Mercurial > public > mercurial-scm > hg-stable

annotate mercurial/upgrade_utils/auto_upgrade.py @ 49232:71774d799de7

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auto-upgrade: skip the operation if the repository cannot be locked This seems like a fine default behavior for now. If some users wants something more aggressive we can make the behavior configurable in the future. Differential Revision: https://phab.mercurial-scm.org/D12619
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Tue, 05 Apr 2022 05:01:58 +0200
parents 411d591e0a27
children 9e203cda3238
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1 # upgrade.py - functions for automatic upgrade of Mercurial repository
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2 #
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3 # Copyright (c) 2022-present, Pierre-Yves David
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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 from ..i18n import _
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8
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9 from .. import (
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10 error,
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11 requirements as requirementsmod,
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12 scmutil,
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13 )
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14
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15 from . import (
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16 actions,
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17 engine,
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18 )
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19
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20
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21 class AutoUpgradeOperation(actions.BaseOperation):
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22 """A limited Upgrade Operation used to run simple auto upgrade task
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23
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24 (Expand it as needed in the future)
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25 """
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26
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27 def __init__(self, req):
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28 super().__init__(
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29 new_requirements=req,
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30 backup_store=False,
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31 )
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32
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33
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34 def get_share_safe_action(repo):
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35 """return an automatic-upgrade action for `share-safe` if applicable
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36
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37 If no action is needed, return None, otherwise return a callback to upgrade
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38 or downgrade the repository according the configuration and repository
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39 format.
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40 """
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41 ui = repo.ui
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42 requirements = repo.requirements
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43 auto_upgrade_share_source = ui.configbool(
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44 b'format',
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45 b'use-share-safe.automatic-upgrade-of-mismatching-repositories',
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46 )
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47
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48 action = None
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49
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50 if (
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51 auto_upgrade_share_source
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52 and requirementsmod.SHARED_REQUIREMENT not in requirements
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53 ):
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54 sf_config = ui.configbool(b'format', b'use-share-safe')
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55 sf_local = requirementsmod.SHARESAFE_REQUIREMENT in requirements
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56 if sf_config and not sf_local:
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57 msg = _(
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58 b"automatically upgrading repository to the `share-safe`"
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59 b" feature\n"
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60 )
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61 hint = b"(see `hg help config.format.use-share-safe` for details)\n"
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62
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63 def action():
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64 if not ui.quiet:
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65 ui.write_err(msg)
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66 ui.write_err(hint)
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67 requirements.add(requirementsmod.SHARESAFE_REQUIREMENT)
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68 scmutil.writereporequirements(repo, requirements)
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69
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70 elif sf_local and not sf_config:
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71 msg = _(
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72 b"automatically downgrading repository from the `share-safe`"
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73 b" feature\n"
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74 )
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75 hint = b"(see `hg help config.format.use-share-safe` for details)\n"
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76
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77 def action():
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78 if not ui.quiet:
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79 ui.write_err(msg)
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80 ui.write_err(hint)
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81 requirements.discard(requirementsmod.SHARESAFE_REQUIREMENT)
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82 scmutil.writereporequirements(repo, requirements)
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83
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84 return action
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85
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86
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87 def get_tracked_hint_action(repo):
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88 """return an automatic-upgrade action for `tracked-hint` if applicable
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89
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90 If no action is needed, return None, otherwise return a callback to upgrade
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91 or downgrade the repository according the configuration and repository
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92 format.
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93 """
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94 ui = repo.ui
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95 requirements = set(repo.requirements)
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96 auto_upgrade_tracked_hint = ui.configbool(
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97 b'format',
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98 b'use-dirstate-tracked-hint.automatic-upgrade-of-mismatching-repositories',
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99 )
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100
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101 action = None
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102
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103 if auto_upgrade_tracked_hint:
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104 th_config = ui.configbool(b'format', b'use-dirstate-tracked-hint')
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105 th_local = requirementsmod.DIRSTATE_TRACKED_HINT_V1 in requirements
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106 if th_config and not th_local:
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107 msg = _(
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108 b"automatically upgrading repository to the `tracked-hint`"
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109 b" feature\n"
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110 )
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111 hint = b"(see `hg help config.format.use-dirstate-tracked-hint` for details)\n"
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112
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113 def action():
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114 if not ui.quiet:
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115 ui.write_err(msg)
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116 ui.write_err(hint)
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117 requirements.add(requirementsmod.DIRSTATE_TRACKED_HINT_V1)
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118 op = AutoUpgradeOperation(requirements)
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119 engine.upgrade_tracked_hint(ui, repo, op, add=True)
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120
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121 elif th_local and not th_config:
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122 msg = _(
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123 b"automatically downgrading repository from the `tracked-hint`"
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124 b" feature\n"
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125 )
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126 hint = b"(see `hg help config.format.use-dirstate-tracked-hint` for details)\n"
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127
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128 def action():
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129 if not ui.quiet:
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130 ui.write_err(msg)
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131 ui.write_err(hint)
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132 requirements.discard(requirementsmod.DIRSTATE_TRACKED_HINT_V1)
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133 op = AutoUpgradeOperation(requirements)
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134 engine.upgrade_tracked_hint(ui, repo, op, add=False)
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135
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136 return action
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137
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138
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139 def get_dirstate_v2_action(repo):
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140 """return an automatic-upgrade action for `dirstate-v2` if applicable
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141
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142 If no action is needed, return None, otherwise return a callback to upgrade
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143 or downgrade the repository according the configuration and repository
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144 format.
