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annotate hgext3rd/evolve/exthelper.py @ 2464:2b53a2a21bbb stable

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deprecation: fix cmdutil.command deprecation warning
author Boris Feld <boris.feld@octobus.net>
date Mon, 22 May 2017 14:57:47 +0200
parents d31ad31e456b
children 9efedcedd9dd
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1 #####################################################################
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2 ### Extension helper ###
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3 #####################################################################
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4
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5 from mercurial import (
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6 commands,
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7 extensions,
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8 registrar,
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9 revset,
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10 templatekw,
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11 util,
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12 )
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13
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14 if util.safehasattr(registrar, 'command'):
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15 command = registrar.command
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16 else: # compat with hg < 4.3
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17 from mercurial import cmdutil
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18 command = cmdutil.command
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19
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20 class exthelper(object):
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21 """Helper for modular extension setup
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22
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23 A single helper should be instantiated for each extension. Helper
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24 methods are then used as decorators for various purpose.
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25
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26 All decorators return the original function and may be chained.
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27 """
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28
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29 def __init__(self):
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30 self._uicallables = []
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31 self._extcallables = []
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32 self._repocallables = []
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33 self._revsetsymbols = []
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34 self._templatekws = []
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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 = command(self.cmdtable)
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41
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42 def merge(self, other):
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43 self._uicallables.extend(other._uicallables)
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44 self._extcallables.extend(other._extcallables)
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45 self._repocallables.extend(other._repocallables)
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46 self._revsetsymbols.extend(other._revsetsymbols)
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47 self._templatekws.extend(other._templatekws)
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48 self._commandwrappers.extend(other._commandwrappers)
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49 self._extcommandwrappers.extend(other._extcommandwrappers)
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50 self._functionwrappers.extend(other._functionwrappers)
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51 self._duckpunchers.extend(other._duckpunchers)
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52 self.cmdtable.update(other.cmdtable)
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53
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54 def final_uisetup(self, ui):
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55 """Method to be used as the extension uisetup
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56
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57 The following operations belong here:
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58
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59 - Changes to ui.__class__ . The ui object that will be used to run the
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60 command has not yet been created. Changes made here will affect ui
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61 objects created after this, and in particular the ui that will be
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62 passed to runcommand
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63 - Command wraps (extensions.wrapcommand)
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64 - Changes that need to be visible to other extensions: because
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65 initialization occurs in phases (all extensions run uisetup, then all
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66 run extsetup), a change made here will be visible to other extensions
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67 during extsetup
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68 - Monkeypatch or wrap function (extensions.wrapfunction) of dispatch
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69 module members
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70 - Setup of pre-* and post-* hooks
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71 - pushkey setup
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72 """
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73 for cont, funcname, func in self._duckpunchers:
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74 setattr(cont, funcname, func)
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75 for command, wrapper, opts in self._commandwrappers:
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76 entry = extensions.wrapcommand(commands.table, command, wrapper)
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77 if opts:
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78 for short, long, val, msg in opts:
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79 entry[1].append((short, long, val, msg))
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80 for cont, funcname, wrapper in self._functionwrappers:
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81 extensions.wrapfunction(cont, funcname, wrapper)
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82 for c in self._uicallables:
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83 c(ui)
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84
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85 def final_extsetup(self, ui):
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86 """Method to be used as a the extension extsetup
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87
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88 The following operations belong here:
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89
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90 - Changes depending on the status of other extensions. (if
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91 extensions.find('mq'))
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92 - Add a global option to all commands
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93 - Register revset functions
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94 """
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95 knownexts = {}
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96 for name, symbol in self._revsetsymbols:
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97 revset.symbols[name] = symbol
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98 for name, kw in self._templatekws:
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99 templatekw.keywords[name] = kw
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100 for ext, command, wrapper, opts in self._extcommandwrappers:
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101 if ext not in knownexts:
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102 try:
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103 e = extensions.find(ext)
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104 except KeyError:
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105 # Extension isn't enabled, so don't bother trying to wrap
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106 # it.
