Mercurial > public > mercurial-scm > hg-stable

annotate mercurial/rewriteutil.py @ 48813:2bb75c65fa6c stable

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ci: use the `v1.0` flavor of the docker images in the CI This new versioning will help us to maintain backward compatibility in the docker image. This will be useful to deal with mismatch between default/stable in version and the re-run CI on older changesets in the future. Once this changeset land on stable, we will have to merge it in default. Then we can start make backward incompatible changes in a new image version. Differential Revision: https://phab.mercurial-scm.org/D12388
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Fri, 18 Mar 2022 18:09:46 +0100
parents 48da5c325750
children d4752aeb20f1 6000f5b25c9b
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1 # rewriteutil.py - utility functions for rewriting changesets
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2 #
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3 # Copyright 2017 Octobus <contact@octobus.net>
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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7
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8 from __future__ import absolute_import
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9
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10 import re
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11
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12 from .i18n import _
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13 from .node import (
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14 hex,
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15 nullrev,
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16 )
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17
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18 from . import (
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19 error,
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20 node,
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21 obsolete,
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22 obsutil,
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23 revset,
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24 scmutil,
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25 util,
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26 )
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27
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28
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29 NODE_RE = re.compile(br'\b[0-9a-f]{6,64}\b')
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31
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32 def _formatrevs(repo, revs, maxrevs=4):
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33 """returns a string summarizing revisions in a decent size
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34
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35 If there are few enough revisions, we list them all. Otherwise we display a
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36 summary of the form:
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37
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38 1ea73414a91b and 5 others
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39 """
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40 tonode = repo.changelog.node
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41 numrevs = len(revs)
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42 if numrevs < maxrevs:
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43 shorts = [node.short(tonode(r)) for r in revs]
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44 summary = b', '.join(shorts)
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45 else:
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46 first = revs.first()
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47 summary = _(b'%s and %d others')
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48 summary %= (node.short(tonode(first)), numrevs - 1)
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49 return summary
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50
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51
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52 def precheck(repo, revs, action=b'rewrite'):
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53 """check if revs can be rewritten
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54 action is used to control the error message.
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55
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56 Make sure this function is called after taking the lock.
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57 """
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58 if nullrev in revs:
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59 msg = _(b"cannot %s the null revision") % action
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60 hint = _(b"no changeset checked out")
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61 raise error.InputError(msg, hint=hint)
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62
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63 if any(util.safehasattr(r, 'rev') for r in revs):
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64 repo.ui.develwarn(b"rewriteutil.precheck called with ctx not revs")
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65 revs = (r.rev() for r in revs)
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66
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67 if len(repo[None].parents()) > 1:
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68 raise error.StateError(
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69 _(b"cannot %s changesets while merging") % action
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70 )
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71
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72 publicrevs = repo.revs(b'%ld and public()', revs)
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73 if publicrevs:
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74 summary = _formatrevs(repo, publicrevs)
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75 msg = _(b"cannot %s public changesets: %s") % (action, summary)
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76 hint = _(b"see 'hg help phases' for details")
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77 raise error.InputError(msg, hint=hint)
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78
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79 newunstable = disallowednewunstable(repo, revs)
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80 if newunstable:
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81 hint = _(b"see 'hg help evolution.instability'")
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82 raise error.InputError(
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83 _(b"cannot %s changeset, as that will orphan %d descendants")
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84 % (action, len(newunstable)),
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85 hint=hint,
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86 )
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87
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88 if not obsolete.isenabled(repo, obsolete.allowdivergenceopt):
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89 new_divergence = _find_new_divergence(repo, revs)
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90 if new_divergence:
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91 local_ctx, other_ctx, base_ctx = new_divergence
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92 msg = _(
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93 b'cannot %s %s, as that creates content-divergence with %s'
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94 ) % (
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95 action,
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96 local_ctx,
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97 other_ctx,
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98 )
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99 if local_ctx.rev() != base_ctx.rev():
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100 msg += _(b', from %s') % base_ctx
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101 if repo.ui.verbose:
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102 if local_ctx.rev() != base_ctx.rev():
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103 msg += _(
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104 b'\n changeset %s is a successor of ' b'changeset %s'
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105 ) % (local_ctx, base_ctx)
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106 msg += _(
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107 b'\n changeset %s already has a successor in '
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108 b'changeset %s\n'
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109 b' rewriting changeset %s would create '
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110 b'"content-divergence"\n'
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111 b' set experimental.evolution.allowdivergence=True to '
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112 b'skip this check'
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113 ) % (base_ctx, other_ctx, local_ctx)
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114 raise error.InputError(
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115 msg,
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116 hint=_(
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117 b"see 'hg help evolution.instability' for details on content-divergence"
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118 ),
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119 )
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120 else:
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121 raise error.InputError(
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122 msg,
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123 hint=_(
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124 b"add --verbose for details or see "
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125 b"'hg help evolution.instability'"
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126 ),
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127 )
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128
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129
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130 def disallowednewunstable(repo, revs):
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131 """Checks whether editing the revs will create new unstable changesets and
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132 are we allowed to create them.
