Mercurial > hg
annotate mercurial/copies.py @ 44940:4c1d39215034
metadata: move computation related to files touched in a dedicated module
This was suggested by Yuya Nishihara a while back. Since I am about to add more
metadata related computation, lets create a new repositories.
Differential Revision: https://phab.mercurial-scm.org/D8587
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Wed, 27 May 2020 12:26:08 +0200 |
parents | 61719b9658b1 |
children | cfd06649a1b8 |
rev | line source |
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1 # copies.py - copy detection for Mercurial |
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2 # |
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3 # Copyright 2008 Matt Mackall <mpm@selenic.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 from __future__ import absolute_import |
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9 |
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10 import collections |
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11 import os |
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12 |
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13 from .i18n import _ |
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14 |
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15 |
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16 from .revlogutils.flagutil import REVIDX_SIDEDATA |
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17 |
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18 from . import ( |
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19 match as matchmod, |
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20 node, |
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21 pathutil, |
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22 pycompat, |
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23 util, |
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24 ) |
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25 |
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26 |
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27 from .utils import stringutil |
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28 |
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29 |
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30 def _filter(src, dst, t): |
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31 """filters out invalid copies after chaining""" |
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32 |
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33 # When _chain()'ing copies in 'a' (from 'src' via some other commit 'mid') |
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34 # with copies in 'b' (from 'mid' to 'dst'), we can get the different cases |
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35 # in the following table (not including trivial cases). For example, case 2 |
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36 # is where a file existed in 'src' and remained under that name in 'mid' and |
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37 # then was renamed between 'mid' and 'dst'. |
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38 # |
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39 # case src mid dst result |
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40 # 1 x y - - |
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41 # 2 x y y x->y |
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42 # 3 x y x - |
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43 # 4 x y z x->z |
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44 # 5 - x y - |
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45 # 6 x x y x->y |
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46 # |
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47 # _chain() takes care of chaining the copies in 'a' and 'b', but it |
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48 # cannot tell the difference between cases 1 and 2, between 3 and 4, or |
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49 # between 5 and 6, so it includes all cases in its result. |
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50 # Cases 1, 3, and 5 are then removed by _filter(). |
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51 |
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52 for k, v in list(t.items()): |
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53 # remove copies from files that didn't exist |
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54 if v not in src: |
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55 del t[k] |
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56 # remove criss-crossed copies |
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57 elif k in src and v in dst: |
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58 del t[k] |
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59 # remove copies to files that were then removed |
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60 elif k not in dst: |
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61 del t[k] |
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62 |
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63 |
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64 def _chain(prefix, suffix): |
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65 """chain two sets of copies 'prefix' and 'suffix'""" |
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66 result = prefix.copy() |
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67 for key, value in pycompat.iteritems(suffix): |
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68 result[key] = prefix.get(value, value) |
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69 return result |
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70 |
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71 |
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72 def _tracefile(fctx, am, basemf): |
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73 """return file context that is the ancestor of fctx present in ancestor |
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74 manifest am |
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75 |
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76 Note: we used to try and stop after a given limit, however checking if that |
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77 limit is reached turned out to be very expensive. we are better off |
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78 disabling that feature.""" |
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79 |
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80 for f in fctx.ancestors(): |
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81 path = f.path() |
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82 if am.get(path, None) == f.filenode(): |
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83 return path |
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84 if basemf and basemf.get(path, None) == f.filenode(): |
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85 return path |
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86 |
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87 |
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88 def _dirstatecopies(repo, match=None): |
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89 ds = repo.dirstate |
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90 c = ds.copies().copy() |
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91 for k in list(c): |
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92 if ds[k] not in b'anm' or (match and not match(k)): |
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93 del c[k] |
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94 return c |
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95 |
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96 |
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97 def _computeforwardmissing(a, b, match=None): |
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98 """Computes which files are in b but not a. |
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99 This is its own function so extensions can easily wrap this call to see what |
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100 files _forwardcopies is about to process. |
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101 """ |
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102 ma = a.manifest() |
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103 mb = b.manifest() |
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104 return mb.filesnotin(ma, match=match) |
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105 |
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106 |
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107 def usechangesetcentricalgo(repo): |
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108 """Checks if we should use changeset-centric copy algorithms""" |
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109 if repo.filecopiesmode == b'changeset-sidedata': |
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110 return True |
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111 readfrom = repo.ui.config(b'experimental', b'copies.read-from') |
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112 changesetsource = (b'changeset-only', b'compatibility') |
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113 return readfrom in changesetsource |
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114 |
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115 |
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116 def _committedforwardcopies(a, b, base, match): |
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117 """Like _forwardcopies(), but b.rev() cannot be None (working copy)""" |
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118 # files might have to be traced back to the fctx parent of the last |
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119 # one-side-only changeset, but not further back than that |
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120 repo = a._repo |
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121 |
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122 if usechangesetcentricalgo(repo): |
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123 return _changesetforwardcopies(a, b, match) |
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124 |
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125 debug = repo.ui.debugflag and repo.ui.configbool(b'devel', b'debug.copies') |
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126 dbg = repo.ui.debug |
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127 if debug: |
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128 dbg(b'debug.copies: looking into rename from %s to %s\n' % (a, b)) |
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129 am = a.manifest() |
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130 basemf = None if base is None else base.manifest() |
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131 |
