 | 310 | iterrevs.remove(b.rev()) |
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311 | 311 | revs = sorted(iterrevs) |
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312 | return _combinechangesetcopies( | |
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312 | return _combine_changeset_copies( | |
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313 | 313 | revs, children, b.rev(), revinfo, match, isancestor |
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314 | 314 | ) |
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315 | 315 | |
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316 | 316 | |
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317 | def _combinechangesetcopies( | |
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317 | def _combine_changeset_copies( | |
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318 | 318 | revs, children, targetrev, revinfo, match, isancestor |
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319 | 319 | ): |
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320 | 320 | """combine the copies information for each item of iterrevs |
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321 | 321 | |
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322 | 322 | revs: sorted iterable of revision to visit |
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323 | 323 | children: a {parent: [children]} mapping. |
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324 | 324 | targetrev: the final copies destination revision (not in iterrevs) |
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325 | 325 | revinfo(rev): a function that return (p1, p2, p1copies, p2copies, removed) |
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326 | 326 | match: a matcher |
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327 | 327 | |
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328 | 328 | It returns the aggregated copies information for `targetrev`. |
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329 | 329 | """ |
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330 | 330 | all_copies = {} |
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331 | 331 | alwaysmatch = match.always() |
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332 | 332 | for r in revs: |
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333 | 333 | copies = all_copies.pop(r, None) |
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334 | 334 | if copies is None: |
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335 | 335 | # this is a root |
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336 | 336 | copies = {} |
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337 | 337 | for i, c in enumerate(children[r]): |
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338 | 338 | p1, p2, p1copies, p2copies, removed, ismerged = revinfo(c) |
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339 | 339 | if r == p1: |
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340 | 340 | parent = 1 |
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341 | 341 | childcopies = p1copies |
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342 | 342 | else: |
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343 | 343 | assert r == p2 |
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344 | 344 | parent = 2 |
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345 | 345 | childcopies = p2copies |
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346 | 346 | if not alwaysmatch: |
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347 | 347 | childcopies = { |
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348 | 348 | dst: src for dst, src in childcopies.items() if match(dst) |
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349 | 349 | } |
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350 | 350 | newcopies = copies |
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351 | 351 | if childcopies: |
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352 | 352 | newcopies = copies.copy() |
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353 | 353 | for dest, source in pycompat.iteritems(childcopies): |
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354 | 354 | prev = copies.get(source) |
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355 | 355 | if prev is not None and prev[1] is not None: |
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356 | 356 | source = prev[1] |
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357 | 357 | newcopies[dest] = (c, source) |
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358 | 358 | assert newcopies is not copies |
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359 | 359 | for f in removed: |
