Mercurial > hg
annotate mercurial/copies.py @ 46408:e948ad0dcbe2
copies: add an devel option to trace all files
Filelog based copy tracing only trace copy for file that have been added. This
is a trade off between skipping some rare copy case in exchange for avoiding
atrocious-to-the-point-of-unusable performance.
The changeset centric copy tracing does not need this trade off and naturally
trace all copy, include the one involving non-new files.
In order to ease the comparison from both algorithm, we add a small devel option
to trace copy for all files in the target revisions.
Differential Revision: https://phab.mercurial-scm.org/D9796
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Sat, 16 Jan 2021 00:03:18 +0100 |
parents | 1d6d1a15a963 |
children | 892eb7c5edaa |
rev | line source |
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1 # coding: utf8 |
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2 # copies.py - copy detection for Mercurial |
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3 # |
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4 # Copyright 2008 Matt Mackall <mpm@selenic.com> |
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5 # |
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6 # This software may be used and distributed according to the terms of the |
10263 | 7 # GNU General Public License version 2 or any later version. |
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8 |
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9 from __future__ import absolute_import |
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10 |
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11 import collections |
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12 import os |
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13 |
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14 from .i18n import _ |
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15 from .node import ( |
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16 nullid, |
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17 nullrev, |
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18 ) |
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19 |
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20 from . import ( |
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21 match as matchmod, |
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22 pathutil, |
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23 policy, |
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24 pycompat, |
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25 util, |
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26 ) |
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27 |
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28 |
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29 from .utils import stringutil |
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30 |
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31 from .revlogutils import ( |
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32 flagutil, |
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33 sidedata as sidedatamod, |
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34 ) |
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35 |
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36 rustmod = policy.importrust("copy_tracing") |
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37 |
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38 |
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39 def _filter(src, dst, t): |
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40 """filters out invalid copies after chaining""" |
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41 |
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42 # When _chain()'ing copies in 'a' (from 'src' via some other commit 'mid') |
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43 # with copies in 'b' (from 'mid' to 'dst'), we can get the different cases |
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44 # in the following table (not including trivial cases). For example, case 6 |
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45 # is where a file existed in 'src' and remained under that name in 'mid' and |
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46 # then was renamed between 'mid' and 'dst'. |
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47 # |
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48 # case src mid dst result |
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49 # 1 x y - - |
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50 # 2 x y y x->y |
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51 # 3 x y x - |
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52 # 4 x y z x->z |
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53 # 5 - x y - |
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54 # 6 x x y x->y |
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55 # |
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56 # _chain() takes care of chaining the copies in 'a' and 'b', but it |
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57 # cannot tell the difference between cases 1 and 2, between 3 and 4, or |
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58 # between 5 and 6, so it includes all cases in its result. |
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59 # Cases 1, 3, and 5 are then removed by _filter(). |
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60 |
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61 for k, v in list(t.items()): |
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62 if k == v: # case 3 |
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63 del t[k] |
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64 elif v not in src: # case 5 |
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65 # remove copies from files that didn't exist |
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66 del t[k] |
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67 elif k not in dst: # case 1 |
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68 # remove copies to files that were then removed |
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69 del t[k] |
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70 |
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71 |
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72 def _chain(prefix, suffix): |
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73 """chain two sets of copies 'prefix' and 'suffix'""" |
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74 result = prefix.copy() |
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75 for key, value in pycompat.iteritems(suffix): |
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76 result[key] = prefix.get(value, value) |
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77 return result |
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78 |
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79 |
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80 def _tracefile(fctx, am, basemf): |
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81 """return file context that is the ancestor of fctx present in ancestor |
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82 manifest am |
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83 |
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84 Note: we used to try and stop after a given limit, however checking if that |
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85 limit is reached turned out to be very expensive. we are better off |
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86 disabling that feature.""" |
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87 |
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88 for f in fctx.ancestors(): |
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89 path = f.path() |
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90 if am.get(path, None) == f.filenode(): |
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91 return path |
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92 if basemf and basemf.get(path, None) == f.filenode(): |
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93 return path |
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94 |
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95 |
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96 def _dirstatecopies(repo, match=None): |
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97 ds = repo.dirstate |
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98 c = ds.copies().copy() |
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99 for k in list(c): |
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100 if ds[k] not in b'anm' or (match and not match(k)): |
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101 del c[k] |
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102 return c |
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103 |
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104 |
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105 def _computeforwardmissing(a, b, match=None): |
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106 """Computes which files are in b but not a. |
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107 This is its own function so extensions can easily wrap this call to see what |
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108 files _forwardcopies is about to process. |
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109 """ |
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110 ma = a.manifest() |
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111 mb = b.manifest() |
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112 return mb.filesnotin(ma, match=match) |
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113 |
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114 |
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115 def usechangesetcentricalgo(repo): |
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116 """Checks if we should use changeset-centric copy algorithms""" |
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117 if repo.filecopiesmode == b'changeset-sidedata': |
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118 return True |
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119 readfrom = repo.ui.config(b'experimental', b'copies.read-from') |
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120 changesetsource = (b'changeset-only', b'compatibility') |
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121 return readfrom in changesetsource |
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122 |
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123 |
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124 def _committedforwardcopies(a, b, base, match): |
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125 """Like _forwardcopies(), but b.rev() cannot be None (working copy)""" |
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126 # files might have to be traced back to the fctx parent of the last |
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127 # one-side-only changeset, but not further back than that |
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128 repo = a._repo |
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129 |
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130 if usechangesetcentricalgo(repo): |
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131 return _changesetforwardcopies(a, b, match) |
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132 |
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133 debug = repo.ui.debugflag and repo.ui.configbool(b'devel', b'debug.copies') |
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134 dbg = repo.ui.debug |
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135 if debug: |
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136 dbg(b'debug.copies: looking into rename from %s to %s\n' % (a, b)) |
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137 am = a.manifest() |
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138 basemf = None if base is None else base.manifest() |
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139 |
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140 # find where new files came from |
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141 # we currently don't try to find where old files went, too expensive |
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142 # this means we can miss a case like 'hg rm b; hg cp a b' |
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143 cm = {} |
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144 |
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145 # Computing the forward missing is quite expensive on large manifests, since |
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146 # it compares the entire manifests. We can optimize it in the common use |
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147 # case of computing what copies are in a commit versus its parent (like |
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148 # during a rebase or histedit). Note, we exclude merge commits from this |
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149 # optimization, since the ctx.files() for a merge commit is not correct for |
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150 # this comparison. |
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151 forwardmissingmatch = match |
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152 if b.p1() == a and b.p2().node() == nullid: |
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153 filesmatcher = matchmod.exact(b.files()) |
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154 forwardmissingmatch = matchmod.intersectmatchers(match, filesmatcher) |
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155 if repo.ui.configbool(b'devel', b'copy-tracing.trace-all-files'): |
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156 missing = list(b.walk(match)) |
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157 # _computeforwardmissing(a, b, match=forwardmissingmatch) |
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158 if debug: |
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159 dbg(b'debug.copies: searching all files: %d\n' % len(missing)) |
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160 else: |
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161 missing = _computeforwardmissing(a, b, match=forwardmissingmatch) |
