Mercurial > evolve

annotate hgext3rd/evolve/exthelper.py @ 2926:1abafae41fe2

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evolve: use registrar.templatekeyword to register template keyword functions Now, using registrar.templatekeyword 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. BTW, this also fixes an issue of "hg help templates" output that template keywords "precursors" and "successors" are not displayed as same as others, because they do not have ":KEYWORD:" prefix in their docstring.
author FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
date Mon, 07 Aug 2017 23:22:41 +0900
parents 9efedcedd9dd
children
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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 templatekeyword = registrar.templatekeyword()
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103 for name, kw in self._templatekws:
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104 templatekeyword(name)(kw)
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105 templatekw.loadkeyword(ui, 'evolve', templatekeyword)
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106
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107 for ext, command, wrapper, opts in self._extcommandwrappers:
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108 if ext not in knownexts:
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109 try:
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110 e = extensions.find(ext)
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111 except KeyError:
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112 # Extension isn't enabled, so don't bother trying to wrap
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113 # it.
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114 continue
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115 knownexts[ext] = e.cmdtable
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116 entry = extensions.wrapcommand(knownexts[ext], command, wrapper)
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117 if opts:
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118 for short, long, val, msg in opts:
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119 entry[1].append((short, long, val, msg))
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120
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121 for c in self._extcallables:
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122 c(ui)
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123
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124 def final_reposetup(self, ui, repo):
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125 """Method to be used as the extension reposetup
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126
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127 The following operations belong here:
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128
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129 - All hooks but pre-* and post-*
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130 - Modify configuration variables
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131 - Changes to repo.__class__, repo.dirstate.__class__
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132 """
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133 for c in self._repocallables:
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134 c(ui, repo)
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135
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136 def uisetup(self, call):
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137 """Decorated function will be executed during uisetup
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138
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139 example::
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140
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141 @eh.uisetup
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142 def setupbabar(ui):
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143 print 'this is uisetup!'
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144 """
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145 self._uicallables.append(call)
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146 return call
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147
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148 def extsetup(self, call):
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149 """Decorated function will be executed during extsetup
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150
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151 example::
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152
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153 @eh.extsetup
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154 def setupcelestine(ui):
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155 print 'this is extsetup!'
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156 """
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157 self._extcallables.append(call)
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158 return call
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159
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160 def reposetup(self, call):
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161 """Decorated function will be executed during reposetup
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162
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163 example::
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164
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165 @eh.reposetup
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166 def setupzephir(ui, repo):
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167 print 'this is reposetup!'
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168 """
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169 self._repocallables.append(call)
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170 return call
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171
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172 def revset(self, symbolname):
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173 """Decorated function is a revset symbol
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174
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175 The name of the symbol must be given as the decorator argument.
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176 The symbol is added during `extsetup`.
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177
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178 example::
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179
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180 @eh.revset('hidden')
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181 def revsetbabar(repo, subset, x):
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182 args = revset.getargs(x, 0, 0, 'babar accept no argument')
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183 return [r for r in subset if 'babar' in repo[r].description()]
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184 """
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185 def dec(symbol):
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186 self._revsetsymbols.append((symbolname, symbol))
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187 return symbol
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188 return dec
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189
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190 def templatekw(self, keywordname):
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191 """Decorated function is a template keyword
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192
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193 The name of the keyword must be given as the decorator argument.
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194 The symbol is added during `extsetup`.
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195
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196 example::
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197
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198 @eh.templatekw('babar')
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199 def kwbabar(ctx):
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200 return 'babar'
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201 """
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202 def dec(keyword):
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203 self._templatekws.append((keywordname, keyword))
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204 return keyword
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205 return dec
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206
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207 def wrapcommand(self, command, extension=None, opts=[]):
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208 """Decorated function is a command wrapper
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209
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210 The name of the command must be given as the decorator argument.
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211 The wrapping is installed during `uisetup`.
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212
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213 If the second option `extension` argument is provided, the wrapping
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214 will be applied in the extension commandtable. This argument must be a
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215 string that will be searched using `extension.find` if not found and
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216 Abort error is raised. If the wrapping applies to an extension, it is
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217 installed during `extsetup`.
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218
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219 example::
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220
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221 @eh.wrapcommand('summary')
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222 def wrapsummary(orig, ui, repo, *args, **kwargs):
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223 ui.note('Barry!')
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224 return orig(ui, repo, *args, **kwargs)
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225
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226 The `opts` argument allows specifying additional arguments for the
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227 command.
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228
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229 """
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230 def dec(wrapper):
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231 if extension is None:
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232 self._commandwrappers.append((command, wrapper, opts))
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233 else:
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234 self._extcommandwrappers.append((extension, command, wrapper,
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235 opts))
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236 return wrapper
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237 return dec
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238
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239 def wrapfunction(self, container, funcname):
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240 """Decorated function is a function wrapper
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241
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242 This function takes two arguments, the container and the name of the
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243 function to wrap. The wrapping is performed during `uisetup`.
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244 (there is no extension support)
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245
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246 example::
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247
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248 @eh.function(discovery, 'checkheads')
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249 def wrapfunction(orig, *args, **kwargs):
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250 ui.note('His head smashed in and his heart cut out')
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251 return orig(*args, **kwargs)
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252 """
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253 def dec(wrapper):
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254 self._functionwrappers.append((container, funcname, wrapper))
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255 return wrapper
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256 return dec
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257
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258 def addattr(self, container, funcname):
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259 """Decorated function is to be added to the container
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260
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261 This function takes two arguments, the container and the name of the
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262 function to wrap. The wrapping is performed during `uisetup`.
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263
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264 example::
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265
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266 @eh.function(context.changectx, 'babar')
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267 def babar(ctx):
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268 return 'babar' in ctx.description
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269 """
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270 def dec(func):
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271 self._duckpunchers.append((container, funcname, func))
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272 return func
6989d8fe4ed2 merge evolve and obsolete
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 490
diff changeset
273 return dec