Mercurial > evolve

annotate hgext3rd/evolve/exthelper.py @ 2925:9efedcedd9dd

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evolve: use registrar.revsetpredicate to register revset predicate functions Now, using registrar.revsetpredicate of Mercurial directly in evolve extension should be safe enough. because it has been available since Mercurial 3.8, and minimum Mercurial version for evolve extension is 3.8, too.
author FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
date Sun, 10 Sep 2017 20:06:52 +0900
parents 2b53a2a21bbb
children 1abafae41fe2
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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
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97 revsetpredicate = registrar.revsetpredicate()
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98 for name, symbol in self._revsetsymbols:
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99 revsetpredicate(name)(symbol)
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100 revset.loadpredicate(ui, 'evolve', revsetpredicate)
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101
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102 for name, kw in self._templatekws:
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103 templatekw.keywords[name] = kw
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104 for ext, command, wrapper, opts in self._extcommandwrappers:
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105 if ext not in knownexts:
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106 try:
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107 e = extensions.find(ext)
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108 except KeyError:
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109 # Extension isn't enabled, so don't bother trying to wrap
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110 # it.
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111 continue
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112 knownexts[ext] = e.cmdtable
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113 entry = extensions.wrapcommand(knownexts[ext], command, wrapper)
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114 if opts:
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115 for short, long, val, msg in opts:
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116 entry[1].append((short, long, val, msg))
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117
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118 for c in self._extcallables:
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119 c(ui)
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120
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121 def final_reposetup(self, ui, repo):
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122 """Method to be used as the extension reposetup
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123
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124 The following operations belong here:
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125
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126 - All hooks but pre-* and post-*
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127 - Modify configuration variables
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128 - Changes to repo.__class__, repo.dirstate.__class__
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129 """
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130 for c in self._repocallables:
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131 c(ui, repo)
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132
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133 def uisetup(self, call):
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134 """Decorated function will be executed during uisetup
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135
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136 example::
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137
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138 @eh.uisetup
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139 def setupbabar(ui):
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140 print 'this is uisetup!'
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141 """
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142 self._uicallables.append(call)
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143 return call
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144
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145 def extsetup(self, call):
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146 """Decorated function will be executed during extsetup
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147
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148 example::
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149
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150 @eh.extsetup
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151 def setupcelestine(ui):
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152 print 'this is extsetup!'
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153 """
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154 self._extcallables.append(call)
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155 return call
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156
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157 def reposetup(self, call):
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158 """Decorated function will be executed during reposetup
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159
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160 example::
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161
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162 @eh.reposetup
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163 def setupzephir(ui, repo):
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164 print 'this is reposetup!'
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165 """
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166 self._repocallables.append(call)
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167 return call
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168
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169 def revset(self, symbolname):
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170 """Decorated function is a revset symbol
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171
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172 The name of the symbol must be given as the decorator argument.
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173 The symbol is added during `extsetup`.
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174
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175 example::
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176
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177 @eh.revset('hidden')
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178 def revsetbabar(repo, subset, x):
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179 args = revset.getargs(x, 0, 0, 'babar accept no argument')
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180 return [r for r in subset if 'babar' in repo[r].description()]
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181 """
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182 def dec(symbol):
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183 self._revsetsymbols.append((symbolname, symbol))
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184 return symbol
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185 return dec
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186
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187 def templatekw(self, keywordname):
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188 """Decorated function is a template keyword
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189
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190 The name of the keyword must be given as the decorator argument.
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191 The symbol is added during `extsetup`.
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192
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193 example::
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194
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195 @eh.templatekw('babar')
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196 def kwbabar(ctx):
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197 return 'babar'
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198 """
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199 def dec(keyword):
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200 self._templatekws.append((keywordname, keyword))
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201 return keyword
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202 return dec
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203
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204 def wrapcommand(self, command, extension=None, opts=[]):
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205 """Decorated function is a command wrapper
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206
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207 The name of the command must be given as the decorator argument.
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208 The wrapping is installed during `uisetup`.
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209
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210 If the second option `extension` argument is provided, the wrapping
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211 will be applied in the extension commandtable. This argument must be a
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212 string that will be searched using `extension.find` if not found and
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213 Abort error is raised. If the wrapping applies to an extension, it is
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214 installed during `extsetup`.
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215
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216 example::
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217
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218 @eh.wrapcommand('summary')
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219 def wrapsummary(orig, ui, repo, *args, **kwargs):
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220 ui.note('Barry!')
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221 return orig(ui, repo, *args, **kwargs)
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222
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223 The `opts` argument allows specifying additional arguments for the
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224 command.
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225
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226 """
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227 def dec(wrapper):
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228 if extension is None:
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229 self._commandwrappers.append((command, wrapper, opts))
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230 else:
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231 self._extcommandwrappers.append((extension, command, wrapper,
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232 opts))
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233 return wrapper
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234 return dec
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235
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236 def wrapfunction(self, container, funcname):
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237 """Decorated function is a function wrapper
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238
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239 This function takes two arguments, the container and the name of the
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240 function to wrap. The wrapping is performed during `uisetup`.
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241 (there is no extension support)
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242
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243 example::
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244
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245 @eh.function(discovery, 'checkheads')
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246 def wrapfunction(orig, *args, **kwargs):
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247 ui.note('His head smashed in and his heart cut out')
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248 return orig(*args, **kwargs)
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249 """
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250 def dec(wrapper):
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251 self._functionwrappers.append((container, funcname, wrapper))
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252 return wrapper
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253 return dec
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254
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255 def addattr(self, container, funcname):
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256 """Decorated function is to be added to the container
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257
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258 This function takes two arguments, the container and the name of the
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259 function to wrap. The wrapping is performed during `uisetup`.
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260
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261 example::
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262
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263 @eh.function(context.changectx, 'babar')
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264 def babar(ctx):
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265 return 'babar' in ctx.description
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266 """
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267 def dec(func):
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268 self._duckpunchers.append((container, funcname, func))
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269 return func
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270 return dec