Mercurial > hg
annotate mercurial/copies.py @ 50896:b2b8c25f9462
hgwebmod: use sysstr to check for attribute presence
We do not need bytes here.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Wed, 30 Aug 2023 13:28:09 +0200 |
parents | 642e31cb55f0 |
children | 493034cc3265 |
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 Olivia Mackall <olivia@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 |
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10 import collections |
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11 import os |
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12 |
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13 from .i18n import _ |
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14 from .node import nullrev |
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15 |
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16 from . import ( |
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17 match as matchmod, |
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18 pathutil, |
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19 policy, |
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20 util, |
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21 ) |
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22 |
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23 |
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24 from .utils import stringutil |
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25 |
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26 from .revlogutils import ( |
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27 flagutil, |
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28 sidedata as sidedatamod, |
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29 ) |
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30 |
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31 rustmod = policy.importrust("copy_tracing") |
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32 |
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33 |
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34 def _filter(src, dst, t): |
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35 """filters out invalid copies after chaining""" |
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36 |
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37 # When _chain()'ing copies in 'a' (from 'src' via some other commit 'mid') |
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38 # with copies in 'b' (from 'mid' to 'dst'), we can get the different cases |
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39 # in the following table (not including trivial cases). For example, case 6 |
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40 # is where a file existed in 'src' and remained under that name in 'mid' and |
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41 # then was renamed between 'mid' and 'dst'. |
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42 # |
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43 # case src mid dst result |
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44 # 1 x y - - |
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45 # 2 x y y x->y |
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46 # 3 x y x - |
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47 # 4 x y z x->z |
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48 # 5 - x y - |
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49 # 6 x x y x->y |
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50 # |
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51 # _chain() takes care of chaining the copies in 'a' and 'b', but it |
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52 # cannot tell the difference between cases 1 and 2, between 3 and 4, or |
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53 # between 5 and 6, so it includes all cases in its result. |
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54 # Cases 1, 3, and 5 are then removed by _filter(). |
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55 |
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56 for k, v in list(t.items()): |
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57 if k == v: # case 3 |
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58 del t[k] |
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59 elif v not in src: # case 5 |
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60 # remove copies from files that didn't exist |
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61 del t[k] |
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62 elif k not in dst: # case 1 |
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63 # remove copies to files that were then removed |
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64 del t[k] |
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65 |
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66 |
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67 def _chain(prefix, suffix): |
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68 """chain two sets of copies 'prefix' and 'suffix'""" |
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69 result = prefix.copy() |
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70 for key, value in suffix.items(): |
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71 result[key] = prefix.get(value, value) |
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72 return result |
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73 |
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74 |
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75 def _tracefile(fctx, am, basemf): |
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76 """return file context that is the ancestor of fctx present in ancestor |
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77 manifest am |
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78 |
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79 Note: we used to try and stop after a given limit, however checking if that |
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80 limit is reached turned out to be very expensive. we are better off |
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81 disabling that feature.""" |
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82 |
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83 for f in fctx.ancestors(): |
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84 path = f.path() |
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85 if am.get(path, None) == f.filenode(): |
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86 return path |
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87 if basemf and basemf.get(path, None) == f.filenode(): |
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88 return path |
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89 |
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90 |
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91 def _dirstatecopies(repo, match=None): |
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92 ds = repo.dirstate |
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93 c = ds.copies().copy() |
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94 for k in list(c): |
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95 if not ds.get_entry(k).tracked or (match and not match(k)): |
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96 del c[k] |
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97 return c |
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98 |
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99 |
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100 def _computeforwardmissing(a, b, match=None): |
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101 """Computes which files are in b but not a. |
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102 This is its own function so extensions can easily wrap this call to see what |
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103 files _forwardcopies is about to process. |
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104 """ |
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105 ma = a.manifest() |
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106 mb = b.manifest() |
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107 return mb.filesnotin(ma, match=match) |
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108 |
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109 |
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110 def usechangesetcentricalgo(repo): |
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111 """Checks if we should use changeset-centric copy algorithms""" |
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112 if repo.filecopiesmode == b'changeset-sidedata': |
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113 return True |
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114 readfrom = repo.ui.config(b'experimental', b'copies.read-from') |
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115 changesetsource = (b'changeset-only', b'compatibility') |
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116 return readfrom in changesetsource |
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117 |
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118 |
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119 def _committedforwardcopies(a, b, base, match): |
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120 """Like _forwardcopies(), but b.rev() cannot be None (working copy)""" |
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121 # files might have to be traced back to the fctx parent of the last |
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122 # one-side-only changeset, but not further back than that |
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123 repo = a._repo |
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124 |
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125 if usechangesetcentricalgo(repo): |
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126 return _changesetforwardcopies(a, b, match) |
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127 |
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128 debug = repo.ui.debugflag and repo.ui.configbool(b'devel', b'debug.copies') |
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129 dbg = repo.ui.debug |
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130 if debug: |
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131 dbg(b'debug.copies: looking into rename from %s to %s\n' % (a, b)) |
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132 am = a.manifest() |
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133 basemf = None if base is None else base.manifest() |
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134 |
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135 # find where new files came from |
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136 # we currently don't try to find where old files went, too expensive |
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137 # this means we can miss a case like 'hg rm b; hg cp a b' |
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138 cm = {} |
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139 |
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140 # Computing the forward missing is quite expensive on large manifests, since |
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141 # it compares the entire manifests. We can optimize it in the common use |
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142 # case of computing what copies are in a commit versus its parent (like |
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143 # during a rebase or histedit). Note, we exclude merge commits from this |
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144 # optimization, since the ctx.files() for a merge commit is not correct for |
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145 # this comparison. |
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146 forwardmissingmatch = match |
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147 if b.p1() == a and b.p2().rev() == nullrev: |
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148 filesmatcher = matchmod.exact(b.files()) |
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149 forwardmissingmatch = matchmod.intersectmatchers(match, filesmatcher) |
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150 if repo.ui.configbool(b'devel', b'copy-tracing.trace-all-files'): |
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151 missing = list(b.walk(match)) |
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152 # _computeforwardmissing(a, b, match=forwardmissingmatch) |
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153 if debug: |
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154 dbg(b'debug.copies: searching all files: %d\n' % len(missing)) |
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155 else: |
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156 missing = _computeforwardmissing(a, b, match=forwardmissingmatch) |
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157 if debug: |
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158 dbg( |
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159 b'debug.copies: missing files to search: %d\n' |
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160 % len(missing) |
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161 ) |
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162 |
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163 ancestrycontext = a._repo.changelog.ancestors([b.rev()], inclusive=True) |
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164 |
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165 for f in sorted(missing): |
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166 if debug: |
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167 dbg(b'debug.copies: tracing file: %s\n' % f) |
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168 fctx = b[f] |
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169 fctx._ancestrycontext = ancestrycontext |
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170 |
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171 if debug: |
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172 start = util.timer() |
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173 opath = _tracefile(fctx, am, basemf) |
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174 if opath: |
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175 if debug: |
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176 dbg(b'debug.copies: rename of: %s\n' % opath) |
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177 cm[f] = opath |
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178 if debug: |
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179 dbg( |
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180 b'debug.copies: time: %f seconds\n' |
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181 % (util.timer() - start) |
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182 ) |
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183 return cm |
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184 |
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185 |
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186 def _revinfo_getter(repo, match): |
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187 """returns a function that returns the following data given a <rev>" |
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188 |
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189 * p1: revision number of first parent |
