Mercurial > hg
annotate mercurial/upgrade.py @ 31987:8823daaf4665
obsolescence: add test for the "branch replacement" logic during push, case D2
Mercurial checks for the introduction of new heads on push. Evolution comes
into play to detect if existing branches on the server are being replaced by
some of the new one we push.
The current code for this logic is very basic (eg: issue4354) and was poorly
tested. We have a better implementation coming in the evolve extension fixing
these issues and with more serious tests coverage. In the process of upstreaming
this improved logic, we start with adding the test case that are already passing
with the current implementation. Once they are all in, we'll upstream the better
implementation and the extra test cases.
See inline documentation for details about the test case added in this
changeset.
author | Pierre-Yves David <pierre-yves.david@ens-lyon.org> |
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date | Thu, 13 Apr 2017 16:27:42 +0200 |
parents | 3c77f03f16b3 |
children | 99f63f476a72 |
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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 import stat |
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11 import tempfile |
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12 |
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13 from .i18n import _ |
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14 from . import ( |
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15 changelog, |
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16 error, |
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17 localrepo, |
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18 manifest, |
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19 revlog, |
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20 scmutil, |
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21 util, |
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22 vfs as vfsmod, |
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23 ) |
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24 |
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25 def requiredsourcerequirements(repo): |
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26 """Obtain requirements required to be present to upgrade a repo. |
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27 |
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28 An upgrade will not be allowed if the repository doesn't have the |
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29 requirements returned by this function. |
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30 """ |
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31 return set([ |
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32 # Introduced in Mercurial 0.9.2. |
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33 'revlogv1', |
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34 # Introduced in Mercurial 0.9.2. |
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35 'store', |
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36 ]) |
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37 |
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38 def blocksourcerequirements(repo): |
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39 """Obtain requirements that will prevent an upgrade from occurring. |
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40 |
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41 An upgrade cannot be performed if the source repository contains a |
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42 requirements in the returned set. |
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43 """ |
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44 return set([ |
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45 # The upgrade code does not yet support these experimental features. |
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46 # This is an artificial limitation. |
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47 'manifestv2', |
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48 'treemanifest', |
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49 # This was a precursor to generaldelta and was never enabled by default. |
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50 # It should (hopefully) not exist in the wild. |
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51 'parentdelta', |
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52 # Upgrade should operate on the actual store, not the shared link. |
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53 'shared', |
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54 ]) |
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55 |
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56 def supportremovedrequirements(repo): |
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57 """Obtain requirements that can be removed during an upgrade. |
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58 |
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59 If an upgrade were to create a repository that dropped a requirement, |
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60 the dropped requirement must appear in the returned set for the upgrade |
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61 to be allowed. |
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62 """ |
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63 return set() |
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64 |
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65 def supporteddestrequirements(repo): |
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66 """Obtain requirements that upgrade supports in the destination. |
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67 |
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68 If the result of the upgrade would create requirements not in this set, |
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69 the upgrade is disallowed. |
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70 |
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71 Extensions should monkeypatch this to add their custom requirements. |
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72 """ |
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73 return set([ |
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74 'dotencode', |
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75 'fncache', |
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76 'generaldelta', |
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77 'revlogv1', |
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78 'store', |
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79 ]) |
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80 |
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81 def allowednewrequirements(repo): |
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82 """Obtain requirements that can be added to a repository during upgrade. |
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83 |
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84 This is used to disallow proposed requirements from being added when |
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85 they weren't present before. |
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86 |
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87 We use a list of allowed requirement additions instead of a list of known |
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88 bad additions because the whitelist approach is safer and will prevent |
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89 future, unknown requirements from accidentally being added. |
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90 """ |
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91 return set([ |
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92 'dotencode', |
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93 'fncache', |
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94 'generaldelta', |
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95 ]) |
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96 |
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97 deficiency = 'deficiency' |
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98 optimisation = 'optimization' |