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132 # find where new files came from |
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133 # we currently don't try to find where old files went, too expensive |
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134 # this means we can miss a case like 'hg rm b; hg cp a b' |
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135 cm = {} |
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136 |
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137 # Computing the forward missing is quite expensive on large manifests, since |
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138 # it compares the entire manifests. We can optimize it in the common use |
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139 # case of computing what copies are in a commit versus its parent (like |
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140 # during a rebase or histedit). Note, we exclude merge commits from this |
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141 # optimization, since the ctx.files() for a merge commit is not correct for |
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142 # this comparison. |
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143 forwardmissingmatch = match |
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144 if b.p1() == a and b.p2().node() == node.nullid: |
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145 filesmatcher = matchmod.exact(b.files()) |
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146 forwardmissingmatch = matchmod.intersectmatchers(match, filesmatcher) |
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147 missing = _computeforwardmissing(a, b, match=forwardmissingmatch) |
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148 |
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149 ancestrycontext = a._repo.changelog.ancestors([b.rev()], inclusive=True) |
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150 |
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151 if debug: |
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152 dbg(b'debug.copies: missing files to search: %d\n' % len(missing)) |
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153 |
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154 for f in sorted(missing): |
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155 if debug: |
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156 dbg(b'debug.copies: tracing file: %s\n' % f) |
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157 fctx = b[f] |
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158 fctx._ancestrycontext = ancestrycontext |
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159 |
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160 if debug: |
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161 start = util.timer() |
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162 opath = _tracefile(fctx, am, basemf) |
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163 if opath: |
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164 if debug: |
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165 dbg(b'debug.copies: rename of: %s\n' % opath) |
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166 cm[f] = opath |
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167 if debug: |
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168 dbg( |
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169 b'debug.copies: time: %f seconds\n' |
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170 % (util.timer() - start) |
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171 ) |
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172 return cm |
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173 |
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174 |
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175 def _revinfogetter(repo): |
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176 """return a function that return multiple data given a <rev>"i |
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177 |
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178 * p1: revision number of first parent |
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179 * p2: revision number of first parent |
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180 * p1copies: mapping of copies from p1 |
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181 * p2copies: mapping of copies from p2 |
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182 * removed: a list of removed files |
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183 * ismerged: a callback to know if file was merged in that revision |
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184 """ |
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185 cl = repo.changelog |
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186 parents = cl.parentrevs |
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187 |
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188 def get_ismerged(rev): |
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189 ctx = repo[rev] |
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190 |
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191 def ismerged(path): |
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192 if path not in ctx.files(): |
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193 return False |
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194 fctx = ctx[path] |
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195 parents = fctx._filelog.parents(fctx._filenode) |
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196 nb_parents = 0 |
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197 for n in parents: |
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198 if n != node.nullid: |
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199 nb_parents += 1 |
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200 return nb_parents >= 2 |
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201 |
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202 return ismerged |
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203 |
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204 if repo.filecopiesmode == b'changeset-sidedata': |
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205 changelogrevision = cl.changelogrevision |
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206 flags = cl.flags |
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207 |
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208 # A small cache to avoid doing the work twice for merges |
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209 # |
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210 # In the vast majority of cases, if we ask information for a revision |
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211 # about 1 parent, we'll later ask it for the other. So it make sense to |
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212 # keep the information around when reaching the first parent of a merge |
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213 # and dropping it after it was provided for the second parents. |
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214 # |
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215 # It exists cases were only one parent of the merge will be walked. It |
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216 # happens when the "destination" the copy tracing is descendant from a |
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217 # new root, not common with the "source". In that case, we will only walk |
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218 # through merge parents that are descendant of changesets common |
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219 # between "source" and "destination". |
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220 # |
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221 # With the current case implementation if such changesets have a copy |
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222 # information, we'll keep them in memory until the end of |
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223 # _changesetforwardcopies. We don't expect the case to be frequent |
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224 # enough to matters. |
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225 # |
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226 # In addition, it would be possible to reach pathological case, were |
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227 # many first parent are met before any second parent is reached. In |
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228 # that case the cache could grow. If this even become an issue one can |
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229 # safely introduce a maximum cache size. This would trade extra CPU/IO |
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230 # time to save memory. |
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231 merge_caches = {} |
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232 |
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233 def revinfo(rev): |
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234 p1, p2 = parents(rev) |
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235 value = None |
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236 if flags(rev) & REVIDX_SIDEDATA: |
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237 e = merge_caches.pop(rev, None) |
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238 if e is not None: |
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239 return e |
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240 c = changelogrevision(rev) |
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241 p1copies = c.p1copies |
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242 p2copies = c.p2copies |
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243 removed = c.filesremoved |
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244 if p1 != node.nullrev and p2 != node.nullrev: |
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245 # XXX some case we over cache, IGNORE |
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246 value = merge_caches[rev] = ( |
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247 p1, |
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248 p2, |
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249 p1copies, |
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250 p2copies, |
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251 removed, |
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252 get_ismerged(rev), |
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253 ) |
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254 else: |
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255 p1copies = {} |
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256 p2copies = {} |
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257 removed = [] |
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258 |
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259 if value is None: |