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162 if debug: |
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163 dbg( |
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164 b'debug.copies: missing files to search: %d\n' |
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165 % len(missing) |
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166 ) |
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167 |
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168 ancestrycontext = a._repo.changelog.ancestors([b.rev()], inclusive=True) |
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169 |
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170 for f in sorted(missing): |
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171 if debug: |
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172 dbg(b'debug.copies: tracing file: %s\n' % f) |
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173 fctx = b[f] |
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174 fctx._ancestrycontext = ancestrycontext |
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175 |
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176 if debug: |
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177 start = util.timer() |
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178 opath = _tracefile(fctx, am, basemf) |
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179 if opath: |
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180 if debug: |
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181 dbg(b'debug.copies: rename of: %s\n' % opath) |
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182 cm[f] = opath |
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183 if debug: |
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184 dbg( |
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185 b'debug.copies: time: %f seconds\n' |
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186 % (util.timer() - start) |
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187 ) |
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188 return cm |
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189 |
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190 |
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191 def _revinfo_getter(repo, match): |
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192 """returns a function that returns the following data given a <rev>" |
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193 |
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194 * p1: revision number of first parent |
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195 * p2: revision number of first parent |
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196 * changes: a ChangingFiles object |
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197 """ |
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198 cl = repo.changelog |
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199 parents = cl.parentrevs |
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200 flags = cl.flags |
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201 |
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202 HASCOPIESINFO = flagutil.REVIDX_HASCOPIESINFO |
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203 |
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204 changelogrevision = cl.changelogrevision |
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205 |
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206 if rustmod is not None: |
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207 |
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208 def revinfo(rev): |
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209 p1, p2 = parents(rev) |
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210 if flags(rev) & HASCOPIESINFO: |
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211 raw = changelogrevision(rev)._sidedata.get(sidedatamod.SD_FILES) |
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212 else: |
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213 raw = None |
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214 return (p1, p2, raw) |
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215 |
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216 else: |
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217 |
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218 def revinfo(rev): |
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219 p1, p2 = parents(rev) |
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220 if flags(rev) & HASCOPIESINFO: |
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221 changes = changelogrevision(rev).changes |
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222 else: |
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223 changes = None |
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224 return (p1, p2, changes) |
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225 |
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226 return revinfo |
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227 |
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228 |
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229 def cached_is_ancestor(is_ancestor): |
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230 """return a cached version of is_ancestor""" |
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231 cache = {} |
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232 |
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233 def _is_ancestor(anc, desc): |
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234 if anc > desc: |
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235 return False |
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236 elif anc == desc: |
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237 return True |
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238 key = (anc, desc) |
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239 ret = cache.get(key) |
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240 if ret is None: |
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241 ret = cache[key] = is_ancestor(anc, desc) |
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242 return ret |
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243 |
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244 return _is_ancestor |
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245 |
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246 |
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247 def _changesetforwardcopies(a, b, match): |
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248 if a.rev() in (nullrev, b.rev()): |
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249 return {} |
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250 |
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251 repo = a.repo().unfiltered() |
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252 children = {} |
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253 |
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254 cl = repo.changelog |
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255 isancestor = cl.isancestorrev |
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256 |
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257 # To track rename from "A" to B, we need to gather all parent → children |
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258 # edges that are contains in `::B` but not in `::A`. |
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259 # |
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260 # |
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261 # To do so, we need to gather all revisions exclusive¹ to "B" (ie¹: `::b - |
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262 # ::a`) and also all the "roots point", ie the parents of the exclusive set |
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263 # that belong to ::a. These are exactly all the revisions needed to express |
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264 # the parent → children we need to combine. |
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265 # |
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266 # [1] actually, we need to gather all the edges within `(::a)::b`, ie: |
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267 # excluding paths that leads to roots that are not ancestors of `a`. We |
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268 # keep this out of the explanation because it is hard enough without this special case.. |
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269 |
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270 parents = cl._uncheckedparentrevs |
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271 graph_roots = (nullrev, nullrev) |
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272 |
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273 ancestors = cl.ancestors([a.rev()], inclusive=True) |
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274 revs = cl.findmissingrevs(common=[a.rev()], heads=[b.rev()]) |
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275 roots = set() |
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276 has_graph_roots = False |
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277 |
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278 # iterate over `only(B, A)` |
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279 for r in revs: |
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280 ps = parents(r) |
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281 if ps == graph_roots: |
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282 has_graph_roots = True |
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283 else: |
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284 p1, p2 = ps |
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285 |
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286 # find all the "root points" (see larger comment above) |
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287 if p1 != nullrev and p1 in ancestors: |
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288 roots.add(p1) |
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289 if p2 != nullrev and p2 in ancestors: |
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290 roots.add(p2) |
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291 if not roots: |
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292 # no common revision to track copies from |
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293 return {} |
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294 if has_graph_roots: |
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295 # this deal with the special case mentionned in the [1] footnotes. We |
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296 # must filter out revisions that leads to non-common graphroots. |
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297 roots = list(roots) |
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298 m = min(roots) |
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299 h = [b.rev()] |
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300 roots_to_head = cl.reachableroots(m, h, roots, includepath=True) |
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301 roots_to_head = set(roots_to_head) |
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302 revs = [r for r in revs if r in roots_to_head] |
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303 |
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304 if repo.filecopiesmode == b'changeset-sidedata': |
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305 # When using side-data, we will process the edges "from" the children. |
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306 # We iterate over the childre, gathering previous collected data for |
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307 # the parents. Do know when the parents data is no longer necessary, we |
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308 # keep a counter of how many children each revision has. |
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309 # |
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310 # An interresting property of `children_count` is that it only contains |
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311 # revision that will be relevant for a edge of the graph. So if a |
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312 # children has parent not in `children_count`, that edges should not be |
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313 # processed. |
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314 children_count = dict((r, 0) for r in roots) |
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315 for r in revs: |
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316 for p in cl.parentrevs(r): |
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317 if p == nullrev: |
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318 continue |
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319 children_count[r] = 0 |
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320 if p in children_count: |
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321 children_count[p] += 1 |
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322 revinfo = _revinfo_getter(repo, match) |
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323 return _combine_changeset_copies( |
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324 revs, children_count, b.rev(), revinfo, match, isancestor |
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325 ) |
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326 else: |
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327 # When not using side-data, we will process the edges "from" the parent. |
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328 # so we need a full mapping of the parent -> children relation. |
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329 children = dict((r, []) for r in roots) |
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330 for r in revs: |
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331 for p in cl.parentrevs(r): |
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332 if p == nullrev: |
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333 continue |
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334 children[r] = [] |
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335 if p in children: |
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336 children[p].append(r) |