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99 |
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100 class improvement(object): |
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101 """Represents an improvement that can be made as part of an upgrade. |
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102 |
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103 The following attributes are defined on each instance: |
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104 |
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105 name |
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106 Machine-readable string uniquely identifying this improvement. It |
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107 will be mapped to an action later in the upgrade process. |
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108 |
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109 type |
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110 Either ``deficiency`` or ``optimisation``. A deficiency is an obvious |
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111 problem. An optimization is an action (sometimes optional) that |
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112 can be taken to further improve the state of the repository. |
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113 |
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114 description |
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115 Message intended for humans explaining the improvement in more detail, |
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116 including the implications of it. For ``deficiency`` types, should be |
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117 worded in the present tense. For ``optimisation`` types, should be |
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118 worded in the future tense. |
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119 |
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120 upgrademessage |
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121 Message intended for humans explaining what an upgrade addressing this |
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122 issue will do. Should be worded in the future tense. |
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123 |
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124 fromdefault (``deficiency`` types only) |
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125 Boolean indicating whether the current (deficient) state deviates |
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126 from Mercurial's default configuration. |
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127 |
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128 fromconfig (``deficiency`` types only) |
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129 Boolean indicating whether the current (deficient) state deviates |
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130 from the current Mercurial configuration. |
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131 """ |
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132 def __init__(self, name, type, description, upgrademessage, **kwargs): |
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133 self.name = name |
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134 self.type = type |
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135 self.description = description |
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136 self.upgrademessage = upgrademessage |
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137 |
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138 for k, v in kwargs.items(): |
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139 setattr(self, k, v) |
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140 |
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141 def __eq__(self, other): |
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142 if not isinstance(other, improvement): |
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143 # This is what python tell use to do |
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144 return NotImplemented |
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145 return self.name == other.name |
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146 |
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147 def finddeficiencies(repo): |
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148 """returns a list of deficiencies that the repo suffer from""" |
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149 newreporeqs = localrepo.newreporequirements(repo) |
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150 |
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151 deficiencies = [] |
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152 |
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153 # We could detect lack of revlogv1 and store here, but they were added |
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154 # in 0.9.2 and we don't support upgrading repos without these |
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155 # requirements, so let's not bother. |
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156 |
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157 if 'fncache' not in repo.requirements: |
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158 deficiencies.append(improvement( |
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159 name='fncache', |
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160 type=deficiency, |
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161 description=_('long and reserved filenames may not work correctly; ' |
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162 'repository performance is sub-optimal'), |
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163 upgrademessage=_('repository will be more resilient to storing ' |
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164 'certain paths and performance of certain ' |
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165 'operations should be improved'), |
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166 fromdefault=True, |
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167 fromconfig='fncache' in newreporeqs)) |
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168 |
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169 if 'dotencode' not in repo.requirements: |
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170 deficiencies.append(improvement( |
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171 name='dotencode', |
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172 type=deficiency, |
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173 description=_('storage of filenames beginning with a period or ' |
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174 'space may not work correctly'), |
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175 upgrademessage=_('repository will be better able to store files ' |
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176 'beginning with a space or period'), |
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177 fromdefault=True, |
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178 fromconfig='dotencode' in newreporeqs)) |
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179 |
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180 if 'generaldelta' not in repo.requirements: |
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181 deficiencies.append(improvement( |
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182 name='generaldelta', |
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183 type=deficiency, |
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184 description=_('deltas within internal storage are unable to ' |
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185 'choose optimal revisions; repository is larger and ' |
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186 'slower than it could be; interaction with other ' |
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187 'repositories may require extra network and CPU ' |
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188 'resources, making "hg push" and "hg pull" slower'), |