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360 | 360 | if f in newcopies: |
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361 | 361 | if newcopies is copies: |
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362 | 362 | # copy on write to avoid affecting potential other |
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363 | 363 | # branches. when there are no other branches, this |
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364 | 364 | # could be avoided. |
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365 | 365 | newcopies = copies.copy() |
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366 | 366 | newcopies[f] = (c, None) |
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367 | 367 | othercopies = all_copies.get(c) |
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368 | 368 | if othercopies is None: |
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369 | 369 | all_copies[c] = newcopies |
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370 | 370 | else: |
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371 | 371 | # we are the second parent to work on c, we need to merge our |
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372 | 372 | # work with the other. |
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373 | 373 | # |
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374 | 374 | # In case of conflict, parent 1 take precedence over parent 2. |
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375 | 375 | # This is an arbitrary choice made anew when implementing |
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376 | 376 | # changeset based copies. It was made without regards with |
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377 | 377 | # potential filelog related behavior. |
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378 | 378 | if parent == 1: |
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379 | 379 | _merge_copies_dict( |
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380 | 380 | othercopies, newcopies, isancestor, ismerged |
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381 | 381 | ) |
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382 | 382 | else: |
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383 | 383 | _merge_copies_dict( |
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384 | 384 | newcopies, othercopies, isancestor, ismerged |
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385 | 385 | ) |
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386 | 386 | all_copies[c] = newcopies |
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387 | 387 | |
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388 | 388 | final_copies = {} |
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389 | 389 | for dest, (tt, source) in all_copies[targetrev].items(): |
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390 | 390 | if source is not None: |
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391 | 391 | final_copies[dest] = source |
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392 | 392 | return final_copies |
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393 | 393 | |
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394 | 394 | |
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395 | 395 | def _merge_copies_dict(minor, major, isancestor, ismerged): |
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396 | 396 | """merge two copies-mapping together, minor and major |
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397 | 397 | |
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398 | 398 | In case of conflict, value from "major" will be picked. |
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399 | 399 | |
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400 | 400 | - `isancestors(low_rev, high_rev)`: callable return True if `low_rev` is an |
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401 | 401 | ancestors of `high_rev`, |
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402 | 402 | |
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403 | 403 | - `ismerged(path)`: callable return True if `path` have been merged in the |
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404 | 404 | current revision, |
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405 | 405 | """ |
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406 | 406 | for dest, value in major.items(): |
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407 | 407 | other = minor.get(dest) |
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408 | 408 | if other is None: |
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409 | 409 | minor[dest] = value |