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337 x = revs.pop() |
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338 assert x == b.rev() |
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339 revs.extend(roots) |
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340 revs.sort() |
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341 |
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342 revinfo = _revinfo_getter_extra(repo) |
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343 return _combine_changeset_copies_extra( |
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344 revs, children, b.rev(), revinfo, match, isancestor |
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345 ) |
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346 |
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347 |
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348 def _combine_changeset_copies( |
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349 revs, children_count, targetrev, revinfo, match, isancestor |
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350 ): |
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351 """combine the copies information for each item of iterrevs |
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352 |
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353 revs: sorted iterable of revision to visit |
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354 children_count: a {parent: <number-of-relevant-children>} mapping. |
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355 targetrev: the final copies destination revision (not in iterrevs) |
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356 revinfo(rev): a function that return (p1, p2, p1copies, p2copies, removed) |
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357 match: a matcher |
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358 |
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359 It returns the aggregated copies information for `targetrev`. |
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360 """ |
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361 |
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362 alwaysmatch = match.always() |
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363 |
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364 if rustmod is not None: |
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365 final_copies = rustmod.combine_changeset_copies( |
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366 list(revs), children_count, targetrev, revinfo, isancestor |
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367 ) |
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368 else: |
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369 isancestor = cached_is_ancestor(isancestor) |
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370 |
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371 all_copies = {} |
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372 # iterate over all the "children" side of copy tracing "edge" |
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373 for current_rev in revs: |
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374 p1, p2, changes = revinfo(current_rev) |
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375 current_copies = None |
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376 # iterate over all parents to chain the existing data with the |
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377 # data from the parent → child edge. |
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378 for parent, parent_rev in ((1, p1), (2, p2)): |
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379 if parent_rev == nullrev: |
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380 continue |
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381 remaining_children = children_count.get(parent_rev) |
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382 if remaining_children is None: |
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383 continue |
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384 remaining_children -= 1 |
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385 children_count[parent_rev] = remaining_children |
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386 if remaining_children: |
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387 copies = all_copies.get(parent_rev, None) |
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388 else: |
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389 copies = all_copies.pop(parent_rev, None) |
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390 |
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391 if copies is None: |
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392 # this is a root |
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393 newcopies = copies = {} |
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394 elif remaining_children: |
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395 newcopies = copies.copy() |
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396 else: |
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397 newcopies = copies |
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398 # chain the data in the edge with the existing data |
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399 if changes is not None: |
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400 childcopies = {} |
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401 if parent == 1: |
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402 childcopies = changes.copied_from_p1 |
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403 elif parent == 2: |
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404 childcopies = changes.copied_from_p2 |
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405 |
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406 if childcopies: |
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407 newcopies = copies.copy() |
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408 for dest, source in pycompat.iteritems(childcopies): |
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409 prev = copies.get(source) |
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410 if prev is not None and prev[1] is not None: |
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411 source = prev[1] |
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412 newcopies[dest] = (current_rev, source) |
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413 assert newcopies is not copies |
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414 if changes.removed: |
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415 for f in changes.removed: |
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416 if f in newcopies: |
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417 if newcopies is copies: |
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418 # copy on write to avoid affecting potential other |
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419 # branches. when there are no other branches, this |
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420 # could be avoided. |
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421 newcopies = copies.copy() |
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422 newcopies[f] = (current_rev, None) |
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423 # check potential need to combine the data from another parent (for |
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424 # that child). See comment below for details. |
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425 if current_copies is None: |
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426 current_copies = newcopies |
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427 else: |
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428 # we are the second parent to work on c, we need to merge our |
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429 # work with the other. |
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430 # |
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431 # In case of conflict, parent 1 take precedence over parent 2. |
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432 # This is an arbitrary choice made anew when implementing |
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433 # changeset based copies. It was made without regards with |
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434 # potential filelog related behavior. |
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435 assert parent == 2 |
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436 current_copies = _merge_copies_dict( |
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437 newcopies, current_copies, isancestor, changes |
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438 ) |
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439 all_copies[current_rev] = current_copies |
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440 |
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441 # filter out internal details and return a {dest: source mapping} |
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442 final_copies = {} |
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443 for dest, (tt, source) in all_copies[targetrev].items(): |
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444 if source is not None: |
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445 final_copies[dest] = source |
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446 if not alwaysmatch: |
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447 for filename in list(final_copies.keys()): |
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448 if not match(filename): |
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449 del final_copies[filename] |
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450 return final_copies |
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451 |
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452 |
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453 # constant to decide which side to pick with _merge_copies_dict |
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454 PICK_MINOR = 0 |
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455 PICK_MAJOR = 1 |
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456 PICK_EITHER = 2 |
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457 |
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458 |
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459 def _merge_copies_dict(minor, major, isancestor, changes): |
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460 """merge two copies-mapping together, minor and major |
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461 |
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462 In case of conflict, value from "major" will be picked. |
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463 |
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464 - `isancestors(low_rev, high_rev)`: callable return True if `low_rev` is an |
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465 ancestors of `high_rev`, |
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466 |
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467 - `ismerged(path)`: callable return True if `path` have been merged in the |
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468 current revision, |
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469 |
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470 return the resulting dict (in practice, the "minor" object, updated) |
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471 """ |
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472 for dest, value in major.items(): |
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473 other = minor.get(dest) |
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474 if other is None: |
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475 minor[dest] = value |
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476 else: |
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477 pick = _compare_values(changes, isancestor, dest, other, value) |
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478 if pick == PICK_MAJOR: |
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479 minor[dest] = value |
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480 return minor |
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481 |
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482 |
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483 def _compare_values(changes, isancestor, dest, minor, major): |
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484 """compare two value within a _merge_copies_dict loop iteration""" |
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485 major_tt, major_value = major |
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486 minor_tt, minor_value = minor |
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487 |
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488 # evacuate some simple case first: |
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489 if major_tt == minor_tt: |
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490 # if it comes from the same revision it must be the same value |
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491 assert major_value == minor_value |
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492 return PICK_EITHER |
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493 elif major[1] == minor[1]: |
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494 return PICK_EITHER |
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495 |
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496 # actual merging needed: content from "major" wins, unless it is older than |
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497 # the branch point or there is a merge |
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498 elif changes is not None and major[1] is None and dest in changes.salvaged: |
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499 return PICK_MINOR |
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500 elif changes is not None and minor[1] is None and dest in changes.salvaged: |
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501 return PICK_MAJOR |
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502 elif changes is not None and dest in changes.merged: |
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503 return PICK_MAJOR |