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189 upgrademessage=_('repository storage will be able to create ' |
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190 'optimal deltas; new repository data will be ' |
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191 'smaller and read times should decrease; ' |
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192 'interacting with other repositories using this ' |
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193 'storage model should require less network and ' |
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194 'CPU resources, making "hg push" and "hg pull" ' |
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195 'faster'), |
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196 fromdefault=True, |
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197 fromconfig='generaldelta' in newreporeqs)) |
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198 |
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199 # Mercurial 4.0 changed changelogs to not use delta chains. Search for |
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200 # changelogs with deltas. |
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201 cl = repo.changelog |
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202 for rev in cl: |
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203 chainbase = cl.chainbase(rev) |
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204 if chainbase != rev: |
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205 deficiencies.append(improvement( |
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206 name='removecldeltachain', |
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207 type=deficiency, |
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208 description=_('changelog storage is using deltas instead of ' |
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209 'raw entries; changelog reading and any ' |
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210 'operation relying on changelog data are slower ' |
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211 'than they could be'), |
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212 upgrademessage=_('changelog storage will be reformated to ' |
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213 'store raw entries; changelog reading will be ' |
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214 'faster; changelog size may be reduced'), |
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215 fromdefault=True, |
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216 fromconfig=True)) |
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217 break |
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218 |
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219 return deficiencies |
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220 |
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221 def findoptimizations(repo): |
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222 """Determine optimisation that could be used during upgrade""" |
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223 # These are unconditionally added. There is logic later that figures out |
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224 # which ones to apply. |
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225 optimizations = [] |
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226 |
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227 optimizations.append(improvement( |
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228 name='redeltaparent', |
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229 type=optimisation, |
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230 description=_('deltas within internal storage will be recalculated to ' |
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231 'choose an optimal base revision where this was not ' |
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232 'already done; the size of the repository may shrink and ' |
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233 'various operations may become faster; the first time ' |
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234 'this optimization is performed could slow down upgrade ' |
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235 'execution considerably; subsequent invocations should ' |
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236 'not run noticeably slower'), |
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237 upgrademessage=_('deltas within internal storage will choose a new ' |
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238 'base revision if needed'))) |
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239 |
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240 optimizations.append(improvement( |
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241 name='redeltamultibase', |
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242 type=optimisation, |
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243 description=_('deltas within internal storage will be recalculated ' |
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244 'against multiple base revision and the smallest ' |
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245 'difference will be used; the size of the repository may ' |
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246 'shrink significantly when there are many merges; this ' |
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247 'optimization will slow down execution in proportion to ' |
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248 'the number of merges in the repository and the amount ' |
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249 'of files in the repository; this slow down should not ' |
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250 'be significant unless there are tens of thousands of ' |
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251 'files and thousands of merges'), |
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252 upgrademessage=_('deltas within internal storage will choose an ' |
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253 'optimal delta by computing deltas against multiple ' |
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254 'parents; may slow down execution time ' |
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255 'significantly'))) |
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256 |
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257 optimizations.append(improvement( |
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258 name='redeltaall', |
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259 type=optimisation, |
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260 description=_('deltas within internal storage will always be ' |
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261 'recalculated without reusing prior deltas; this will ' |
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262 'likely make execution run several times slower; this ' |
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263 'optimization is typically not needed'), |
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264 upgrademessage=_('deltas within internal storage will be fully ' |
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265 'recomputed; this will likely drastically slow down ' |
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266 'execution time'))) |
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267 |
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268 return optimizations |
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269 |
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270 def determineactions(repo, deficiencies, sourcereqs, destreqs): |
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271 """Determine upgrade actions that will be performed. |
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272 |
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273 Given a list of improvements as returned by ``finddeficiencies`` and |
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274 ``findoptimizations``, determine the list of upgrade actions that |
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275 will be performed. |
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276 |