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190 * p2: revision number of first parent |
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191 * changes: a ChangingFiles object |
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192 """ |
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193 cl = repo.changelog |
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194 parents = cl.parentrevs |
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195 flags = cl.flags |
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196 |
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197 HASCOPIESINFO = flagutil.REVIDX_HASCOPIESINFO |
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198 |
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199 changelogrevision = cl.changelogrevision |
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200 |
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201 if rustmod is not None: |
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202 |
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203 def revinfo(rev): |
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204 p1, p2 = parents(rev) |
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205 if flags(rev) & HASCOPIESINFO: |
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206 raw = changelogrevision(rev)._sidedata.get(sidedatamod.SD_FILES) |
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207 else: |
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208 raw = None |
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209 return (p1, p2, raw) |
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210 |
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211 else: |
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212 |
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213 def revinfo(rev): |
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214 p1, p2 = parents(rev) |
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215 if flags(rev) & HASCOPIESINFO: |
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216 changes = changelogrevision(rev).changes |
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217 else: |
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218 changes = None |
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219 return (p1, p2, changes) |
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220 |
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221 return revinfo |
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222 |
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223 |
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224 def cached_is_ancestor(is_ancestor): |
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225 """return a cached version of is_ancestor""" |
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226 cache = {} |
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227 |
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228 def _is_ancestor(anc, desc): |
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229 if anc > desc: |
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230 return False |
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231 elif anc == desc: |
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232 return True |
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233 key = (anc, desc) |
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234 ret = cache.get(key) |
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235 if ret is None: |
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236 ret = cache[key] = is_ancestor(anc, desc) |
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237 return ret |
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238 |
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239 return _is_ancestor |
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240 |
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241 |
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242 def _changesetforwardcopies(a, b, match): |
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243 if a.rev() in (nullrev, b.rev()): |
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244 return {} |
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245 |
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246 repo = a.repo().unfiltered() |
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247 |
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248 cl = repo.changelog |
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249 isancestor = cl.isancestorrev |
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250 |
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251 # To track rename from "A" to B, we need to gather all parent → children |
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252 # edges that are contains in `::B` but not in `::A`. |
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253 # |
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254 # |
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255 # To do so, we need to gather all revisions exclusive¹ to "B" (ie¹: `::b - |
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256 # ::a`) and also all the "roots point", ie the parents of the exclusive set |
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257 # that belong to ::a. These are exactly all the revisions needed to express |
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258 # the parent → children we need to combine. |
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259 # |
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260 # [1] actually, we need to gather all the edges within `(::a)::b`, ie: |
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261 # excluding paths that leads to roots that are not ancestors of `a`. We |
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262 # keep this out of the explanation because it is hard enough without this special case.. |
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263 |
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264 parents = cl._uncheckedparentrevs |
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265 graph_roots = (nullrev, nullrev) |
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266 |
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267 ancestors = cl.ancestors([a.rev()], inclusive=True) |
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268 revs = cl.findmissingrevs(common=[a.rev()], heads=[b.rev()]) |
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269 roots = set() |
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270 has_graph_roots = False |
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271 multi_thread = repo.ui.configbool(b'devel', b'copy-tracing.multi-thread') |
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272 |
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273 # iterate over `only(B, A)` |
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274 for r in revs: |
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275 ps = parents(r) |
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276 if ps == graph_roots: |
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277 has_graph_roots = True |
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278 else: |
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279 p1, p2 = ps |
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280 |
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281 # find all the "root points" (see larger comment above) |
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282 if p1 != nullrev and p1 in ancestors: |
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283 roots.add(p1) |
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284 if p2 != nullrev and p2 in ancestors: |
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285 roots.add(p2) |
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286 if not roots: |
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287 # no common revision to track copies from |
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288 return {} |
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289 if has_graph_roots: |
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290 # this deal with the special case mentioned in the [1] footnotes. We |
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291 # must filter out revisions that leads to non-common graphroots. |
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292 roots = list(roots) |
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293 m = min(roots) |
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294 h = [b.rev()] |
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295 roots_to_head = cl.reachableroots(m, h, roots, includepath=True) |
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296 roots_to_head = set(roots_to_head) |
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297 revs = [r for r in revs if r in roots_to_head] |
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298 |
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299 if repo.filecopiesmode == b'changeset-sidedata': |
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300 # When using side-data, we will process the edges "from" the children. |
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301 # We iterate over the children, gathering previous collected data for |
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302 # the parents. Do know when the parents data is no longer necessary, we |
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303 # keep a counter of how many children each revision has. |
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304 # |
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305 # An interesting property of `children_count` is that it only contains |
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306 # revision that will be relevant for a edge of the graph. So if a |
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307 # children has parent not in `children_count`, that edges should not be |
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308 # processed. |
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309 children_count = dict((r, 0) for r in roots) |
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310 for r in revs: |
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311 for p in cl.parentrevs(r): |
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312 if p == nullrev: |
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313 continue |
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314 children_count[r] = 0 |
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315 if p in children_count: |
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316 children_count[p] += 1 |
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317 revinfo = _revinfo_getter(repo, match) |
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318 with repo.changelog.reading(): |
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319 return _combine_changeset_copies( |
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320 revs, |
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321 children_count, |
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322 b.rev(), |
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323 revinfo, |
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324 match, |
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325 isancestor, |
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326 multi_thread, |
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327 ) |
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328 else: |
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329 # When not using side-data, we will process the edges "from" the parent. |
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330 # so we need a full mapping of the parent -> children relation. |
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331 children = dict((r, []) for r in roots) |
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332 for r in revs: |
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333 for p in cl.parentrevs(r): |
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334 if p == nullrev: |
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335 continue |
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336 children[r] = [] |
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337 if p in children: |
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338 children[p].append(r) |
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339 x = revs.pop() |
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340 assert x == b.rev() |
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341 revs.extend(roots) |
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342 revs.sort() |
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343 |
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344 revinfo = _revinfo_getter_extra(repo) |
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345 return _combine_changeset_copies_extra( |
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346 revs, children, b.rev(), revinfo, match, isancestor |
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347 ) |
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348 |
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349 |
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350 def _combine_changeset_copies( |
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351 revs, children_count, targetrev, revinfo, match, isancestor, multi_thread |
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352 ): |
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353 """combine the copies information for each item of iterrevs |
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354 |
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355 revs: sorted iterable of revision to visit |
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356 children_count: a {parent: <number-of-relevant-children>} mapping. |
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357 targetrev: the final copies destination revision (not in iterrevs) |
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358 revinfo(rev): a function that return (p1, p2, p1copies, p2copies, removed) |
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359 match: a matcher |
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360 |
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361 It returns the aggregated copies information for `targetrev`. |
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362 """ |
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363 |
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364 alwaysmatch = match.always() |
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365 |
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366 if rustmod is not None: |
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367 final_copies = rustmod.combine_changeset_copies( |
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368 list(revs), children_count, targetrev, revinfo, multi_thread |
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369 ) |
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370 else: |
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371 isancestor = cached_is_ancestor(isancestor) |
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372 |
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373 all_copies = {} |
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374 # iterate over all the "children" side of copy tracing "edge" |
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375 for current_rev in revs: |
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376 p1, p2, changes = revinfo(current_rev) |