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145 """
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146 ui = repo.ui
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147 requirements = set(repo.requirements)
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148 auto_upgrade_tracked_hint = ui.configbool(
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149 b'format',
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150 b'use-dirstate-v2.automatic-upgrade-of-mismatching-repositories',
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151 )
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152
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153 action = None
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154
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155 if auto_upgrade_tracked_hint:
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156 d2_config = ui.configbool(b'format', b'use-dirstate-v2')
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157 d2_local = requirementsmod.DIRSTATE_V2_REQUIREMENT in requirements
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158 if d2_config and not d2_local:
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159 msg = _(
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160 b"automatically upgrading repository to the `dirstate-v2`"
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161 b" feature\n"
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162 )
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163 hint = (
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164 b"(see `hg help config.format.use-dirstate-v2` for details)\n"
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165 )
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166
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167 def action():
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168 if not ui.quiet:
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169 ui.write_err(msg)
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170 ui.write_err(hint)
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171 requirements.add(requirementsmod.DIRSTATE_V2_REQUIREMENT)
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172 fake_op = AutoUpgradeOperation(requirements)
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173 engine.upgrade_dirstate(repo.ui, repo, fake_op, b'v1', b'v2')
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174
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175 elif d2_local and not d2_config:
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176 msg = _(
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177 b"automatically downgrading repository from the `dirstate-v2`"
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178 b" feature\n"
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179 )
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180 hint = (
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181 b"(see `hg help config.format.use-dirstate-v2` for details)\n"
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182 )
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183
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184 def action():
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185 if not ui.quiet:
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186 ui.write_err(msg)
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187 ui.write_err(hint)
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188 requirements.discard(requirementsmod.DIRSTATE_V2_REQUIREMENT)
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189 fake_op = AutoUpgradeOperation(requirements)
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190 engine.upgrade_dirstate(repo.ui, repo, fake_op, b'v2', b'v1')
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191
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192 return action
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193
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194
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195 AUTO_UPGRADE_ACTIONS = [
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196 get_dirstate_v2_action,
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197 get_share_safe_action,
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198 get_tracked_hint_action,
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199 ]
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200
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201
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202 def may_auto_upgrade(repo, maker_func):
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203 """potentially perform auto-upgrade and return the final repository to use
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204
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205 Auto-upgrade are "quick" repository upgrade that might automatically be run
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206 by "any" repository access. See `hg help config.format` for automatic
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207 upgrade documentation.
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208
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209 note: each relevant upgrades are done one after the other for simplicity.
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210 This avoid having repository is partially inconsistent state while
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211 upgrading.
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212
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213 repo: the current repository instance
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214 maker_func: a factory function that can recreate a repository after an upgrade
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215 """
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216 clear = False
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217
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218 loop = 0
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219
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220 try:
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221 while not clear:
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222 loop += 1
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223 if loop > 100:
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224 # XXX basic protection against infinite loop, make it better.
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225 raise error.ProgrammingError("Too many auto upgrade loops")
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226 clear = True
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227 for get_action in AUTO_UPGRADE_ACTIONS:
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228 action = get_action(repo)
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229 if action is not None:
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230 clear = False
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231 with repo.wlock(wait=False), repo.lock(wait=False):
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232 action = get_action(repo)
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233 if action is not None:
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234 action()
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235 repo = maker_func()
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236 except error.LockError:
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237 # if we cannot get the lock, ignore the auto-upgrade attemps and
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238 # proceed. We might want to make this behavior configurable in the
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239 # future.
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240 pass
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241
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242 return repo