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260 value = (p1, p2, p1copies, p2copies, removed, get_ismerged(rev)) |
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261 return value |
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262 |
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263 else: |
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264 |
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265 def revinfo(rev): |
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266 p1, p2 = parents(rev) |
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267 ctx = repo[rev] |
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268 p1copies, p2copies = ctx._copies |
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269 removed = ctx.filesremoved() |
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270 return p1, p2, p1copies, p2copies, removed, get_ismerged(rev) |
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271 |
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272 return revinfo |
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273 |
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274 |
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275 def _changesetforwardcopies(a, b, match): |
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276 if a.rev() in (node.nullrev, b.rev()): |
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277 return {} |
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278 |
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279 repo = a.repo().unfiltered() |
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280 children = {} |
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281 revinfo = _revinfogetter(repo) |
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282 |
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283 cl = repo.changelog |
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284 isancestor = cl.isancestorrev # XXX we should had chaching to this. |
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285 missingrevs = cl.findmissingrevs(common=[a.rev()], heads=[b.rev()]) |
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286 mrset = set(missingrevs) |
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287 roots = set() |
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288 for r in missingrevs: |
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289 for p in cl.parentrevs(r): |
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290 if p == node.nullrev: |
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291 continue |
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292 if p not in children: |
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293 children[p] = [r] |
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294 else: |
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295 children[p].append(r) |
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296 if p not in mrset: |
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297 roots.add(p) |
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298 if not roots: |
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299 # no common revision to track copies from |
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300 return {} |
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301 min_root = min(roots) |
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302 |
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303 from_head = set( |
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304 cl.reachableroots(min_root, [b.rev()], list(roots), includepath=True) |
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305 ) |
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306 |
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307 iterrevs = set(from_head) |
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308 iterrevs &= mrset |
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309 iterrevs.update(roots) |
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310 iterrevs.remove(b.rev()) |
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311 revs = sorted(iterrevs) |
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312 return _combinechangesetcopies( |
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313 revs, children, b.rev(), revinfo, match, isancestor |
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314 ) |
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315 |
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316 |
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317 def _combinechangesetcopies( |
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318 revs, children, targetrev, revinfo, match, isancestor |
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319 ): |
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320 """combine the copies information for each item of iterrevs |
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321 |
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322 revs: sorted iterable of revision to visit |
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323 children: a {parent: [children]} mapping. |
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324 targetrev: the final copies destination revision (not in iterrevs) |
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325 revinfo(rev): a function that return (p1, p2, p1copies, p2copies, removed) |
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326 match: a matcher |
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327 |
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328 It returns the aggregated copies information for `targetrev`. |
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329 """ |
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330 all_copies = {} |
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331 alwaysmatch = match.always() |
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332 for r in revs: |
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333 copies = all_copies.pop(r, None) |
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334 if copies is None: |
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335 # this is a root |
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336 copies = {} |
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337 for i, c in enumerate(children[r]): |
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338 p1, p2, p1copies, p2copies, removed, ismerged = revinfo(c) |
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339 if r == p1: |
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340 parent = 1 |
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341 childcopies = p1copies |
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342 else: |
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343 assert r == p2 |
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344 parent = 2 |
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345 childcopies = p2copies |
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346 if not alwaysmatch: |
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347 childcopies = { |
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348 dst: src for dst, src in childcopies.items() if match(dst) |
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349 } |
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350 newcopies = copies |
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351 if childcopies: |
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352 newcopies = copies.copy() |
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353 for dest, source in pycompat.iteritems(childcopies): |
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354 prev = copies.get(source) |
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355 if prev is not None and prev[1] is not None: |
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356 source = prev[1] |
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357 newcopies[dest] = (c, source) |
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358 assert newcopies is not copies |
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359 for f in removed: |
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360 if f in newcopies: |
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361 if newcopies is copies: |
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362 # copy on write to avoid affecting potential other |
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363 # branches. when there are no other branches, this |
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364 # could be avoided. |
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365 newcopies = copies.copy() |
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366 newcopies[f] = (c, None) |
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367 othercopies = all_copies.get(c) |
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368 if othercopies is None: |
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369 all_copies[c] = newcopies |
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370 else: |
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371 # we are the second parent to work on c, we need to merge our |
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372 # work with the other. |
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373 # |
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374 # In case of conflict, parent 1 take precedence over parent 2. |
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375 # This is an arbitrary choice made anew when implementing |
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376 # changeset based copies. It was made without regards with |
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377 # potential filelog related behavior. |
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378 if parent == 1: |
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379 _merge_copies_dict( |
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380 othercopies, newcopies, isancestor, ismerged |
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381 ) |
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382 else: |
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383 _merge_copies_dict( |
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384 newcopies, othercopies, isancestor, ismerged |
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385 ) |
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386 all_copies[c] = newcopies |
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387 |
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388 final_copies = {} |
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389 for dest, (tt, source) in all_copies[targetrev].items(): |
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390 if source is not None: |
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391 final_copies[dest] = source |
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392 return final_copies |
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393 |
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394 |