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277 The role of this function is to filter improvements if needed, apply |
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278 recommended optimizations from the improvements list that make sense, |
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279 etc. |
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280 |
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281 Returns a list of action names. |
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282 """ |
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283 newactions = [] |
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284 |
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285 knownreqs = supporteddestrequirements(repo) |
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286 |
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287 for d in deficiencies: |
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288 name = d.name |
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289 |
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290 # If the action is a requirement that doesn't show up in the |
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291 # destination requirements, prune the action. |
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292 if name in knownreqs and name not in destreqs: |
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293 continue |
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294 |
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295 newactions.append(d) |
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296 |
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297 # FUTURE consider adding some optimizations here for certain transitions. |
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298 # e.g. adding generaldelta could schedule parent redeltas. |
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299 |
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300 return newactions |
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301 |
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302 def _revlogfrompath(repo, path): |
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303 """Obtain a revlog from a repo path. |
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304 |
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305 An instance of the appropriate class is returned. |
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306 """ |
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307 if path == '00changelog.i': |
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308 return changelog.changelog(repo.svfs) |
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309 elif path.endswith('00manifest.i'): |
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310 mandir = path[:-len('00manifest.i')] |
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311 return manifest.manifestrevlog(repo.svfs, dir=mandir) |
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312 else: |
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313 # Filelogs don't do anything special with settings. So we can use a |
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314 # vanilla revlog. |
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315 return revlog.revlog(repo.svfs, path) |
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316 |
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317 def _copyrevlogs(ui, srcrepo, dstrepo, tr, deltareuse, aggressivemergedeltas): |
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318 """Copy revlogs between 2 repos.""" |
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319 revcount = 0 |
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320 srcsize = 0 |
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321 srcrawsize = 0 |
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322 dstsize = 0 |
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323 fcount = 0 |
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324 frevcount = 0 |
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325 fsrcsize = 0 |
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326 frawsize = 0 |
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327 fdstsize = 0 |
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328 mcount = 0 |
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329 mrevcount = 0 |
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330 msrcsize = 0 |
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331 mrawsize = 0 |
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332 mdstsize = 0 |
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333 crevcount = 0 |
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334 csrcsize = 0 |
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335 crawsize = 0 |
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336 cdstsize = 0 |
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337 |
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338 # Perform a pass to collect metadata. This validates we can open all |
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339 # source files and allows a unified progress bar to be displayed. |
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340 for unencoded, encoded, size in srcrepo.store.walk(): |
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341 if unencoded.endswith('.d'): |
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342 continue |
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343 |
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344 rl = _revlogfrompath(srcrepo, unencoded) |
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345 revcount += len(rl) |
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346 |
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347 datasize = 0 |
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348 rawsize = 0 |
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349 idx = rl.index |
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350 for rev in rl: |
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351 e = idx[rev] |
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352 datasize += e[1] |
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353 rawsize += e[2] |
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354 |
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355 srcsize += datasize |
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356 srcrawsize += rawsize |
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357 |
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358 # This is for the separate progress bars. |
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359 if isinstance(rl, changelog.changelog): |
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360 crevcount += len(rl) |
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361 csrcsize += datasize |
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362 crawsize += rawsize |
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363 elif isinstance(rl, manifest.manifestrevlog): |
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364 mcount += 1 |
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365 mrevcount += len(rl) |
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366 msrcsize += datasize |
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367 mrawsize += rawsize |
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368 elif isinstance(rl, revlog.revlog): |
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369 fcount += 1 |
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370 frevcount += len(rl) |
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371 fsrcsize += datasize |
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372 frawsize += rawsize |
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373 |
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374 if not revcount: |
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375 return |
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376 |
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377 ui.write(_('migrating %d total revisions (%d in filelogs, %d in manifests, ' |
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378 '%d in changelog)\n') % |
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379 (revcount, frevcount, mrevcount, crevcount)) |