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410 | 410 | else: |
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411 | 411 | new_tt = value[0] |
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412 | 412 | other_tt = other[0] |
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413 | 413 | if value[1] == other[1]: |
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414 | 414 | continue |
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415 | 415 | # content from "major" wins, unless it is older |
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416 | 416 | # than the branch point or there is a merge |
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417 | 417 | if ( |
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418 | 418 | new_tt == other_tt |
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419 | 419 | or not isancestor(new_tt, other_tt) |
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420 | 420 | or ismerged(dest) |
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421 | 421 | ): |
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422 | 422 | minor[dest] = value |
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423 | 423 | |
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424 | 424 | |
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425 | 425 | def _forwardcopies(a, b, base=None, match=None): |
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426 | 426 | """find {dst@b: src@a} copy mapping where a is an ancestor of b""" |
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427 | 427 | |
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428 | 428 | if base is None: |
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429 | 429 | base = a |
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430 | 430 | match = a.repo().narrowmatch(match) |
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431 | 431 | # check for working copy |
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432 | 432 | if b.rev() is None: |
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433 | 433 | cm = _committedforwardcopies(a, b.p1(), base, match) |
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434 | 434 | # combine copies from dirstate if necessary |
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435 | 435 | copies = _chain(cm, _dirstatecopies(b._repo, match)) |
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436 | 436 | else: |
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437 | 437 | copies = _committedforwardcopies(a, b, base, match) |
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438 | 438 | return copies |
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439 | 439 | |
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440 | 440 | |
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441 | 441 | def _backwardrenames(a, b, match): |
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442 | 442 | if a._repo.ui.config(b'experimental', b'copytrace') == b'off': |
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443 | 443 | return {} |
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444 | 444 | |
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445 | 445 | # Even though we're not taking copies into account, 1:n rename situations |
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446 | 446 | # can still exist (e.g. hg cp a b; hg mv a c). In those cases we |
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447 | 447 | # arbitrarily pick one of the renames. |
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448 | 448 | # We don't want to pass in "match" here, since that would filter |
|
449 | 449 | # the destination by it. Since we're reversing the copies, we want |
|
450 | 450 | # to filter the source instead. |
|
451 | 451 | f = _forwardcopies(b, a) |
|
452 | 452 | r = {} |
|
453 | 453 | for k, v in sorted(pycompat.iteritems(f)): |
|
454 | 454 | if match and not match(v): |
|
455 | 455 | continue |
|
456 | 456 | # remove copies |
|
457 | 457 | if v in a: |
|
458 | 458 | continue |
|
459 | 459 | r[v] = k |
|
460 | 460 | return r |
|
461 | 461 | |
|
462 | 462 | |
|
463 | 463 | def pathcopies(x, y, match=None): |
|
464 | 464 | """find {dst@y: src@x} copy mapping for directed compare""" |
|
465 | 465 | repo = x._repo |
|
466 | 466 | debug = repo.ui.debugflag and repo.ui.configbool(b'devel', b'debug.copies') |
|
467 | 467 | if debug: |
|
468 | 468 | repo.ui.debug( |
|
469 | 469 | b'debug.copies: searching copies from %s to %s\n' % (x, y) |
|
470 | 470 | ) |
|
471 | 471 | if x == y or not x or not y: |
|
472 | 472 | return {} |
|
473 | 473 | if y.rev() is None and x == y.p1(): |
|
474 | 474 | if debug: |
|
