Mercurial > hg
annotate mercurial/upgrade.py @ 39559:07b58266bce3
wireprotov2: implement commands as a generator of objects
Previously, wire protocol version 2 inherited version 1's model of
having separate types to represent the results of different wire
protocol commands.
As I implemented more powerful commands in future commits, I found
I was using a common pattern of returning a special type to hold a
generator. This meant the command function required a closure to
do most of the work. That made logic flow more difficult to follow.
I also noticed that many commands were effectively a sequence of
objects to be CBOR encoded.
I think it makes sense to define version 2 commands as generators.
This way, commands can simply emit the data structures they wish to
send to the client. This eliminates the need for a closure in
command functions and removes encoding from the bodies of commands.
As part of this commit, the handling of response objects has been
moved into the serverreactor class. This puts the reactor in the
driver's seat with regards to CBOR encoding and error handling.
Having error handling in the function that emits frames is
particularly important because exceptions in that function can lead
to things getting in a bad state: I'm fairly certain that uncaught
exceptions in the frame generator were causing deadlocks.
I also introduced a dedicated error type for explicit error reporting
in command handlers. This will be used in subsequent commits.
There's still a bit of work to be done here, especially around
formalizing the error handling "protocol." I've added yet another
TODO to track this so we don't forget.
Test output changed because we're using generators and no longer know
we are at the end of the data until we hit the end of the generator.
This means we can't emit the end-of-stream flag until we've exhausted
the generator. Hence the introduction of 0-sized end-of-stream frames.
Differential Revision: https://phab.mercurial-scm.org/D4472
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Wed, 05 Sep 2018 09:06:40 -0700 |
parents | 41aa5dced975 |
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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 |
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12 from .i18n import _ |
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13 from . import ( |
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14 changelog, |
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15 error, |
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16 filelog, |
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17 hg, |
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18 localrepo, |
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19 manifest, |
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20 pycompat, |
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21 revlog, |
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22 scmutil, |
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23 util, |
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24 vfs as vfsmod, |
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25 ) |
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26 |
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27 def requiredsourcerequirements(repo): |
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28 """Obtain requirements required to be present to upgrade a repo. |
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29 |
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30 An upgrade will not be allowed if the repository doesn't have the |
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31 requirements returned by this function. |
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32 """ |
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33 return { |
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34 # Introduced in Mercurial 0.9.2. |
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35 'revlogv1', |
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36 # Introduced in Mercurial 0.9.2. |
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37 'store', |
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38 } |
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39 |
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40 def blocksourcerequirements(repo): |
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41 """Obtain requirements that will prevent an upgrade from occurring. |
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42 |
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43 An upgrade cannot be performed if the source repository contains a |
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44 requirements in the returned set. |
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45 """ |
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46 return { |
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47 # The upgrade code does not yet support these experimental features. |
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48 # This is an artificial limitation. |
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49 'treemanifest', |
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50 # This was a precursor to generaldelta and was never enabled by default. |
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51 # It should (hopefully) not exist in the wild. |
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52 'parentdelta', |
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53 # Upgrade should operate on the actual store, not the shared link. |
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54 'shared', |
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55 } |
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56 |
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57 def supportremovedrequirements(repo): |
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58 """Obtain requirements that can be removed during an upgrade. |
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59 |
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60 If an upgrade were to create a repository that dropped a requirement, |
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61 the dropped requirement must appear in the returned set for the upgrade |
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62 to be allowed. |
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63 """ |
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64 return { |
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65 localrepo.SPARSEREVLOG_REQUIREMENT, |
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66 } |
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67 |
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68 def supporteddestrequirements(repo): |
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69 """Obtain requirements that upgrade supports in the destination. |
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70 |
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71 If the result of the upgrade would create requirements not in this set, |
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72 the upgrade is disallowed. |
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73 |
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74 Extensions should monkeypatch this to add their custom requirements. |
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75 """ |
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76 return { |
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77 'dotencode', |
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78 'fncache', |
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79 'generaldelta', |
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80 'revlogv1', |
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81 'store', |
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82 localrepo.SPARSEREVLOG_REQUIREMENT, |
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83 } |
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84 |
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85 def allowednewrequirements(repo): |
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86 """Obtain requirements that can be added to a repository during upgrade. |
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87 |
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88 This is used to disallow proposed requirements from being added when |
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89 they weren't present before. |
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90 |
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91 We use a list of allowed requirement additions instead of a list of known |
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92 bad additions because the whitelist approach is safer and will prevent |
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93 future, unknown requirements from accidentally being added. |
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94 """ |
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95 return { |
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96 'dotencode', |
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97 'fncache', |
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98 'generaldelta', |
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99 localrepo.SPARSEREVLOG_REQUIREMENT, |
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100 } |
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101 |
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102 def preservedrequirements(repo): |
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103 return set() |
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104 |
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105 deficiency = 'deficiency' |
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106 optimisation = 'optimization' |
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107 |
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108 class improvement(object): |
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109 """Represents an improvement that can be made as part of an upgrade. |
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110 |
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111 The following attributes are defined on each instance: |
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112 |
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113 name |
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114 Machine-readable string uniquely identifying this improvement. It |
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115 will be mapped to an action later in the upgrade process. |
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116 |