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380 ui.write(_('migrating %s in store; %s tracked data\n') % ( |
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381 (util.bytecount(srcsize), util.bytecount(srcrawsize)))) |
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382 |
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383 # Used to keep track of progress. |
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384 progress = [] |
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385 def oncopiedrevision(rl, rev, node): |
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386 progress[1] += 1 |
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387 srcrepo.ui.progress(progress[0], progress[1], total=progress[2]) |
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388 |
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389 # Do the actual copying. |
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390 # FUTURE this operation can be farmed off to worker processes. |
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391 seen = set() |
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392 for unencoded, encoded, size in srcrepo.store.walk(): |
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393 if unencoded.endswith('.d'): |
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394 continue |
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395 |
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396 oldrl = _revlogfrompath(srcrepo, unencoded) |
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397 newrl = _revlogfrompath(dstrepo, unencoded) |
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398 |
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399 if isinstance(oldrl, changelog.changelog) and 'c' not in seen: |
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400 ui.write(_('finished migrating %d manifest revisions across %d ' |
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401 'manifests; change in size: %s\n') % |
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402 (mrevcount, mcount, util.bytecount(mdstsize - msrcsize))) |
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403 |
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404 ui.write(_('migrating changelog containing %d revisions ' |
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405 '(%s in store; %s tracked data)\n') % |
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406 (crevcount, util.bytecount(csrcsize), |
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407 util.bytecount(crawsize))) |
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408 seen.add('c') |
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409 progress[:] = [_('changelog revisions'), 0, crevcount] |
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410 elif isinstance(oldrl, manifest.manifestrevlog) and 'm' not in seen: |
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411 ui.write(_('finished migrating %d filelog revisions across %d ' |
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412 'filelogs; change in size: %s\n') % |
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413 (frevcount, fcount, util.bytecount(fdstsize - fsrcsize))) |
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414 |
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415 ui.write(_('migrating %d manifests containing %d revisions ' |
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416 '(%s in store; %s tracked data)\n') % |
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417 (mcount, mrevcount, util.bytecount(msrcsize), |
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418 util.bytecount(mrawsize))) |
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419 seen.add('m') |
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420 progress[:] = [_('manifest revisions'), 0, mrevcount] |
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421 elif 'f' not in seen: |
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422 ui.write(_('migrating %d filelogs containing %d revisions ' |
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423 '(%s in store; %s tracked data)\n') % |
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424 (fcount, frevcount, util.bytecount(fsrcsize), |
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425 util.bytecount(frawsize))) |
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426 seen.add('f') |
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427 progress[:] = [_('file revisions'), 0, frevcount] |
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428 |
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429 ui.progress(progress[0], progress[1], total=progress[2]) |
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430 |
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431 ui.note(_('cloning %d revisions from %s\n') % (len(oldrl), unencoded)) |
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432 oldrl.clone(tr, newrl, addrevisioncb=oncopiedrevision, |
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433 deltareuse=deltareuse, |
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434 aggressivemergedeltas=aggressivemergedeltas) |
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435 |
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436 datasize = 0 |
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437 idx = newrl.index |
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438 for rev in newrl: |
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439 datasize += idx[rev][1] |
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440 |
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441 dstsize += datasize |
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442 |
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443 if isinstance(newrl, changelog.changelog): |
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444 cdstsize += datasize |
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445 elif isinstance(newrl, manifest.manifestrevlog): |
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446 mdstsize += datasize |
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447 else: |
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448 fdstsize += datasize |
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449 |
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450 ui.progress(progress[0], None) |
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451 |
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452 ui.write(_('finished migrating %d changelog revisions; change in size: ' |
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453 '%s\n') % (crevcount, util.bytecount(cdstsize - csrcsize))) |
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454 |
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455 ui.write(_('finished migrating %d total revisions; total change in store ' |
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456 'size: %s\n') % (revcount, util.bytecount(dstsize - srcsize))) |
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457 |
31873
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458 def _filterstorefile(srcrepo, dstrepo, requirements, path, mode, st): |
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459 """Determine whether to copy a store file during upgrade. |
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460 |
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461 This function is called when migrating store files from ``srcrepo`` to |
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462 ``dstrepo`` as part of upgrading a repository. |
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463 |
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464 Args: |
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465 srcrepo: repo we are copying from |
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466 dstrepo: repo we are copying to |
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467 requirements: set of requirements for ``dstrepo`` |
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468 path: store file being examined |
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469 mode: the ``ST_MODE`` file type of ``path`` |
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470 st: ``stat`` data structure for ``path`` |