475 | 475 | repo.ui.debug(b'debug.copies: search mode: dirstate\n') |
|
476 | 476 | # short-circuit to avoid issues with merge states |
|
477 | 477 | return _dirstatecopies(repo, match) |
|
478 | 478 | a = y.ancestor(x) |
|
479 | 479 | if a == x: |
|
480 | 480 | if debug: |
|
481 | 481 | repo.ui.debug(b'debug.copies: search mode: forward\n') |
|
482 | 482 | copies = _forwardcopies(x, y, match=match) |
|
483 | 483 | elif a == y: |
|
484 | 484 | if debug: |
|
485 | 485 | repo.ui.debug(b'debug.copies: search mode: backward\n') |
|
486 | 486 | copies = _backwardrenames(x, y, match=match) |
|
487 | 487 | else: |
|
488 | 488 | if debug: |
|
489 | 489 | repo.ui.debug(b'debug.copies: search mode: combined\n') |
|
490 | 490 | base = None |
|
491 | 491 | if a.rev() != node.nullrev: |
|
492 | 492 | base = x |
|
493 | 493 | copies = _chain( |
|
494 | 494 | _backwardrenames(x, a, match=match), |
|
495 | 495 | _forwardcopies(a, y, base, match=match), |
|
496 | 496 | ) |
|
497 | 497 | _filter(x, y, copies) |
|
498 | 498 | return copies |
|
499 | 499 | |
|
500 | 500 | |
|
501 | 501 | def mergecopies(repo, c1, c2, base): |
|
502 | 502 | """ |
|
503 | 503 | Finds moves and copies between context c1 and c2 that are relevant for |
|
504 | 504 | merging. 'base' will be used as the merge base. |
|
505 | 505 | |
|
506 | 506 | Copytracing is used in commands like rebase, merge, unshelve, etc to merge |
|
507 | 507 | files that were moved/ copied in one merge parent and modified in another. |
|
508 | 508 | For example: |
|
509 | 509 | |
|
510 | 510 | o ---> 4 another commit |
|
511 | 511 | | |
|
512 | 512 | | o ---> 3 commit that modifies a.txt |
|
513 | 513 | | / |
|
514 | 514 | o / ---> 2 commit that moves a.txt to b.txt |
|
515 | 515 | |/ |
|
516 | 516 | o ---> 1 merge base |
|
517 | 517 | |
|
518 | 518 | If we try to rebase revision 3 on revision 4, since there is no a.txt in |
|
519 | 519 | revision 4, and if user have copytrace disabled, we prints the following |
|
520 | 520 | message: |
|
521 | 521 | |
|
522 | 522 | ```other changed <file> which local deleted``` |
|
523 | 523 | |
|
524 | 524 | Returns a tuple where: |
|
525 | 525 | |
|
526 | 526 | "branch_copies" an instance of branch_copies. |
|
527 | 527 | |
|
528 | 528 | "diverge" is a mapping of source name -> list of destination names |
|
529 | 529 | for divergent renames. |
|
530 | 530 | |
|
531 | 531 | This function calls different copytracing algorithms based on config. |
|
532 | 532 | """ |
|
533 | 533 | # avoid silly behavior for update from empty dir |
|
534 | 534 | if not c1 or not c2 or c1 == c2: |
|
535 | 535 | return branch_copies(), branch_copies(), {} |
|
536 | 536 | |
|
537 | 537 | narrowmatch = c1.repo().narrowmatch() |
|
538 | 538 | |
|
539 | 539 | # avoid silly behavior for parent -> working dir |
|
540 | 540 | if c2.node() is None and c1.node() == repo.dirstate.p1(): |
|
541 | 541 | return ( |
|
542 | 542 | branch_copies(_dirstatecopies(repo, narrowmatch)), |
|
543 | 543 | branch_copies(), |
|
544 | 544 | {}, |
|
545 | 545 | ) |
|
546 | 546 | |
|
547 | 547 | copytracing = repo.ui.config(b'experimental', b'copytrace') |
|
548 | 548 | if stringutil.parsebool(copytracing) is False: |
|
549 | 549 | # stringutil.parsebool() returns None when it is unable to parse the |
|
550 | 550 | # value, so we should rely on making sure copytracing is on such cases |
|
551 | 551 | return branch_copies(), branch_copies(), {} |
|
552 | 552 | |
|
553 | 553 | if usechangesetcentricalgo(repo): |
|
554 | 554 | # The heuristics don't make sense when we need changeset-centric algos |
|
555 | 555 | return _fullcopytracing(repo, c1, c2, base) |
|
556 | 556 | |
|
557 | 557 | # Copy trace disabling is explicitly below the node == p1 logic above |
|
558 | 558 | # because the logic above is required for a simple copy to be kept across a |
|
559 | 559 | # rebase. |
|
560 | 560 | if copytracing == b'heuristics': |
|
561 | 561 | # Do full copytracing if only non-public revisions are involved as |
|
562 | 562 | # that will be fast enough and will also cover the copies which could |
|
563 | 563 | # be missed by heuristics |
|
564 | 564 | if _isfullcopytraceable(repo, c1, base): |
|
565 | 565 | return _fullcopytracing(repo, c1, c2, base) |
|
566 | 566 | return _heuristicscopytracing(repo, c1, c2, base) |
|
567 | 567 | else: |
|
568 | 568 | return _fullcopytracing(repo, c1, c2, base) |
|
569 | 569 | |
|
570 | 570 | |
|
571 | 571 | def _isfullcopytraceable(repo, c1, base): |
|
572 | 572 | """ Checks that if base, source and destination are all no-public branches, |
|
573 | 573 | if yes let's use the full copytrace algorithm for increased capabilities |
|
574 | 574 | since it will be fast enough. |
|
575 | 575 | |
|
576 | 576 | `experimental.copytrace.sourcecommitlimit` can be used to set a limit for |