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504 elif not isancestor(major_tt, minor_tt): |
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505 if major[1] is not None: |
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506 return PICK_MAJOR |
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507 elif isancestor(minor_tt, major_tt): |
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508 return PICK_MAJOR |
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509 return PICK_MINOR |
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510 |
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511 |
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|
512 def _revinfo_getter_extra(repo): |
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513 """return a function that return multiple data given a <rev>"i |
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514 |
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515 * p1: revision number of first parent |
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516 * p2: revision number of first parent |
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517 * p1copies: mapping of copies from p1 |
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518 * p2copies: mapping of copies from p2 |
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|
519 * removed: a list of removed files |
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|
520 * ismerged: a callback to know if file was merged in that revision |
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521 """ |
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|
522 cl = repo.changelog |
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523 parents = cl.parentrevs |
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524 |
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525 def get_ismerged(rev): |
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|
526 ctx = repo[rev] |
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527 |
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|
528 def ismerged(path): |
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|
529 if path not in ctx.files(): |
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|
530 return False |
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|
531 fctx = ctx[path] |
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532 parents = fctx._filelog.parents(fctx._filenode) |
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changeset
|
533 nb_parents = 0 |
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changeset
|
534 for n in parents: |
46113
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parents:
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|
535 if n != nullid: |
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|
536 nb_parents += 1 |
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537 return nb_parents >= 2 |
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538 |
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|
539 return ismerged |
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changeset
|
540 |
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|
541 def revinfo(rev): |
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542 p1, p2 = parents(rev) |
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|
543 ctx = repo[rev] |
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544 p1copies, p2copies = ctx._copies |
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|
545 removed = ctx.filesremoved() |
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546 return p1, p2, p1copies, p2copies, removed, get_ismerged(rev) |
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|
547 |
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|
548 return revinfo |
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changeset
|
549 |
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|
550 |
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|
551 def _combine_changeset_copies_extra( |
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changeset
|
552 revs, children, targetrev, revinfo, match, isancestor |
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changeset
|
553 ): |
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554 """version of `_combine_changeset_copies` that works with the Google |
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555 specific "extra" based storage for copy information""" |
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|
556 all_copies = {} |
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|
557 alwaysmatch = match.always() |
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558 for r in revs: |
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559 copies = all_copies.pop(r, None) |
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|
560 if copies is None: |
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|
561 # this is a root |
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|
562 copies = {} |
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|
563 for i, c in enumerate(children[r]): |
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564 p1, p2, p1copies, p2copies, removed, ismerged = revinfo(c) |
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|
565 if r == p1: |
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changeset
|
566 parent = 1 |
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|
567 childcopies = p1copies |
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changeset
|
568 else: |
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changeset
|
569 assert r == p2 |
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|
570 parent = 2 |
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|
571 childcopies = p2copies |
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changeset
|
572 if not alwaysmatch: |
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changeset
|
573 childcopies = { |
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|
574 dst: src for dst, src in childcopies.items() if match(dst) |
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changeset
|
575 } |
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changeset
|
576 newcopies = copies |
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changeset
|
577 if childcopies: |
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copies: make two version of the changeset centric algorithm
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changeset
|
578 newcopies = copies.copy() |
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changeset
|
579 for dest, source in pycompat.iteritems(childcopies): |
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changeset
|
580 prev = copies.get(source) |
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changeset
|
581 if prev is not None and prev[1] is not None: |
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changeset
|
582 source = prev[1] |
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changeset
|
583 newcopies[dest] = (c, source) |
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changeset
|
584 assert newcopies is not copies |
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copies: make two version of the changeset centric algorithm
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changeset
|
585 for f in removed: |
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changeset
|
586 if f in newcopies: |
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changeset
|
587 if newcopies is copies: |
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changeset
|
588 # copy on write to avoid affecting potential other |
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changeset
|
589 # branches. when there are no other branches, this |
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changeset
|
590 # could be avoided. |
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changeset
|
591 newcopies = copies.copy() |
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changeset
|
592 newcopies[f] = (c, None) |
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changeset
|
593 othercopies = all_copies.get(c) |
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changeset
|
594 if othercopies is None: |
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changeset
|
595 all_copies[c] = newcopies |
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changeset
|
596 else: |
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changeset
|
597 # we are the second parent to work on c, we need to merge our |
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changeset
|
598 # work with the other. |
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changeset
|
599 # |
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changeset
|
600 # In case of conflict, parent 1 take precedence over parent 2. |
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changeset
|
601 # This is an arbitrary choice made anew when implementing |
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changeset
|
602 # changeset based copies. It was made without regards with |
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changeset
|
603 # potential filelog related behavior. |
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changeset
|
604 if parent == 1: |
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changeset
|
605 _merge_copies_dict_extra( |
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changeset
|
606 othercopies, newcopies, isancestor, ismerged |
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changeset
|
607 ) |
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changeset
|
608 else: |
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changeset
|
609 _merge_copies_dict_extra( |
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changeset
|
610 newcopies, othercopies, isancestor, ismerged |
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changeset
|
611 ) |
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changeset
|
612 all_copies[c] = newcopies |
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changeset
|
613 |
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|
614 final_copies = {} |
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changeset
|
615 for dest, (tt, source) in all_copies[targetrev].items(): |
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|
616 if source is not None: |
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changeset
|
617 final_copies[dest] = source |
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|
618 return final_copies |
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changeset
|
619 |
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changeset
|
620 |
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changeset
|
621 def _merge_copies_dict_extra(minor, major, isancestor, ismerged): |
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changeset
|
622 """version of `_merge_copies_dict` that works with the Google |
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changeset
|
623 specific "extra" based storage for copy information""" |
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624 for dest, value in major.items(): |
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625 other = minor.get(dest) |
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626 if other is None: |
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627 minor[dest] = value |
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628 else: |
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629 new_tt = value[0] |
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630 other_tt = other[0] |
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631 if value[1] == other[1]: |
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632 continue |
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633 # content from "major" wins, unless it is older |
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634 # than the branch point or there is a merge |
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635 if ( |
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636 new_tt == other_tt |
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637 or not isancestor(new_tt, other_tt) |
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638 or ismerged(dest) |
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639 ): |
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640 minor[dest] = value |
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641 |
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642 |
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643 def _forwardcopies(a, b, base=None, match=None): |
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644 """find {dst@b: src@a} copy mapping where a is an ancestor of b""" |
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645 |
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646 if base is None: |
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647 base = a |
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648 match = a.repo().narrowmatch(match) |
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649 # check for working copy |
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650 if b.rev() is None: |
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651 cm = _committedforwardcopies(a, b.p1(), base, match) |
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652 # combine copies from dirstate if necessary |
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653 copies = _chain(cm, _dirstatecopies(b._repo, match)) |
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654 else: |
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655 copies = _committedforwardcopies(a, b, base, match) |
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656 return copies |
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657 |
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658 |
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659 def _backwardrenames(a, b, match): |
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660 if a._repo.ui.config(b'experimental', b'copytrace') == b'off': |
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661 return {} |
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662 |
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663 # Even though we're not taking copies into account, 1:n rename situations |
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664 # can still exist (e.g. hg cp a b; hg mv a c). In those cases we |
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665 # arbitrarily pick one of the renames. |
