Mercurial > hg
annotate mercurial/upgrade.py @ 46924:ca0049946e9a
split: avoid strip if split is a no-op (identical to original)
Differential Revision: https://phab.mercurial-scm.org/D10389
author | Kyle Lippincott <spectral@google.com> |
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date | Mon, 12 Apr 2021 19:25:34 -0700 |
parents | 16c18d5e5dc8 |
children | cb477edeca79 6e045497b20b |
rev | line source |
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1 # upgrade.py - functions for in place upgrade of Mercurial repository |
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2 # |
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3 # Copyright (c) 2016-present, Gregory Szorc |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 from __future__ import absolute_import |
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9 |
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10 from .i18n import _ |
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11 from . import ( |
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12 error, |
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13 hg, |
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14 localrepo, |
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15 lock as lockmod, |
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16 pycompat, |
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17 requirements as requirementsmod, |
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18 scmutil, |
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19 ) |
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20 |
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21 from .upgrade_utils import ( |
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22 actions as upgrade_actions, |
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23 engine as upgrade_engine, |
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24 ) |
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25 |
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26 from .utils import ( |
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27 stringutil, |
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28 ) |
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29 |
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30 allformatvariant = upgrade_actions.allformatvariant |
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31 |
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32 |
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33 def upgraderepo( |
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34 ui, |
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35 repo, |
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36 run=False, |
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37 optimize=None, |
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38 backup=True, |
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39 manifest=None, |
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40 changelog=None, |
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41 filelogs=None, |
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42 ): |
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43 """Upgrade a repository in place.""" |
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44 if optimize is None: |
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45 optimize = {} |
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46 repo = repo.unfiltered() |
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47 |
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48 revlogs = set(upgrade_engine.UPGRADE_ALL_REVLOGS) |
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49 specentries = ( |
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50 (upgrade_engine.UPGRADE_CHANGELOG, changelog), |
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51 (upgrade_engine.UPGRADE_MANIFEST, manifest), |
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52 (upgrade_engine.UPGRADE_FILELOGS, filelogs), |
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53 ) |
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54 specified = [(y, x) for (y, x) in specentries if x is not None] |
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55 if specified: |
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56 # we have some limitation on revlogs to be recloned |
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57 if any(x for y, x in specified): |
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58 revlogs = set() |
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59 for upgrade, enabled in specified: |
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60 if enabled: |
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61 revlogs.add(upgrade) |
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62 else: |
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63 # none are enabled |
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64 for upgrade, __ in specified: |
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65 revlogs.discard(upgrade) |
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66 |
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67 # Ensure the repository can be upgraded. |
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68 upgrade_actions.check_source_requirements(repo) |
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69 |
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70 default_options = localrepo.defaultcreateopts(repo.ui) |
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71 newreqs = localrepo.newreporequirements(repo.ui, default_options) |
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72 newreqs.update(upgrade_actions.preservedrequirements(repo)) |
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73 |
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74 upgrade_actions.check_requirements_changes(repo, newreqs) |
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75 |
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76 # Find and validate all improvements that can be made. |
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77 alloptimizations = upgrade_actions.findoptimizations(repo) |
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78 |
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79 # Apply and Validate arguments. |
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80 optimizations = [] |
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81 for o in alloptimizations: |
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82 if o.name in optimize: |
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83 optimizations.append(o) |
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84 optimize.discard(o.name) |
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85 |
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86 if optimize: # anything left is unknown |
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87 raise error.Abort( |
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88 _(b'unknown optimization action requested: %s') |
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89 % b', '.join(sorted(optimize)), |
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90 hint=_(b'run without arguments to see valid optimizations'), |
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91 ) |
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92 |
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93 format_upgrades = upgrade_actions.find_format_upgrades(repo) |
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94 up_actions = upgrade_actions.determine_upgrade_actions( |
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95 repo, format_upgrades, optimizations, repo.requirements, newreqs |
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96 ) |
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97 removed_actions = upgrade_actions.find_format_downgrades(repo) |
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98 |
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99 removedreqs = repo.requirements - newreqs |
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100 addedreqs = newreqs - repo.requirements |
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101 |
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102 if revlogs != upgrade_engine.UPGRADE_ALL_REVLOGS: |
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103 incompatible = upgrade_actions.RECLONES_REQUIREMENTS & ( |
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104 removedreqs | addedreqs |
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105 ) |
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106 if incompatible: |
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107 msg = _( |
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108 b'ignoring revlogs selection flags, format requirements ' |
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109 b'change: %s\n' |
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110 ) |
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111 ui.warn(msg % b', '.join(sorted(incompatible))) |
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112 revlogs = upgrade_engine.UPGRADE_ALL_REVLOGS |
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113 |
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114 upgrade_op = upgrade_actions.UpgradeOperation( |
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115 ui, |
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116 newreqs, |
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117 repo.requirements, |
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118 up_actions, |
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119 removed_actions, |
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120 revlogs, |
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121 backup, |