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471 |
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472 Function should return ``True`` if the file is to be copied. |
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473 """ |
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474 # Skip revlogs. |
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475 if path.endswith(('.i', '.d')): |
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476 return False |
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477 # Skip transaction related files. |
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478 if path.startswith('undo'): |
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479 return False |
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480 # Only copy regular files. |
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481 if mode != stat.S_IFREG: |
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482 return False |
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483 # Skip other skipped files. |
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484 if path in ('lock', 'fncache'): |
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485 return False |
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486 |
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487 return True |
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488 |
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489 def _finishdatamigration(ui, srcrepo, dstrepo, requirements): |
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490 """Hook point for extensions to perform additional actions during upgrade. |
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491 |
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492 This function is called after revlogs and store files have been copied but |
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493 before the new store is swapped into the original location. |
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494 """ |
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495 |
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496 def _upgraderepo(ui, srcrepo, dstrepo, requirements, actions): |
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497 """Do the low-level work of upgrading a repository. |
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498 |
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499 The upgrade is effectively performed as a copy between a source |
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500 repository and a temporary destination repository. |
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501 |
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502 The source repository is unmodified for as long as possible so the |
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503 upgrade can abort at any time without causing loss of service for |
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504 readers and without corrupting the source repository. |
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505 """ |
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506 assert srcrepo.currentwlock() |
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507 assert dstrepo.currentwlock() |
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508 |
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509 ui.write(_('(it is safe to interrupt this process any time before ' |
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510 'data migration completes)\n')) |
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511 |
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512 if 'redeltaall' in actions: |
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513 deltareuse = revlog.revlog.DELTAREUSENEVER |
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514 elif 'redeltaparent' in actions: |
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515 deltareuse = revlog.revlog.DELTAREUSESAMEREVS |
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516 elif 'redeltamultibase' in actions: |
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517 deltareuse = revlog.revlog.DELTAREUSESAMEREVS |
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518 else: |
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519 deltareuse = revlog.revlog.DELTAREUSEALWAYS |
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520 |
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521 with dstrepo.transaction('upgrade') as tr: |
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522 _copyrevlogs(ui, srcrepo, dstrepo, tr, deltareuse, |
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523 'redeltamultibase' in actions) |
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524 |
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525 # Now copy other files in the store directory. |
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526 # The sorted() makes execution deterministic. |
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527 for p, kind, st in sorted(srcrepo.store.vfs.readdir('', stat=True)): |
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528 if not _filterstorefile(srcrepo, dstrepo, requirements, |
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529 p, kind, st): |
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530 continue |
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531 |
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532 srcrepo.ui.write(_('copying %s\n') % p) |
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533 src = srcrepo.store.rawvfs.join(p) |
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534 dst = dstrepo.store.rawvfs.join(p) |
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535 util.copyfile(src, dst, copystat=True) |
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536 |
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537 _finishdatamigration(ui, srcrepo, dstrepo, requirements) |
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538 |
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539 ui.write(_('data fully migrated to temporary repository\n')) |
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540 |
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541 backuppath = tempfile.mkdtemp(prefix='upgradebackup.', dir=srcrepo.path) |
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542 backupvfs = vfsmod.vfs(backuppath) |
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543 |
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544 # Make a backup of requires file first, as it is the first to be modified. |
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545 util.copyfile(srcrepo.vfs.join('requires'), backupvfs.join('requires')) |
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546 |
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547 # We install an arbitrary requirement that clients must not support |
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548 # as a mechanism to lock out new clients during the data swap. This is |
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549 # better than allowing a client to continue while the repository is in |
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550 # an inconsistent state. |
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551 ui.write(_('marking source repository as being upgraded; clients will be ' |
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552 'unable to read from repository\n')) |
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553 scmutil.writerequires(srcrepo.vfs, |
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554 srcrepo.requirements | set(['upgradeinprogress'])) |
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555 |
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556 ui.write(_('starting in-place swap of repository data\n')) |
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557 ui.write(_('replaced files will be backed up at %s\n') % |
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558 backuppath) |
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|
559 |
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|
560 # Now swap in the new store directory. Doing it as a rename should make |
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561 # the operation nearly instantaneous and atomic (at least in well-behaved |
