Mercurial > hg-stable
annotate mercurial/exthelper.py @ 41073:8f40e21ca842
exthelper: reintroduce the ability to register filesets
Same mechanism as revsets earlier in this series. The LFS extension is updated
to provide test coverage.
author | Matt Harbison <matt_harbison@yahoo.com> |
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date | Thu, 27 Dec 2018 23:46:35 -0500 |
parents | 70ca0e846d25 |
children | c81bb97b0cac |
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 extension. Helper |
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25 methods are then used as decorators for various purpose. |
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26 |
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27 All decorators return the original function and may be chained. |
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28 """ |
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29 |
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30 def __init__(self): |
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31 self._uipopulatecallables = [] |
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32 self._uicallables = [] |
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33 self._extcallables = [] |
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34 self._repocallables = [] |
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35 self._commandwrappers = [] |
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36 self._extcommandwrappers = [] |
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37 self._functionwrappers = [] |
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38 self._duckpunchers = [] |
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39 self.cmdtable = {} |
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40 self.command = registrar.command(self.cmdtable) |
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41 self.configtable = {} |
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42 self.configitem = registrar.configitem(self.configtable) |
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43 self.filesetpredicate = registrar.filesetpredicate() |
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44 self.revsetpredicate = registrar.revsetpredicate() |
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45 self.templatekeyword = registrar.templatekeyword() |
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46 |
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47 def merge(self, other): |
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48 self._uicallables.extend(other._uicallables) |
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49 self._uipopulatecallables.extend(other._uipopulatecallables) |
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50 self._extcallables.extend(other._extcallables) |
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51 self._repocallables.extend(other._repocallables) |
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52 self.filesetpredicate._table.update(other.filesetpredicate._table) |
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53 self.revsetpredicate._table.update(other.revsetpredicate._table) |
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54 self.templatekeyword._table.update(other.templatekeyword._table) |
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55 self._commandwrappers.extend(other._commandwrappers) |
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56 self._extcommandwrappers.extend(other._extcommandwrappers) |
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57 self._functionwrappers.extend(other._functionwrappers) |
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58 self._duckpunchers.extend(other._duckpunchers) |
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59 self.cmdtable.update(other.cmdtable) |
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60 for section, items in other.configtable.iteritems(): |
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61 if section in self.configtable: |
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62 self.configtable[section].update(items) |
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63 else: |
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64 self.configtable[section] = items |
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65 |
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66 def finaluisetup(self, ui): |
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67 """Method to be used as the extension uisetup |
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68 |
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69 The following operations belong here: |
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70 |
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71 - Changes to ui.__class__ . The ui object that will be used to run the |
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72 command has not yet been created. Changes made here will affect ui |
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73 objects created after this, and in particular the ui that will be |
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74 passed to runcommand |
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75 - Command wraps (extensions.wrapcommand) |
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76 - Changes that need to be visible to other extensions: because |
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77 initialization occurs in phases (all extensions run uisetup, then all |
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78 run extsetup), a change made here will be visible to other extensions |
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79 during extsetup |
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80 - Monkeypatch or wrap function (extensions.wrapfunction) of dispatch |
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81 module members |
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82 - Setup of pre-* and post-* hooks |
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83 - pushkey setup |
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84 """ |
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85 for cont, funcname, func in self._duckpunchers: |
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86 setattr(cont, funcname, func) |
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87 for command, wrapper, opts in self._commandwrappers: |
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88 entry = extensions.wrapcommand(commands.table, command, wrapper) |
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89 if opts: |
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90 for opt in opts: |
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91 entry[1].append(opt) |
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92 for cont, funcname, wrapper in self._functionwrappers: |
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93 extensions.wrapfunction(cont, funcname, wrapper) |
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94 for c in self._uicallables: |
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95 c(ui) |
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96 |
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97 def finaluipopulate(self, ui): |
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98 """Method to be used as the extension uipopulate |
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99 |
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100 This is called once per ui instance to: |
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101 |
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102 - Set up additional ui members |
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103 - Update configuration by ``ui.setconfig()`` |
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104 - Extend the class dynamically |
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105 """ |
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106 for c in self._uipopulatecallables: |
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107 c(ui) |
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108 |
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109 def finalextsetup(self, ui): |
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110 """Method to be used as a the extension extsetup |
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111 |
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112 The following operations belong here: |
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113 |
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114 - Changes depending on the status of other extensions. (if |
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115 extensions.find('mq')) |
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116 - Add a global option to all commands |
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117 """ |
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118 knownexts = {} |
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119 |
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120 for ext, command, wrapper, opts in self._extcommandwrappers: |
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121 if ext not in knownexts: |
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122 try: |
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123 e = extensions.find(ext) |
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124 except KeyError: |
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125 # Extension isn't enabled, so don't bother trying to wrap |
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126 # it. |
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127 continue |
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128 knownexts[ext] = e.cmdtable |
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129 entry = extensions.wrapcommand(knownexts[ext], command, wrapper) |
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130 if opts: |
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131 for opt in opts: |
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132 entry[1].append(opt) |
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133 |
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134 for c in self._extcallables: |
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135 c(ui) |
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136 |
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137 def finalreposetup(self, ui, repo): |
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138 """Method to be used as the extension reposetup |
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139 |
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140 The following operations belong here: |
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141 |
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142 - All hooks but pre-* and post-* |
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143 - Modify configuration variables |
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144 - Changes to repo.__class__, repo.dirstate.__class__ |
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145 """ |
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146 for c in self._repocallables: |
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147 c(ui, repo) |
