Mercurial > hg
annotate mercurial/exthelper.py @ 41615:328ca3b9e545
branchmap: encapsulate cache updating in the map itself
Rather than have a repository update the cache, move handling of cache updates
into the branchmap module, in the form of a custom mapping class.
This makes later performance improvements easier to handle too.
Differential Revision: https://phab.mercurial-scm.org/D5638
author | Martijn Pieters <mj@octobus.net> |
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date | Mon, 21 Jan 2019 17:37:33 +0000 |
parents | c9e1104e6272 |
children | c07dcf7a0247 |
rev | line source |
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1 # Copyright 2012 Logilab SA <contact@logilab.fr> |
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2 # Pierre-Yves David <pierre-yves.david@ens-lyon.org> |
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3 # Octobus <contact@octobus.net> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
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6 # GNU General Public License version 2 or any later version. |
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7 |
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8 ##################################################################### |
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9 ### Extension helper ### |
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10 ##################################################################### |
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11 |
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12 from __future__ import absolute_import |
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13 |
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14 from . import ( |
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15 commands, |
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16 error, |
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17 extensions, |
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18 registrar, |
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19 ) |
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20 |
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21 class exthelper(object): |
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22 """Helper for modular extension setup |
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23 |
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24 A single helper should be instantiated for each module of an |
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25 extension, where a command or function needs to be wrapped, or a |
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26 command, extension hook, fileset, revset or template needs to be |
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27 registered. Helper methods are then used as decorators for |
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28 these various purposes. If an extension spans multiple modules, |
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29 all helper instances should be merged in the main module. |
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30 |
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31 All decorators return the original function and may be chained. |
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32 |
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33 Aside from the helper functions with examples below, several |
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34 registrar method aliases are available for adding commands, |
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35 configitems, filesets, revsets, and templates. Simply decorate |
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36 the appropriate methods, and assign the corresponding exthelper |
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37 variable to a module level variable of the extension. The |
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38 extension loading mechanism will handle the rest. |
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39 |
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40 example:: |
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41 |
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42 # ext.py |
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43 eh = exthelper.exthelper() |
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44 |
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45 # As needed: |
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46 cmdtable = eh.cmdtable |
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47 configtable = eh.configtable |
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48 filesetpredicate = eh.filesetpredicate |
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49 revsetpredicate = eh.revsetpredicate |
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50 templatekeyword = eh.templatekeyword |
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51 |
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52 @eh.command('mynewcommand', |
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53 [('r', 'rev', [], _('operate on these revisions'))], |
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54 _('-r REV...'), |
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55 helpcategory=command.CATEGORY_XXX) |
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56 def newcommand(ui, repo, *revs, **opts): |
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57 # implementation goes here |
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58 |
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59 eh.configitem('experimental', 'foo', |
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60 default=False, |
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61 ) |
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62 |
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63 @eh.filesetpredicate('lfs()') |
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64 def filesetbabar(mctx, x): |
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65 return mctx.predicate(...) |
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66 |
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67 @eh.revsetpredicate('hidden') |
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68 def revsetbabar(repo, subset, x): |
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69 args = revset.getargs(x, 0, 0, 'babar accept no argument') |
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70 return [r for r in subset if 'babar' in repo[r].description()] |
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71 |
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72 @eh.templatekeyword('babar') |
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73 def kwbabar(ctx): |
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74 return 'babar' |
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75 """ |
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76 |
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77 def __init__(self): |
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78 self._uipopulatecallables = [] |
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79 self._uicallables = [] |
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80 self._extcallables = [] |
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81 self._repocallables = [] |
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82 self._commandwrappers = [] |
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83 self._extcommandwrappers = [] |
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84 self._functionwrappers = [] |
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85 self.cmdtable = {} |
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86 self.command = registrar.command(self.cmdtable) |
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87 self.configtable = {} |
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88 self.configitem = registrar.configitem(self.configtable) |
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89 self.filesetpredicate = registrar.filesetpredicate() |
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90 self.revsetpredicate = registrar.revsetpredicate() |
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91 self.templatekeyword = registrar.templatekeyword() |
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92 |
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93 def merge(self, other): |
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94 self._uicallables.extend(other._uicallables) |
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95 self._uipopulatecallables.extend(other._uipopulatecallables) |