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562 # environments). |
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563 ui.write(_('replacing store...\n')) |
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564 tstart = util.timer() |
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565 util.rename(srcrepo.spath, backupvfs.join('store')) |
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566 util.rename(dstrepo.spath, srcrepo.spath) |
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567 elapsed = util.timer() - tstart |
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568 ui.write(_('store replacement complete; repository was inconsistent for ' |
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569 '%0.1fs\n') % elapsed) |
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570 |
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|
571 # We first write the requirements file. Any new requirements will lock |
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572 # out legacy clients. |
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573 ui.write(_('finalizing requirements file and making repository readable ' |
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574 'again\n')) |
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575 scmutil.writerequires(srcrepo.vfs, requirements) |
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576 |
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577 # The lock file from the old store won't be removed because nothing has a |
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578 # reference to its new location. So clean it up manually. Alternatively, we |
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579 # could update srcrepo.svfs and other variables to point to the new |
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580 # location. This is simpler. |
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581 backupvfs.unlink('store/lock') |
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582 |
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583 return backuppath |
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584 |
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585 def upgraderepo(ui, repo, run=False, optimize=None): |
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586 """Upgrade a repository in place.""" |
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587 optimize = set(optimize or []) |
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588 repo = repo.unfiltered() |
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|
589 |
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changeset
|
590 # Ensure the repository can be upgraded. |
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591 missingreqs = requiredsourcerequirements(repo) - repo.requirements |
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592 if missingreqs: |
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593 raise error.Abort(_('cannot upgrade repository; requirement ' |
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594 'missing: %s') % _(', ').join(sorted(missingreqs))) |
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595 |
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596 blockedreqs = blocksourcerequirements(repo) & repo.requirements |
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597 if blockedreqs: |
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598 raise error.Abort(_('cannot upgrade repository; unsupported source ' |
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599 'requirement: %s') % |
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600 _(', ').join(sorted(blockedreqs))) |
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601 |
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602 # FUTURE there is potentially a need to control the wanted requirements via |
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603 # command arguments or via an extension hook point. |
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604 newreqs = localrepo.newreporequirements(repo) |
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605 |
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606 noremovereqs = (repo.requirements - newreqs - |
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607 supportremovedrequirements(repo)) |
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608 if noremovereqs: |
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609 raise error.Abort(_('cannot upgrade repository; requirement would be ' |
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610 'removed: %s') % _(', ').join(sorted(noremovereqs))) |
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611 |
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612 noaddreqs = (newreqs - repo.requirements - |
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613 allowednewrequirements(repo)) |
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614 if noaddreqs: |
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615 raise error.Abort(_('cannot upgrade repository; do not support adding ' |
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616 'requirement: %s') % |
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617 _(', ').join(sorted(noaddreqs))) |
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618 |
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619 unsupportedreqs = newreqs - supporteddestrequirements(repo) |
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620 if unsupportedreqs: |
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621 raise error.Abort(_('cannot upgrade repository; do not support ' |
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622 'destination requirement: %s') % |
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623 _(', ').join(sorted(unsupportedreqs))) |
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624 |
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625 # Find and validate all improvements that can be made. |
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626 alloptimizations = findoptimizations(repo) |
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627 |
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628 # Apply and Validate arguments. |
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629 optimizations = [] |
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630 for o in alloptimizations: |
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631 if o.name in optimize: |
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632 optimizations.append(o) |
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633 optimize.discard(o.name) |
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634 |
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635 if optimize: # anything left is unknown |
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636 raise error.Abort(_('unknown optimization action requested: %s') % |
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637 ', '.join(sorted(optimize)), |
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638 hint=_('run without arguments to see valid ' |
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639 'optimizations')) |
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640 |
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641 deficiencies = finddeficiencies(repo) |
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642 actions = determineactions(repo, deficiencies, repo.requirements, newreqs) |
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643 actions.extend(o for o in sorted(optimizations) |
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644 # determineactions could have added optimisation |
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645 if o not in actions) |
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646 |
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647 def printrequirements(): |
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648 ui.write(_('requirements\n')) |
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649 ui.write(_(' preserved: %s\n') % |
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650 _(', ').join(sorted(newreqs & repo.requirements))) |
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651 |