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395 def _merge_copies_dict(minor, major, isancestor, ismerged): |
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396 """merge two copies-mapping together, minor and major |
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397 |
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398 In case of conflict, value from "major" will be picked. |
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399 |
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400 - `isancestors(low_rev, high_rev)`: callable return True if `low_rev` is an |
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401 ancestors of `high_rev`, |
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402 |
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403 - `ismerged(path)`: callable return True if `path` have been merged in the |
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404 current revision, |
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405 """ |
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406 for dest, value in major.items(): |
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407 other = minor.get(dest) |
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408 if other is None: |
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409 minor[dest] = value |
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410 else: |
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411 new_tt = value[0] |
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412 other_tt = other[0] |
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413 if value[1] == other[1]: |
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414 continue |
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415 # content from "major" wins, unless it is older |
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416 # than the branch point or there is a merge |
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417 if ( |
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418 new_tt == other_tt |
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419 or not isancestor(new_tt, other_tt) |
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420 or ismerged(dest) |
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421 ): |
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422 minor[dest] = value |
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423 |
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424 |
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425 def _forwardcopies(a, b, base=None, match=None): |
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426 """find {dst@b: src@a} copy mapping where a is an ancestor of b""" |
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427 |
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428 if base is None: |
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429 base = a |
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430 match = a.repo().narrowmatch(match) |
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431 # check for working copy |
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432 if b.rev() is None: |
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433 cm = _committedforwardcopies(a, b.p1(), base, match) |
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434 # combine copies from dirstate if necessary |
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435 copies = _chain(cm, _dirstatecopies(b._repo, match)) |
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436 else: |
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437 copies = _committedforwardcopies(a, b, base, match) |
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438 return copies |
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439 |
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440 |
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441 def _backwardrenames(a, b, match): |
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442 if a._repo.ui.config(b'experimental', b'copytrace') == b'off': |
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443 return {} |
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444 |
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445 # Even though we're not taking copies into account, 1:n rename situations |
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446 # can still exist (e.g. hg cp a b; hg mv a c). In those cases we |
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447 # arbitrarily pick one of the renames. |
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448 # We don't want to pass in "match" here, since that would filter |
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449 # the destination by it. Since we're reversing the copies, we want |
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450 # to filter the source instead. |
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451 f = _forwardcopies(b, a) |
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452 r = {} |
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453 for k, v in sorted(pycompat.iteritems(f)): |
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454 if match and not match(v): |
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455 continue |
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456 # remove copies |
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457 if v in a: |
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458 continue |
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459 r[v] = k |
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460 return r |
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461 |
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462 |
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463 def pathcopies(x, y, match=None): |
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464 """find {dst@y: src@x} copy mapping for directed compare""" |
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465 repo = x._repo |
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466 debug = repo.ui.debugflag and repo.ui.configbool(b'devel', b'debug.copies') |
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467 if debug: |
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468 repo.ui.debug( |
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469 b'debug.copies: searching copies from %s to %s\n' % (x, y) |
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470 ) |
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471 if x == y or not x or not y: |
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472 return {} |
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473 if y.rev() is None and x == y.p1(): |
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474 if debug: |
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475 repo.ui.debug(b'debug.copies: search mode: dirstate\n') |
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476 # short-circuit to avoid issues with merge states |
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477 return _dirstatecopies(repo, match) |
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478 a = y.ancestor(x) |
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479 if a == x: |
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480 if debug: |
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481 repo.ui.debug(b'debug.copies: search mode: forward\n') |
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482 copies = _forwardcopies(x, y, match=match) |
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483 elif a == y: |
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484 if debug: |
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485 repo.ui.debug(b'debug.copies: search mode: backward\n') |
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486 copies = _backwardrenames(x, y, match=match) |
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487 else: |
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488 if debug: |
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489 repo.ui.debug(b'debug.copies: search mode: combined\n') |
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490 base = None |
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491 if a.rev() != node.nullrev: |
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492 base = x |
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493 copies = _chain( |
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494 _backwardrenames(x, a, match=match), |
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495 _forwardcopies(a, y, base, match=match), |
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496 ) |
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497 _filter(x, y, copies) |
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498 return copies |
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499 |
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500 |
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501 def mergecopies(repo, c1, c2, base): |
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502 """ |
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503 Finds moves and copies between context c1 and c2 that are relevant for |
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504 merging. 'base' will be used as the merge base. |
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505 |
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506 Copytracing is used in commands like rebase, merge, unshelve, etc to merge |
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507 files that were moved/ copied in one merge parent and modified in another. |
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508 For example: |
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509 |
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510 o ---> 4 another commit |
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511 | |
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512 | o ---> 3 commit that modifies a.txt |
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513 | / |
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514 o / ---> 2 commit that moves a.txt to b.txt |
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515 |/ |
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516 o ---> 1 merge base |
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517 |
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518 If we try to rebase revision 3 on revision 4, since there is no a.txt in |
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519 revision 4, and if user have copytrace disabled, we prints the following |
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520 message: |
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521 |
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522 ```other changed <file> which local deleted``` |
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523 |
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524 Returns a tuple where: |
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525 |