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117 type |
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118 Either ``deficiency`` or ``optimisation``. A deficiency is an obvious |
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119 problem. An optimization is an action (sometimes optional) that |
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120 can be taken to further improve the state of the repository. |
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121 |
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122 description |
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123 Message intended for humans explaining the improvement in more detail, |
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124 including the implications of it. For ``deficiency`` types, should be |
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125 worded in the present tense. For ``optimisation`` types, should be |
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126 worded in the future tense. |
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127 |
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128 upgrademessage |
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129 Message intended for humans explaining what an upgrade addressing this |
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130 issue will do. Should be worded in the future tense. |
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131 """ |
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132 def __init__(self, name, type, description, upgrademessage): |
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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 def __eq__(self, other): |
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139 if not isinstance(other, improvement): |
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140 # This is what python tell use to do |
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141 return NotImplemented |
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142 return self.name == other.name |
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143 |
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144 def __ne__(self, other): |
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145 return not self == other |
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146 |
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147 def __hash__(self): |
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148 return hash(self.name) |
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149 |
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150 allformatvariant = [] |
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151 |
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152 def registerformatvariant(cls): |
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153 allformatvariant.append(cls) |
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154 return cls |
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155 |
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156 class formatvariant(improvement): |
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157 """an improvement subclass dedicated to repository format""" |
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158 type = deficiency |
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159 ### The following attributes should be defined for each class: |
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160 |
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161 # machine-readable string uniquely identifying this improvement. it will be |
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162 # mapped to an action later in the upgrade process. |
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163 name = None |
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164 |
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165 # message intended for humans explaining the improvement in more detail, |
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166 # including the implications of it ``deficiency`` types, should be worded |
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167 # in the present tense. |
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168 description = None |
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169 |
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170 # message intended for humans explaining what an upgrade addressing this |
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171 # issue will do. should be worded in the future tense. |
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172 upgrademessage = None |
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173 |
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174 # value of current Mercurial default for new repository |
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175 default = None |
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176 |
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177 def __init__(self): |
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178 raise NotImplementedError() |
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179 |
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180 @staticmethod |
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181 def fromrepo(repo): |
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182 """current value of the variant in the repository""" |
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183 raise NotImplementedError() |
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184 |
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185 @staticmethod |
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186 def fromconfig(repo): |
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187 """current value of the variant in the configuration""" |
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188 raise NotImplementedError() |
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189 |
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190 class requirementformatvariant(formatvariant): |
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191 """formatvariant based on a 'requirement' name. |
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192 |
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193 Many format variant are controlled by a 'requirement'. We define a small |
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194 subclass to factor the code. |
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195 """ |
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196 |
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197 # the requirement that control this format variant |
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198 _requirement = None |
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199 |
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200 @staticmethod |
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201 def _newreporequirements(ui): |
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202 return localrepo.newreporequirements(ui) |
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203 |
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204 @classmethod |
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205 def fromrepo(cls, repo): |
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206 assert cls._requirement is not None |
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207 return cls._requirement in repo.requirements |
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208 |
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209 @classmethod |
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210 def fromconfig(cls, repo): |
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211 assert cls._requirement is not None |
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212 return cls._requirement in cls._newreporequirements(repo.ui) |
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213 |
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214 @registerformatvariant |
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215 class fncache(requirementformatvariant): |
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216 name = 'fncache' |
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217 |
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218 _requirement = 'fncache' |
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219 |
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220 default = True |
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221 |
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222 description = _('long and reserved filenames may not work correctly; ' |
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223 'repository performance is sub-optimal') |
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224 |
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225 upgrademessage = _('repository will be more resilient to storing ' |
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226 'certain paths and performance of certain ' |
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227 'operations should be improved') |
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228 |
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229 @registerformatvariant |
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230 class dotencode(requirementformatvariant): |
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231 name = 'dotencode' |
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232 |
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233 _requirement = 'dotencode' |
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234 |
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235 default = True |
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236 |
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237 description = _('storage of filenames beginning with a period or ' |
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238 'space may not work correctly') |
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239 |
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240 upgrademessage = _('repository will be better able to store files ' |
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241 'beginning with a space or period') |
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242 |
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243 @registerformatvariant |
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244 class generaldelta(requirementformatvariant): |
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245 name = 'generaldelta' |
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246 |