|
577 | 577 | number of changesets from c1 to base such that if number of changesets are |
|
578 | 578 | more than the limit, full copytracing algorithm won't be used. |
|
579 | 579 | """ |
|
580 | 580 | if c1.rev() is None: |
|
581 | 581 | c1 = c1.p1() |
|
582 | 582 | if c1.mutable() and base.mutable(): |
|
583 | 583 | sourcecommitlimit = repo.ui.configint( |
|
584 | 584 | b'experimental', b'copytrace.sourcecommitlimit' |
|
585 | 585 | ) |
|
586 | 586 | commits = len(repo.revs(b'%d::%d', base.rev(), c1.rev())) |
|
587 | 587 | return commits < sourcecommitlimit |
|
588 | 588 | return False |
|
589 | 589 | |
|
590 | 590 | |
|
591 | 591 | def _checksinglesidecopies( |
|
592 | 592 | src, dsts1, m1, m2, mb, c2, base, copy, renamedelete |
|
593 | 593 | ): |
|
594 | 594 | if src not in m2: |
|
595 | 595 | # deleted on side 2 |
|
596 | 596 | if src not in m1: |
|
597 | 597 | # renamed on side 1, deleted on side 2 |
|
598 | 598 | renamedelete[src] = dsts1 |
|
599 | 599 | elif src not in mb: |
|
600 | 600 | # Work around the "short-circuit to avoid issues with merge states" |
|
601 | 601 | # thing in pathcopies(): pathcopies(x, y) can return a copy where the |
|
602 | 602 | # destination doesn't exist in y. |
|
603 | 603 | pass |
|
604 | 604 | elif mb[src] != m2[src] and not _related(c2[src], base[src]): |
|
605 | 605 | return |
|
606 | 606 | elif mb[src] != m2[src] or mb.flags(src) != m2.flags(src): |
|
607 | 607 | # modified on side 2 |
|
608 | 608 | for dst in dsts1: |
|
609 | 609 | copy[dst] = src |
|
610 | 610 | |
|
611 | 611 | |
|
612 | 612 | class branch_copies(object): |
|
613 | 613 | """Information about copies made on one side of a merge/graft. |
|
614 | 614 | |
|
615 | 615 | "copy" is a mapping from destination name -> source name, |
|
616 | 616 | where source is in c1 and destination is in c2 or vice-versa. |
|
617 | 617 | |
|
618 | 618 | "movewithdir" is a mapping from source name -> destination name, |
|
619 | 619 | where the file at source present in one context but not the other |
|
620 | 620 | needs to be moved to destination by the merge process, because the |
|
621 | 621 | other context moved the directory it is in. |
|
622 | 622 | |
|
623 | 623 | "renamedelete" is a mapping of source name -> list of destination |
|
624 | 624 | names for files deleted in c1 that were renamed in c2 or vice-versa. |
|
625 | 625 | |
|
626 | 626 | "dirmove" is a mapping of detected source dir -> destination dir renames. |
|
627 | 627 | This is needed for handling changes to new files previously grafted into |
|
628 | 628 | renamed directories. |
|
629 | 629 | """ |
|
630 | 630 | |
|
631 | 631 | def __init__( |
|
632 | 632 | self, copy=None, renamedelete=None, dirmove=None, movewithdir=None |
|
633 | 633 | ): |
|
634 | 634 | self.copy = {} if copy is None else copy |
|
635 | 635 | self.renamedelete = {} if renamedelete is None else renamedelete |
|
636 | 636 | self.dirmove = {} if dirmove is None else dirmove |
|
637 | 637 | self.movewithdir = {} if movewithdir is None else movewithdir |
|
638 | 638 | |
|
639 | 639 | def __repr__(self): |
|
640 | 640 | return ( |
|
641 | 641 | '<branch_copies\n copy=%r\n renamedelete=%r\n dirmove=%r\n movewithdir=%r\n>' |
|
642 | 642 | % (self.copy, self.renamedelete, self.dirmove, self.movewithdir,) |
|
643 | 643 | ) |
|
644 | 644 | |
|
645 | 645 | |
|
646 | 646 | def _fullcopytracing(repo, c1, c2, base): |
|
647 | 647 | """ The full copytracing algorithm which finds all the new files that were |
|
648 | 648 | added from merge base up to the top commit and for each file it checks if |
|
649 | 649 | this file was copied from another file. |
|
650 | 650 | |
|
651 | 651 | This is pretty slow when a lot of changesets are involved but will track all |
|
652 | 652 | the copies. |
|
653 | 653 | """ |
|
654 | 654 | m1 = c1.manifest() |
|
655 | 655 | m2 = c2.manifest() |
|
656 | 656 | mb = base.manifest() |
|
657 | 657 | |
|
658 | 658 | copies1 = pathcopies(base, c1) |
|
659 | 659 | copies2 = pathcopies(base, c2) |
|
660 | 660 | |
|
661 | 661 | if not (copies1 or copies2): |
|
662 | 662 | return branch_copies(), branch_copies(), {} |
|
663 | 663 | |
|
664 | 664 | inversecopies1 = {} |
|
665 | 665 | inversecopies2 = {} |
|
666 | 666 | for dst, src in copies1.items(): |
|
667 | 667 | inversecopies1.setdefault(src, []).append(dst) |
|
668 | 668 | for dst, src in copies2.items(): |
|
669 | 669 | inversecopies2.setdefault(src, []).append(dst) |
|
670 | 670 | |
|
671 | 671 | copy1 = {} |
|
672 | 672 | copy2 = {} |
|
673 | 673 | diverge = {} |
|
674 | 674 | renamedelete1 = {} |
|
675 | 675 | renamedelete2 = {} |
|
676 | 676 | allsources = set(inversecopies1) | set(inversecopies2) |
|
677 | 677 | for src in allsources: |
|
678 | 678 | dsts1 = inversecopies1.get(src) |
