annotate mercurial/rewriteutil.py @ 51719:7558cee89655

dirstate: stringify a few exception messages Built in exceptions want str, and ProgrammingError converts bytes to str internally (because it subclasses RuntimeError).
author Matt Harbison <matt_harbison@yahoo.com>
date Thu, 18 Jul 2024 22:46:36 -0400
parents d718eddf01d9
children f4733654f144
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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
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9 import re
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10
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11 from .i18n import _
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12 from .node import (
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13 hex,
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14 nullrev,
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15 )
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16
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17 from . import (
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18 error,
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19 node,
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20 obsolete,
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21 obsutil,
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22 revset,
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23 scmutil,
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24 )
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25
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26
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27 NODE_RE = re.compile(br'\b[0-9a-f]{6,64}\b')
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28
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29 # set of extra entry that should survive a rebase-like operation, extensible by extensions
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30 retained_extras_on_rebase = {
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31 b'source',
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32 b'intermediate-source',
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33 }
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34
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35
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36 def preserve_extras_on_rebase(old_ctx, new_extra):
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37 """preserve the relevant `extra` entry from old_ctx on rebase-like operation"""
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38 new_extra.update(
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39 (key, value)
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40 for key, value in old_ctx.extra().items()
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41 if key in retained_extras_on_rebase
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42 )
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43
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45 def _formatrevs(repo, revs, maxrevs=4):
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46 """returns a string summarizing revisions in a decent size
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47
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48 If there are few enough revisions, we list them all. Otherwise we display a
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49 summary of the form:
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50
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51 1ea73414a91b and 5 others
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52 """
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53 tonode = repo.changelog.node
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54 numrevs = len(revs)
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55 if numrevs < maxrevs:
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56 shorts = [node.short(tonode(r)) for r in revs]
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57 summary = b', '.join(shorts)
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58 else:
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59 first = revs.first()
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60 summary = _(b'%s and %d others')
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61 summary %= (node.short(tonode(first)), numrevs - 1)
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62 return summary
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63
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64
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65 def precheck(repo, revs, action=b'rewrite', check_divergence=True):
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66 """check if revs can be rewritten
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67 action is used to control the error message.
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68
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69 check_divergence allows skipping the divergence checks in cases like adding
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70 a prune marker (A, ()) to obsstore (which can't be diverging).
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71
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72 Make sure this function is called after taking the lock.
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73 """
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74 if nullrev in revs:
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75 msg = _(b"cannot %s the null revision") % action
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76 hint = _(b"no changeset checked out")
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77 raise error.InputError(msg, hint=hint)
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78
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79 if any(hasattr(r, 'rev') for r in revs):
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80 repo.ui.develwarn(b"rewriteutil.precheck called with ctx not revs")
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81 revs = (r.rev() for r in revs)
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82
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83 if len(repo[None].parents()) > 1:
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84 raise error.StateError(
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85 _(b"cannot %s changesets while merging") % action
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86 )
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87
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88 publicrevs = repo.revs(b'%ld and public()', revs)
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89 if publicrevs:
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90 summary = _formatrevs(repo, publicrevs)
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91 msg = _(b"cannot %s public changesets: %s") % (action, summary)
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92 hint = _(b"see 'hg help phases' for details")
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93 raise error.InputError(msg, hint=hint)
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94
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95 newunstable = disallowednewunstable(repo, revs)
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96 if newunstable:
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97 hint = _(b"see 'hg help evolution.instability'")
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98 raise error.InputError(
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99 _(b"cannot %s changeset, as that will orphan %d descendants")
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100 % (action, len(newunstable)),
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101 hint=hint,
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102 )
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103
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104 if not check_divergence:
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105 return
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106
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107 if not obsolete.isenabled(repo, obsolete.allowdivergenceopt):
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108 new_divergence = _find_new_divergence(repo, revs)
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109 if new_divergence:
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110 local_ctx, other_ctx, base_ctx = new_divergence
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111 msg = _(
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112 b'cannot %s %s, as that creates content-divergence with %s'
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113 ) % (
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114 action,
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115 local_ctx,
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116 other_ctx,
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117 )
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118 if local_ctx.rev() != base_ctx.rev():
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119 msg += _(b', from %s') % base_ctx
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120 if repo.ui.verbose:
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121 if local_ctx.rev() != base_ctx.rev():
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122 msg += _(
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123 b'\n changeset %s is a successor of ' b'changeset %s'
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124 ) % (local_ctx, base_ctx)
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125 msg += _(
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126 b'\n changeset %s already has a successor in '
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diff changeset
127 b'changeset %s\n'
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diff changeset
128 b' rewriting changeset %s would create '
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diff changeset
129 b'"content-divergence"\n'
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diff changeset
130 b' set experimental.evolution.allowdivergence=True to '
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131 b'skip this check'
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132 ) % (base_ctx, other_ctx, local_ctx)
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133 raise error.InputError(
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diff changeset
134 msg,
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Martin von Zweigbergk <martinvonz@google.com>
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diff changeset
135 hint=_(
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136 b"see 'hg help evolution.instability' for details on content-divergence"
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diff changeset
137 ),
8125bcd28a5c rewriteutil: add pointer to help text when rewrite would cause divergence
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parents: 47271
diff changeset
138 )
47020
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diff changeset
139 else:
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diff changeset
140 raise error.InputError(
47271
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diff changeset
141 msg,
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diff changeset
142 hint=_(
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diff changeset
143 b"add --verbose for details or see "
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144 b"'hg help evolution.instability'"
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145 ),
47020
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146 )
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diff changeset
147
43075
57875cf423c9 style: run a patched black on a subset of mercurial
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148
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149 def disallowednewunstable(repo, revs):
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150 """Checks whether editing the revs will create new unstable changesets and
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parents:
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151 are we allowed to create them.