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666 # We don't want to pass in "match" here, since that would filter |
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667 # the destination by it. Since we're reversing the copies, we want |
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668 # to filter the source instead. |
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669 f = _forwardcopies(b, a) |
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670 r = {} |
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671 for k, v in sorted(pycompat.iteritems(f)): |
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672 if match and not match(v): |
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673 continue |
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674 # remove copies |
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675 if v in a: |
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676 continue |
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677 r[v] = k |
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678 return r |
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679 |
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680 |
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681 def pathcopies(x, y, match=None): |
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682 """find {dst@y: src@x} copy mapping for directed compare""" |
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683 repo = x._repo |
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684 debug = repo.ui.debugflag and repo.ui.configbool(b'devel', b'debug.copies') |
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685 if debug: |
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686 repo.ui.debug( |
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687 b'debug.copies: searching copies from %s to %s\n' % (x, y) |
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688 ) |
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689 if x == y or not x or not y: |
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690 return {} |
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691 if y.rev() is None and x == y.p1(): |
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692 if debug: |
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693 repo.ui.debug(b'debug.copies: search mode: dirstate\n') |
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694 # short-circuit to avoid issues with merge states |
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695 return _dirstatecopies(repo, match) |
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696 a = y.ancestor(x) |
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697 if a == x: |
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698 if debug: |
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699 repo.ui.debug(b'debug.copies: search mode: forward\n') |
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700 copies = _forwardcopies(x, y, match=match) |
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701 elif a == y: |
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702 if debug: |
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703 repo.ui.debug(b'debug.copies: search mode: backward\n') |
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704 copies = _backwardrenames(x, y, match=match) |
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705 else: |
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706 if debug: |
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707 repo.ui.debug(b'debug.copies: search mode: combined\n') |
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708 base = None |
46113
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|
709 if a.rev() != nullrev: |
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710 base = x |
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711 copies = _chain( |
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712 _backwardrenames(x, a, match=match), |
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713 _forwardcopies(a, y, base, match=match), |
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714 ) |
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|
715 _filter(x, y, copies) |
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716 return copies |
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717 |
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718 |
30186
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|
719 def mergecopies(repo, c1, c2, base): |
6274
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720 """ |
42118
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721 Finds moves and copies between context c1 and c2 that are relevant for |
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722 merging. 'base' will be used as the merge base. |
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723 |
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724 Copytracing is used in commands like rebase, merge, unshelve, etc to merge |
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|
725 files that were moved/ copied in one merge parent and modified in another. |
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726 For example: |
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727 |
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|
728 o ---> 4 another commit |
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729 | |
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730 | o ---> 3 commit that modifies a.txt |
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731 | / |
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|
732 o / ---> 2 commit that moves a.txt to b.txt |
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733 |/ |
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|
734 o ---> 1 merge base |
42ad7cc645a4
copies: add more details to the documentation of mergecopies()
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|
735 |
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diff
changeset
|
736 If we try to rebase revision 3 on revision 4, since there is no a.txt in |
42ad7cc645a4
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Pulkit Goyal <7895pulkit@gmail.com>
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737 revision 4, and if user have copytrace disabled, we prints the following |
42ad7cc645a4
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parents:
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|
738 message: |
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739 |
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740 ```other changed <file> which local deleted``` |
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741 |
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742 Returns a tuple where: |
16168
7bbabfe25321
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Matt Mackall <mpm@selenic.com>
parents:
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diff
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|
743 |
44199
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744 "branch_copies" an instance of branch_copies. |
18134
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copies: separate moves via directory renames from explicit copies
Siddharth Agarwal <sid0@fb.com>
parents:
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diff
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745 |
16168
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diff
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|
746 "diverge" is a mapping of source name -> list of destination names |
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Matt Mackall <mpm@selenic.com>
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diff
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|
747 for divergent renames. |
16794
98687cdddcb1
merge: warn about file deleted in one branch and renamed in other (issue3074)
Thomas Arendsen Hein <thomas@intevation.de>
parents:
16792
diff
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|
748 |
42118
967c098eed33
copies: move comment about implementation of mergecopies() to end
Martin von Zweigbergk <martinvonz@google.com>
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diff
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|
749 This function calls different copytracing algorithms based on config. |
6274
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
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diff
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|
750 """ |
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
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diff
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|
751 # avoid silly behavior for update from empty dir |
6430
a6a66e812c34
copies: teach symmetric difference about working revisions
Matt Mackall <mpm@selenic.com>
parents:
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diff
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|
752 if not c1 or not c2 or c1 == c2: |
44200
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diff
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|
753 return branch_copies(), branch_copies(), {} |
6274
f3f383efbeae
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
754 |
41752
012f695546aa
copies: respect narrowmatcher in "parent -> working dir" case
Martin von Zweigbergk <martinvonz@google.com>
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diff
changeset
|
755 narrowmatch = c1.repo().narrowmatch() |
012f695546aa
copies: respect narrowmatcher in "parent -> working dir" case
Martin von Zweigbergk <martinvonz@google.com>
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diff
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|
756 |
6646
9eb274d773d9
copies: teach copies about dirstate.copies
Matt Mackall <mpm@selenic.com>
parents:
6431
diff
changeset
|
757 # avoid silly behavior for parent -> working dir |
13878
a8d13ee0ce68
misc: replace .parents()[0] with p1()
Matt Mackall <mpm@selenic.com>
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diff
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|
758 if c2.node() is None and c1.node() == repo.dirstate.p1(): |
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|
759 return ( |
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760 branch_copies(_dirstatecopies(repo, narrowmatch)), |
fa9ad1da2e77
merge: start using the per-side copy dicts
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|
761 branch_copies(), |
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|
762 {}, |
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|
763 ) |
6646
9eb274d773d9
copies: teach copies about dirstate.copies
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parents:
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diff
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|
764 |
43077
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diff
changeset
|
765 copytracing = repo.ui.config(b'experimental', b'copytrace') |
42225
d8ca7b99fc51
copies: move check for experimental.copytrace==<falsy> earlier
Martin von Zweigbergk <martinvonz@google.com>
parents:
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diff
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|
766 if stringutil.parsebool(copytracing) is False: |
d8ca7b99fc51
copies: move check for experimental.copytrace==<falsy> earlier
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diff
changeset
|
767 # stringutil.parsebool() returns None when it is unable to parse the |
d8ca7b99fc51
copies: move check for experimental.copytrace==<falsy> earlier
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diff
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|
768 # value, so we should rely on making sure copytracing is on such cases |
44200
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diff
changeset
|
769 return branch_copies(), branch_copies(), {} |
34078
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copytrace: move the default copytracing algorithm in a new function
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parents:
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diff
changeset
|
770 |
42226
a6be3af3a397
copies: ignore heuristics copytracing when using changeset-centric algos
Martin von Zweigbergk <martinvonz@google.com>
parents:
42225
diff
changeset
|
771 if usechangesetcentricalgo(repo): |
a6be3af3a397
copies: ignore heuristics copytracing when using changeset-centric algos
Martin von Zweigbergk <martinvonz@google.com>
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diff
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|
772 # The heuristics don't make sense when we need changeset-centric algos |
a6be3af3a397
copies: ignore heuristics copytracing when using changeset-centric algos
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diff
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|
773 return _fullcopytracing(repo, c1, c2, base) |
a6be3af3a397
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parents:
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diff
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|
774 |
26013
38f92d12357c
copy: add flag for disabling copy tracing
Durham Goode <durham@fb.com>
parents:
25924
diff
changeset
|
775 # Copy trace disabling is explicitly below the node == p1 logic above |
38f92d12357c
copy: add flag for disabling copy tracing
Durham Goode <durham@fb.com>
parents:
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diff
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|
776 # because the logic above is required for a simple copy to be kept across a |
38f92d12357c
copy: add flag for disabling copy tracing
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parents:
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diff
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777 # rebase. |
43077
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diff
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|
778 if copytracing == b'heuristics': |
34366
d00910b286cd
copytrace: use ctx.mutable() instead of adhoc constant of non-public phases
Yuya Nishihara <yuya@tcha.org>
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diff
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|
779 # Do full copytracing if only non-public revisions are involved as |
d00910b286cd
copytrace: use ctx.mutable() instead of adhoc constant of non-public phases
Yuya Nishihara <yuya@tcha.org>
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|
780 # that will be fast enough and will also cover the copies which could |
d00910b286cd
copytrace: use ctx.mutable() instead of adhoc constant of non-public phases