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377 current_copies = None |
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378 # iterate over all parents to chain the existing data with the |
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379 # data from the parent → child edge. |
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380 for parent, parent_rev in ((1, p1), (2, p2)): |
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381 if parent_rev == nullrev: |
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382 continue |
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383 remaining_children = children_count.get(parent_rev) |
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384 if remaining_children is None: |
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385 continue |
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386 remaining_children -= 1 |
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387 children_count[parent_rev] = remaining_children |
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388 if remaining_children: |
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389 copies = all_copies.get(parent_rev, None) |
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390 else: |
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391 copies = all_copies.pop(parent_rev, None) |
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392 |
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393 if copies is None: |
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394 # this is a root |
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395 newcopies = copies = {} |
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396 elif remaining_children: |
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397 newcopies = copies.copy() |
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398 else: |
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399 newcopies = copies |
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400 # chain the data in the edge with the existing data |
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401 if changes is not None: |
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402 childcopies = {} |
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403 if parent == 1: |
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404 childcopies = changes.copied_from_p1 |
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405 elif parent == 2: |
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406 childcopies = changes.copied_from_p2 |
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407 |
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408 if childcopies: |
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409 newcopies = copies.copy() |
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410 for dest, source in childcopies.items(): |
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411 prev = copies.get(source) |
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412 if prev is not None and prev[1] is not None: |
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413 source = prev[1] |
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414 newcopies[dest] = (current_rev, source) |
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415 assert newcopies is not copies |
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416 if changes.removed: |
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417 for f in changes.removed: |
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418 if f in newcopies: |
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419 if newcopies is copies: |
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420 # copy on write to avoid affecting potential other |
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421 # branches. when there are no other branches, this |
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422 # could be avoided. |
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423 newcopies = copies.copy() |
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424 newcopies[f] = (current_rev, None) |
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425 # check potential need to combine the data from another parent (for |
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426 # that child). See comment below for details. |
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427 if current_copies is None: |
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428 current_copies = newcopies |
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429 else: |
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430 # we are the second parent to work on c, we need to merge our |
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431 # work with the other. |
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432 # |
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433 # In case of conflict, parent 1 take precedence over parent 2. |
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434 # This is an arbitrary choice made anew when implementing |
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435 # changeset based copies. It was made without regards with |
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436 # potential filelog related behavior. |
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437 assert parent == 2 |
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438 current_copies = _merge_copies_dict( |
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439 newcopies, |
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440 current_copies, |
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441 isancestor, |
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442 changes, |
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443 current_rev, |
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444 ) |
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445 all_copies[current_rev] = current_copies |
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446 |
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447 # filter out internal details and return a {dest: source mapping} |
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448 final_copies = {} |
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449 |
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450 targetrev_items = all_copies[targetrev] |
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451 assert targetrev_items is not None # help pytype |
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452 |
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453 for dest, (tt, source) in targetrev_items.items(): |
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454 if source is not None: |
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455 final_copies[dest] = source |
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456 if not alwaysmatch: |
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457 for filename in list(final_copies.keys()): |
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458 if not match(filename): |
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459 del final_copies[filename] |
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460 return final_copies |
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461 |
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462 |
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463 # constant to decide which side to pick with _merge_copies_dict |
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464 PICK_MINOR = 0 |
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465 PICK_MAJOR = 1 |
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466 PICK_EITHER = 2 |
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467 |
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468 |
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469 def _merge_copies_dict(minor, major, isancestor, changes, current_merge): |
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470 """merge two copies-mapping together, minor and major |
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471 |
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472 In case of conflict, value from "major" will be picked. |
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473 |
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474 - `isancestors(low_rev, high_rev)`: callable return True if `low_rev` is an |
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475 ancestors of `high_rev`, |
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476 |
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477 - `ismerged(path)`: callable return True if `path` have been merged in the |
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478 current revision, |
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479 |
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480 return the resulting dict (in practice, the "minor" object, updated) |
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481 """ |
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482 for dest, value in major.items(): |
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483 other = minor.get(dest) |
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484 if other is None: |
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485 minor[dest] = value |
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486 else: |
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487 pick, overwrite = _compare_values( |
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488 changes, isancestor, dest, other, value |
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489 ) |
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490 if overwrite: |
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491 if pick == PICK_MAJOR: |
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492 minor[dest] = (current_merge, value[1]) |
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493 else: |
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494 minor[dest] = (current_merge, other[1]) |
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495 elif pick == PICK_MAJOR: |
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496 minor[dest] = value |
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497 return minor |
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498 |
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499 |
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500 def _compare_values(changes, isancestor, dest, minor, major): |
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501 """compare two value within a _merge_copies_dict loop iteration |
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502 |
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503 return (pick, overwrite). |
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504 |
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505 - pick is one of PICK_MINOR, PICK_MAJOR or PICK_EITHER |
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506 - overwrite is True if pick is a return of an ambiguity that needs resolution. |
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507 """ |
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508 major_tt, major_value = major |
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509 minor_tt, minor_value = minor |
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510 |
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511 if major_tt == minor_tt: |
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512 # if it comes from the same revision it must be the same value |
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513 assert major_value == minor_value |
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514 return PICK_EITHER, False |
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515 elif ( |
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516 changes is not None |
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517 and minor_value is not None |
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518 and major_value is None |
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519 and dest in changes.salvaged |
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520 ): |
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521 # In this case, a deletion was reverted, the "alive" value overwrite |
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522 # the deleted one. |
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523 return PICK_MINOR, True |
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524 elif ( |
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525 changes is not None |
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526 and major_value is not None |
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527 and minor_value is None |
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diff
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|
528 and dest in changes.salvaged |
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529 ): |
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530 # In this case, a deletion was reverted, the "alive" value overwrite |
c692384bb559
copies: rearrange all value comparison conditional
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|
531 # the deleted one. |
46563
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parents:
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diff
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532 return PICK_MAJOR, True |
46562
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533 elif isancestor(minor_tt, major_tt): |
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|
534 if changes is not None and dest in changes.merged: |
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535 # change to dest happened on the branch without copy-source change, |
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536 # so both source are valid and "major" wins. |
46563
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537 return PICK_MAJOR, True |
46562
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538 else: |
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|
539 return PICK_MAJOR, False |
46562
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copies: rearrange all value comparison conditional
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changeset
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540 elif isancestor(major_tt, minor_tt): |
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541 if changes is not None and dest in changes.merged: |
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542 # change to dest happened on the branch without copy-source change, |
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543 # so both source are valid and "major" wins. |
46563
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544 return PICK_MAJOR, True |
46562
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copies: rearrange all value comparison conditional
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545 else: |
46563
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diff
changeset
|
546 return PICK_MINOR, False |
46562
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parents:
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547 elif minor_value is None: |
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548 # in case of conflict, the "alive" side wins. |
46563
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changeset
|
549 return PICK_MAJOR, True |
46562
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changeset
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550 elif major_value is None: |