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247 _requirement = 'generaldelta' |
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248 |
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249 default = True |
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250 |
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251 description = _('deltas within internal storage are unable to ' |
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252 'choose optimal revisions; repository is larger and ' |
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253 'slower than it could be; interaction with other ' |
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254 'repositories may require extra network and CPU ' |
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255 'resources, making "hg push" and "hg pull" slower') |
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256 |
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257 upgrademessage = _('repository storage will be able to create ' |
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258 'optimal deltas; new repository data will be ' |
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259 'smaller and read times should decrease; ' |
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260 'interacting with other repositories using this ' |
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261 'storage model should require less network and ' |
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262 'CPU resources, making "hg push" and "hg pull" ' |
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263 'faster') |
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264 |
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265 @registerformatvariant |
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266 class sparserevlog(requirementformatvariant): |
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267 name = 'sparserevlog' |
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268 |
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269 _requirement = localrepo.SPARSEREVLOG_REQUIREMENT |
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270 |
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271 default = False |
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272 |
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273 description = _('in order to limit disk reading and memory usage on older ' |
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274 'version, the span of a delta chain from its root to its ' |
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275 'end is limited, whatever the relevant data in this span. ' |
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276 'This can severly limit Mercurial ability to build good ' |
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277 'chain of delta resulting is much more storage space being ' |
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278 'taken and limit reusability of on disk delta during ' |
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279 'exchange.' |
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280 ) |
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281 |
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282 upgrademessage = _('Revlog supports delta chain with more unused data ' |
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283 'between payload. These gaps will be skipped at read ' |
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284 'time. This allows for better delta chains, making a ' |
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285 'better compression and faster exchange with server.') |
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286 |
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287 @registerformatvariant |
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288 class removecldeltachain(formatvariant): |
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289 name = 'plain-cl-delta' |
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290 |
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291 default = True |
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292 |
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293 description = _('changelog storage is using deltas instead of ' |
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294 'raw entries; changelog reading and any ' |
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295 'operation relying on changelog data are slower ' |
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296 'than they could be') |
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297 |
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298 upgrademessage = _('changelog storage will be reformated to ' |
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299 'store raw entries; changelog reading will be ' |
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300 'faster; changelog size may be reduced') |
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301 |
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302 @staticmethod |
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303 def fromrepo(repo): |
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304 # Mercurial 4.0 changed changelogs to not use delta chains. Search for |
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305 # changelogs with deltas. |
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306 cl = repo.changelog |
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307 chainbase = cl.chainbase |
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308 return all(rev == chainbase(rev) for rev in cl) |
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309 |
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310 @staticmethod |
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311 def fromconfig(repo): |
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312 return True |
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313 |
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314 @registerformatvariant |
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315 class compressionengine(formatvariant): |
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316 name = 'compression' |
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317 default = 'zlib' |
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318 |
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319 description = _('Compresion algorithm used to compress data. ' |
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320 'Some engine are faster than other') |
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321 |
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322 upgrademessage = _('revlog content will be recompressed with the new ' |
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323 'algorithm.') |
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324 |
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325 @classmethod |
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326 def fromrepo(cls, repo): |
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327 for req in repo.requirements: |
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328 if req.startswith('exp-compression-'): |
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329 return req.split('-', 2)[2] |
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330 return 'zlib' |
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331 |
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332 @classmethod |
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333 def fromconfig(cls, repo): |
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334 return repo.ui.config('experimental', 'format.compression') |
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335 |
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336 def finddeficiencies(repo): |
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337 """returns a list of deficiencies that the repo suffer from""" |
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338 deficiencies = [] |
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339 |
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340 # We could detect lack of revlogv1 and store here, but they were added |
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341 # in 0.9.2 and we don't support upgrading repos without these |
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342 # requirements, so let's not bother. |
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343 |
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344 for fv in allformatvariant: |
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345 if not fv.fromrepo(repo): |
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346 deficiencies.append(fv) |
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347 |
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348 return deficiencies |
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349 |
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350 def findoptimizations(repo): |
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351 """Determine optimisation that could be used during upgrade""" |
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352 # These are unconditionally added. There is logic later that figures out |
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353 # which ones to apply. |
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354 optimizations = [] |
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355 |
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356 optimizations.append(improvement( |
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357 name='redeltaparent', |
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358 type=optimisation, |
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359 description=_('deltas within internal storage will be recalculated to ' |
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360 'choose an optimal base revision where this was not ' |
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361 'already done; the size of the repository may shrink and ' |
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362 'various operations may become faster; the first time ' |
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363 'this optimization is performed could slow down upgrade ' |
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364 'execution considerably; subsequent invocations should ' |
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365 'not run noticeably slower'), |
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366 upgrademessage=_('deltas within internal storage will choose a new ' |