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122 ) |
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123 |
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124 if not run: |
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125 fromconfig = [] |
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126 onlydefault = [] |
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127 |
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128 for d in format_upgrades: |
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129 if d.fromconfig(repo): |
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130 fromconfig.append(d) |
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131 elif d.default: |
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132 onlydefault.append(d) |
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133 |
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134 if fromconfig or onlydefault: |
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135 |
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136 if fromconfig: |
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137 ui.status( |
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138 _( |
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139 b'repository lacks features recommended by ' |
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140 b'current config options:\n\n' |
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141 ) |
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142 ) |
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143 for i in fromconfig: |
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144 ui.status(b'%s\n %s\n\n' % (i.name, i.description)) |
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145 |
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146 if onlydefault: |
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147 ui.status( |
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148 _( |
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149 b'repository lacks features used by the default ' |
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150 b'config options:\n\n' |
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151 ) |
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152 ) |
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153 for i in onlydefault: |
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154 ui.status(b'%s\n %s\n\n' % (i.name, i.description)) |
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155 |
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156 ui.status(b'\n') |
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157 else: |
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158 ui.status(_(b'(no format upgrades found in existing repository)\n')) |
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159 |
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160 ui.status( |
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161 _( |
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162 b'performing an upgrade with "--run" will make the following ' |
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163 b'changes:\n\n' |
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164 ) |
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165 ) |
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166 |
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167 upgrade_op.print_requirements() |
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168 upgrade_op.print_optimisations() |
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169 upgrade_op.print_upgrade_actions() |
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170 upgrade_op.print_affected_revlogs() |
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171 |
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172 if upgrade_op.unused_optimizations: |
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173 ui.status( |
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174 _( |
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175 b'additional optimizations are available by specifying ' |
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176 b'"--optimize <name>":\n\n' |
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177 ) |
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178 ) |
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179 upgrade_op.print_unused_optimizations() |
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180 return |
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181 |
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182 if not (upgrade_op.upgrade_actions or upgrade_op.removed_actions): |
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183 ui.status(_(b'nothing to do\n')) |
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184 return |
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185 # Else we're in the run=true case. |
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186 ui.write(_(b'upgrade will perform the following actions:\n\n')) |
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187 upgrade_op.print_requirements() |
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188 upgrade_op.print_optimisations() |
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189 upgrade_op.print_upgrade_actions() |
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190 upgrade_op.print_affected_revlogs() |
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191 |
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192 ui.status(_(b'beginning upgrade...\n')) |
33438 | 193 with repo.wlock(), repo.lock(): |
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194 ui.status(_(b'repository locked and read-only\n')) |
33438 | 195 # Our strategy for upgrading the repository is to create a new, |
196 # temporary repository, write data to it, then do a swap of the | |
197 # data. There are less heavyweight ways to do this, but it is easier | |
198 # to create a new repo object than to instantiate all the components | |
199 # (like the store) separately. | |
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200 tmppath = pycompat.mkdtemp(prefix=b'upgrade.', dir=repo.path) |
33438 | 201 backuppath = None |
202 try: | |
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203 ui.status( |
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204 _( |
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205 b'creating temporary repository to stage upgraded ' |
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206 b'data: %s\n' |
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207 ) |
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208 % tmppath |
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209 ) |
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210 |
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211 # clone ui without using ui.copy because repo.ui is protected |
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212 repoui = repo.ui.__class__(repo.ui) |
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213 dstrepo = hg.repository(repoui, path=tmppath, create=True) |
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214 |
33438 | 215 with dstrepo.wlock(), dstrepo.lock(): |
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216 backuppath = upgrade_engine.upgrade( |
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217 ui, repo, dstrepo, upgrade_op |
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218 ) |
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219 |
33438 | 220 finally: |
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221 ui.status(_(b'removing temporary repository %s\n') % tmppath) |
33438 | 222 repo.vfs.rmtree(tmppath, forcibly=True) |
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223 |
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224 if backuppath and not ui.quiet: |
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225 ui.warn( |
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226 _(b'copy of old repository backed up at %s\n') % backuppath |
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227 ) |
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228 ui.warn( |
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229 _( |
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230 b'the old repository will not be deleted; remove ' |
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231 b'it to free up disk space once the upgraded ' |
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232 b'repository is verified\n' |
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233 ) |
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234 ) |
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235 |
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236 upgrade_op.print_post_op_messages() |
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237 |
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238 |
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239 def upgrade_share_to_safe( |
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240 ui, |
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241 hgvfs, |
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242 storevfs, |
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243 current_requirements, |
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244 mismatch_config, |
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245 mismatch_warn, |
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246 ): |
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247 """Upgrades a share to use share-safe mechanism""" |
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248 wlock = None |
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249 store_requirements = localrepo._readrequires(storevfs, False) |
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250 original_crequirements = current_requirements.copy() |