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526 "branch_copies" an instance of branch_copies. |
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527 |
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528 "diverge" is a mapping of source name -> list of destination names |
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529 for divergent renames. |
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530 |
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531 This function calls different copytracing algorithms based on config. |
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532 """ |
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533 # avoid silly behavior for update from empty dir |
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534 if not c1 or not c2 or c1 == c2: |
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535 return branch_copies(), branch_copies(), {} |
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536 |
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537 narrowmatch = c1.repo().narrowmatch() |
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538 |
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539 # avoid silly behavior for parent -> working dir |
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540 if c2.node() is None and c1.node() == repo.dirstate.p1(): |
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541 return ( |
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542 branch_copies(_dirstatecopies(repo, narrowmatch)), |
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543 branch_copies(), |
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544 {}, |
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545 ) |
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546 |
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547 copytracing = repo.ui.config(b'experimental', b'copytrace') |
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548 if stringutil.parsebool(copytracing) is False: |
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549 # stringutil.parsebool() returns None when it is unable to parse the |
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550 # value, so we should rely on making sure copytracing is on such cases |
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551 return branch_copies(), branch_copies(), {} |
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552 |
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553 if usechangesetcentricalgo(repo): |
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554 # The heuristics don't make sense when we need changeset-centric algos |
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555 return _fullcopytracing(repo, c1, c2, base) |
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556 |
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557 # Copy trace disabling is explicitly below the node == p1 logic above |
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558 # because the logic above is required for a simple copy to be kept across a |
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559 # rebase. |
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560 if copytracing == b'heuristics': |
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561 # Do full copytracing if only non-public revisions are involved as |
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562 # that will be fast enough and will also cover the copies which could |
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563 # be missed by heuristics |
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564 if _isfullcopytraceable(repo, c1, base): |
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565 return _fullcopytracing(repo, c1, c2, base) |
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566 return _heuristicscopytracing(repo, c1, c2, base) |
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567 else: |
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568 return _fullcopytracing(repo, c1, c2, base) |
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569 |
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570 |
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571 def _isfullcopytraceable(repo, c1, base): |
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572 """ Checks that if base, source and destination are all no-public branches, |
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573 if yes let's use the full copytrace algorithm for increased capabilities |
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574 since it will be fast enough. |
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575 |
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576 `experimental.copytrace.sourcecommitlimit` can be used to set a limit for |
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577 number of changesets from c1 to base such that if number of changesets are |
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578 more than the limit, full copytracing algorithm won't be used. |
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579 """ |
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580 if c1.rev() is None: |
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581 c1 = c1.p1() |
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582 if c1.mutable() and base.mutable(): |
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583 sourcecommitlimit = repo.ui.configint( |
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584 b'experimental', b'copytrace.sourcecommitlimit' |
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585 ) |
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586 commits = len(repo.revs(b'%d::%d', base.rev(), c1.rev())) |
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587 return commits < sourcecommitlimit |
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588 return False |
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589 |
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590 |
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591 def _checksinglesidecopies( |
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592 src, dsts1, m1, m2, mb, c2, base, copy, renamedelete |
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593 ): |
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594 if src not in m2: |
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595 # deleted on side 2 |
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596 if src not in m1: |
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597 # renamed on side 1, deleted on side 2 |
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598 renamedelete[src] = dsts1 |
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599 elif src not in mb: |
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600 # Work around the "short-circuit to avoid issues with merge states" |
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601 # thing in pathcopies(): pathcopies(x, y) can return a copy where the |
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602 # destination doesn't exist in y. |
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|
603 pass |
44909
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44276
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604 elif mb[src] != m2[src] and not _related(c2[src], base[src]): |
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605 return |
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606 elif mb[src] != m2[src] or mb.flags(src) != m2.flags(src): |
42222
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607 # modified on side 2 |
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|
608 for dst in dsts1: |
44237
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diff
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|
609 copy[dst] = src |
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610 |
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611 |
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612 class branch_copies(object): |
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613 """Information about copies made on one side of a merge/graft. |
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614 |
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615 "copy" is a mapping from destination name -> source name, |
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616 where source is in c1 and destination is in c2 or vice-versa. |
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617 |
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618 "movewithdir" is a mapping from source name -> destination name, |
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|
619 where the file at source present in one context but not the other |
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620 needs to be moved to destination by the merge process, because the |
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|
621 other context moved the directory it is in. |
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622 |
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623 "renamedelete" is a mapping of source name -> list of destination |
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624 names for files deleted in c1 that were renamed in c2 or vice-versa. |
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625 |
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626 "dirmove" is a mapping of detected source dir -> destination dir renames. |
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627 This is needed for handling changes to new files previously grafted into |
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|
628 renamed directories. |
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|
629 """ |
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630 |
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631 def __init__( |
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632 self, copy=None, renamedelete=None, dirmove=None, movewithdir=None |
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633 ): |
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634 self.copy = {} if copy is None else copy |
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635 self.renamedelete = {} if renamedelete is None else renamedelete |
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636 self.dirmove = {} if dirmove is None else dirmove |
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637 self.movewithdir = {} if movewithdir is None else movewithdir |
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638 |
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|
639 |
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640 def _fullcopytracing(repo, c1, c2, base): |
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641 """ The full copytracing algorithm which finds all the new files that were |
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|
642 added from merge base up to the top commit and for each file it checks if |
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643 this file was copied from another file. |
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644 |