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107 continue
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108 knownexts[ext] = e.cmdtable
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109 entry = extensions.wrapcommand(knownexts[ext], command, wrapper)
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110 if opts:
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111 for short, long, val, msg in opts:
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112 entry[1].append((short, long, val, msg))
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113
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114 for c in self._extcallables:
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115 c(ui)
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116
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117 def final_reposetup(self, ui, repo):
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118 """Method to be used as the extension reposetup
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119
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120 The following operations belong here:
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121
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122 - All hooks but pre-* and post-*
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123 - Modify configuration variables
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124 - Changes to repo.__class__, repo.dirstate.__class__
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125 """
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126 for c in self._repocallables:
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127 c(ui, repo)
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128
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129 def uisetup(self, call):
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130 """Decorated function will be executed during uisetup
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131
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132 example::
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133
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134 @eh.uisetup
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135 def setupbabar(ui):
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136 print 'this is uisetup!'
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137 """
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138 self._uicallables.append(call)
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139 return call
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140
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141 def extsetup(self, call):
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142 """Decorated function will be executed during extsetup
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143
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144 example::
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145
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146 @eh.extsetup
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147 def setupcelestine(ui):
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148 print 'this is extsetup!'
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149 """
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150 self._extcallables.append(call)
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151 return call
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152
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153 def reposetup(self, call):
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154 """Decorated function will be executed during reposetup
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155
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156 example::
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157
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158 @eh.reposetup
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159 def setupzephir(ui, repo):
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160 print 'this is reposetup!'
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161 """
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162 self._repocallables.append(call)
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163 return call
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164
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165 def revset(self, symbolname):
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166 """Decorated function is a revset symbol
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167
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168 The name of the symbol must be given as the decorator argument.
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169 The symbol is added during `extsetup`.
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170
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171 example::
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172
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173 @eh.revset('hidden')
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174 def revsetbabar(repo, subset, x):
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175 args = revset.getargs(x, 0, 0, 'babar accept no argument')
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176 return [r for r in subset if 'babar' in repo[r].description()]
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177 """
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178 def dec(symbol):
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179 self._revsetsymbols.append((symbolname, symbol))
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180 return symbol
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181 return dec
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182
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183 def templatekw(self, keywordname):
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184 """Decorated function is a template keyword
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185
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186 The name of the keyword must be given as the decorator argument.
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187 The symbol is added during `extsetup`.
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188
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189 example::
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190
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191 @eh.templatekw('babar')
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192 def kwbabar(ctx):
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193 return 'babar'
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194 """
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195 def dec(keyword):
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196 self._templatekws.append((keywordname, keyword))
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197 return keyword
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198 return dec
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199
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200 def wrapcommand(self, command, extension=None, opts=[]):
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201 """Decorated function is a command wrapper
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202
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203 The name of the command must be given as the decorator argument.
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204 The wrapping is installed during `uisetup`.
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205
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206 If the second option `extension` argument is provided, the wrapping
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207 will be applied in the extension commandtable. This argument must be a
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208 string that will be searched using `extension.find` if not found and
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209 Abort error is raised. If the wrapping applies to an extension, it is
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210 installed during `extsetup`.
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211
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212 example::
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213
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214 @eh.wrapcommand('summary')
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215 def wrapsummary(orig, ui, repo, *args, **kwargs):
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216 ui.note('Barry!')
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217 return orig(ui, repo, *args, **kwargs)
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218
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219 The `opts` argument allows specifying additional arguments for the
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220 command.
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221
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222 """
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223 def dec(wrapper):
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224 if extension is None:
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225 self._commandwrappers.append((command, wrapper, opts))
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226 else:
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227 self._extcommandwrappers.append((extension, command, wrapper,
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228 opts))
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229 return wrapper
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230 return dec
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231
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232 def wrapfunction(self, container, funcname):
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233 """Decorated function is a function wrapper
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234
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235 This function takes two arguments, the container and the name of the
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236 function to wrap. The wrapping is performed during `uisetup`.
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237 (there is no extension support)
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238
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239 example::
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240
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241 @eh.function(discovery, 'checkheads')
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242 def wrapfunction(orig, *args, **kwargs):
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243 ui.note('His head smashed in and his heart cut out')
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244 return orig(*args, **kwargs)
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245 """
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246 def dec(wrapper):
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247 self._functionwrappers.append((container, funcname, wrapper))
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248 return wrapper
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249 return dec
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250
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251 def addattr(self, container, funcname):
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252 """Decorated function is to be added to the container
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253
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254 This function takes two arguments, the container and the name of the
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255 function to wrap. The wrapping is performed during `uisetup`.
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256
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257 example::
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258
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259 @eh.function(context.changectx, 'babar')
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260 def babar(ctx):
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261 return 'babar' in ctx.description
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262 """
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263 def dec(func):
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264 self._duckpunchers.append((container, funcname, func))
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265 return func
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266 return dec