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diff
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|
781 # be missed by heuristics |
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1826d695ad58
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|
782 if _isfullcopytraceable(repo, c1, base): |
34288
fc3b8483c6cb
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diff
changeset
|
783 return _fullcopytracing(repo, c1, c2, base) |
34179
036d47d7cf39
copytrace: move fast heuristic copytracing algorithm to core
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parents:
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diff
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|
784 return _heuristicscopytracing(repo, c1, c2, base) |
34078
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diff
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|
785 else: |
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|
786 return _fullcopytracing(repo, c1, c2, base) |
26013
38f92d12357c
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parents:
25924
diff
changeset
|
787 |
43076
2372284d9457
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|
788 |
34311
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diff
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|
789 def _isfullcopytraceable(repo, c1, base): |
45942
89a2afe31e82
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Augie Fackler <raf@durin42.com>
parents:
45892
diff
changeset
|
790 """Checks that if base, source and destination are all no-public branches, |
34366
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|
791 if yes let's use the full copytrace algorithm for increased capabilities |
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|
792 since it will be fast enough. |
34516
e79b3611223b
copies: add docs for config `experimental.copytrace.sourcecommitlimit`
Pulkit Goyal <7895pulkit@gmail.com>
parents:
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diff
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|
793 |
e79b3611223b
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diff
changeset
|
794 `experimental.copytrace.sourcecommitlimit` can be used to set a limit for |
e79b3611223b
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diff
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|
795 number of changesets from c1 to base such that if number of changesets are |
e79b3611223b
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diff
changeset
|
796 more than the limit, full copytracing algorithm won't be used. |
34288
fc3b8483c6cb
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diff
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|
797 """ |
34311
1826d695ad58
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|
798 if c1.rev() is None: |
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Pulkit Goyal <7895pulkit@gmail.com>
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|
799 c1 = c1.p1() |
34366
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diff
changeset
|
800 if c1.mutable() and base.mutable(): |
43076
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parents:
43020
diff
changeset
|
801 sourcecommitlimit = repo.ui.configint( |
43077
687b865b95ad
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Augie Fackler <augie@google.com>
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diff
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|
802 b'experimental', b'copytrace.sourcecommitlimit' |
43076
2372284d9457
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parents:
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diff
changeset
|
803 ) |
43077
687b865b95ad
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diff
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|
804 commits = len(repo.revs(b'%d::%d', base.rev(), c1.rev())) |
34311
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|
805 return commits < sourcecommitlimit |
34288
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copytrace: use the full copytracing method if only drafts are involved
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diff
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|
806 return False |
fc3b8483c6cb
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diff
changeset
|
807 |
43076
2372284d9457
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43020
diff
changeset
|
808 |
2372284d9457
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diff
changeset
|
809 def _checksinglesidecopies( |
2372284d9457
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43020
diff
changeset
|
810 src, dsts1, m1, m2, mb, c2, base, copy, renamedelete |
2372284d9457
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Augie Fackler <augie@google.com>
parents:
43020
diff
changeset
|
811 ): |
42222
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
42210
diff
changeset
|
812 if src not in m2: |
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
Martin von Zweigbergk <martinvonz@google.com>
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diff
changeset
|
813 # deleted on side 2 |
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
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42210
diff
changeset
|
814 if src not in m1: |
57203e0210f8
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parents:
42210
diff
changeset
|
815 # renamed on side 1, deleted on side 2 |
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
42210
diff
changeset
|
816 renamedelete[src] = dsts1 |
44210
d0c3eead515a
copies: fix crash when copy source is not in graft base
Martin von Zweigbergk <martinvonz@google.com>
parents:
44200
diff
changeset
|
817 elif src not in mb: |
d0c3eead515a
copies: fix crash when copy source is not in graft base
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parents:
44200
diff
changeset
|
818 # Work around the "short-circuit to avoid issues with merge states" |
d0c3eead515a
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Martin von Zweigbergk <martinvonz@google.com>
parents:
44200
diff
changeset
|
819 # thing in pathcopies(): pathcopies(x, y) can return a copy where the |
d0c3eead515a
copies: fix crash when copy source is not in graft base
Martin von Zweigbergk <martinvonz@google.com>
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44200
diff
changeset
|
820 # destination doesn't exist in y. |
d0c3eead515a
copies: fix crash when copy source is not in graft base
Martin von Zweigbergk <martinvonz@google.com>
parents:
44200
diff
changeset
|
821 pass |
44909
d452acc8cce8
flags: account for flag change when tracking rename relevant to merge
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
44276
diff
changeset
|
822 elif mb[src] != m2[src] and not _related(c2[src], base[src]): |
d452acc8cce8
flags: account for flag change when tracking rename relevant to merge
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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diff
changeset
|
823 return |
d452acc8cce8
flags: account for flag change when tracking rename relevant to merge
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
44276
diff
changeset
|
824 elif mb[src] != m2[src] or mb.flags(src) != m2.flags(src): |
42222
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
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diff
changeset
|
825 # modified on side 2 |
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
42210
diff
changeset
|
826 for dst in dsts1: |
44237
b4057d001760
merge: when rename was made on both sides, use ancestor as merge base
Martin von Zweigbergk <martinvonz@google.com>
parents:
44210
diff
changeset
|
827 copy[dst] = src |
42222
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
42210
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|
828 |
43076
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43020
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|
829 |
44199
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
830 class branch_copies(object): |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
831 """Information about copies made on one side of a merge/graft. |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
832 |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
833 "copy" is a mapping from destination name -> source name, |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
834 where source is in c1 and destination is in c2 or vice-versa. |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
835 |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
836 "movewithdir" is a mapping from source name -> destination name, |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
837 where the file at source present in one context but not the other |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
838 needs to be moved to destination by the merge process, because the |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
839 other context moved the directory it is in. |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
840 |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
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841 "renamedelete" is a mapping of source name -> list of destination |
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842 names for files deleted in c1 that were renamed in c2 or vice-versa. |
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843 |
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844 "dirmove" is a mapping of detected source dir -> destination dir renames. |
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845 This is needed for handling changes to new files previously grafted into |
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846 renamed directories. |
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847 """ |
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848 |
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849 def __init__( |
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850 self, copy=None, renamedelete=None, dirmove=None, movewithdir=None |
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851 ): |
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852 self.copy = {} if copy is None else copy |
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853 self.renamedelete = {} if renamedelete is None else renamedelete |
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854 self.dirmove = {} if dirmove is None else dirmove |
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855 self.movewithdir = {} if movewithdir is None else movewithdir |
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856 |
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857 def __repr__(self): |
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858 return '<branch_copies\n copy=%r\n renamedelete=%r\n dirmove=%r\n movewithdir=%r\n>' % ( |
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859 self.copy, |
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860 self.renamedelete, |
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861 self.dirmove, |
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862 self.movewithdir, |
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863 ) |
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864 |
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865 |
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866 def _fullcopytracing(repo, c1, c2, base): |
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867 """The full copytracing algorithm which finds all the new files that were |
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868 added from merge base up to the top commit and for each file it checks if |
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869 this file was copied from another file. |
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870 |
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871 This is pretty slow when a lot of changesets are involved but will track all |
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872 the copies. |
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873 """ |
6274
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874 m1 = c1.manifest() |
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875 m2 = c2.manifest() |
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876 mb = base.manifest() |
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877 |
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878 copies1 = pathcopies(base, c1) |
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879 copies2 = pathcopies(base, c2) |
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880 |
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881 if not (copies1 or copies2): |
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882 return branch_copies(), branch_copies(), {} |
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883 |
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884 inversecopies1 = {} |
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885 inversecopies2 = {} |
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886 for dst, src in copies1.items(): |
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887 inversecopies1.setdefault(src, []).append(dst) |
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888 for dst, src in copies2.items(): |
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889 inversecopies2.setdefault(src, []).append(dst) |
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890 |
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891 copy1 = {} |
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892 copy2 = {} |
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893 diverge = {} |
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894 renamedelete1 = {} |
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|
895 renamedelete2 = {} |
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896 allsources = set(inversecopies1) | set(inversecopies2) |
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897 for src in allsources: |
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898 dsts1 = inversecopies1.get(src) |
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899 dsts2 = inversecopies2.get(src) |
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|
900 if dsts1 and dsts2: |
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|
901 # copied/renamed on both sides |
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|
902 if src not in m1 and src not in m2: |
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|
903 # renamed on both sides |
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|
904 dsts1 = set(dsts1) |
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|