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551 # in case of conflict, the "alive" side wins. |
46563
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|
552 return PICK_MINOR, True |
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553 else: |
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554 # in case of conflict where both side are alive, major wins. |
46563
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copies: detect case when a merge decision overwrite previous data
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changeset
|
555 return PICK_MAJOR, True |
46161
3a0c41336961
copies: extract value comparison in the python copy tracing
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
46159
diff
changeset
|
556 |
3a0c41336961
copies: extract value comparison in the python copy tracing
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
46159
diff
changeset
|
557 |
45638
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Pierre-Yves David <pierre-yves.david@octobus.net>
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changeset
|
558 def _revinfo_getter_extra(repo): |
4f876e6b30fa
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changeset
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559 """return a function that return multiple data given a <rev>"i |
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560 |
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changeset
|
561 * p1: revision number of first parent |
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parents:
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changeset
|
562 * p2: revision number of first parent |
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|
563 * p1copies: mapping of copies from p1 |
4f876e6b30fa
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parents:
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diff
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|
564 * p2copies: mapping of copies from p2 |
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|
565 * removed: a list of removed files |
4f876e6b30fa
copies: use dedicated `_revinfo_getter` function and call
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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diff
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|
566 * ismerged: a callback to know if file was merged in that revision |
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copies: use dedicated `_revinfo_getter` function and call
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|
567 """ |
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|
568 cl = repo.changelog |
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Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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diff
changeset
|
569 parents = cl.parentrevs |
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copies: use dedicated `_revinfo_getter` function and call
Pierre-Yves David <pierre-yves.david@octobus.net>
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diff
changeset
|
570 |
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parents:
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|
571 def get_ismerged(rev): |
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572 ctx = repo[rev] |
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diff
changeset
|
573 |
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copies: use dedicated `_revinfo_getter` function and call
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parents:
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diff
changeset
|
574 def ismerged(path): |
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parents:
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diff
changeset
|
575 if path not in ctx.files(): |
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copies: use dedicated `_revinfo_getter` function and call
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parents:
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|
576 return False |
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parents:
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diff
changeset
|
577 fctx = ctx[path] |
4f876e6b30fa
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parents:
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diff
changeset
|
578 parents = fctx._filelog.parents(fctx._filenode) |
4f876e6b30fa
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Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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diff
changeset
|
579 nb_parents = 0 |
4f876e6b30fa
copies: use dedicated `_revinfo_getter` function and call
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
45637
diff
changeset
|
580 for n in parents: |
47012
d55b71393907
node: replace nullid and friends with nodeconstants class
Joerg Sonnenberger <joerg@bec.de>
parents:
46843
diff
changeset
|
581 if n != repo.nullid: |
45638
4f876e6b30fa
copies: use dedicated `_revinfo_getter` function and call
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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diff
changeset
|
582 nb_parents += 1 |
4f876e6b30fa
copies: use dedicated `_revinfo_getter` function and call
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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diff
changeset
|
583 return nb_parents >= 2 |
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copies: use dedicated `_revinfo_getter` function and call
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parents:
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changeset
|
584 |
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Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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diff
changeset
|
585 return ismerged |
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parents:
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diff
changeset
|
586 |
4f876e6b30fa
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parents:
45637
diff
changeset
|
587 def revinfo(rev): |
4f876e6b30fa
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parents:
45637
diff
changeset
|
588 p1, p2 = parents(rev) |
4f876e6b30fa
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parents:
45637
diff
changeset
|
589 ctx = repo[rev] |
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parents:
45637
diff
changeset
|
590 p1copies, p2copies = ctx._copies |
4f876e6b30fa
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parents:
45637
diff
changeset
|
591 removed = ctx.filesremoved() |
4f876e6b30fa
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Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
45637
diff
changeset
|
592 return p1, p2, p1copies, p2copies, removed, get_ismerged(rev) |
4f876e6b30fa
copies: use dedicated `_revinfo_getter` function and call
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parents:
45637
diff
changeset
|
593 |
4f876e6b30fa
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Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
45637
diff
changeset
|
594 return revinfo |
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copies: use dedicated `_revinfo_getter` function and call
Pierre-Yves David <pierre-yves.david@octobus.net>
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diff
changeset
|
595 |
4f876e6b30fa
copies: use dedicated `_revinfo_getter` function and call
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
45637
diff
changeset
|
596 |
45637
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copies: make two version of the changeset centric algorithm
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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diff
changeset
|
597 def _combine_changeset_copies_extra( |
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copies: make two version of the changeset centric algorithm
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diff
changeset
|
598 revs, children, targetrev, revinfo, match, isancestor |
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copies: make two version of the changeset centric algorithm
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parents:
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diff
changeset
|
599 ): |
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Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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diff
changeset
|
600 """version of `_combine_changeset_copies` that works with the Google |
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copies: make two version of the changeset centric algorithm
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parents:
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diff
changeset
|
601 specific "extra" based storage for copy information""" |
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copies: make two version of the changeset centric algorithm
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parents:
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diff
changeset
|
602 all_copies = {} |
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parents:
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diff
changeset
|
603 alwaysmatch = match.always() |
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parents:
45624
diff
changeset
|
604 for r in revs: |
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parents:
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diff
changeset
|
605 copies = all_copies.pop(r, None) |
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diff
changeset
|
606 if copies is None: |
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copies: make two version of the changeset centric algorithm
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changeset
|
607 # this is a root |
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parents:
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changeset
|
608 copies = {} |
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changeset
|
609 for i, c in enumerate(children[r]): |
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diff
changeset
|
610 p1, p2, p1copies, p2copies, removed, ismerged = revinfo(c) |
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copies: make two version of the changeset centric algorithm
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changeset
|
611 if r == p1: |
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parents:
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diff
changeset
|
612 parent = 1 |
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copies: make two version of the changeset centric algorithm
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diff
changeset
|
613 childcopies = p1copies |
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copies: make two version of the changeset centric algorithm
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diff
changeset
|
614 else: |
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Pierre-Yves David <pierre-yves.david@octobus.net>
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diff
changeset
|
615 assert r == p2 |
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changeset
|
616 parent = 2 |
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diff
changeset
|
617 childcopies = p2copies |
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changeset
|
618 if not alwaysmatch: |
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copies: make two version of the changeset centric algorithm
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changeset
|
619 childcopies = { |
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parents:
45624
diff
changeset
|
620 dst: src for dst, src in childcopies.items() if match(dst) |
ad6ebb6f0dfe
copies: make two version of the changeset centric algorithm
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changeset
|
621 } |
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diff
changeset
|
622 newcopies = copies |
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diff
changeset
|
623 if childcopies: |
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copies: make two version of the changeset centric algorithm
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diff
changeset
|
624 newcopies = copies.copy() |
48913
f254fc73d956
global: bulk replace simple pycompat.iteritems(x) with x.items()
Gregory Szorc <gregory.szorc@gmail.com>
parents:
48875
diff
changeset
|
625 for dest, source in childcopies.items(): |
45637
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copies: make two version of the changeset centric algorithm
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parents:
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diff
changeset
|
626 prev = copies.get(source) |
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copies: make two version of the changeset centric algorithm
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parents:
45624
diff
changeset
|
627 if prev is not None and prev[1] is not None: |
ad6ebb6f0dfe
copies: make two version of the changeset centric algorithm
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
45624
diff
changeset
|
628 source = prev[1] |
ad6ebb6f0dfe
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629 newcopies[dest] = (c, source) |
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630 assert newcopies is not copies |
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|
631 for f in removed: |
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632 if f in newcopies: |
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633 if newcopies is copies: |
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634 # copy on write to avoid affecting potential other |
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635 # branches. when there are no other branches, this |
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|
636 # could be avoided. |
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|
637 newcopies = copies.copy() |
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638 newcopies[f] = (c, None) |
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|
639 othercopies = all_copies.get(c) |
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640 if othercopies is None: |
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641 all_copies[c] = newcopies |
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changeset
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642 else: |
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643 # we are the second parent to work on c, we need to merge our |
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|
644 # work with the other. |
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645 # |
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646 # In case of conflict, parent 1 take precedence over parent 2. |
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647 # This is an arbitrary choice made anew when implementing |
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648 # changeset based copies. It was made without regards with |
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649 # potential filelog related behavior. |
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650 if parent == 1: |
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651 _merge_copies_dict_extra( |
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652 othercopies, newcopies, isancestor, ismerged |
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653 ) |
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654 else: |
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655 _merge_copies_dict_extra( |
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656 newcopies, othercopies, isancestor, ismerged |
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657 ) |