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367 'base revision if needed'))) |
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368 |
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369 optimizations.append(improvement( |
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370 name='redeltamultibase', |
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371 type=optimisation, |
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372 description=_('deltas within internal storage will be recalculated ' |
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373 'against multiple base revision and the smallest ' |
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374 'difference will be used; the size of the repository may ' |
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375 'shrink significantly when there are many merges; this ' |
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376 'optimization will slow down execution in proportion to ' |
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377 'the number of merges in the repository and the amount ' |
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378 'of files in the repository; this slow down should not ' |
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379 'be significant unless there are tens of thousands of ' |
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380 'files and thousands of merges'), |
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381 upgrademessage=_('deltas within internal storage will choose an ' |
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382 'optimal delta by computing deltas against multiple ' |
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383 'parents; may slow down execution time ' |
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384 'significantly'))) |
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385 |
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386 optimizations.append(improvement( |
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387 name='redeltaall', |
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388 type=optimisation, |
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389 description=_('deltas within internal storage will always be ' |
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390 'recalculated without reusing prior deltas; this will ' |
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391 'likely make execution run several times slower; this ' |
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392 'optimization is typically not needed'), |
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393 upgrademessage=_('deltas within internal storage will be fully ' |
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394 'recomputed; this will likely drastically slow down ' |
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395 'execution time'))) |
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396 |
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397 optimizations.append(improvement( |
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398 name='redeltafulladd', |
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399 type=optimisation, |
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400 description=_('every revision will be re-added as if it was new ' |
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401 'content. It will go through the full storage ' |
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402 'mechanism giving extensions a chance to process it ' |
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403 '(eg. lfs). This is similar to "redeltaall" but even ' |
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404 'slower since more logic is involved.'), |
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405 upgrademessage=_('each revision will be added as new content to the ' |
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406 'internal storage; this will likely drastically slow ' |
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407 'down execution time, but some extensions might need ' |
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408 'it'))) |
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409 |
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410 return optimizations |
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411 |
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412 def determineactions(repo, deficiencies, sourcereqs, destreqs): |
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413 """Determine upgrade actions that will be performed. |
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414 |
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415 Given a list of improvements as returned by ``finddeficiencies`` and |
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416 ``findoptimizations``, determine the list of upgrade actions that |
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417 will be performed. |
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418 |
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419 The role of this function is to filter improvements if needed, apply |
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420 recommended optimizations from the improvements list that make sense, |
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421 etc. |
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422 |
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423 Returns a list of action names. |
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424 """ |
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425 newactions = [] |
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426 |
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427 knownreqs = supporteddestrequirements(repo) |
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428 |
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429 for d in deficiencies: |
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430 name = d.name |
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431 |
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432 # If the action is a requirement that doesn't show up in the |
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433 # destination requirements, prune the action. |
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434 if name in knownreqs and name not in destreqs: |
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435 continue |
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436 |
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437 newactions.append(d) |
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438 |
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439 # FUTURE consider adding some optimizations here for certain transitions. |
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440 # e.g. adding generaldelta could schedule parent redeltas. |
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441 |
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442 return newactions |
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443 |
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444 def _revlogfrompath(repo, path): |
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445 """Obtain a revlog from a repo path. |
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446 |
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447 An instance of the appropriate class is returned. |
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448 """ |
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449 if path == '00changelog.i': |
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450 return changelog.changelog(repo.svfs) |
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451 elif path.endswith('00manifest.i'): |
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452 mandir = path[:-len('00manifest.i')] |
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453 return manifest.manifestrevlog(repo.svfs, tree=mandir) |
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454 else: |
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455 #reverse of "/".join(("data", path + ".i")) |
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456 return filelog.filelog(repo.svfs, path[5:-2]) |
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|
457 |
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458 def _copyrevlogs(ui, srcrepo, dstrepo, tr, deltareuse, deltabothparents): |
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459 """Copy revlogs between 2 repos.""" |
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460 revcount = 0 |
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461 srcsize = 0 |
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462 srcrawsize = 0 |
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463 dstsize = 0 |
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464 fcount = 0 |
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465 frevcount = 0 |
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466 fsrcsize = 0 |
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467 frawsize = 0 |
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468 fdstsize = 0 |
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469 mcount = 0 |
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470 mrevcount = 0 |
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471 msrcsize = 0 |
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472 mrawsize = 0 |
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473 mdstsize = 0 |
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474 crevcount = 0 |
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|
475 csrcsize = 0 |
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|
476 crawsize = 0 |
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|
477 cdstsize = 0 |
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|
478 |
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479 # Perform a pass to collect metadata. This validates we can open all |
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480 # source files and allows a unified progress bar to be displayed. |
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|
481 for unencoded, encoded, size in srcrepo.store.walk(): |
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482 if unencoded.endswith('.d'): |
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483 continue |
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|
484 |
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485 rl = _revlogfrompath(srcrepo, unencoded) |
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486 revcount += len(rl) |
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|
487 |