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652 if repo.requirements - newreqs: |
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653 ui.write(_(' removed: %s\n') % |
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654 _(', ').join(sorted(repo.requirements - newreqs))) |
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655 |
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656 if newreqs - repo.requirements: |
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657 ui.write(_(' added: %s\n') % |
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658 _(', ').join(sorted(newreqs - repo.requirements))) |
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659 |
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660 ui.write('\n') |
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661 |
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662 def printupgradeactions(): |
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663 for a in actions: |
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664 ui.write('%s\n %s\n\n' % (a.name, a.upgrademessage)) |
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665 |
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666 if not run: |
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667 fromconfig = [] |
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668 onlydefault = [] |
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669 |
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670 for d in deficiencies: |
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671 if d.fromconfig: |
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672 fromconfig.append(d) |
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673 elif d.fromdefault: |
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674 onlydefault.append(d) |
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675 |
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676 if fromconfig or onlydefault: |
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677 |
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678 if fromconfig: |
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679 ui.write(_('repository lacks features recommended by ' |
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680 'current config options:\n\n')) |
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681 for i in fromconfig: |
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682 ui.write('%s\n %s\n\n' % (i.name, i.description)) |
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683 |
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684 if onlydefault: |
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685 ui.write(_('repository lacks features used by the default ' |
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686 'config options:\n\n')) |
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687 for i in onlydefault: |
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688 ui.write('%s\n %s\n\n' % (i.name, i.description)) |
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689 |
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690 ui.write('\n') |
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691 else: |
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692 ui.write(_('(no feature deficiencies found in existing ' |
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693 'repository)\n')) |
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|
694 |
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695 ui.write(_('performing an upgrade with "--run" will make the following ' |
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696 'changes:\n\n')) |
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697 |
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698 printrequirements() |
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699 printupgradeactions() |
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700 |
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701 unusedoptimize = [i for i in alloptimizations if i not in actions] |
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702 |
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|
703 if unusedoptimize: |
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704 ui.write(_('additional optimizations are available by specifying ' |
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705 '"--optimize <name>":\n\n')) |
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706 for i in unusedoptimize: |
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707 ui.write(_('%s\n %s\n\n') % (i.name, i.description)) |
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708 return |
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709 |
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710 # Else we're in the run=true case. |
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711 ui.write(_('upgrade will perform the following actions:\n\n')) |
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712 printrequirements() |
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713 printupgradeactions() |
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714 |
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715 upgradeactions = [a.name for a in actions] |
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716 |
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717 ui.write(_('beginning upgrade...\n')) |
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718 with repo.wlock(): |
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719 with repo.lock(): |
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720 ui.write(_('repository locked and read-only\n')) |
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721 # Our strategy for upgrading the repository is to create a new, |
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722 # temporary repository, write data to it, then do a swap of the |
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723 # data. There are less heavyweight ways to do this, but it is easier |
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724 # to create a new repo object than to instantiate all the components |
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725 # (like the store) separately. |
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726 tmppath = tempfile.mkdtemp(prefix='upgrade.', dir=repo.path) |
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727 backuppath = None |
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728 try: |
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729 ui.write(_('creating temporary repository to stage migrated ' |
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730 'data: %s\n') % tmppath) |
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731 dstrepo = localrepo.localrepository(repo.baseui, |
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732 path=tmppath, |
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733 create=True) |
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734 |
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735 with dstrepo.wlock(): |
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736 with dstrepo.lock(): |
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737 backuppath = _upgraderepo(ui, repo, dstrepo, newreqs, |
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738 upgradeactions) |
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739 |
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740 finally: |
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741 ui.write(_('removing temporary repository %s\n') % tmppath) |
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742 repo.vfs.rmtree(tmppath, forcibly=True) |
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743 |
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744 if backuppath: |
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745 ui.warn(_('copy of old repository backed up at %s\n') % |
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746 backuppath) |
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747 ui.warn(_('the old repository will not be deleted; remove ' |
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748 'it to free up disk space once the upgraded ' |
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749 'repository is verified\n')) |