Mercurial > evolve
annotate hgext3rd/evolve/exthelper.py @ 2934:e16981ccfca9 default tip
readme: mention compatibility with future 4.4
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Fri, 15 Sep 2017 16:28:59 +0200 |
parents | 1abafae41fe2 |
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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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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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flake8: update the code sources to fixes a horde of pyflake warnings
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
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2024
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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 |
6989d8fe4ed2
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Pierre-Yves David <pierre-yves.david@logilab.fr>
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490
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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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Pierre-Yves David <pierre-yves.david@logilab.fr>
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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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Pierre-Yves David <pierre-yves.david@logilab.fr>
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252 """ |
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Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
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253 def dec(wrapper): |
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254 self._functionwrappers.append((container, funcname, wrapper)) |
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Pierre-Yves David <pierre-yves.david@logilab.fr>
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255 return wrapper |
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Pierre-Yves David <pierre-yves.david@logilab.fr>
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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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Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
490
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262 function to wrap. The wrapping is performed during `uisetup`. |
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parents:
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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 |
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273 return dec |