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488 datasize = 0 |
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489 rawsize = 0 |
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|
490 idx = rl.index |
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|
491 for rev in rl: |
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492 e = idx[rev] |
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493 datasize += e[1] |
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|
494 rawsize += e[2] |
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changeset
|
495 |
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|
496 srcsize += datasize |
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|
497 srcrawsize += rawsize |
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|
498 |
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changeset
|
499 # This is for the separate progress bars. |
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500 if isinstance(rl, changelog.changelog): |
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|
501 crevcount += len(rl) |
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|
502 csrcsize += datasize |
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|
503 crawsize += rawsize |
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|
504 elif isinstance(rl, manifest.manifestrevlog): |
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|
505 mcount += 1 |
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|
506 mrevcount += len(rl) |
38aa1ca97b6a
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|
507 msrcsize += datasize |
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|
508 mrawsize += rawsize |
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|
509 elif isinstance(rl, filelog.filelog): |
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|
510 fcount += 1 |
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|
511 frevcount += len(rl) |
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|
512 fsrcsize += datasize |
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|
513 frawsize += rawsize |
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upgrade: sniff for filelog type
Gregory Szorc <gregory.szorc@gmail.com>
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|
514 else: |
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|
515 error.ProgrammingError('unknown revlog type') |
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|
516 |
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changeset
|
517 if not revcount: |
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diff
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|
518 return |
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parents:
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diff
changeset
|
519 |
38aa1ca97b6a
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diff
changeset
|
520 ui.write(_('migrating %d total revisions (%d in filelogs, %d in manifests, ' |
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diff
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|
521 '%d in changelog)\n') % |
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Gregory Szorc <gregory.szorc@gmail.com>
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|
522 (revcount, frevcount, mrevcount, crevcount)) |
38aa1ca97b6a
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|
523 ui.write(_('migrating %s in store; %s tracked data\n') % ( |
38aa1ca97b6a
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diff
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|
524 (util.bytecount(srcsize), util.bytecount(srcrawsize)))) |
38aa1ca97b6a
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parents:
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diff
changeset
|
525 |
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parents:
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diff
changeset
|
526 # Used to keep track of progress. |
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|
527 progress = None |
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|
528 def oncopiedrevision(rl, rev, node): |
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|
529 progress.increment() |
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diff
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|
530 |
38aa1ca97b6a
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diff
changeset
|
531 # Do the actual copying. |
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changeset
|
532 # FUTURE this operation can be farmed off to worker processes. |
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|
533 seen = set() |
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parents:
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|
534 for unencoded, encoded, size in srcrepo.store.walk(): |
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parents:
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diff
changeset
|
535 if unencoded.endswith('.d'): |
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parents:
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diff
changeset
|
536 continue |
38aa1ca97b6a
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
537 |
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parents:
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diff
changeset
|
538 oldrl = _revlogfrompath(srcrepo, unencoded) |
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diff
changeset
|
539 newrl = _revlogfrompath(dstrepo, unencoded) |
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parents:
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diff
changeset
|
540 |
38aa1ca97b6a
repair: migrate revlogs during upgrade
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
541 if isinstance(oldrl, changelog.changelog) and 'c' not in seen: |
38aa1ca97b6a
repair: migrate revlogs during upgrade
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parents:
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diff
changeset
|
542 ui.write(_('finished migrating %d manifest revisions across %d ' |
38aa1ca97b6a
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parents:
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diff
changeset
|
543 'manifests; change in size: %s\n') % |
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repair: migrate revlogs during upgrade
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parents:
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diff
changeset
|
544 (mrevcount, mcount, util.bytecount(mdstsize - msrcsize))) |
38aa1ca97b6a
repair: migrate revlogs during upgrade
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
545 |
38aa1ca97b6a
repair: migrate revlogs during upgrade
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
546 ui.write(_('migrating changelog containing %d revisions ' |
38aa1ca97b6a
repair: migrate revlogs during upgrade
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
547 '(%s in store; %s tracked data)\n') % |
38aa1ca97b6a
repair: migrate revlogs during upgrade
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
548 (crevcount, util.bytecount(csrcsize), |
38aa1ca97b6a
repair: migrate revlogs during upgrade
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
549 util.bytecount(crawsize))) |
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repair: migrate revlogs during upgrade
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
550 seen.add('c') |
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upgrade: use progress helper
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diff
changeset
|
551 progress = srcrepo.ui.makeprogress(_('changelog revisions'), |
185588cb0c4b
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diff
changeset
|
552 total=crevcount) |
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38aa1ca97b6a
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parents:
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diff
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|
553 elif isinstance(oldrl, manifest.manifestrevlog) and 'm' not in seen: |
38aa1ca97b6a
repair: migrate revlogs during upgrade
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
554 ui.write(_('finished migrating %d filelog revisions across %d ' |
38aa1ca97b6a
repair: migrate revlogs during upgrade
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
555 'filelogs; change in size: %s\n') % |
38aa1ca97b6a
repair: migrate revlogs during upgrade
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
556 (frevcount, fcount, util.bytecount(fdstsize - fsrcsize))) |
38aa1ca97b6a
repair: migrate revlogs during upgrade
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30777
diff
changeset
|
557 |
38aa1ca97b6a
repair: migrate revlogs during upgrade
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parents:
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diff
changeset
|
558 ui.write(_('migrating %d manifests containing %d revisions ' |
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repair: migrate revlogs during upgrade
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
559 '(%s in store; %s tracked data)\n') % |
38aa1ca97b6a
repair: migrate revlogs during upgrade
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
560 (mcount, mrevcount, util.bytecount(msrcsize), |
38aa1ca97b6a
repair: migrate revlogs during upgrade
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
561 util.bytecount(mrawsize))) |
38aa1ca97b6a
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parents:
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diff
changeset
|
562 seen.add('m') |
38398
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upgrade: close progress after each revlog
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parents:
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diff
changeset
|
563 if progress: |
38399
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parents:
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diff
changeset
|
564 progress.complete() |
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parents:
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diff
changeset
|
565 progress = srcrepo.ui.makeprogress(_('manifest revisions'), |
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upgrade: use progress helper
Martin von Zweigbergk <martinvonz@google.com>
parents:
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diff
changeset
|
566 total=mrevcount) |
30779
38aa1ca97b6a
repair: migrate revlogs during upgrade
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
567 elif 'f' not in seen: |
38aa1ca97b6a
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parents:
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diff
changeset
|
568 ui.write(_('migrating %d filelogs containing %d revisions ' |
38aa1ca97b6a
repair: migrate revlogs during upgrade