|
679 | 679 | dsts2 = inversecopies2.get(src) |
|
680 | 680 | if dsts1 and dsts2: |
|
681 | 681 | # copied/renamed on both sides |
|
682 | 682 | if src not in m1 and src not in m2: |
|
683 | 683 | # renamed on both sides |
|
684 | 684 | dsts1 = set(dsts1) |
|
685 | 685 | dsts2 = set(dsts2) |
|
686 | 686 | # If there's some overlap in the rename destinations, we |
|
687 | 687 | # consider it not divergent. For example, if side 1 copies 'a' |
|
688 | 688 | # to 'b' and 'c' and deletes 'a', and side 2 copies 'a' to 'c' |
|
689 | 689 | # and 'd' and deletes 'a'. |
|
690 | 690 | if dsts1 & dsts2: |
|
691 | 691 | for dst in dsts1 & dsts2: |
|
692 | 692 | copy1[dst] = src |
|
693 | 693 | copy2[dst] = src |
|
694 | 694 | else: |
|
695 | 695 | diverge[src] = sorted(dsts1 | dsts2) |
|
696 | 696 | elif src in m1 and src in m2: |
|
697 | 697 | # copied on both sides |
|
698 | 698 | dsts1 = set(dsts1) |
|
699 | 699 | dsts2 = set(dsts2) |
|
700 | 700 | for dst in dsts1 & dsts2: |
|
701 | 701 | copy1[dst] = src |
|
702 | 702 | copy2[dst] = src |
|
703 | 703 | # TODO: Handle cases where it was renamed on one side and copied |
|
704 | 704 | # on the other side |
|
705 | 705 | elif dsts1: |
|
706 | 706 | # copied/renamed only on side 1 |
|
707 | 707 | _checksinglesidecopies( |
|
708 | 708 | src, dsts1, m1, m2, mb, c2, base, copy1, renamedelete1 |
|
709 | 709 | ) |
|
710 | 710 | elif dsts2: |
|
711 | 711 | # copied/renamed only on side 2 |
|
712 | 712 | _checksinglesidecopies( |
|
713 | 713 | src, dsts2, m2, m1, mb, c1, base, copy2, renamedelete2 |
|
714 | 714 | ) |
|
715 | 715 | |
|
716 | 716 | # find interesting file sets from manifests |
|
717 | 717 | addedinm1 = m1.filesnotin(mb, repo.narrowmatch()) |
|
718 | 718 | addedinm2 = m2.filesnotin(mb, repo.narrowmatch()) |
|
719 | 719 | u1 = sorted(addedinm1 - addedinm2) |
|
720 | 720 | u2 = sorted(addedinm2 - addedinm1) |
|
721 | 721 | |
|
722 | 722 | header = b" unmatched files in %s" |
|
723 | 723 | if u1: |
|
724 | 724 | repo.ui.debug(b"%s:\n %s\n" % (header % b'local', b"\n ".join(u1))) |
|
725 | 725 | if u2: |
|
726 | 726 | repo.ui.debug(b"%s:\n %s\n" % (header % b'other', b"\n ".join(u2))) |
|
727 | 727 | |
|
728 | 728 | if repo.ui.debugflag: |
|
729 | 729 | renamedeleteset = set() |
|
730 | 730 | divergeset = set() |
|
731 | 731 | for dsts in diverge.values(): |
|
732 | 732 | divergeset.update(dsts) |
|
733 | 733 | for dsts in renamedelete1.values(): |
|
734 | 734 | renamedeleteset.update(dsts) |
|
735 | 735 | for dsts in renamedelete2.values(): |
|
736 | 736 | renamedeleteset.update(dsts) |
|
737 | 737 | |
|
738 | 738 | repo.ui.debug( |
|
739 | 739 | b" all copies found (* = to merge, ! = divergent, " |
|
740 | 740 | b"% = renamed and deleted):\n" |
|
741 | 741 | ) |
|
742 | 742 | for side, copies in ((b"local", copies1), (b"remote", copies2)): |
|
743 | 743 | if not copies: |
|
744 | 744 | continue |
|
745 | 745 | repo.ui.debug(b" on %s side:\n" % side) |
|
746 | 746 | for f in sorted(copies): |
|
747 | 747 | note = b"" |
|
748 | 748 | if f in copy1 or f in copy2: |
|
749 | 749 | note += b"*" |
|
750 | 750 | if f in divergeset: |
|
751 | 751 | note += b"!" |
|
752 | 752 | if f in renamedeleteset: |
|
753 | 753 | note += b"%" |
|
754 | 754 | repo.ui.debug( |
|
755 | 755 | b" src: '%s' -> dst: '%s' %s\n" % (copies[f], f, note) |
|
756 | 756 | ) |
|
757 | 757 | del renamedeleteset |
|
758 | 758 | del divergeset |
|
759 | 759 | |
|
760 | 760 | repo.ui.debug(b" checking for directory renames\n") |
|
761 | 761 | |
|
762 | 762 | dirmove1, movewithdir2 = _dir_renames(repo, c1, copy1, copies1, u2) |
|
763 | 763 | dirmove2, movewithdir1 = _dir_renames(repo, c2, copy2, copies2, u1) |
|
764 | 764 | |
|
765 | 765 | branch_copies1 = branch_copies(copy1, renamedelete1, dirmove1, movewithdir1) |
|
766 | 766 | branch_copies2 = branch_copies(copy2, renamedelete2, dirmove2, movewithdir2) |
|
767 | 767 | |
|
768 | 768 | return branch_copies1, branch_copies2, diverge |
|
769 | 769 | |
|
770 | 770 | |
|
771 | 771 | def _dir_renames(repo, ctx, copy, fullcopy, addedfiles): |
|
772 | 772 | """Finds moved directories and files that should move with them. |
|
773 | 773 | |
|
774 | 774 | ctx: the context for one of the sides |
|
775 | 775 | copy: files copied on the same side (as ctx) |
|
776 | 776 | fullcopy: files copied on the same side (as ctx), including those that |
|
777 | 777 | merge.manifestmerge() won't care about |
|
778 | 778 | addedfiles: added files on the other side (compared to ctx) |
|
779 | 779 | """ |
|
780 | 780 | # generate a directory move map |
|
781 | 781 | d = ctx.dirs() |
|
782 | 782 | invalid = set() |
|
783 | 783 | dirmove = {} |
|
784 | 784 | |
|
785 | 785 | # examine each file copy for a potential directory move, which is |