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|
645 This is pretty slow when a lot of changesets are involved but will track all |
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646 the copies. |
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647 """ |
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648 m1 = c1.manifest() |
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649 m2 = c2.manifest() |
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650 mb = base.manifest() |
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651 |
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652 copies1 = pathcopies(base, c1) |
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653 copies2 = pathcopies(base, c2) |
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654 |
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655 if not (copies1 or copies2): |
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656 return branch_copies(), branch_copies(), {} |
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657 |
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658 inversecopies1 = {} |
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659 inversecopies2 = {} |
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660 for dst, src in copies1.items(): |
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661 inversecopies1.setdefault(src, []).append(dst) |
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662 for dst, src in copies2.items(): |
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663 inversecopies2.setdefault(src, []).append(dst) |
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664 |
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665 copy1 = {} |
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666 copy2 = {} |
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667 diverge = {} |
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668 renamedelete1 = {} |
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669 renamedelete2 = {} |
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670 allsources = set(inversecopies1) | set(inversecopies2) |
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671 for src in allsources: |
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672 dsts1 = inversecopies1.get(src) |
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673 dsts2 = inversecopies2.get(src) |
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674 if dsts1 and dsts2: |
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675 # copied/renamed on both sides |
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676 if src not in m1 and src not in m2: |
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677 # renamed on both sides |
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678 dsts1 = set(dsts1) |
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679 dsts2 = set(dsts2) |
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680 # If there's some overlap in the rename destinations, we |
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681 # consider it not divergent. For example, if side 1 copies 'a' |
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682 # to 'b' and 'c' and deletes 'a', and side 2 copies 'a' to 'c' |
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683 # and 'd' and deletes 'a'. |
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684 if dsts1 & dsts2: |
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|
685 for dst in dsts1 & dsts2: |
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686 copy1[dst] = src |
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687 copy2[dst] = src |
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688 else: |
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689 diverge[src] = sorted(dsts1 | dsts2) |
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690 elif src in m1 and src in m2: |
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691 # copied on both sides |
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692 dsts1 = set(dsts1) |
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693 dsts2 = set(dsts2) |
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694 for dst in dsts1 & dsts2: |
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695 copy1[dst] = src |
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696 copy2[dst] = src |
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697 # TODO: Handle cases where it was renamed on one side and copied |
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698 # on the other side |
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699 elif dsts1: |
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700 # copied/renamed only on side 1 |
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|
701 _checksinglesidecopies( |
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702 src, dsts1, m1, m2, mb, c2, base, copy1, renamedelete1 |
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|
703 ) |
42222
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704 elif dsts2: |
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705 # copied/renamed only on side 2 |
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706 _checksinglesidecopies( |
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707 src, dsts2, m2, m1, mb, c1, base, copy2, renamedelete2 |
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|
708 ) |
42222
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|
709 |
26659
df66736a128e
copies: group bothnew with other sets
Matt Mackall <mpm@selenic.com>
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26658
diff
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|
710 # find interesting file sets from manifests |
39966
707c3804e607
narrow: move copies overrides to core
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39945
diff
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|
711 addedinm1 = m1.filesnotin(mb, repo.narrowmatch()) |
707c3804e607
narrow: move copies overrides to core
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diff
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|
712 addedinm2 = m2.filesnotin(mb, repo.narrowmatch()) |
42223
d69bc8ffbe6f
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diff
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|
713 u1 = sorted(addedinm1 - addedinm2) |
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|
714 u2 = sorted(addedinm2 - addedinm1) |
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|
715 |
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716 header = b" unmatched files in %s" |
42223
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|
717 if u1: |
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|
718 repo.ui.debug(b"%s:\n %s\n" % (header % b'local', b"\n ".join(u1))) |
42223
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|
719 if u2: |
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|
720 repo.ui.debug(b"%s:\n %s\n" % (header % b'other', b"\n ".join(u2))) |
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|
721 |
42166
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|
722 if repo.ui.debugflag: |
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|
723 renamedeleteset = set() |
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|
724 divergeset = set() |
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|
725 for dsts in diverge.values(): |
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|
726 divergeset.update(dsts) |
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|
727 for dsts in renamedelete1.values(): |
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|
728 renamedeleteset.update(dsts) |
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|
729 for dsts in renamedelete2.values(): |
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|
730 renamedeleteset.update(dsts) |
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|
731 |
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|
732 repo.ui.debug( |
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|
733 b" all copies found (* = to merge, ! = divergent, " |
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|
734 b"% = renamed and deleted):\n" |
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|
735 ) |
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|
736 for side, copies in ((b"local", copies1), (b"remote", copies2)): |
17e12938f8e7
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|
737 if not copies: |
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|
738 continue |
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changeset
|
739 repo.ui.debug(b" on %s side:\n" % side) |
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|
740 for f in sorted(copies): |
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|
741 note = b"" |
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changeset
|
742 if f in copy1 or f in copy2: |
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changeset
|
743 note += b"*" |
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|
744 if f in divergeset: |
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|
745 note += b"!" |
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changeset
|
746 if f in renamedeleteset: |
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|
747 note += b"%" |
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|
748 repo.ui.debug( |
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changeset
|
749 b" src: '%s' -> dst: '%s' %s\n" % (copies[f], f, note) |
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changeset
|
750 ) |
44163
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|
751 del renamedeleteset |
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44162
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changeset
|
752 del divergeset |
6274
f3f383efbeae
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changeset
|
753 |
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changeset
|
754 repo.ui.debug(b" checking for directory renames\n") |
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755 |
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756 dirmove1, movewithdir2 = _dir_renames(repo, c1, copy1, copies1, u2) |
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757 dirmove2, movewithdir1 = _dir_renames(repo, c2, copy2, copies2, u1) |
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758 |
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759 branch_copies1 = branch_copies(copy1, renamedelete1, dirmove1, movewithdir1) |
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760 branch_copies2 = branch_copies(copy2, renamedelete2, dirmove2, movewithdir2) |
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761 |
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762 return branch_copies1, branch_copies2, diverge |
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763 |
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764 |
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765 def _dir_renames(repo, ctx, copy, fullcopy, addedfiles): |
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766 """Finds moved directories and files that should move with them. |