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parents:
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diff
changeset
|
569 '(%s in store; %s tracked data)\n') % |
38aa1ca97b6a
repair: migrate revlogs during upgrade
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
570 (fcount, frevcount, util.bytecount(fsrcsize), |
38aa1ca97b6a
repair: migrate revlogs during upgrade
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
571 util.bytecount(frawsize))) |
38aa1ca97b6a
repair: migrate revlogs during upgrade
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
572 seen.add('f') |
38398
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upgrade: close progress after each revlog
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38165
diff
changeset
|
573 if progress: |
38399
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parents:
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diff
changeset
|
574 progress.complete() |
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parents:
38398
diff
changeset
|
575 progress = srcrepo.ui.makeprogress(_('file revisions'), |
185588cb0c4b
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Martin von Zweigbergk <martinvonz@google.com>
parents:
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diff
changeset
|
576 total=frevcount) |
30779
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repair: migrate revlogs during upgrade
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
577 |
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578 |
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579 ui.note(_('cloning %d revisions from %s\n') % (len(oldrl), unencoded)) |
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580 oldrl.clone(tr, newrl, addrevisioncb=oncopiedrevision, |
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581 deltareuse=deltareuse, |
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|
582 deltabothparents=deltabothparents) |
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583 |
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584 datasize = 0 |
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parents:
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585 idx = newrl.index |
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parents:
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586 for rev in newrl: |
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587 datasize += idx[rev][1] |
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588 |
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589 dstsize += datasize |
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590 |
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591 if isinstance(newrl, changelog.changelog): |
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592 cdstsize += datasize |
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593 elif isinstance(newrl, manifest.manifestrevlog): |
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diff
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|
594 mdstsize += datasize |
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parents:
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595 else: |
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596 fdstsize += datasize |
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597 |
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598 progress.complete() |
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599 |
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|
600 ui.write(_('finished migrating %d changelog revisions; change in size: ' |
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601 '%s\n') % (crevcount, util.bytecount(cdstsize - csrcsize))) |
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parents:
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diff
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602 |
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parents:
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diff
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603 ui.write(_('finished migrating %d total revisions; total change in store ' |
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604 'size: %s\n') % (revcount, util.bytecount(dstsize - srcsize))) |
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diff
changeset
|
605 |
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606 def _filterstorefile(srcrepo, dstrepo, requirements, path, mode, st): |
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607 """Determine whether to copy a store file during upgrade. |
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|
608 |
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diff
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|
609 This function is called when migrating store files from ``srcrepo`` to |
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parents:
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diff
changeset
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610 ``dstrepo`` as part of upgrading a repository. |
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611 |
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612 Args: |
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613 srcrepo: repo we are copying from |
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614 dstrepo: repo we are copying to |
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615 requirements: set of requirements for ``dstrepo`` |
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616 path: store file being examined |
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617 mode: the ``ST_MODE`` file type of ``path`` |
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618 st: ``stat`` data structure for ``path`` |
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619 |
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620 Function should return ``True`` if the file is to be copied. |
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621 """ |
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622 # Skip revlogs. |
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623 if path.endswith(('.i', '.d')): |
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624 return False |
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625 # Skip transaction related files. |
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626 if path.startswith('undo'): |
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627 return False |
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628 # Only copy regular files. |
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629 if mode != stat.S_IFREG: |
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630 return False |
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631 # Skip other skipped files. |
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632 if path in ('lock', 'fncache'): |
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633 return False |
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|
634 |
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635 return True |
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|
636 |
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637 def _finishdatamigration(ui, srcrepo, dstrepo, requirements): |
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|
638 """Hook point for extensions to perform additional actions during upgrade. |
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|
639 |
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|
640 This function is called after revlogs and store files have been copied but |
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|
641 before the new store is swapped into the original location. |
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|
642 """ |
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|
643 |
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644 def _upgraderepo(ui, srcrepo, dstrepo, requirements, actions): |
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645 """Do the low-level work of upgrading a repository. |
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|
646 |
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647 The upgrade is effectively performed as a copy between a source |
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|
648 repository and a temporary destination repository. |
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|
649 |
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|
650 The source repository is unmodified for as long as possible so the |
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|
651 upgrade can abort at any time without causing loss of service for |
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652 readers and without corrupting the source repository. |
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|
653 """ |
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|
654 assert srcrepo.currentwlock() |
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655 assert dstrepo.currentwlock() |
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|
656 |
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|
657 ui.write(_('(it is safe to interrupt this process any time before ' |
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|
658 'data migration completes)\n')) |
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|
659 |
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|
660 if 'redeltaall' in actions: |
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|
661 deltareuse = revlog.revlog.DELTAREUSENEVER |
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662 elif 'redeltaparent' in actions: |
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|
663 deltareuse = revlog.revlog.DELTAREUSESAMEREVS |
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|
664 elif 'redeltamultibase' in actions: |
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|
665 deltareuse = revlog.revlog.DELTAREUSESAMEREVS |
35598
29248ea26b29
upgraderepo: select correct deltareuse depending on actions
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|
666 elif 'redeltafulladd' in actions: |
35345
6226668a7169
upgrade: add a 'redeltafullall' mode
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diff
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|
667 deltareuse = revlog.revlog.DELTAREUSEFULLADD |
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668 else: |
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|
669 deltareuse = revlog.revlog.DELTAREUSEALWAYS |
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|
670 |
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671 with dstrepo.transaction('upgrade') as tr: |
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|