|
786 | 786 | # when all the files in a directory are moved to a new directory |
|
787 | 787 | for dst, src in pycompat.iteritems(fullcopy): |
|
788 | 788 | dsrc, ddst = pathutil.dirname(src), pathutil.dirname(dst) |
|
789 | 789 | if dsrc in invalid: |
|
790 | 790 | # already seen to be uninteresting |
|
791 | 791 | continue |
|
792 | 792 | elif dsrc in d and ddst in d: |
|
793 | 793 | # directory wasn't entirely moved locally |
|
794 | 794 | invalid.add(dsrc) |
|
795 | 795 | elif dsrc in dirmove and dirmove[dsrc] != ddst: |
|
796 | 796 | # files from the same directory moved to two different places |
|
797 | 797 | invalid.add(dsrc) |
|
798 | 798 | else: |
|
799 | 799 | # looks good so far |
|
800 | 800 | dirmove[dsrc] = ddst |
|
801 | 801 | |
|
802 | 802 | for i in invalid: |
|
803 | 803 | if i in dirmove: |
|
804 | 804 | del dirmove[i] |
|
805 | 805 | del d, invalid |
|
806 | 806 | |
|
807 | 807 | if not dirmove: |
|
808 | 808 | return {}, {} |
|
809 | 809 | |
|
810 | 810 | dirmove = {k + b"/": v + b"/" for k, v in pycompat.iteritems(dirmove)} |
|
811 | 811 | |
|
812 | 812 | for d in dirmove: |
|
813 | 813 | repo.ui.debug( |
|
814 | 814 | b" discovered dir src: '%s' -> dst: '%s'\n" % (d, dirmove[d]) |
|
815 | 815 | ) |
|
816 | 816 | |
|
817 | 817 | movewithdir = {} |
|
818 | 818 | # check unaccounted nonoverlapping files against directory moves |
|
819 | 819 | for f in addedfiles: |
|
820 | 820 | if f not in fullcopy: |
|
821 | 821 | for d in dirmove: |
|
822 | 822 | if f.startswith(d): |
|
823 | 823 | # new file added in a directory that was moved, move it |
|
824 | 824 | df = dirmove[d] + f[len(d) :] |
|
825 | 825 | if df not in copy: |
|
826 | 826 | movewithdir[f] = df |
|
827 | 827 | repo.ui.debug( |
|
828 | 828 | b" pending file src: '%s' -> dst: '%s'\n" |
|
829 | 829 | % (f, df) |
|
830 | 830 | ) |
|
831 | 831 | break |
|
832 | 832 | |
|
833 | 833 | return dirmove, movewithdir |
|
834 | 834 | |
|
835 | 835 | |
|
836 | 836 | def _heuristicscopytracing(repo, c1, c2, base): |
|
837 | 837 | """ Fast copytracing using filename heuristics |
|
838 | 838 | |
|
839 | 839 | Assumes that moves or renames are of following two types: |
|
840 | 840 | |
|
841 | 841 | 1) Inside a directory only (same directory name but different filenames) |
|
842 | 842 | 2) Move from one directory to another |
|
843 | 843 | (same filenames but different directory names) |
|
844 | 844 | |
|
845 | 845 | Works only when there are no merge commits in the "source branch". |
|
846 | 846 | Source branch is commits from base up to c2 not including base. |
|
847 | 847 | |
|
848 | 848 | If merge is involved it fallbacks to _fullcopytracing(). |
|
849 | 849 | |
|
850 | 850 | Can be used by setting the following config: |
|
851 | 851 | |
|
852 | 852 | [experimental] |
|
853 | 853 | copytrace = heuristics |
|
854 | 854 | |
|
855 | 855 | In some cases the copy/move candidates found by heuristics can be very large |
|
856 | 856 | in number and that will make the algorithm slow. The number of possible |
|
857 | 857 | candidates to check can be limited by using the config |
|
858 | 858 | `experimental.copytrace.movecandidateslimit` which defaults to 100. |
|
859 | 859 | """ |
|
860 | 860 | |
|
861 | 861 | if c1.rev() is None: |
|
862 | 862 | c1 = c1.p1() |
|
863 | 863 | if c2.rev() is None: |
|
864 | 864 | c2 = c2.p1() |
|
865 | 865 | |
|
866 | 866 | changedfiles = set() |
|
867 | 867 | m1 = c1.manifest() |
|
868 | 868 | if not repo.revs(b'%d::%d', base.rev(), c2.rev()): |
|
869 | 869 | # If base is not in c2 branch, we switch to fullcopytracing |
|
870 | 870 | repo.ui.debug( |
|
871 | 871 | b"switching to full copytracing as base is not " |
|
872 | 872 | b"an ancestor of c2\n" |
|
873 | 873 | ) |
|
874 | 874 | return _fullcopytracing(repo, c1, c2, base) |
|
875 | 875 | |
|
876 | 876 | ctx = c2 |
|
877 | 877 | while ctx != base: |
|
878 | 878 | if len(ctx.parents()) == 2: |
|
879 | 879 | # To keep things simple let's not handle merges |
|
880 | 880 | repo.ui.debug(b"switching to full copytracing because of merges\n") |
|
881 | 881 | return _fullcopytracing(repo, c1, c2, base) |
|
882 | 882 | changedfiles.update(ctx.files()) |
|
883 | 883 | ctx = ctx.p1() |
|
884 | 884 | |
|
885 | 885 | copies2 = {} |
|
886 | 886 | cp = _forwardcopies(base, c2) |
|
887 | 887 | for dst, src in pycompat.iteritems(cp): |
|
888 | 888 | if src in m1: |
|
889 | 889 | copies2[dst] = src |
|
890 | 890 | |
|
891 | 891 | # file is missing if it isn't present in the destination, but is present in |
|
892 | 892 | # the base and present in the source. |
|
893 | 893 | # Presence in the base is important to exclude added files, presence in the |
|
894 | 894 | # source is important to exclude removed files. |
|