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767 |
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768 ctx: the context for one of the sides |
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769 copy: files copied on the same side (as ctx) |
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770 fullcopy: files copied on the same side (as ctx), including those that |
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771 merge.manifestmerge() won't care about |
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772 addedfiles: added files on the other side (compared to ctx) |
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773 """ |
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774 # generate a directory move map |
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775 d = ctx.dirs() |
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776 invalid = set() |
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777 dirmove = {} |
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778 |
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779 # examine each file copy for a potential directory move, which is |
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780 # when all the files in a directory are moved to a new directory |
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781 for dst, src in pycompat.iteritems(fullcopy): |
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782 dsrc, ddst = pathutil.dirname(src), pathutil.dirname(dst) |
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783 if dsrc in invalid: |
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784 # already seen to be uninteresting |
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785 continue |
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786 elif dsrc in d and ddst in d: |
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787 # directory wasn't entirely moved locally |
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788 invalid.add(dsrc) |
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789 elif dsrc in dirmove and dirmove[dsrc] != ddst: |
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790 # files from the same directory moved to two different places |
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791 invalid.add(dsrc) |
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792 else: |
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793 # looks good so far |
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794 dirmove[dsrc] = ddst |
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795 |
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796 for i in invalid: |
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797 if i in dirmove: |
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798 del dirmove[i] |
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799 del d, invalid |
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800 |
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801 if not dirmove: |
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802 return {}, {} |
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803 |
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804 dirmove = {k + b"/": v + b"/" for k, v in pycompat.iteritems(dirmove)} |
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805 |
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806 for d in dirmove: |
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807 repo.ui.debug( |
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808 b" discovered dir src: '%s' -> dst: '%s'\n" % (d, dirmove[d]) |
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809 ) |
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810 |
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811 movewithdir = {} |
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812 # check unaccounted nonoverlapping files against directory moves |
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813 for f in addedfiles: |
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814 if f not in fullcopy: |
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815 for d in dirmove: |
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816 if f.startswith(d): |
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817 # new file added in a directory that was moved, move it |
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818 df = dirmove[d] + f[len(d) :] |
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819 if df not in copy: |
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820 movewithdir[f] = df |
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821 repo.ui.debug( |
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822 b" pending file src: '%s' -> dst: '%s'\n" |
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823 % (f, df) |
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824 ) |
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825 break |
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826 |
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827 return dirmove, movewithdir |
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828 |
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829 |
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830 def _heuristicscopytracing(repo, c1, c2, base): |
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831 """ Fast copytracing using filename heuristics |
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832 |
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833 Assumes that moves or renames are of following two types: |
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834 |
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835 1) Inside a directory only (same directory name but different filenames) |
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836 2) Move from one directory to another |
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837 (same filenames but different directory names) |
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838 |
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839 Works only when there are no merge commits in the "source branch". |
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840 Source branch is commits from base up to c2 not including base. |
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841 |
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842 If merge is involved it fallbacks to _fullcopytracing(). |
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843 |
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844 Can be used by setting the following config: |
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845 |
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846 [experimental] |
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847 copytrace = heuristics |
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848 |
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849 In some cases the copy/move candidates found by heuristics can be very large |
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850 in number and that will make the algorithm slow. The number of possible |
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851 candidates to check can be limited by using the config |
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852 `experimental.copytrace.movecandidateslimit` which defaults to 100. |
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853 """ |
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854 |
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855 if c1.rev() is None: |
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856 c1 = c1.p1() |
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857 if c2.rev() is None: |
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858 c2 = c2.p1() |
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859 |
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860 changedfiles = set() |
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861 m1 = c1.manifest() |
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862 if not repo.revs(b'%d::%d', base.rev(), c2.rev()): |
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863 # If base is not in c2 branch, we switch to fullcopytracing |
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864 repo.ui.debug( |
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865 b"switching to full copytracing as base is not " |
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866 b"an ancestor of c2\n" |
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867 ) |
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868 return _fullcopytracing(repo, c1, c2, base) |
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869 |
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870 ctx = c2 |
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871 while ctx != base: |
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872 if len(ctx.parents()) == 2: |
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873 # To keep things simple let's not handle merges |
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874 repo.ui.debug(b"switching to full copytracing because of merges\n") |
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875 return _fullcopytracing(repo, c1, c2, base) |
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876 changedfiles.update(ctx.files()) |
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877 ctx = ctx.p1() |
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878 |
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879 copies2 = {} |
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880 cp = _forwardcopies(base, c2) |
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881 for dst, src in pycompat.iteritems(cp): |
34179
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882 if src in m1: |
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883 copies2[dst] = src |
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884 |
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885 # file is missing if it isn't present in the destination, but is present in |
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886 # the base and present in the source. |
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887 # Presence in the base is important to exclude added files, presence in the |
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888 # source is important to exclude removed files. |
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889 filt = lambda f: f not in m1 and f in base and f in c2 |
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|
890 missingfiles = [f for f in changedfiles if filt(f)] |
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891 |
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892 copies1 = {} |
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893 if missingfiles: |
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894 basenametofilename = collections.defaultdict(list) |
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895 dirnametofilename = collections.defaultdict(list) |
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896 |