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251 # after upgrade, store requires will be shared, so lets find |
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252 # the requirements which are not present in store and |
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253 # write them to share's .hg/requires |
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254 diffrequires = current_requirements - store_requirements |
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255 # add share-safe requirement as it will mark the share as share-safe |
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256 diffrequires.add(requirementsmod.SHARESAFE_REQUIREMENT) |
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257 current_requirements.add(requirementsmod.SHARESAFE_REQUIREMENT) |
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258 # in `allow` case, we don't try to upgrade, we just respect the source |
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259 # state, update requirements and continue |
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260 if mismatch_config == b'allow': |
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261 return |
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262 try: |
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263 wlock = lockmod.trylock(ui, hgvfs, b'wlock', 0, 0) |
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264 # some process might change the requirement in between, re-read |
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265 # and update current_requirements |
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266 locked_requirements = localrepo._readrequires(hgvfs, True) |
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267 if locked_requirements != original_crequirements: |
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268 removed = current_requirements - locked_requirements |
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269 # update current_requirements in place because it's passed |
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270 # as reference |
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271 current_requirements -= removed |
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272 current_requirements |= locked_requirements |
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273 diffrequires = current_requirements - store_requirements |
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274 # add share-safe requirement as it will mark the share as share-safe |
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275 diffrequires.add(requirementsmod.SHARESAFE_REQUIREMENT) |
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276 current_requirements.add(requirementsmod.SHARESAFE_REQUIREMENT) |
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277 scmutil.writerequires(hgvfs, diffrequires) |
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278 ui.warn(_(b'repository upgraded to use share-safe mode\n')) |
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279 except error.LockError as e: |
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280 hint = _( |
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281 "see `hg help config.format.use-share-safe` for more information" |
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282 ) |
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283 if mismatch_config == b'upgrade-abort': |
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284 raise error.Abort( |
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285 _(b'failed to upgrade share, got error: %s') |
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286 % stringutil.forcebytestr(e.strerror), |
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287 hint=hint, |
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288 ) |
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289 elif mismatch_warn: |
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290 ui.warn( |
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291 _(b'failed to upgrade share, got error: %s\n') |
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292 % stringutil.forcebytestr(e.strerror), |
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293 hint=hint, |
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294 ) |
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295 finally: |
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296 if wlock: |
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297 wlock.release() |
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298 |
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299 |
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300 def downgrade_share_to_non_safe( |
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301 ui, |
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302 hgvfs, |
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303 sharedvfs, |
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304 current_requirements, |
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305 mismatch_config, |
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306 mismatch_warn, |
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307 ): |
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308 """Downgrades a share which use share-safe to not use it""" |
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309 wlock = None |
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310 source_requirements = localrepo._readrequires(sharedvfs, True) |
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311 original_crequirements = current_requirements.copy() |
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312 # we cannot be 100% sure on which requirements were present in store when |
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313 # the source supported share-safe. However, we do know that working |
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314 # directory requirements were not there. Hence we remove them |
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315 source_requirements -= requirementsmod.WORKING_DIR_REQUIREMENTS |
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316 current_requirements |= source_requirements |
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317 current_requirements.remove(requirementsmod.SHARESAFE_REQUIREMENT) |
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318 if mismatch_config == b'allow': |
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319 return |
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320 |
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321 try: |
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322 wlock = lockmod.trylock(ui, hgvfs, b'wlock', 0, 0) |
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323 # some process might change the requirement in between, re-read |
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324 # and update current_requirements |
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325 locked_requirements = localrepo._readrequires(hgvfs, True) |
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326 if locked_requirements != original_crequirements: |
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327 removed = current_requirements - locked_requirements |
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328 # update current_requirements in place because it's passed |
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329 # as reference |
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330 current_requirements -= removed |
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331 current_requirements |= locked_requirements |
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332 current_requirements |= source_requirements |
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333 current_requirements -= set(requirementsmod.SHARESAFE_REQUIREMENT) |
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334 scmutil.writerequires(hgvfs, current_requirements) |
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335 ui.warn(_(b'repository downgraded to not use share-safe mode\n')) |
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336 except error.LockError as e: |
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337 hint = _( |
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338 "see `hg help config.format.use-share-safe` for more information" |
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339 ) |
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340 # If upgrade-abort is set, abort when upgrade fails, else let the |
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341 # process continue as `upgrade-allow` is set |
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342 if mismatch_config == b'downgrade-abort': |
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343 raise error.Abort( |
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344 _(b'failed to downgrade share, got error: %s') |
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345 % stringutil.forcebytestr(e.strerror), |
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346 hint=hint, |
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347 ) |
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348 elif mismatch_warn: |
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349 ui.warn( |
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350 _(b'failed to downgrade share, got error: %s\n') |
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351 % stringutil.forcebytestr(e.strerror), |
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352 hint=hint, |
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353 ) |
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354 finally: |
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355 if wlock: |
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356 wlock.release() |