672 _copyrevlogs(ui, srcrepo, dstrepo, tr, deltareuse, |
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|
673 'redeltamultibase' in actions) |
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|
674 |
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|
675 # Now copy other files in the store directory. |
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|
676 # The sorted() makes execution deterministic. |
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|
677 for p, kind, st in sorted(srcrepo.store.vfs.readdir('', stat=True)): |
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|
678 if not _filterstorefile(srcrepo, dstrepo, requirements, |
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|
679 p, kind, st): |
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|
680 continue |
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|
681 |
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|
682 srcrepo.ui.write(_('copying %s\n') % p) |
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|
683 src = srcrepo.store.rawvfs.join(p) |
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684 dst = dstrepo.store.rawvfs.join(p) |
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|
685 util.copyfile(src, dst, copystat=True) |
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686 |
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|
687 _finishdatamigration(ui, srcrepo, dstrepo, requirements) |
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688 |
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|
689 ui.write(_('data fully migrated to temporary repository\n')) |
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|
690 |
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2ce60954b1b7
py3: wrap tempfile.mkdtemp() to use bytes path
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|
691 backuppath = pycompat.mkdtemp(prefix='upgradebackup.', dir=srcrepo.path) |
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692 backupvfs = vfsmod.vfs(backuppath) |
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693 |
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694 # Make a backup of requires file first, as it is the first to be modified. |
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695 util.copyfile(srcrepo.vfs.join('requires'), backupvfs.join('requires')) |
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696 |
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697 # We install an arbitrary requirement that clients must not support |
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698 # as a mechanism to lock out new clients during the data swap. This is |
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699 # better than allowing a client to continue while the repository is in |
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700 # an inconsistent state. |
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701 ui.write(_('marking source repository as being upgraded; clients will be ' |
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parents:
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diff
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|
702 'unable to read from repository\n')) |
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703 scmutil.writerequires(srcrepo.vfs, |
32291
bd872f64a8ba
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|
704 srcrepo.requirements | {'upgradeinprogress'}) |
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705 |
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|
706 ui.write(_('starting in-place swap of repository data\n')) |
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707 ui.write(_('replaced files will be backed up at %s\n') % |
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diff
changeset
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708 backuppath) |
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diff
changeset
|
709 |
30779
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Gregory Szorc <gregory.szorc@gmail.com>
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diff
changeset
|
710 # Now swap in the new store directory. Doing it as a rename should make |
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parents:
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711 # the operation nearly instantaneous and atomic (at least in well-behaved |
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712 # environments). |
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713 ui.write(_('replacing store...\n')) |
30975
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diff
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|
714 tstart = util.timer() |
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715 util.rename(srcrepo.spath, backupvfs.join('store')) |
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716 util.rename(dstrepo.spath, srcrepo.spath) |
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717 elapsed = util.timer() - tstart |
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718 ui.write(_('store replacement complete; repository was inconsistent for ' |
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719 '%0.1fs\n') % elapsed) |
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720 |
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721 # We first write the requirements file. Any new requirements will lock |
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722 # out legacy clients. |
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|
723 ui.write(_('finalizing requirements file and making repository readable ' |
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724 'again\n')) |
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725 scmutil.writerequires(srcrepo.vfs, requirements) |
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726 |
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diff
changeset
|
727 # The lock file from the old store won't be removed because nothing has a |
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diff
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|
728 # reference to its new location. So clean it up manually. Alternatively, we |
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729 # could update srcrepo.svfs and other variables to point to the new |
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730 # location. This is simpler. |
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changeset
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731 backupvfs.unlink('store/lock') |
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diff
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732 |
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733 return backuppath |
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734 |
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735 def upgraderepo(ui, repo, run=False, optimize=None): |
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736 """Upgrade a repository in place.""" |
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737 optimize = set(optimize or []) |
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738 repo = repo.unfiltered() |
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739 |
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740 # Ensure the repository can be upgraded. |
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741 missingreqs = requiredsourcerequirements(repo) - repo.requirements |
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742 if missingreqs: |
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|
743 raise error.Abort(_('cannot upgrade repository; requirement ' |
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744 'missing: %s') % _(', ').join(sorted(missingreqs))) |
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|
745 |
31866
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diff
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|
746 blockedreqs = blocksourcerequirements(repo) & repo.requirements |
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747 if blockedreqs: |
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748 raise error.Abort(_('cannot upgrade repository; unsupported source ' |
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749 'requirement: %s') % |
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750 _(', ').join(sorted(blockedreqs))) |
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|
751 |
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752 # FUTURE there is potentially a need to control the wanted requirements via |
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diff
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|
753 # command arguments or via an extension hook point. |
39546
41aa5dced975
localrepo: pass ui to newreporequirements() (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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754 newreqs = localrepo.newreporequirements(repo.ui) |
35302
ad2b35ebf670
upgraderepo: allow extension to register preserved requirements
Boris Feld <boris.feld@octobus.net>
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|
755 newreqs.update(preservedrequirements(repo)) |
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|
756 |
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|
757 noremovereqs = (repo.requirements - newreqs - |
31867
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diff
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758 supportremovedrequirements(repo)) |
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759 if noremovereqs: |
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760 raise error.Abort(_('cannot upgrade repository; requirement would be ' |
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|
761 'removed: %s') % _(', ').join(sorted(noremovereqs))) |
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762 |
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diff
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|
763 noaddreqs = (newreqs - repo.requirements - |
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upgrade: drop the prefix to the 'allowednewrequirements' function
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diff
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|
764 allowednewrequirements(repo)) |
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765 if noaddreqs: |
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|
766 raise error.Abort(_('cannot upgrade repository; do not support adding ' |
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diff
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767 'requirement: %s') % |
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|
768 _(', ').join(sorted(noaddreqs))) |