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658 all_copies[c] = newcopies |
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659 |
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660 final_copies = {} |
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661 for dest, (tt, source) in all_copies[targetrev].items(): |
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662 if source is not None: |
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663 final_copies[dest] = source |
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664 return final_copies |
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665 |
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666 |
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667 def _merge_copies_dict_extra(minor, major, isancestor, ismerged): |
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668 """version of `_merge_copies_dict` that works with the Google |
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669 specific "extra" based storage for copy information""" |
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670 for dest, value in major.items(): |
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671 other = minor.get(dest) |
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672 if other is None: |
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673 minor[dest] = value |
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674 else: |
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|
675 new_tt = value[0] |
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676 other_tt = other[0] |
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677 if value[1] == other[1]: |
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678 continue |
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679 # content from "major" wins, unless it is older |
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680 # than the branch point or there is a merge |
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681 if ( |
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682 new_tt == other_tt |
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683 or not isancestor(new_tt, other_tt) |
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684 or ismerged(dest) |
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685 ): |
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686 minor[dest] = value |
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687 |
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|
688 |
42595
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|
689 def _forwardcopies(a, b, base=None, match=None): |
35422
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|
690 """find {dst@b: src@a} copy mapping where a is an ancestor of b""" |
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|
691 |
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|
692 if base is None: |
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|
693 base = a |
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|
694 match = a.repo().narrowmatch(match) |
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|
695 # check for working copy |
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|
696 if b.rev() is None: |
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|
697 cm = _committedforwardcopies(a, b.p1(), base, match) |
35423
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|
698 # combine copies from dirstate if necessary |
42593
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copies: inline _chainandfilter() to prepare for next patch
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|
699 copies = _chain(cm, _dirstatecopies(b._repo, match)) |
42592
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|
700 else: |
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701 copies = _committedforwardcopies(a, b, base, match) |
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702 return copies |
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|
703 |
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|
704 |
41753
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diff
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|
705 def _backwardrenames(a, b, match): |
46648
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diff
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|
706 """find renames from a to b""" |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
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diff
changeset
|
707 if a._repo.ui.config(b'experimental', b'copytrace') == b'off': |
26013
38f92d12357c
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|
708 return {} |
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|
709 |
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|
710 # We don't want to pass in "match" here, since that would filter |
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|
711 # the destination by it. Since we're reversing the copies, we want |
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|
712 # to filter the source instead. |
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|
713 copies = _forwardcopies(b, a) |
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|
714 return _reverse_renames(copies, a, match) |
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|
715 |
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|
716 |
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|
717 def _reverse_renames(copies, dst, match): |
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|
718 """given copies to context 'dst', finds renames from that context""" |
18136
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copies: do not track backward copies, only renames (issue3739)
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diff
changeset
|
719 # Even though we're not taking copies into account, 1:n rename situations |
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diff
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|
720 # can still exist (e.g. hg cp a b; hg mv a c). In those cases we |
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diff
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|
721 # arbitrarily pick one of the renames. |
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|
722 r = {} |
48913
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Gregory Szorc <gregory.szorc@gmail.com>
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diff
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|
723 for k, v in sorted(copies.items()): |
41753
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changeset
|
724 if match and not match(v): |
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|
725 continue |
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|
726 # remove copies |
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|
727 if v in dst: |
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|
728 continue |
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|
729 r[v] = k |
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diff
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|
730 return r |
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|
731 |
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diff
changeset
|
732 |
24782
4906dc0e038c
copies: add matcher parameter to copy logic
Durham Goode <durham@fb.com>
parents:
24625
diff
changeset
|
733 def pathcopies(x, y, match=None): |
35421
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734 """find {dst@y: src@x} copy mapping for directed compare""" |
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735 repo = x._repo |
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736 debug = repo.ui.debugflag and repo.ui.configbool(b'devel', b'debug.copies') |
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737 if debug: |
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738 repo.ui.debug( |
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739 b'debug.copies: searching copies from %s to %s\n' % (x, y) |
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740 ) |
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741 if x == y or not x or not y: |
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742 return {} |
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parents:
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743 if y.rev() is None and x == y.p1(): |
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744 if debug: |
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745 repo.ui.debug(b'debug.copies: search mode: dirstate\n') |
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|
746 # short-circuit to avoid issues with merge states |
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747 return _dirstatecopies(repo, match) |
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748 a = y.ancestor(x) |
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|
749 if a == x: |
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750 if debug: |
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751 repo.ui.debug(b'debug.copies: search mode: forward\n') |
42592
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|
752 copies = _forwardcopies(x, y, match=match) |
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753 elif a == y: |
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754 if debug: |
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755 repo.ui.debug(b'debug.copies: search mode: backward\n') |
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756 copies = _backwardrenames(x, y, match=match) |
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|
757 else: |
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758 if debug: |
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759 repo.ui.debug(b'debug.copies: search mode: combined\n') |
42595
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parents:
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|
760 base = None |
46113
59fa3890d40a
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Joerg Sonnenberger <joerg@bec.de>
parents:
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diff
changeset
|
761 if a.rev() != nullrev: |
42595
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762 base = x |
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763 x_copies = _forwardcopies(a, x) |
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|
764 y_copies = _forwardcopies(a, y, base, match=match) |
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765 same_keys = set(x_copies) & set(y_copies) |
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766 for k in same_keys: |
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767 if x_copies.get(k) == y_copies.get(k): |
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768 del x_copies[k] |
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769 del y_copies[k] |
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770 x_backward_renames = _reverse_renames(x_copies, x, match) |
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771 copies = _chain( |
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772 x_backward_renames, |
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773 y_copies, |
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774 ) |
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parents:
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775 _filter(x, y, copies) |
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776 return copies |
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777 |
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778 |
30186
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779 def mergecopies(repo, c1, c2, base): |
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780 """ |
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781 Finds moves and copies between context c1 and c2 that are relevant for |
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782 merging. 'base' will be used as the merge base. |
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783 |
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784 Copytracing is used in commands like rebase, merge, unshelve, etc to merge |
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changeset
|
785 files that were moved/ copied in one merge parent and modified in another. |
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786 For example: |
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787 |
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|
788 o ---> 4 another commit |
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789 | |
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790 | o ---> 3 commit that modifies a.txt |
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791 | / |
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792 o / ---> 2 commit that moves a.txt to b.txt |
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|
793 |/ |
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794 o ---> 1 merge base |
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795 |
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796 If we try to rebase revision 3 on revision 4, since there is no a.txt in |
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797 revision 4, and if user have copytrace disabled, we prints the following |
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|
798 message: |
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799 |
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800 ```other changed <file> which local deleted``` |
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801 |
44199
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802 Returns a tuple where: |
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|
803 |
44199
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|
804 "branch_copies" an instance of branch_copies. |
18134
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|
805 |
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806 "diverge" is a mapping of source name -> list of destination names |
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|
807 for divergent renames. |
16794
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merge: warn about file deleted in one branch and renamed in other (issue3074)
Thomas Arendsen Hein <thomas@intevation.de>
parents:
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diff
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|
808 |
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809 This function calls different copytracing algorithms based on config. |
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810 """ |
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811 # avoid silly behavior for update from empty dir |
6430
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|
812 if not c1 or not c2 or c1 == c2: |
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813 return branch_copies(), branch_copies(), {} |
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814 |
41752
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|
815 narrowmatch = c1.repo().narrowmatch() |
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816 |
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diff
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|
817 # avoid silly behavior for parent -> working dir |
13878
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|
818 if c2.node() is None and c1.node() == repo.dirstate.p1(): |
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|
819 return ( |
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|
820 branch_copies(_dirstatecopies(repo, narrowmatch)), |
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821 branch_copies(), |
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|
822 {}, |
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|