895 | 895 | filt = lambda f: f not in m1 and f in base and f in c2 |
|
896 | 896 | missingfiles = [f for f in changedfiles if filt(f)] |
|
897 | 897 | |
|
898 | 898 | copies1 = {} |
|
899 | 899 | if missingfiles: |
|
900 | 900 | basenametofilename = collections.defaultdict(list) |
|
901 | 901 | dirnametofilename = collections.defaultdict(list) |
|
902 | 902 | |
|
903 | 903 | for f in m1.filesnotin(base.manifest()): |
|
904 | 904 | basename = os.path.basename(f) |
|
905 | 905 | dirname = os.path.dirname(f) |
|
906 | 906 | basenametofilename[basename].append(f) |
|
907 | 907 | dirnametofilename[dirname].append(f) |
|
908 | 908 | |
|
909 | 909 | for f in missingfiles: |
|
910 | 910 | basename = os.path.basename(f) |
|
911 | 911 | dirname = os.path.dirname(f) |
|
912 | 912 | samebasename = basenametofilename[basename] |
|
913 | 913 | samedirname = dirnametofilename[dirname] |
|
914 | 914 | movecandidates = samebasename + samedirname |
|
915 | 915 | # f is guaranteed to be present in c2, that's why |
|
916 | 916 | # c2.filectx(f) won't fail |
|
917 | 917 | f2 = c2.filectx(f) |
|
918 | 918 | # we can have a lot of candidates which can slow down the heuristics |
|
919 | 919 | # config value to limit the number of candidates moves to check |
|
920 | 920 | maxcandidates = repo.ui.configint( |
|
921 | 921 | b'experimental', b'copytrace.movecandidateslimit' |
|
922 | 922 | ) |
|
923 | 923 | |
|
924 | 924 | if len(movecandidates) > maxcandidates: |
|
925 | 925 | repo.ui.status( |
|
926 | 926 | _( |
|
927 | 927 | b"skipping copytracing for '%s', more " |
|
928 | 928 | b"candidates than the limit: %d\n" |
|
929 | 929 | ) |
|
930 | 930 | % (f, len(movecandidates)) |
|
931 | 931 | ) |
|
932 | 932 | continue |
|
933 | 933 | |
|
934 | 934 | for candidate in movecandidates: |
|
935 | 935 | f1 = c1.filectx(candidate) |
|
936 | 936 | if _related(f1, f2): |
|
937 | 937 | # if there are a few related copies then we'll merge |
|
938 | 938 | # changes into all of them. This matches the behaviour |
|
939 | 939 | # of upstream copytracing |
|
940 | 940 | copies1[candidate] = f |
|
941 | 941 | |
|
942 | 942 | return branch_copies(copies1), branch_copies(copies2), {} |
|
943 | 943 | |
|
944 | 944 | |
|
945 | 945 | def _related(f1, f2): |
|
946 | 946 | """return True if f1 and f2 filectx have a common ancestor |
|
947 | 947 | |
|
948 | 948 | Walk back to common ancestor to see if the two files originate |
|
949 | 949 | from the same file. Since workingfilectx's rev() is None it messes |
|
950 | 950 | up the integer comparison logic, hence the pre-step check for |
|
951 | 951 | None (f1 and f2 can only be workingfilectx's initially). |
|
952 | 952 | """ |
|
953 | 953 | |
|
954 | 954 | if f1 == f2: |
|
955 | 955 | return True # a match |
|
956 | 956 | |
|
957 | 957 | g1, g2 = f1.ancestors(), f2.ancestors() |
|
958 | 958 | try: |
|
959 | 959 | f1r, f2r = f1.linkrev(), f2.linkrev() |
|
960 | 960 | |
|
961 | 961 | if f1r is None: |
|
962 | 962 | f1 = next(g1) |
|
963 | 963 | if f2r is None: |
|
964 | 964 | f2 = next(g2) |
|
965 | 965 | |
|
966 | 966 | while True: |
|
967 | 967 | f1r, f2r = f1.linkrev(), f2.linkrev() |
|
968 | 968 | if f1r > f2r: |
|
969 | 969 | f1 = next(g1) |
|
970 | 970 | elif f2r > f1r: |
|
971 | 971 | f2 = next(g2) |
|
972 | 972 | else: # f1 and f2 point to files in the same linkrev |
|
973 | 973 | return f1 == f2 # true if they point to the same file |
|
974 | 974 | except StopIteration: |
|
975 | 975 | return False |
|
976 | 976 | |
|
977 | 977 | |
|
978 | 978 | def graftcopies(wctx, ctx, base): |
|
979 | 979 | """reproduce copies between base and ctx in the wctx |
|
980 | 980 | |
|
981 | 981 | Unlike mergecopies(), this function will only consider copies between base |
|
982 | 982 | and ctx; it will ignore copies between base and wctx. Also unlike |
|
983 | 983 | mergecopies(), this function will apply copies to the working copy (instead |
|
984 | 984 | of just returning information about the copies). That makes it cheaper |
|
985 | 985 | (especially in the common case of base==ctx.p1()) and useful also when |
|
986 | 986 | experimental.copytrace=off. |
|
987 | 987 | |
|
988 | 988 | merge.update() will have already marked most copies, but it will only |
|
989 | 989 | mark copies if it thinks the source files are related (see |
|
990 | 990 | merge._related()). It will also not mark copies if the file wasn't modified |
|
991 | 991 | on the local side. This function adds the copies that were "missed" |
|
992 | 992 | by merge.update(). |
|
993 | 993 | """ |
|
994 | 994 | new_copies = pathcopies(base, ctx) |
|
995 | 995 | _filter(wctx.p1(), wctx, new_copies) |
|
996 | 996 | for dst, src in pycompat.iteritems(new_copies): |
|
997 | 997 | wctx[dst].markcopied(src) |
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