905 dsts2 = set(dsts2) |
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|
906 # If there's some overlap in the rename destinations, we |
57203e0210f8
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|
907 # consider it not divergent. For example, if side 1 copies 'a' |
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|
908 # to 'b' and 'c' and deletes 'a', and side 2 copies 'a' to 'c' |
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|
909 # and 'd' and deletes 'a'. |
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|
910 if dsts1 & dsts2: |
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|
911 for dst in dsts1 & dsts2: |
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|
912 copy1[dst] = src |
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|
913 copy2[dst] = src |
42222
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|
914 else: |
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|
915 diverge[src] = sorted(dsts1 | dsts2) |
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|
916 elif src in m1 and src in m2: |
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|
917 # copied on both sides |
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|
918 dsts1 = set(dsts1) |
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|
919 dsts2 = set(dsts2) |
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|
920 for dst in dsts1 & dsts2: |
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|
921 copy1[dst] = src |
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|
922 copy2[dst] = src |
42222
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|
923 # TODO: Handle cases where it was renamed on one side and copied |
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|
924 # on the other side |
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|
925 elif dsts1: |
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|
926 # copied/renamed only on side 1 |
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|
927 _checksinglesidecopies( |
44196
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|
928 src, dsts1, m1, m2, mb, c2, base, copy1, renamedelete1 |
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|
929 ) |
42222
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|
930 elif dsts2: |
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|
931 # copied/renamed only on side 2 |
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|
932 _checksinglesidecopies( |
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|
933 src, dsts2, m2, m1, mb, c1, base, copy2, renamedelete2 |
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|
934 ) |
42222
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|
935 |
26659
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|
936 # find interesting file sets from manifests |
46109
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|
937 cache = [] |
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|
938 |
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|
939 def _get_addedfiles(idx): |
2f357d053df2
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|
940 if not cache: |
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|
941 addedinm1 = m1.filesnotin(mb, repo.narrowmatch()) |
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|
942 addedinm2 = m2.filesnotin(mb, repo.narrowmatch()) |
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|
943 u1 = sorted(addedinm1 - addedinm2) |
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|
944 u2 = sorted(addedinm2 - addedinm1) |
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|
945 cache.extend((u1, u2)) |
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|
946 return cache[idx] |
42223
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|
947 |
46109
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|
948 u1fn = lambda: _get_addedfiles(0) |
2f357d053df2
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|
949 u2fn = lambda: _get_addedfiles(1) |
2f357d053df2
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|
950 if repo.ui.debugflag: |
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951 u1 = u1fn() |
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952 u2 = u2fn() |
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953 |
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954 header = b" unmatched files in %s" |
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955 if u1: |
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956 repo.ui.debug( |
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957 b"%s:\n %s\n" % (header % b'local', b"\n ".join(u1)) |
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958 ) |
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959 if u2: |
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960 repo.ui.debug( |
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961 b"%s:\n %s\n" % (header % b'other', b"\n ".join(u2)) |
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962 ) |
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963 |
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964 renamedeleteset = set() |
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965 divergeset = set() |
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966 for dsts in diverge.values(): |
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967 divergeset.update(dsts) |
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968 for dsts in renamedelete1.values(): |
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969 renamedeleteset.update(dsts) |
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970 for dsts in renamedelete2.values(): |
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971 renamedeleteset.update(dsts) |
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972 |
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973 repo.ui.debug( |
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974 b" all copies found (* = to merge, ! = divergent, " |
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975 b"% = renamed and deleted):\n" |
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976 ) |
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977 for side, copies in ((b"local", copies1), (b"remote", copies2)): |
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978 if not copies: |
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979 continue |
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980 repo.ui.debug(b" on %s side:\n" % side) |
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981 for f in sorted(copies): |
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982 note = b"" |
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983 if f in copy1 or f in copy2: |
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984 note += b"*" |
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985 if f in divergeset: |
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986 note += b"!" |
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987 if f in renamedeleteset: |
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988 note += b"%" |
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989 repo.ui.debug( |
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990 b" src: '%s' -> dst: '%s' %s\n" % (copies[f], f, note) |
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991 ) |
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992 del renamedeleteset |
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993 del divergeset |
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994 |
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995 repo.ui.debug(b" checking for directory renames\n") |
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996 |
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997 dirmove1, movewithdir2 = _dir_renames(repo, c1, copy1, copies1, u2fn) |
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998 dirmove2, movewithdir1 = _dir_renames(repo, c2, copy2, copies2, u1fn) |
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999 |
44200
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|
1000 branch_copies1 = branch_copies(copy1, renamedelete1, dirmove1, movewithdir1) |
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1001 branch_copies2 = branch_copies(copy2, renamedelete2, dirmove2, movewithdir2) |
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1002 |
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1003 return branch_copies1, branch_copies2, diverge |
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1004 |
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1005 |
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1006 def _dir_renames(repo, ctx, copy, fullcopy, addedfilesfn): |
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1007 """Finds moved directories and files that should move with them. |
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1008 |
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1009 ctx: the context for one of the sides |
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1010 copy: files copied on the same side (as ctx) |
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1011 fullcopy: files copied on the same side (as ctx), including those that |
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1012 merge.manifestmerge() won't care about |
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1013 addedfilesfn: function returning added files on the other side (compared to |
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1014 ctx) |
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1015 """ |
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1016 # generate a directory move map |
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1017 invalid = set() |
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1018 dirmove = {} |
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1019 |
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1020 # examine each file copy for a potential directory move, which is |
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1021 # when all the files in a directory are moved to a new directory |
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1022 for dst, src in pycompat.iteritems(fullcopy): |
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|
1023 dsrc, ddst = pathutil.dirname(src), pathutil.dirname(dst) |
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1024 if dsrc in invalid: |
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1025 # already seen to be uninteresting |
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1026 continue |
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1027 elif ctx.hasdir(dsrc) and ctx.hasdir(ddst): |
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1028 # directory wasn't entirely moved locally |
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1029 invalid.add(dsrc) |
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1030 elif dsrc in dirmove and dirmove[dsrc] != ddst: |
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1031 # files from the same directory moved to two different places |
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1032 invalid.add(dsrc) |
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1033 else: |
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1034 # looks good so far |
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1035 dirmove[dsrc] = ddst |
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1036 |
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1037 for i in invalid: |
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1038 if i in dirmove: |
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1039 del dirmove[i] |
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1040 del invalid |
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1041 |
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1042 if not dirmove: |
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1043 return {}, {} |
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1044 |
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1045 dirmove = {k + b"/": v + b"/" for k, v in pycompat.iteritems(dirmove)} |
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1046 |
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1047 for d in dirmove: |
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1048 repo.ui.debug( |
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1049 b" discovered dir src: '%s' -> dst: '%s'\n" % (d, dirmove[d]) |
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1050 ) |
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1051 |
30183
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|
1052 movewithdir = {} |
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1053 # check unaccounted nonoverlapping files against directory moves |
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1054 for f in addedfilesfn(): |
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1055 if f not in fullcopy: |
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1056 for d in dirmove: |
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1057 if f.startswith(d): |
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1058 # new file added in a directory that was moved, move it |
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1059 df = dirmove[d] + f[len(d) :] |
6426
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|
1060 if df not in copy: |
18134
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1061 movewithdir[f] = df |
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|
1062 repo.ui.debug( |
43117
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1063 b" pending file src: '%s' -> dst: '%s'\n" |
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1064 % (f, df) |
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1065 ) |
6274
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1066 break |
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1067 |
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1068 return dirmove, movewithdir |
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1069 |
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1070 |
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1071 def _heuristicscopytracing(repo, c1, c2, base): |
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1072 """Fast copytracing using filename heuristics |
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1073 |
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1074 Assumes that moves or renames are of following two types: |
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1075 |