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96 self._extcallables.extend(other._extcallables) |
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97 self._repocallables.extend(other._repocallables) |
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98 self.filesetpredicate._merge(other.filesetpredicate) |
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99 self.revsetpredicate._merge(other.revsetpredicate) |
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100 self.templatekeyword._merge(other.templatekeyword) |
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101 self._commandwrappers.extend(other._commandwrappers) |
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102 self._extcommandwrappers.extend(other._extcommandwrappers) |
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103 self._functionwrappers.extend(other._functionwrappers) |
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104 self.cmdtable.update(other.cmdtable) |
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105 for section, items in other.configtable.iteritems(): |
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106 if section in self.configtable: |
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107 self.configtable[section].update(items) |
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108 else: |
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109 self.configtable[section] = items |
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110 |
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111 def finaluisetup(self, ui): |
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112 """Method to be used as the extension uisetup |
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113 |
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114 The following operations belong here: |
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115 |
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116 - Changes to ui.__class__ . The ui object that will be used to run the |
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117 command has not yet been created. Changes made here will affect ui |
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118 objects created after this, and in particular the ui that will be |
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119 passed to runcommand |
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120 - Command wraps (extensions.wrapcommand) |
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121 - Changes that need to be visible to other extensions: because |
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122 initialization occurs in phases (all extensions run uisetup, then all |
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123 run extsetup), a change made here will be visible to other extensions |
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124 during extsetup |
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125 - Monkeypatch or wrap function (extensions.wrapfunction) of dispatch |
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126 module members |
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127 - Setup of pre-* and post-* hooks |
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128 - pushkey setup |
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129 """ |
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130 for command, wrapper, opts in self._commandwrappers: |
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131 entry = extensions.wrapcommand(commands.table, command, wrapper) |
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132 if opts: |
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133 for opt in opts: |
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134 entry[1].append(opt) |
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135 for cont, funcname, wrapper in self._functionwrappers: |
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136 extensions.wrapfunction(cont, funcname, wrapper) |
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137 for c in self._uicallables: |
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138 c(ui) |
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139 |
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140 def finaluipopulate(self, ui): |
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141 """Method to be used as the extension uipopulate |
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142 |
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143 This is called once per ui instance to: |
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144 |
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145 - Set up additional ui members |
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146 - Update configuration by ``ui.setconfig()`` |
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147 - Extend the class dynamically |
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148 """ |
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149 for c in self._uipopulatecallables: |
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150 c(ui) |
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151 |
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152 def finalextsetup(self, ui): |
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153 """Method to be used as a the extension extsetup |
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154 |
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155 The following operations belong here: |
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156 |
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157 - Changes depending on the status of other extensions. (if |
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158 extensions.find('mq')) |
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159 - Add a global option to all commands |
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160 """ |
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161 knownexts = {} |
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162 |
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163 for ext, command, wrapper, opts in self._extcommandwrappers: |
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164 if ext not in knownexts: |
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165 try: |
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166 e = extensions.find(ext) |
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167 except KeyError: |
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168 # Extension isn't enabled, so don't bother trying to wrap |
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169 # it. |
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170 continue |
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171 knownexts[ext] = e.cmdtable |
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172 entry = extensions.wrapcommand(knownexts[ext], command, wrapper) |
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173 if opts: |
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174 for opt in opts: |
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175 entry[1].append(opt) |
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176 |
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177 for c in self._extcallables: |
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178 c(ui) |
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179 |
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180 def finalreposetup(self, ui, repo): |
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181 """Method to be used as the extension reposetup |
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182 |
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183 The following operations belong here: |
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184 |
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185 - All hooks but pre-* and post-* |
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186 - Modify configuration variables |
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187 - Changes to repo.__class__, repo.dirstate.__class__ |
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188 """ |
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189 for c in self._repocallables: |
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190 c(ui, repo) |
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191 |
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192 def uisetup(self, call): |
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193 """Decorated function will be executed during uisetup |
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194 |