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152
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diff changeset
153 To allow new unstable changesets, set the config:
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154 `experimental.evolution.allowunstable=True`
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parents:
diff changeset
155 """
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156 allowunstable = obsolete.isenabled(repo, obsolete.allowunstableopt)
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parents:
diff changeset
157 if allowunstable:
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diff changeset
158 return revset.baseset()
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159 return repo.revs(b"(%ld::) - %ld", revs, revs)
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160
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161
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162 def _find_new_divergence(repo, revs):
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163 obsrevs = repo.revs(b'%ld and obsolete()', revs)
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164 for r in obsrevs:
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165 div = find_new_divergence_from(repo, repo[r])
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166 if div:
47553
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167 return (repo[r], repo[div[0]], repo.unfiltered()[div[1]])
47020
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168 return None
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169
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170
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171 def find_new_divergence_from(repo, ctx):
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172 """return divergent revision if rewriting an obsolete cset (ctx) will
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173 create divergence
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diff changeset
174
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175 Returns (<other node>, <common ancestor node>) or None
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176 """
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diff changeset
177 if not ctx.obsolete():
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178 return None
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179 # We need to check two cases that can cause divergence:
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180 # case 1: the rev being rewritten has a non-obsolete successor (easily
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diff changeset
181 # detected by successorssets)
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182 sset = obsutil.successorssets(repo, ctx.node())
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diff changeset
183 if sset:
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184 return (sset[0][0], ctx.node())
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185 else:
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186 # case 2: one of the precursors of the rev being revived has a
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187 # non-obsolete successor (we need divergentsets for this)
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188 divsets = obsutil.divergentsets(repo, ctx)
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diff changeset
189 if divsets:
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diff changeset
190 nsuccset = divsets[0][b'divergentnodes']
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191 prec = divsets[0][b'commonpredecessor']
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diff changeset
192 return (nsuccset[0], prec)
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193 return None
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diff changeset
194
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diff changeset
195
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196 def skip_empty_successor(ui, command):
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197 empty_successor = ui.config(b'rewrite', b'empty-successor')
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198 if empty_successor == b'skip':
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199 return True
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200 elif empty_successor == b'keep':
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diff changeset
201 return False
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diff changeset
202 else:
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diff changeset
203 raise error.ConfigError(
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diff changeset
204 _(
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diff changeset
205 b"%s doesn't know how to handle config "
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diff changeset
206 b"rewrite.empty-successor=%s (only 'skip' and 'keep' are "
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diff changeset
207 b"supported)"
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diff changeset
208 )
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parents: 43077
diff changeset
209 % (command, empty_successor)
a391d0710f22 rewriteutil: add utility to check whether empty successors should be skipped
Manuel Jacob <me@manueljacob.de>
parents: 43077
diff changeset
210 )
45424
0a57ef4b3bdb rewriteutil: extract evolve code used to replace obsolete hashes in commits
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parents: 45122
diff changeset
211
0a57ef4b3bdb rewriteutil: extract evolve code used to replace obsolete hashes in commits
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parents: 45122
diff changeset
212
45425
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diff changeset
213 def update_hash_refs(repo, commitmsg, pending=None):
45424
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diff changeset
214 """Replace all obsolete commit hashes in the message with the current hash.
0a57ef4b3bdb rewriteutil: extract evolve code used to replace obsolete hashes in commits
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parents: 45122
diff changeset
215
0a57ef4b3bdb rewriteutil: extract evolve code used to replace obsolete hashes in commits
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parents: 45122
diff changeset
216 If the obsolete commit was split or is divergent, the hash is not replaced
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parents: 45122
diff changeset
217 as there's no way to know which successor to choose.
45425
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parents: 45424
diff changeset
218
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diff changeset
219 For commands that update a series of commits in the current transaction, the
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diff changeset
220 new obsolete markers can be considered by setting ``pending`` to a mapping
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parents: 45424
diff changeset
221 of ``pending[oldnode] = [successor_node1, successor_node2,..]``.