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897 for f in m1.filesnotin(base.manifest()): |
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898 basename = os.path.basename(f) |
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899 dirname = os.path.dirname(f) |
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900 basenametofilename[basename].append(f) |
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901 dirnametofilename[dirname].append(f) |
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|
902 |
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|
903 for f in missingfiles: |
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|
904 basename = os.path.basename(f) |
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905 dirname = os.path.dirname(f) |
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906 samebasename = basenametofilename[basename] |
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907 samedirname = dirnametofilename[dirname] |
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908 movecandidates = samebasename + samedirname |
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909 # f is guaranteed to be present in c2, that's why |
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910 # c2.filectx(f) won't fail |
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|
911 f2 = c2.filectx(f) |
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|
912 # we can have a lot of candidates which can slow down the heuristics |
f05a6e015ecc
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|
913 # config value to limit the number of candidates moves to check |
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|
914 maxcandidates = repo.ui.configint( |
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|
915 b'experimental', b'copytrace.movecandidateslimit' |
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|
916 ) |
34846
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|
917 |
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|
918 if len(movecandidates) > maxcandidates: |
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|
919 repo.ui.status( |
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|
920 _( |
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|
921 b"skipping copytracing for '%s', more " |
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|
922 b"candidates than the limit: %d\n" |
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|
923 ) |
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|
924 % (f, len(movecandidates)) |
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|
925 ) |
34846
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|
926 continue |
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|
927 |
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|
928 for candidate in movecandidates: |
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|
929 f1 = c1.filectx(candidate) |
37392
a4f02a17420d
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Gábor Stefanik <gabor.stefanik@nng.com>
parents:
36346
diff
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|
930 if _related(f1, f2): |
34179
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|
931 # if there are a few related copies then we'll merge |
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|
932 # changes into all of them. This matches the behaviour |
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|
933 # of upstream copytracing |
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|
934 copies1[candidate] = f |
34179
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|
935 |
44200
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|
936 return branch_copies(copies1), branch_copies(copies2), {} |
34179
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|
937 |
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|
938 |
37392
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|
939 def _related(f1, f2): |
30138
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|
940 """return True if f1 and f2 filectx have a common ancestor |
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|
941 |
733fb9f7bc92
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|
942 Walk back to common ancestor to see if the two files originate |
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diff
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|
943 from the same file. Since workingfilectx's rev() is None it messes |
733fb9f7bc92
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|
944 up the integer comparison logic, hence the pre-step check for |
733fb9f7bc92
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diff
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|
945 None (f1 and f2 can only be workingfilectx's initially). |
733fb9f7bc92
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diff
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|
946 """ |
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|
947 |
733fb9f7bc92
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|
948 if f1 == f2: |
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|
949 return True # a match |
30138
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diff
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|
950 |
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|
951 g1, g2 = f1.ancestors(), f2.ancestors() |
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|
952 try: |
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|
953 f1r, f2r = f1.linkrev(), f2.linkrev() |
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|
954 |
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|
955 if f1r is None: |
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|
956 f1 = next(g1) |
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|
957 if f2r is None: |
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|
958 f2 = next(g2) |
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|
959 |
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|
960 while True: |
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|
961 f1r, f2r = f1.linkrev(), f2.linkrev() |
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|
962 if f1r > f2r: |
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|
963 f1 = next(g1) |
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|
964 elif f2r > f1r: |
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|
965 f2 = next(g2) |
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|
966 else: # f1 and f2 point to files in the same linkrev |
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|
967 return f1 == f2 # true if they point to the same file |
30138
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|
968 except StopIteration: |
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|
969 return False |
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|
970 |
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|
971 |
44092
833210fbd900
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44091
diff
changeset
|
972 def graftcopies(wctx, ctx, base): |
44093
06e7e7652ac0
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changeset
|
973 """reproduce copies between base and ctx in the wctx |
06e7e7652ac0
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|
974 |
06e7e7652ac0
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diff
changeset
|
975 Unlike mergecopies(), this function will only consider copies between base |
06e7e7652ac0
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diff
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|
976 and ctx; it will ignore copies between base and wctx. Also unlike |
06e7e7652ac0
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diff
changeset
|
977 mergecopies(), this function will apply copies to the working copy (instead |
06e7e7652ac0
graftcopies: document why the function is useful at all
Martin von Zweigbergk <martinvonz@google.com>
parents:
44092
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changeset
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978 of just returning information about the copies). That makes it cheaper |
06e7e7652ac0
graftcopies: document why the function is useful at all
Martin von Zweigbergk <martinvonz@google.com>
parents:
44092
diff
changeset
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979 (especially in the common case of base==ctx.p1()) and useful also when |
06e7e7652ac0
graftcopies: document why the function is useful at all
Martin von Zweigbergk <martinvonz@google.com>
parents:
44092
diff
changeset
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980 experimental.copytrace=off. |
06e7e7652ac0
graftcopies: document why the function is useful at all
Martin von Zweigbergk <martinvonz@google.com>
parents:
44092
diff
changeset
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981 |
06e7e7652ac0
graftcopies: document why the function is useful at all
Martin von Zweigbergk <martinvonz@google.com>
parents:
44092
diff
changeset
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982 merge.update() will have already marked most copies, but it will only |
06e7e7652ac0
graftcopies: document why the function is useful at all
Martin von Zweigbergk <martinvonz@google.com>
parents:
44092
diff
changeset
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983 mark copies if it thinks the source files are related (see |
06e7e7652ac0
graftcopies: document why the function is useful at all
Martin von Zweigbergk <martinvonz@google.com>
parents:
44092
diff
changeset
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984 merge._related()). It will also not mark copies if the file wasn't modified |
06e7e7652ac0
graftcopies: document why the function is useful at all
Martin von Zweigbergk <martinvonz@google.com>
parents:
44092
diff
changeset
|
985 on the local side. This function adds the copies that were "missed" |
06e7e7652ac0
graftcopies: document why the function is useful at all
Martin von Zweigbergk <martinvonz@google.com>
parents:
44092
diff
changeset
|
986 by merge.update(). |
06e7e7652ac0
graftcopies: document why the function is useful at all
Martin von Zweigbergk <martinvonz@google.com>
parents:
44092
diff
changeset
|
987 """ |
44091
3df0bd706c40
graftcopies: use _filter() for filtering out invalid copies
Martin von Zweigbergk <martinvonz@google.com>
parents:
44090
diff
changeset
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988 new_copies = pathcopies(base, ctx) |
3df0bd706c40
graftcopies: use _filter() for filtering out invalid copies
Martin von Zweigbergk <martinvonz@google.com>
parents:
44090
diff
changeset
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989 _filter(wctx.p1(), wctx, new_copies) |
3df0bd706c40
graftcopies: use _filter() for filtering out invalid copies
Martin von Zweigbergk <martinvonz@google.com>
parents:
44090
diff
changeset
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990 for dst, src in pycompat.iteritems(new_copies): |
3df0bd706c40
graftcopies: use _filter() for filtering out invalid copies
Martin von Zweigbergk <martinvonz@google.com>
parents:
44090
diff
changeset
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991 wctx[dst].markcopied(src) |