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133
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134 To allow new unstable changesets, set the config:
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135 `experimental.evolution.allowunstable=True`
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136 """
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137 allowunstable = obsolete.isenabled(repo, obsolete.allowunstableopt)
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138 if allowunstable:
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139 return revset.baseset()
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140 return repo.revs(b"(%ld::) - %ld", revs, revs)
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141
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142
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143 def _find_new_divergence(repo, revs):
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144 obsrevs = repo.revs(b'%ld and obsolete()', revs)
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145 for r in obsrevs:
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146 div = find_new_divergence_from(repo, repo[r])
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147 if div:
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148 return (repo[r], repo[div[0]], repo.unfiltered()[div[1]])
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149 return None
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150
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151
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152 def find_new_divergence_from(repo, ctx):
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153 """return divergent revision if rewriting an obsolete cset (ctx) will
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154 create divergence
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155
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156 Returns (<other node>, <common ancestor node>) or None
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157 """
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158 if not ctx.obsolete():
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159 return None
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160 # We need to check two cases that can cause divergence:
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161 # case 1: the rev being rewritten has a non-obsolete successor (easily
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162 # detected by successorssets)
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163 sset = obsutil.successorssets(repo, ctx.node())
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164 if sset:
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165 return (sset[0][0], ctx.node())
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166 else:
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167 # case 2: one of the precursors of the rev being revived has a
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168 # non-obsolete successor (we need divergentsets for this)
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169 divsets = obsutil.divergentsets(repo, ctx)
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170 if divsets:
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171 nsuccset = divsets[0][b'divergentnodes']
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172 prec = divsets[0][b'commonpredecessor']
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173 return (nsuccset[0], prec)
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174 return None
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175
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176
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177 def skip_empty_successor(ui, command):
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178 empty_successor = ui.config(b'rewrite', b'empty-successor')
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179 if empty_successor == b'skip':
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180 return True
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181 elif empty_successor == b'keep':
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182 return False
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183 else:
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184 raise error.ConfigError(
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185 _(
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186 b"%s doesn't know how to handle config "
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187 b"rewrite.empty-successor=%s (only 'skip' and 'keep' are "
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188 b"supported)"
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189 )
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190 % (command, empty_successor)
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191 )
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192
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193
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194 def update_hash_refs(repo, commitmsg, pending=None):
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195 """Replace all obsolete commit hashes in the message with the current hash.
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196
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197 If the obsolete commit was split or is divergent, the hash is not replaced
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198 as there's no way to know which successor to choose.
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199
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200 For commands that update a series of commits in the current transaction, the
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201 new obsolete markers can be considered by setting ``pending`` to a mapping
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202 of ``pending[oldnode] = [successor_node1, successor_node2,..]``.
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203 """
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204 if not pending:
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205 pending = {}
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206 cache = {}
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207 hashes = re.findall(NODE_RE, commitmsg)
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208 unfi = repo.unfiltered()
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209 for h in hashes:
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210 try:
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211 fullnode = scmutil.resolvehexnodeidprefix(unfi, h)
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212 except error.WdirUnsupported:
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213 # Someone has an fffff... in a commit message we're
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214 # rewriting. Don't try rewriting that.
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215 continue
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216 if fullnode is None:
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217 continue
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218 ctx = unfi[fullnode]
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219 if not ctx.obsolete():
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220 successors = pending.get(fullnode)
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221 if successors is None:
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222 continue
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223 # obsutil.successorssets() returns a list of list of nodes
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224 successors = [successors]
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225 else:
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226 successors = obsutil.successorssets(repo, ctx.node(), cache=cache)
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227
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228 # We can't make any assumptions about how to update the hash if the
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229 # cset in question was split or diverged.
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230 if len(successors) == 1 and len(successors[0]) == 1:
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231 successor = successors[0][0]
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232 if successor is not None:
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233 newhash = hex(successor)
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234 commitmsg = commitmsg.replace(h, newhash[: len(h)])
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diff changeset
235 else:
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diff changeset
236 repo.ui.note(
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diff changeset
237 _(
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238 b'The stale commit message reference to %s could '
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239 b'not be updated\n(The referenced commit was dropped)\n'
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diff changeset
240 )
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diff changeset
241 % h
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diff changeset
242 )
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diff changeset
243 else:
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diff changeset
244 repo.ui.note(
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diff changeset
245 _(
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246 b'The stale commit message reference to %s could '
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247 b'not be updated\n'
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248 )
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249 % h
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diff changeset
250 )
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diff changeset
251
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252 return commitmsg