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1076 1) Inside a directory only (same directory name but different filenames) |
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1077 2) Move from one directory to another |
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1078 (same filenames but different directory names) |
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1079 |
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1080 Works only when there are no merge commits in the "source branch". |
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1081 Source branch is commits from base up to c2 not including base. |
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1082 |
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1083 If merge is involved it fallbacks to _fullcopytracing(). |
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1084 |
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1085 Can be used by setting the following config: |
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1086 |
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1087 [experimental] |
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1088 copytrace = heuristics |
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1089 |
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1090 In some cases the copy/move candidates found by heuristics can be very large |
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1091 in number and that will make the algorithm slow. The number of possible |
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1092 candidates to check can be limited by using the config |
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1093 `experimental.copytrace.movecandidateslimit` which defaults to 100. |
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1094 """ |
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1095 |
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1096 if c1.rev() is None: |
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1097 c1 = c1.p1() |
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1098 if c2.rev() is None: |
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1099 c2 = c2.p1() |
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1100 |
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1101 changedfiles = set() |
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1102 m1 = c1.manifest() |
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1103 if not repo.revs(b'%d::%d', base.rev(), c2.rev()): |
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1104 # If base is not in c2 branch, we switch to fullcopytracing |
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1105 repo.ui.debug( |
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1106 b"switching to full copytracing as base is not " |
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1107 b"an ancestor of c2\n" |
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1108 ) |
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1109 return _fullcopytracing(repo, c1, c2, base) |
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1110 |
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1111 ctx = c2 |
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1112 while ctx != base: |
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1113 if len(ctx.parents()) == 2: |
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1114 # To keep things simple let's not handle merges |
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1115 repo.ui.debug(b"switching to full copytracing because of merges\n") |
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1116 return _fullcopytracing(repo, c1, c2, base) |
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1117 changedfiles.update(ctx.files()) |
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1118 ctx = ctx.p1() |
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1119 |
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1120 copies2 = {} |
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1121 cp = _forwardcopies(base, c2) |
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1122 for dst, src in pycompat.iteritems(cp): |
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1123 if src in m1: |
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1124 copies2[dst] = src |
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1125 |
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1126 # file is missing if it isn't present in the destination, but is present in |
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1127 # the base and present in the source. |
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1128 # Presence in the base is important to exclude added files, presence in the |
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1129 # source is important to exclude removed files. |
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1130 filt = lambda f: f not in m1 and f in base and f in c2 |
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1131 missingfiles = [f for f in changedfiles if filt(f)] |
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1132 |
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1133 copies1 = {} |
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1134 if missingfiles: |
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1135 basenametofilename = collections.defaultdict(list) |
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1136 dirnametofilename = collections.defaultdict(list) |
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1137 |
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1138 for f in m1.filesnotin(base.manifest()): |
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1139 basename = os.path.basename(f) |
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1140 dirname = os.path.dirname(f) |
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1141 basenametofilename[basename].append(f) |
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1142 dirnametofilename[dirname].append(f) |
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1143 |
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1144 for f in missingfiles: |
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1145 basename = os.path.basename(f) |
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1146 dirname = os.path.dirname(f) |
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1147 samebasename = basenametofilename[basename] |
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1148 samedirname = dirnametofilename[dirname] |
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1149 movecandidates = samebasename + samedirname |
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1150 # f is guaranteed to be present in c2, that's why |
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1151 # c2.filectx(f) won't fail |
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1152 f2 = c2.filectx(f) |
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1153 # we can have a lot of candidates which can slow down the heuristics |
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1154 # config value to limit the number of candidates moves to check |
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1155 maxcandidates = repo.ui.configint( |
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1156 b'experimental', b'copytrace.movecandidateslimit' |
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1157 ) |
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1158 |
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1159 if len(movecandidates) > maxcandidates: |
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1160 repo.ui.status( |
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1161 _( |
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1162 b"skipping copytracing for '%s', more " |
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1163 b"candidates than the limit: %d\n" |
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1164 ) |
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1165 % (f, len(movecandidates)) |
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1166 ) |
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1167 continue |
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1168 |
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1169 for candidate in movecandidates: |
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1170 f1 = c1.filectx(candidate) |
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1171 if _related(f1, f2): |
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1172 # if there are a few related copies then we'll merge |
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1173 # changes into all of them. This matches the behaviour |
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1174 # of upstream copytracing |
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1175 copies1[candidate] = f |
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1176 |
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1177 return branch_copies(copies1), branch_copies(copies2), {} |
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1178 |
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1179 |
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1180 def _related(f1, f2): |
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1181 """return True if f1 and f2 filectx have a common ancestor |
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1182 |
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1183 Walk back to common ancestor to see if the two files originate |
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1184 from the same file. Since workingfilectx's rev() is None it messes |
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1185 up the integer comparison logic, hence the pre-step check for |
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1186 None (f1 and f2 can only be workingfilectx's initially). |
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1187 """ |
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1188 |
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1189 if f1 == f2: |
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1190 return True # a match |
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1191 |
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1192 g1, g2 = f1.ancestors(), f2.ancestors() |
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1193 try: |
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1194 f1r, f2r = f1.linkrev(), f2.linkrev() |
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1195 |
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1196 if f1r is None: |
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1197 f1 = next(g1) |
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1198 if f2r is None: |
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1199 f2 = next(g2) |
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1200 |
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1201 while True: |
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1202 f1r, f2r = f1.linkrev(), f2.linkrev() |
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1203 if f1r > f2r: |
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1204 f1 = next(g1) |
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1205 elif f2r > f1r: |
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1206 f2 = next(g2) |
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1207 else: # f1 and f2 point to files in the same linkrev |
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1208 return f1 == f2 # true if they point to the same file |
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1209 except StopIteration: |
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1210 return False |
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1211 |
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1212 |
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1213 def graftcopies(wctx, ctx, base): |
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1214 """reproduce copies between base and ctx in the wctx |
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1215 |
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1216 Unlike mergecopies(), this function will only consider copies between base |
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1217 and ctx; it will ignore copies between base and wctx. Also unlike |
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1218 mergecopies(), this function will apply copies to the working copy (instead |
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1219 of just returning information about the copies). That makes it cheaper |
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1220 (especially in the common case of base==ctx.p1()) and useful also when |
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1221 experimental.copytrace=off. |
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1222 |
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1223 merge.update() will have already marked most copies, but it will only |
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1224 mark copies if it thinks the source files are related (see |
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1225 merge._related()). It will also not mark copies if the file wasn't modified |
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1226 on the local side. This function adds the copies that were "missed" |
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1227 by merge.update(). |
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1228 """ |
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1229 new_copies = pathcopies(base, ctx) |
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1230 parent = wctx.p1() |
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1231 _filter(parent, wctx, new_copies) |
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1232 # extra filtering to drop copy information for files that existed before |
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1233 # the graft (otherwise we would create merge filelog for non-merge commit |
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1234 for dest, __ in list(new_copies.items()): |
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1235 if dest in parent: |
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1236 del new_copies[dest] |
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1237 for dst, src in pycompat.iteritems(new_copies): |
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1238 wctx[dst].markcopied(src) |