45424
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diff changeset
222 """
45425
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diff changeset
223 if not pending:
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diff changeset
224 pending = {}
45424
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diff changeset
225 cache = {}
45427
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diff changeset
226 hashes = re.findall(NODE_RE, commitmsg)
45424
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diff changeset
227 unfi = repo.unfiltered()
45427
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diff changeset
228 for h in hashes:
47787
48da5c325750 rewriteutil: fix crash when a rewritten message references f{6,64}
Augie Fackler <augie@google.com>
parents: 47553
diff changeset
229 try:
48da5c325750 rewriteutil: fix crash when a rewritten message references f{6,64}
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parents: 47553
diff changeset
230 fullnode = scmutil.resolvehexnodeidprefix(unfi, h)
49060
532b649c1deb rebase: while rewriting desc hashes, ignore ambiguous prefix "hashes"
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parents: 48991
diff changeset
231 except (error.WdirUnsupported, error.AmbiguousPrefixLookupError):
532b649c1deb rebase: while rewriting desc hashes, ignore ambiguous prefix "hashes"
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parents: 48991
diff changeset
232 # Someone has an fffff... or some other prefix that's ambiguous in a
532b649c1deb rebase: while rewriting desc hashes, ignore ambiguous prefix "hashes"
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parents: 48991
diff changeset
233 # commit message we're rewriting. Don't try rewriting that.
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parents: 47553
diff changeset
234 continue
45424
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diff changeset
235 if fullnode is None:
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diff changeset
236 continue
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diff changeset
237 ctx = unfi[fullnode]
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diff changeset
238 if not ctx.obsolete():
45425
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diff changeset
239 successors = pending.get(fullnode)
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diff changeset
240 if successors is None:
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parents: 45424
diff changeset
241 continue
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diff changeset
242 # obsutil.successorssets() returns a list of list of nodes
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diff changeset
243 successors = [successors]
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diff changeset
244 else:
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diff changeset
245 successors = obsutil.successorssets(repo, ctx.node(), cache=cache)
45424
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diff changeset
246
0a57ef4b3bdb rewriteutil: extract evolve code used to replace obsolete hashes in commits
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diff changeset
247 # We can't make any assumptions about how to update the hash if the
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parents: 45122
diff changeset
248 # cset in question was split or diverged.
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diff changeset
249 if len(successors) == 1 and len(successors[0]) == 1:
45711
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diff changeset
250 successor = successors[0][0]
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diff changeset
251 if successor is not None:
46113
59fa3890d40a node: import symbols explicitly
Joerg Sonnenberger <joerg@bec.de>
parents: 45853
diff changeset
252 newhash = hex(successor)
45711
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diff changeset
253 commitmsg = commitmsg.replace(h, newhash[: len(h)])
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diff changeset
254 else:
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diff changeset
255 repo.ui.note(
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parents: 45427
diff changeset
256 _(
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diff changeset
257 b'The stale commit message reference to %s could '
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diff changeset
258 b'not be updated\n(The referenced commit was dropped)\n'
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diff changeset
259 )
3d68b47e461b rewriteutil: handle dropped commits when updating description hashes
Matt Harbison <matt_harbison@yahoo.com>
parents: 45427
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260 % h
3d68b47e461b rewriteutil: handle dropped commits when updating description hashes
Matt Harbison <matt_harbison@yahoo.com>
parents: 45427
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261 )
45424
0a57ef4b3bdb rewriteutil: extract evolve code used to replace obsolete hashes in commits
Matt Harbison <matt_harbison@yahoo.com>
parents: 45122
diff changeset
262 else:
0a57ef4b3bdb rewriteutil: extract evolve code used to replace obsolete hashes in commits
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263 repo.ui.note(
0a57ef4b3bdb rewriteutil: extract evolve code used to replace obsolete hashes in commits
Matt Harbison <matt_harbison@yahoo.com>
parents: 45122
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264 _(
0a57ef4b3bdb rewriteutil: extract evolve code used to replace obsolete hashes in commits
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265 b'The stale commit message reference to %s could '
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266 b'not be updated\n'
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parents: 45122
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267 )
45427
78861610ded8 rewriteutil: relax the sha1 hash references to handle future hash types
Matt Harbison <matt_harbison@yahoo.com>
parents: 45425
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268 % h
45424
0a57ef4b3bdb rewriteutil: extract evolve code used to replace obsolete hashes in commits
Matt Harbison <matt_harbison@yahoo.com>
parents: 45122
diff changeset
269 )
0a57ef4b3bdb rewriteutil: extract evolve code used to replace obsolete hashes in commits
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parents: 45122
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270
0a57ef4b3bdb rewriteutil: extract evolve code used to replace obsolete hashes in commits
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271 return commitmsg