823 ) |
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824 |
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825 copytracing = repo.ui.config(b'experimental', b'copytrace') |
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826 if stringutil.parsebool(copytracing) is False: |
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827 # stringutil.parsebool() returns None when it is unable to parse the |
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828 # value, so we should rely on making sure copytracing is on such cases |
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829 return branch_copies(), branch_copies(), {} |
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|
830 |
42226
a6be3af3a397
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|
831 if usechangesetcentricalgo(repo): |
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832 # The heuristics don't make sense when we need changeset-centric algos |
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|
833 return _fullcopytracing(repo, c1, c2, base) |
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|
834 |
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Durham Goode <durham@fb.com>
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|
835 # Copy trace disabling is explicitly below the node == p1 logic above |
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836 # because the logic above is required for a simple copy to be kept across a |
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837 # rebase. |
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838 if copytracing == b'heuristics': |
34366
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839 # Do full copytracing if only non-public revisions are involved as |
d00910b286cd
copytrace: use ctx.mutable() instead of adhoc constant of non-public phases
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|
840 # that will be fast enough and will also cover the copies which could |
d00910b286cd
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|
841 # be missed by heuristics |
34311
1826d695ad58
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842 if _isfullcopytraceable(repo, c1, base): |
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843 return _fullcopytracing(repo, c1, c2, base) |
34179
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Pulkit Goyal <7895pulkit@gmail.com>
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844 return _heuristicscopytracing(repo, c1, c2, base) |
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845 else: |
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|
846 return _fullcopytracing(repo, c1, c2, base) |
26013
38f92d12357c
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Durham Goode <durham@fb.com>
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diff
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|
847 |
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|
848 |
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849 def _isfullcopytraceable(repo, c1, base): |
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89a2afe31e82
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Augie Fackler <raf@durin42.com>
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|
850 """Checks that if base, source and destination are all no-public branches, |
34366
d00910b286cd
copytrace: use ctx.mutable() instead of adhoc constant of non-public phases
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|
851 if yes let's use the full copytrace algorithm for increased capabilities |
d00910b286cd
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|
852 since it will be fast enough. |
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|
853 |
e79b3611223b
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|
854 `experimental.copytrace.sourcecommitlimit` can be used to set a limit for |
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diff
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|
855 number of changesets from c1 to base such that if number of changesets are |
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|
856 more than the limit, full copytracing algorithm won't be used. |
34288
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diff
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|
857 """ |
34311
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858 if c1.rev() is None: |
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859 c1 = c1.p1() |
34366
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860 if c1.mutable() and base.mutable(): |
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|
861 sourcecommitlimit = repo.ui.configint( |
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862 b'experimental', b'copytrace.sourcecommitlimit' |
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|
863 ) |
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|
864 commits = len(repo.revs(b'%d::%d', base.rev(), c1.rev())) |
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|
865 return commits < sourcecommitlimit |
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Pulkit Goyal <7895pulkit@gmail.com>
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866 return False |
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|
867 |
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|
868 |
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|
869 def _checksinglesidecopies( |
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|
870 src, dsts1, m1, m2, mb, c2, base, copy, renamedelete |
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|
871 ): |
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|
872 if src not in m2: |
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|
873 # deleted on side 2 |
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874 if src not in m1: |
57203e0210f8
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Martin von Zweigbergk <martinvonz@google.com>
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|
875 # renamed on side 1, deleted on side 2 |
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copies: calculate mergecopies() based on pathcopies()
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diff
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|
876 renamedelete[src] = dsts1 |
44210
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Martin von Zweigbergk <martinvonz@google.com>
parents:
44200
diff
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|
877 elif src not in mb: |
d0c3eead515a
copies: fix crash when copy source is not in graft base
Martin von Zweigbergk <martinvonz@google.com>
parents:
44200
diff
changeset
|
878 # Work around the "short-circuit to avoid issues with merge states" |
d0c3eead515a
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Martin von Zweigbergk <martinvonz@google.com>
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44200
diff
changeset
|
879 # thing in pathcopies(): pathcopies(x, y) can return a copy where the |
d0c3eead515a
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parents:
44200
diff
changeset
|
880 # 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
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|
881 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
|
882 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:
44276
diff
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|
883 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
|
884 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>
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diff
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|
885 # modified on side 2 |
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
42210
diff
changeset
|
886 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
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|
887 copy[dst] = src |
42222
57203e0210f8
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Martin von Zweigbergk <martinvonz@google.com>
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diff
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|
888 |
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43020
diff
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|
889 |
48946
642e31cb55f0
py3: use class X: instead of class X(object):
Gregory Szorc <gregory.szorc@gmail.com>
parents:
48913
diff
changeset
|
890 class branch_copies: |
44199
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
891 """Information about copies made on one side of a merge/graft. |
7f8bdee0034e
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Martin von Zweigbergk <martinvonz@google.com>
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44197
diff
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|
892 |
7f8bdee0034e
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Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
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|
893 "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
|
894 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>
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44197
diff
changeset
|
895 |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
896 "movewithdir" is a mapping from source name -> destination name, |
7f8bdee0034e
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Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
897 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
|
898 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
|
899 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
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|
900 |
7f8bdee0034e
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Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
901 "renamedelete" is a mapping of source name -> list of destination |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
902 names for files deleted in c1 that were renamed in c2 or vice-versa. |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
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|
903 |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
904 "dirmove" is a mapping of detected source dir -> destination dir renames. |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
905 This is needed for handling changes to new files previously grafted into |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
906 renamed directories. |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
907 """ |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
908 |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
909 def __init__( |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
910 self, copy=None, renamedelete=None, dirmove=None, movewithdir=None |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
911 ): |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
912 self.copy = {} if copy is None else copy |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
913 self.renamedelete = {} if renamedelete is None else renamedelete |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
914 self.dirmove = {} if dirmove is None else dirmove |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
915 self.movewithdir = {} if movewithdir is None else movewithdir |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
916 |
44994
cfd06649a1b8
copies: implement __repr__ on branch_copies for debugging
Martin von Zweigbergk <martinvonz@google.com>
parents:
44940
diff
changeset
|
917 def __repr__(self): |
45942
89a2afe31e82
formating: upgrade to black 20.8b1
Augie Fackler <raf@durin42.com>
parents:
45892
diff
changeset
|
918 return '<branch_copies\n copy=%r\n renamedelete=%r\n dirmove=%r\n movewithdir=%r\n>' % ( |
89a2afe31e82
formating: upgrade to black 20.8b1
Augie Fackler <raf@durin42.com>
parents:
45892
diff
changeset
|
919 self.copy, |
89a2afe31e82
formating: upgrade to black 20.8b1
Augie Fackler <raf@durin42.com>
parents:
45892
diff
changeset
|
920 self.renamedelete, |
89a2afe31e82
formating: upgrade to black 20.8b1
Augie Fackler <raf@durin42.com>
parents:
45892
diff
changeset
|
921 self.dirmove, |
89a2afe31e82
formating: upgrade to black 20.8b1
Augie Fackler <raf@durin42.com>
parents:
45892
diff
changeset
|
922 self.movewithdir, |
44994
cfd06649a1b8
copies: implement __repr__ on branch_copies for debugging
Martin von Zweigbergk <martinvonz@google.com>
parents:
44940
diff
changeset
|
923 ) |
cfd06649a1b8
copies: implement __repr__ on branch_copies for debugging
Martin von Zweigbergk <martinvonz@google.com>
parents:
44940
diff
changeset
|
924 |
44199
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
925 |
34078
b4b196092cc3
copytrace: move the default copytracing algorithm in a new function
Pulkit Goyal <7895pulkit@gmail.com>
parents:
34077
diff
changeset
|
926 def _fullcopytracing(repo, c1, c2, base): |
45942
89a2afe31e82
formating: upgrade to black 20.8b1
Augie Fackler <raf@durin42.com>
parents:
45892
diff
changeset
|
927 """The full copytracing algorithm which finds all the new files that were |
34078
b4b196092cc3
copytrace: move the default copytracing algorithm in a new function
Pulkit Goyal <7895pulkit@gmail.com>
parents:
34077
diff
changeset
|
928 added from merge base up to the top commit and for each file it checks if |
b4b196092cc3
copytrace: move the default copytracing algorithm in a new function
Pulkit Goyal <7895pulkit@gmail.com>
parents:
34077
diff
changeset
|
929 this file was copied from another file. |
b4b196092cc3
copytrace: move the default copytracing algorithm in a new function
Pulkit Goyal <7895pulkit@gmail.com>
parents:
34077
diff
changeset
|
930 |
b4b196092cc3
copytrace: move the default copytracing algorithm in a new function
Pulkit Goyal <7895pulkit@gmail.com>
parents:
34077
diff
changeset
|
931 This is pretty slow when a lot of changesets are involved but will track all |
b4b196092cc3
copytrace: move the default copytracing algorithm in a new function
Pulkit Goyal <7895pulkit@gmail.com>
parents:
34077
diff
changeset
|
932 the copies. |
b4b196092cc3
copytrace: move the default copytracing algorithm in a new function
Pulkit Goyal <7895pulkit@gmail.com>
parents:
34077
diff
changeset
|
933 """ |
6274
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
934 m1 = c1.manifest() |
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
935 m2 = c2.manifest() |
30186
f7ed5af31242
mergecopies: rename 'ca' to 'base'
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents:
30185
diff
changeset
|
936 mb = base.manifest() |
6274
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
937 |
42222
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
42210
diff
changeset
|
938 copies1 = pathcopies(base, c1) |
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
42210
diff
changeset
|
939 copies2 = pathcopies(base, c2) |
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
42210
diff
changeset
|
940 |
44162
baf3fe2977cc
copies: move early return in mergecopies() earlier
Martin von Zweigbergk <martinvonz@google.com>
parents:
44093
diff
changeset
|
941 if not (copies1 or copies2): |
44200
fa9ad1da2e77
merge: start using the per-side copy dicts
Martin von Zweigbergk <martinvonz@google.com>
parents:
44199
diff
changeset
|
942 return branch_copies(), branch_copies(), {} |
44162
baf3fe2977cc
copies: move early return in mergecopies() earlier
Martin von Zweigbergk <martinvonz@google.com>
parents:
44093
diff
changeset
|
943 |
42222
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
42210
diff
changeset
|
944 inversecopies1 = {} |
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
42210
diff
changeset
|
945 inversecopies2 = {} |
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
42210
diff
changeset
|
946 for dst, src in copies1.items(): |
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
42210
diff
changeset
|
947 inversecopies1.setdefault(src, []).append(dst) |
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
42210
diff