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195 example:: |
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196 |
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197 @eh.uisetup |
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198 def setupbabar(ui): |
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199 print 'this is uisetup!' |
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200 """ |
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201 self._uicallables.append(call) |
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202 return call |
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203 |
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204 def uipopulate(self, call): |
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205 """Decorated function will be executed during uipopulate |
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206 |
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207 example:: |
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208 |
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209 @eh.uipopulate |
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210 def setupfoo(ui): |
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211 print 'this is uipopulate!' |
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212 """ |
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213 self._uipopulatecallables.append(call) |
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214 return call |
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215 |
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216 def extsetup(self, call): |
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217 """Decorated function will be executed during extsetup |
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218 |
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219 example:: |
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220 |
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221 @eh.extsetup |
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222 def setupcelestine(ui): |
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223 print 'this is extsetup!' |
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224 """ |
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225 self._extcallables.append(call) |
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226 return call |
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227 |
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228 def reposetup(self, call): |
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229 """Decorated function will be executed during reposetup |
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230 |
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231 example:: |
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232 |
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233 @eh.reposetup |
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234 def setupzephir(ui, repo): |
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235 print 'this is reposetup!' |
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236 """ |
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237 self._repocallables.append(call) |
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238 return call |
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239 |
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240 def wrapcommand(self, command, extension=None, opts=None): |
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241 """Decorated function is a command wrapper |
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242 |
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243 The name of the command must be given as the decorator argument. |
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244 The wrapping is installed during `uisetup`. |
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245 |
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246 If the second option `extension` argument is provided, the wrapping |
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247 will be applied in the extension commandtable. This argument must be a |
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248 string that will be searched using `extension.find` if not found and |
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249 Abort error is raised. If the wrapping applies to an extension, it is |
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250 installed during `extsetup`. |
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251 |
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252 example:: |
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253 |
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254 @eh.wrapcommand('summary') |
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255 def wrapsummary(orig, ui, repo, *args, **kwargs): |
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256 ui.note('Barry!') |
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257 return orig(ui, repo, *args, **kwargs) |
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258 |
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259 The `opts` argument allows specifying a list of tuples for additional |
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260 arguments for the command. See ``mercurial.fancyopts.fancyopts()`` for |
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261 the format of the tuple. |
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262 |
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263 """ |
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264 if opts is None: |
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265 opts = [] |
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266 else: |
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267 for opt in opts: |
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268 if not isinstance(opt, tuple): |
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269 raise error.ProgrammingError('opts must be list of tuples') |
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270 if len(opt) not in (4, 5): |
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271 msg = 'each opt tuple must contain 4 or 5 values' |
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272 raise error.ProgrammingError(msg) |
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273 |
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274 def dec(wrapper): |
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275 if extension is None: |
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276 self._commandwrappers.append((command, wrapper, opts)) |
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277 else: |
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278 self._extcommandwrappers.append((extension, command, wrapper, |
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279 opts)) |
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280 return wrapper |
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281 return dec |
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282 |
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283 def wrapfunction(self, container, funcname): |
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284 """Decorated function is a function wrapper |
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285 |
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286 This function takes two arguments, the container and the name of the |
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287 function to wrap. The wrapping is performed during `uisetup`. |
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288 (there is no extension support) |
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289 |
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290 example:: |
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291 |
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292 @eh.function(discovery, 'checkheads') |
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293 def wrapfunction(orig, *args, **kwargs): |
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294 ui.note('His head smashed in and his heart cut out') |
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295 return orig(*args, **kwargs) |
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296 """ |
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297 def dec(wrapper): |
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298 self._functionwrappers.append((container, funcname, wrapper)) |
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299 return wrapper |
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300 return dec |