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diff
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|
769 |
31870
49011f1cedd4
upgrade: drop the prefix to the 'supporteddestrequirements' function
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parents:
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diff
changeset
|
770 unsupportedreqs = newreqs - supporteddestrequirements(repo) |
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|
771 if unsupportedreqs: |
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|
772 raise error.Abort(_('cannot upgrade repository; do not support ' |
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parents:
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diff
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773 'destination requirement: %s') % |
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|
774 _(', ').join(sorted(unsupportedreqs))) |
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diff
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|
775 |
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changeset
|
776 # Find and validate all improvements that can be made. |
31899
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777 alloptimizations = findoptimizations(repo) |
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778 |
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|
779 # Apply and Validate arguments. |
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780 optimizations = [] |
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|
781 for o in alloptimizations: |
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|
782 if o.name in optimize: |
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|
783 optimizations.append(o) |
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784 optimize.discard(o.name) |
cccd8e1538b0
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785 |
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|
786 if optimize: # anything left is unknown |
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787 raise error.Abort(_('unknown optimization action requested: %s') % |
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788 ', '.join(sorted(optimize)), |
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789 hint=_('run without arguments to see valid ' |
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|
790 'optimizations')) |
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|
791 |
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|
792 deficiencies = finddeficiencies(repo) |
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changeset
|
793 actions = determineactions(repo, deficiencies, repo.requirements, newreqs) |
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diff
changeset
|
794 actions.extend(o for o in sorted(optimizations) |
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changeset
|
795 # determineactions could have added optimisation |
31903
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diff
changeset
|
796 if o not in actions) |
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|
797 |
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798 def printrequirements(): |
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799 ui.write(_('requirements\n')) |
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|
800 ui.write(_(' preserved: %s\n') % |
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|
801 _(', ').join(sorted(newreqs & repo.requirements))) |
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802 |
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|
803 if repo.requirements - newreqs: |
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|
804 ui.write(_(' removed: %s\n') % |
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805 _(', ').join(sorted(repo.requirements - newreqs))) |
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806 |
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807 if newreqs - repo.requirements: |
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808 ui.write(_(' added: %s\n') % |
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809 _(', ').join(sorted(newreqs - repo.requirements))) |
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810 |
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811 ui.write('\n') |
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812 |
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813 def printupgradeactions(): |
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814 for a in actions: |
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815 ui.write('%s\n %s\n\n' % (a.name, a.upgrademessage)) |
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816 |
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817 if not run: |
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818 fromconfig = [] |
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819 onlydefault = [] |
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820 |
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821 for d in deficiencies: |
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822 if d.fromconfig(repo): |
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823 fromconfig.append(d) |
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824 elif d.default: |
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825 onlydefault.append(d) |
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826 |
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827 if fromconfig or onlydefault: |
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828 |
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829 if fromconfig: |
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830 ui.write(_('repository lacks features recommended by ' |
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831 'current config options:\n\n')) |
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832 for i in fromconfig: |
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833 ui.write('%s\n %s\n\n' % (i.name, i.description)) |
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834 |
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835 if onlydefault: |
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836 ui.write(_('repository lacks features used by the default ' |
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837 'config options:\n\n')) |
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838 for i in onlydefault: |
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839 ui.write('%s\n %s\n\n' % (i.name, i.description)) |
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840 |
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841 ui.write('\n') |
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842 else: |
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843 ui.write(_('(no feature deficiencies found in existing ' |
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844 'repository)\n')) |
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845 |
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846 ui.write(_('performing an upgrade with "--run" will make the following ' |
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847 'changes:\n\n')) |
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848 |
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849 printrequirements() |
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850 printupgradeactions() |
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851 |
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852 unusedoptimize = [i for i in alloptimizations if i not in actions] |
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853 |
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854 if unusedoptimize: |
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855 ui.write(_('additional optimizations are available by specifying ' |
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856 '"--optimize <name>":\n\n')) |
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857 for i in unusedoptimize: |
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858 ui.write(_('%s\n %s\n\n') % (i.name, i.description)) |
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859 return |
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860 |
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861 # Else we're in the run=true case. |
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862 ui.write(_('upgrade will perform the following actions:\n\n')) |
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863 printrequirements() |
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864 printupgradeactions() |
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865 |
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866 upgradeactions = [a.name for a in actions] |
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867 |
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868 ui.write(_('beginning upgrade...\n')) |
33438 | 869 with repo.wlock(), repo.lock(): |
870 ui.write(_('repository locked and read-only\n')) | |
871 # Our strategy for upgrading the repository is to create a new, | |
872 # temporary repository, write data to it, then do a swap of the | |
873 # data. There are less heavyweight ways to do this, but it is easier | |
874 # to create a new repo object than to instantiate all the components | |
875 # (like the store) separately. | |
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876 tmppath = pycompat.mkdtemp(prefix='upgrade.', dir=repo.path) |
33438 | 877 backuppath = None |
878 try: | |
879 ui.write(_('creating temporary repository to stage migrated ' | |
880 'data: %s\n') % tmppath) | |
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881 |
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882 # clone ui without using ui.copy because repo.ui is protected |
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883 repoui = repo.ui.__class__(repo.ui) |
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884 dstrepo = hg.repository(repoui, path=tmppath, create=True) |
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885 |
33438 | 886 with dstrepo.wlock(), dstrepo.lock(): |
887 backuppath = _upgraderepo(ui, repo, dstrepo, newreqs, | |
888 upgradeactions) | |
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889 |
33438 | 890 finally: |
891 ui.write(_('removing temporary repository %s\n') % tmppath) | |
892 repo.vfs.rmtree(tmppath, forcibly=True) | |
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893 |
33438 | 894 if backuppath: |
895 ui.warn(_('copy of old repository backed up at %s\n') % | |
896 backuppath) | |
897 ui.warn(_('the old repository will not be deleted; remove ' | |
898 'it to free up disk space once the upgraded ' | |
899 'repository is verified\n')) |