changeset
|
948 for dst, src in copies2.items(): |
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
42210
diff
changeset
|
949 inversecopies2.setdefault(src, []).append(dst) |
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
42210
diff
changeset
|
950 |
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951 copy1 = {} |
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952 copy2 = {} |
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953 diverge = {} |
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954 renamedelete1 = {} |
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955 renamedelete2 = {} |
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956 allsources = set(inversecopies1) | set(inversecopies2) |
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957 for src in allsources: |
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958 dsts1 = inversecopies1.get(src) |
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959 dsts2 = inversecopies2.get(src) |
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960 if dsts1 and dsts2: |
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961 # copied/renamed on both sides |
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962 if src not in m1 and src not in m2: |
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963 # renamed on both sides |
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964 dsts1 = set(dsts1) |
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965 dsts2 = set(dsts2) |
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966 # If there's some overlap in the rename destinations, we |
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967 # consider it not divergent. For example, if side 1 copies 'a' |
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968 # to 'b' and 'c' and deletes 'a', and side 2 copies 'a' to 'c' |
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969 # and 'd' and deletes 'a'. |
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970 if dsts1 & dsts2: |
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971 for dst in dsts1 & dsts2: |
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972 copy1[dst] = src |
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973 copy2[dst] = src |
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974 else: |
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975 diverge[src] = sorted(dsts1 | dsts2) |
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976 elif src in m1 and src in m2: |
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977 # copied on both sides |
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978 dsts1 = set(dsts1) |
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979 dsts2 = set(dsts2) |
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980 for dst in dsts1 & dsts2: |
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981 copy1[dst] = src |
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982 copy2[dst] = src |
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983 # TODO: Handle cases where it was renamed on one side and copied |
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984 # on the other side |
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985 elif dsts1: |
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986 # copied/renamed only on side 1 |
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987 _checksinglesidecopies( |
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988 src, dsts1, m1, m2, mb, c2, base, copy1, renamedelete1 |
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989 ) |
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990 elif dsts2: |
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991 # copied/renamed only on side 2 |
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992 _checksinglesidecopies( |
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993 src, dsts2, m2, m1, mb, c1, base, copy2, renamedelete2 |
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|
994 ) |
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995 |
26659
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|
996 # find interesting file sets from manifests |
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997 cache = [] |
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998 |
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999 def _get_addedfiles(idx): |
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1000 if not cache: |
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1001 addedinm1 = m1.filesnotin(mb, repo.narrowmatch()) |
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1002 addedinm2 = m2.filesnotin(mb, repo.narrowmatch()) |
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1003 u1 = sorted(addedinm1 - addedinm2) |
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1004 u2 = sorted(addedinm2 - addedinm1) |
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1005 cache.extend((u1, u2)) |
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1006 return cache[idx] |
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1007 |
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1008 u1fn = lambda: _get_addedfiles(0) |
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1009 u2fn = lambda: _get_addedfiles(1) |
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1010 if repo.ui.debugflag: |
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1011 u1 = u1fn() |
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1012 u2 = u2fn() |
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1013 |
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1014 header = b" unmatched files in %s" |
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1015 if u1: |
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1016 repo.ui.debug( |
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1017 b"%s:\n %s\n" % (header % b'local', b"\n ".join(u1)) |
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1018 ) |
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1019 if u2: |
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|
1020 repo.ui.debug( |
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1021 b"%s:\n %s\n" % (header % b'other', b"\n ".join(u2)) |
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1022 ) |
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1023 |
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1024 renamedeleteset = set() |
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1025 divergeset = set() |
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1026 for dsts in diverge.values(): |
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1027 divergeset.update(dsts) |
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1028 for dsts in renamedelete1.values(): |
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1029 renamedeleteset.update(dsts) |
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1030 for dsts in renamedelete2.values(): |
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|
1031 renamedeleteset.update(dsts) |
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1032 |
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1033 repo.ui.debug( |
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|
1034 b" all copies found (* = to merge, ! = divergent, " |
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|
1035 b"% = renamed and deleted):\n" |
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1036 ) |
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1037 for side, copies in ((b"local", copies1), (b"remote", copies2)): |
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1038 if not copies: |
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|
1039 continue |
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|
1040 repo.ui.debug(b" on %s side:\n" % side) |
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1041 for f in sorted(copies): |
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1042 note = b"" |
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|
1043 if f in copy1 or f in copy2: |
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|
1044 note += b"*" |
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|
1045 if f in divergeset: |
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|
1046 note += b"!" |
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|
1047 if f in renamedeleteset: |
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|
1048 note += b"%" |
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|
1049 repo.ui.debug( |
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|
1050 b" src: '%s' -> dst: '%s' %s\n" % (copies[f], f, note) |
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|
1051 ) |
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1052 del renamedeleteset |
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|
1053 del divergeset |
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1054 |
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|
1055 repo.ui.debug(b" checking for directory renames\n") |
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|
1056 |
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|
1057 dirmove1, movewithdir2 = _dir_renames(repo, c1, copy1, copies1, u2fn) |
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|
1058 dirmove2, movewithdir1 = _dir_renames(repo, c2, copy2, copies2, u1fn) |
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|
1059 |
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1060 branch_copies1 = branch_copies(copy1, renamedelete1, dirmove1, movewithdir1) |
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1061 branch_copies2 = branch_copies(copy2, renamedelete2, dirmove2, movewithdir2) |
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1062 |
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1063 return branch_copies1, branch_copies2, diverge |
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1064 |
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1065 |
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1066 def _dir_renames(repo, ctx, copy, fullcopy, addedfilesfn): |
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1067 """Finds moved directories and files that should move with them. |
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1068 |
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1069 ctx: the context for one of the sides |
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1070 copy: files copied on the same side (as ctx) |
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1071 fullcopy: files copied on the same side (as ctx), including those that |
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1072 merge.manifestmerge() won't care about |
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1073 addedfilesfn: function returning added files on the other side (compared to |
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1074 ctx) |
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1075 """ |
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1076 # generate a directory move map |
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1077 invalid = set() |
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1078 dirmove = {} |
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1079 |
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1080 # examine each file copy for a potential directory move, which is |
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1081 # when all the files in a directory are moved to a new directory |
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1082 for dst, src in fullcopy.items(): |
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1083 dsrc, ddst = pathutil.dirname(src), pathutil.dirname(dst) |
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1084 if dsrc in invalid: |
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1085 # already seen to be uninteresting |
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1086 continue |
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1087 elif ctx.hasdir(dsrc) and ctx.hasdir(ddst): |
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1088 # directory wasn't entirely moved locally |
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1089 invalid.add(dsrc) |
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1090 elif dsrc in dirmove and dirmove[dsrc] != ddst: |
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1091 # files from the same directory moved to two different places |
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1092 invalid.add(dsrc) |
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1093 else: |
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1094 # looks good so far |
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1095 dirmove[dsrc] = ddst |
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1096 |
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1097 for i in invalid: |
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1098 if i in dirmove: |
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1099 del dirmove[i] |
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1100 del invalid |
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1101 |
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1102 if not dirmove: |
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1103 return {}, {} |
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1104 |
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1105 dirmove = {k + b"/": v + b"/" for k, v in dirmove.items()} |
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1106 |
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1107 for d in dirmove: |
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1108 repo.ui.debug( |
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1109 b" discovered dir src: '%s' -> dst: '%s'\n" % (d, dirmove[d]) |
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1110 ) |
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1111 |
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1112 # Sort the directories in reverse order, so we find children first |
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1113 # For example, if dir1/ was renamed to dir2/, and dir1/subdir1/ |
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1114 # was renamed to dir2/subdir2/, we want to move dir1/subdir1/file |
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1115 # to dir2/subdir2/file (not dir2/subdir1/file) |
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1116 dirmove_children_first = sorted(dirmove, reverse=True) |
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1117 |
30183
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|
1118 movewithdir = {} |
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1119 # check unaccounted nonoverlapping files against directory moves |
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1120 for f in addedfilesfn(): |
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1121 if f not in fullcopy: |
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1122 for d in dirmove_children_first: |
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1123 if f.startswith(d): |
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1124 # new file added in a directory that was moved, move it |
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1125 df = dirmove[d] + f[len(d) :] |
6426
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1126 if df not in copy: |
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1127 movewithdir[f] = df |
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1128 repo.ui.debug( |
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1129 b" pending file src: '%s' -> dst: '%s'\n" |
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1130 % (f, df) |