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148 |
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149 def uisetup(self, call): |
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150 """Decorated function will be executed during uisetup |
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151 |
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152 example:: |
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153 |
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154 @eh.uisetup |
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155 def setupbabar(ui): |
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156 print 'this is uisetup!' |
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157 """ |
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158 self._uicallables.append(call) |
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159 return call |
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160 |
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161 def uipopulate(self, call): |
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162 """Decorated function will be executed during uipopulate |
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163 |
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164 example:: |
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165 |
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166 @eh.uipopulate |
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167 def setupfoo(ui): |
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168 print 'this is uipopulate!' |
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169 """ |
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170 self._uipopulatecallables.append(call) |
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171 return call |
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172 |
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173 def extsetup(self, call): |
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174 """Decorated function will be executed during extsetup |
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175 |
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176 example:: |
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177 |
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178 @eh.extsetup |
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179 def setupcelestine(ui): |
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180 print 'this is extsetup!' |
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181 """ |
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182 self._extcallables.append(call) |
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183 return call |
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184 |
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185 def reposetup(self, call): |
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186 """Decorated function will be executed during reposetup |
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187 |
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188 example:: |
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189 |
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190 @eh.reposetup |
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191 def setupzephir(ui, repo): |
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192 print 'this is reposetup!' |
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193 """ |
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194 self._repocallables.append(call) |
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195 return call |
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196 |
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197 def wrapcommand(self, command, extension=None, opts=None): |
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198 """Decorated function is a command wrapper |
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199 |
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200 The name of the command must be given as the decorator argument. |
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201 The wrapping is installed during `uisetup`. |
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202 |
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203 If the second option `extension` argument is provided, the wrapping |
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204 will be applied in the extension commandtable. This argument must be a |
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205 string that will be searched using `extension.find` if not found and |
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206 Abort error is raised. If the wrapping applies to an extension, it is |
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207 installed during `extsetup`. |
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208 |
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209 example:: |
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210 |
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211 @eh.wrapcommand('summary') |
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212 def wrapsummary(orig, ui, repo, *args, **kwargs): |
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213 ui.note('Barry!') |
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214 return orig(ui, repo, *args, **kwargs) |
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215 |
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216 The `opts` argument allows specifying a list of tuples for additional |
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217 arguments for the command. See ``mercurial.fancyopts.fancyopts()`` for |
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218 the format of the tuple. |
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219 |
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220 """ |
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221 if opts is None: |
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222 opts = [] |
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223 else: |
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224 for opt in opts: |
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225 if not isinstance(opt, tuple): |
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226 raise error.ProgrammingError('opts must be list of tuples') |
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227 if len(opt) not in (4, 5): |
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228 msg = 'each opt tuple must contain 4 or 5 values' |
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229 raise error.ProgrammingError(msg) |
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230 |
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231 def dec(wrapper): |
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232 if extension is None: |
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233 self._commandwrappers.append((command, wrapper, opts)) |
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234 else: |
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235 self._extcommandwrappers.append((extension, command, wrapper, |
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236 opts)) |
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237 return wrapper |
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238 return dec |
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239 |
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240 def wrapfunction(self, container, funcname): |
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241 """Decorated function is a function wrapper |
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242 |
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243 This function takes two arguments, the container and the name of the |
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244 function to wrap. The wrapping is performed during `uisetup`. |
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245 (there is no extension support) |
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246 |
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247 example:: |
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248 |
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249 @eh.function(discovery, 'checkheads') |
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250 def wrapfunction(orig, *args, **kwargs): |
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251 ui.note('His head smashed in and his heart cut out') |
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252 return orig(*args, **kwargs) |
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253 """ |
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254 def dec(wrapper): |
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255 self._functionwrappers.append((container, funcname, wrapper)) |
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256 return wrapper |
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257 return dec |
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258 |
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259 def addattr(self, container, funcname): |
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260 """Decorated function is to be added to the container |
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261 |
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262 This function takes two arguments, the container and the name of the |
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263 function to wrap. The wrapping is performed during `uisetup`. |
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264 |
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265 Adding attributes to a container like this is discouraged, because the |
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266 container modification is visible even in repositories that do not |
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267 have the extension loaded. Therefore, care must be taken that the |
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268 function doesn't make assumptions that the extension was loaded for the |
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269 current repository. For `ui` and `repo` instances, a better option is |
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270 to subclass the instance in `uipopulate` and `reposetup` respectively. |
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271 |
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272 https://www.mercurial-scm.org/wiki/WritingExtensions |
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273 |
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274 example:: |
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275 |
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276 @eh.addattr(context.changectx, 'babar') |
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277 def babar(ctx): |
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278 return 'babar' in ctx.description |
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279 """ |
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280 def dec(func): |
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281 self._duckpunchers.append((container, funcname, func)) |
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282 return func |
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283 return dec |