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1131 ) |
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1132 break |
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1133 |
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1134 return dirmove, movewithdir |
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|
1135 |
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1136 |
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1137 def _heuristicscopytracing(repo, c1, c2, base): |
45942
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1138 """Fast copytracing using filename heuristics |
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1139 |
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1140 Assumes that moves or renames are of following two types: |
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1141 |
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1142 1) Inside a directory only (same directory name but different filenames) |
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1143 2) Move from one directory to another |
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1144 (same filenames but different directory names) |
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1145 |
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1146 Works only when there are no merge commits in the "source branch". |
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1147 Source branch is commits from base up to c2 not including base. |
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1148 |
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1149 If merge is involved it fallbacks to _fullcopytracing(). |
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1150 |
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1151 Can be used by setting the following config: |
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1152 |
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1153 [experimental] |
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1154 copytrace = heuristics |
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1155 |
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1156 In some cases the copy/move candidates found by heuristics can be very large |
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1157 in number and that will make the algorithm slow. The number of possible |
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1158 candidates to check can be limited by using the config |
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1159 `experimental.copytrace.movecandidateslimit` which defaults to 100. |
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1160 """ |
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1161 |
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1162 if c1.rev() is None: |
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1163 c1 = c1.p1() |
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1164 if c2.rev() is None: |
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1165 c2 = c2.p1() |
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1166 |
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1167 changedfiles = set() |
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1168 m1 = c1.manifest() |
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1169 if not repo.revs(b'%d::%d', base.rev(), c2.rev()): |
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1170 # If base is not in c2 branch, we switch to fullcopytracing |
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1171 repo.ui.debug( |
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1172 b"switching to full copytracing as base is not " |
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1173 b"an ancestor of c2\n" |
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1174 ) |
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1175 return _fullcopytracing(repo, c1, c2, base) |
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1176 |
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1177 ctx = c2 |
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1178 while ctx != base: |
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1179 if len(ctx.parents()) == 2: |
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1180 # To keep things simple let's not handle merges |
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1181 repo.ui.debug(b"switching to full copytracing because of merges\n") |
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1182 return _fullcopytracing(repo, c1, c2, base) |
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1183 changedfiles.update(ctx.files()) |
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1184 ctx = ctx.p1() |
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1185 |
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1186 copies2 = {} |
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1187 cp = _forwardcopies(base, c2) |
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1188 for dst, src in cp.items(): |
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1189 if src in m1: |
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1190 copies2[dst] = src |
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1191 |
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1192 # file is missing if it isn't present in the destination, but is present in |
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1193 # the base and present in the source. |
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1194 # Presence in the base is important to exclude added files, presence in the |
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1195 # source is important to exclude removed files. |
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1196 filt = lambda f: f not in m1 and f in base and f in c2 |
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1197 missingfiles = [f for f in changedfiles if filt(f)] |
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1198 |
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1199 copies1 = {} |
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1200 if missingfiles: |
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1201 basenametofilename = collections.defaultdict(list) |
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1202 dirnametofilename = collections.defaultdict(list) |
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1203 |
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1204 for f in m1.filesnotin(base.manifest()): |
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1205 basename = os.path.basename(f) |
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1206 dirname = os.path.dirname(f) |
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1207 basenametofilename[basename].append(f) |
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1208 dirnametofilename[dirname].append(f) |
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1209 |
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1210 for f in missingfiles: |
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1211 basename = os.path.basename(f) |
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1212 dirname = os.path.dirname(f) |
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1213 samebasename = basenametofilename[basename] |
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1214 samedirname = dirnametofilename[dirname] |
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1215 movecandidates = samebasename + samedirname |
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1216 # f is guaranteed to be present in c2, that's why |
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1217 # c2.filectx(f) won't fail |
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1218 f2 = c2.filectx(f) |
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1219 # we can have a lot of candidates which can slow down the heuristics |
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1220 # config value to limit the number of candidates moves to check |
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1221 maxcandidates = repo.ui.configint( |
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1222 b'experimental', b'copytrace.movecandidateslimit' |
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1223 ) |
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1224 |
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1225 if len(movecandidates) > maxcandidates: |
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1226 repo.ui.status( |
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1227 _( |
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1228 b"skipping copytracing for '%s', more " |
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1229 b"candidates than the limit: %d\n" |
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1230 ) |
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1231 % (f, len(movecandidates)) |
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1232 ) |
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1233 continue |
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1234 |
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1235 for candidate in movecandidates: |
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1236 f1 = c1.filectx(candidate) |
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|
1237 if _related(f1, f2): |
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1238 # if there are a few related copies then we'll merge |
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1239 # changes into all of them. This matches the behaviour |
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1240 # of upstream copytracing |
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1241 copies1[candidate] = f |
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1242 |
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1243 return branch_copies(copies1), branch_copies(copies2), {} |
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1244 |
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1245 |
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1246 def _related(f1, f2): |
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1247 """return True if f1 and f2 filectx have a common ancestor |
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1248 |
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1249 Walk back to common ancestor to see if the two files originate |
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1250 from the same file. Since workingfilectx's rev() is None it messes |
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1251 up the integer comparison logic, hence the pre-step check for |
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1252 None (f1 and f2 can only be workingfilectx's initially). |
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1253 """ |
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1254 |
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1255 if f1 == f2: |
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1256 return True # a match |
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1257 |
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1258 g1, g2 = f1.ancestors(), f2.ancestors() |
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1259 try: |
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1260 f1r, f2r = f1.linkrev(), f2.linkrev() |
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1261 |
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1262 if f1r is None: |
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1263 f1 = next(g1) |
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1264 if f2r is None: |
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1265 f2 = next(g2) |
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1266 |
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1267 while True: |
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1268 f1r, f2r = f1.linkrev(), f2.linkrev() |
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1269 if f1r > f2r: |
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1270 f1 = next(g1) |
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1271 elif f2r > f1r: |
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1272 f2 = next(g2) |
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1273 else: # f1 and f2 point to files in the same linkrev |
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1274 return f1 == f2 # true if they point to the same file |
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1275 except StopIteration: |
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1276 return False |
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1277 |
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1278 |
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|
1279 def graftcopies(wctx, ctx, base): |
44093
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1280 """reproduce copies between base and ctx in the wctx |
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1281 |
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1282 Unlike mergecopies(), this function will only consider copies between base |
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1283 and ctx; it will ignore copies between base and wctx. Also unlike |
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1284 mergecopies(), this function will apply copies to the working copy (instead |
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1285 of just returning information about the copies). That makes it cheaper |
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1286 (especially in the common case of base==ctx.p1()) and useful also when |
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1287 experimental.copytrace=off. |
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1288 |
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1289 merge.update() will have already marked most copies, but it will only |
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1290 mark copies if it thinks the source files are related (see |
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1291 merge._related()). It will also not mark copies if the file wasn't modified |
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1292 on the local side. This function adds the copies that were "missed" |
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1293 by merge.update(). |
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1294 """ |
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1295 new_copies = pathcopies(base, ctx) |
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1296 parent = wctx.p1() |
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1297 _filter(parent, wctx, new_copies) |
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1298 # Extra filtering to drop copy information for files that existed before |
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1299 # the graft. This is to handle the case of grafting a rename onto a commit |
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1300 # that already has the rename. Otherwise the presence of copy information |
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1301 # would result in the creation of an empty commit where we would prefer to |
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1302 # not create one. |
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1303 for dest, __ in list(new_copies.items()): |
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1304 if dest in parent: |
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1305 del new_copies[dest] |
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1306 for dst, src in new_copies.items(): |
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1307 wctx[dst].markcopied(src) |