Mercurial > hg
annotate mercurial/registrar.py @ 35204:d4b108fdf423
py3: use encoding.strtolocal() to convert string to bytes
Differential Revision: https://phab.mercurial-scm.org/D1557
author | Pulkit Goyal <7895pulkit@gmail.com> |
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date | Wed, 29 Nov 2017 08:40:25 +0530 |
parents | b22a0d9e0a83 |
children | e8d37838f5df |
rev | line source |
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1 # registrar.py - utilities to register function for specific purpose |
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2 # |
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3 # Copyright FUJIWARA Katsunori <foozy@lares.dti.ne.jp> and others |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
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6 # GNU General Public License version 2 or any later version. |
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7 |
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8 from __future__ import absolute_import |
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9 |
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10 from . import ( |
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11 configitems, |
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12 error, |
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13 pycompat, |
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14 util, |
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15 ) |
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16 |
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17 # unlike the other registered items, config options are neither functions or |
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18 # classes. Registering the option is just small function call. |
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19 # |
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20 # We still add the official API to the registrar module for consistency with |
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21 # the other items extensions want might to register. |
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22 configitem = configitems.getitemregister |
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23 |
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24 class _funcregistrarbase(object): |
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25 """Base of decorator to register a function for specific purpose |
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26 |
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27 This decorator stores decorated functions into own dict 'table'. |
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28 |
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29 The least derived class can be defined by overriding 'formatdoc', |
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30 for example:: |
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31 |
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32 class keyword(_funcregistrarbase): |
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33 _docformat = ":%s: %s" |
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34 |
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35 This should be used as below: |
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36 |
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37 keyword = registrar.keyword() |
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38 |
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39 @keyword('bar') |
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40 def barfunc(*args, **kwargs): |
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41 '''Explanation of bar keyword .... |
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42 ''' |
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43 pass |
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44 |
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45 In this case: |
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46 |
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47 - 'barfunc' is stored as 'bar' in '_table' of an instance 'keyword' above |
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48 - 'barfunc.__doc__' becomes ":bar: Explanation of bar keyword" |
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49 """ |
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50 def __init__(self, table=None): |
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51 if table is None: |
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52 self._table = {} |
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53 else: |
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54 self._table = table |
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55 |
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56 def __call__(self, decl, *args, **kwargs): |
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57 return lambda func: self._doregister(func, decl, *args, **kwargs) |
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58 |
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59 def _doregister(self, func, decl, *args, **kwargs): |
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60 name = self._getname(decl) |
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61 |
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62 if name in self._table: |
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63 msg = 'duplicate registration for name: "%s"' % name |
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64 raise error.ProgrammingError(msg) |
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65 |
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66 if func.__doc__ and not util.safehasattr(func, '_origdoc'): |
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67 doc = pycompat.sysbytes(func.__doc__).strip() |
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68 func._origdoc = doc |
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69 func.__doc__ = pycompat.sysstr(self._formatdoc(decl, doc)) |
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70 |
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71 self._table[name] = func |
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72 self._extrasetup(name, func, *args, **kwargs) |
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73 |
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74 return func |
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75 |
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76 def _parsefuncdecl(self, decl): |
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77 """Parse function declaration and return the name of function in it |
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78 """ |
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79 i = decl.find('(') |
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80 if i >= 0: |
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81 return decl[:i] |
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82 else: |
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83 return decl |
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84 |
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85 def _getname(self, decl): |
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86 """Return the name of the registered function from decl |
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87 |
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88 Derived class should override this, if it allows more |
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89 descriptive 'decl' string than just a name. |
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90 """ |
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91 return decl |
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92 |
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93 _docformat = None |
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94 |
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95 def _formatdoc(self, decl, doc): |
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96 """Return formatted document of the registered function for help |
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97 |
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98 'doc' is '__doc__.strip()' of the registered function. |
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99 """ |
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100 return self._docformat % (decl, doc) |
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101 |
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102 def _extrasetup(self, name, func): |
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103 """Execute exra setup for registered function, if needed |
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104 """ |
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105 |
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106 class command(_funcregistrarbase): |
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107 """Decorator to register a command function to table |
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108 |
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109 This class receives a command table as its argument. The table should |
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110 be a dict. |
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111 |
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112 The created object can be used as a decorator for adding commands to |
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113 that command table. This accepts multiple arguments to define a command. |
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114 |
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115 The first argument is the command name (as bytes). |
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116 |
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117 The `options` keyword argument is an iterable of tuples defining command |
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118 arguments. See ``mercurial.fancyopts.fancyopts()`` for the format of each |
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119 tuple. |
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120 |
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121 The `synopsis` argument defines a short, one line summary of how to use the |
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122 command. This shows up in the help output. |
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123 |
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124 There are three arguments that control what repository (if any) is found |
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125 and passed to the decorated function: `norepo`, `optionalrepo`, and |
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126 `inferrepo`. |
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127 |
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128 The `norepo` argument defines whether the command does not require a |
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129 local repository. Most commands operate against a repository, thus the |
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130 default is False. When True, no repository will be passed. |
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131 |
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132 The `optionalrepo` argument defines whether the command optionally requires |
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133 a local repository. If no repository can be found, None will be passed |
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134 to the decorated function. |
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135 |
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136 The `inferrepo` argument defines whether to try to find a repository from |
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137 the command line arguments. If True, arguments will be examined for |
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138 potential repository locations. See ``findrepo()``. If a repository is |
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139 found, it will be used and passed to the decorated function. |
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140 |
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141 There are three constants in the class which tells what type of the command |
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142 that is. That information will be helpful at various places. It will be also |
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143 be used to decide what level of access the command has on hidden commits. |
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144 The constants are: |
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145 |
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146 `unrecoverablewrite` is for those write commands which can't be recovered |
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147 like push. |
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148 `recoverablewrite` is for write commands which can be recovered like commit. |
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149 `readonly` is for commands which are read only. |
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150 |
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151 The signature of the decorated function looks like this: |
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152 def cmd(ui[, repo] [, <args>] [, <options>]) |
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153 |
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154 `repo` is required if `norepo` is False. |
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155 `<args>` are positional args (or `*args`) arguments, of non-option |
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156 arguments from the command line. |
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157 `<options>` are keyword arguments (or `**options`) of option arguments |
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158 from the command line. |
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159 |
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160 See the WritingExtensions and MercurialApi documentation for more exhaustive |
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161 descriptions and examples. |
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162 """ |
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163 |
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164 unrecoverablewrite = "unrecoverable" |
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165 recoverablewrite = "recoverable" |
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166 readonly = "readonly" |
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167 |
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168 possiblecmdtypes = {unrecoverablewrite, recoverablewrite, readonly} |
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169 |
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170 def _doregister(self, func, name, options=(), synopsis=None, |
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171 norepo=False, optionalrepo=False, inferrepo=False, |
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172 cmdtype=unrecoverablewrite): |
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173 |
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174 if cmdtype not in self.possiblecmdtypes: |
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175 raise error.ProgrammingError("unknown cmdtype value '%s' for " |
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176 "'%s' command" % (cmdtype, name)) |
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177 func.norepo = norepo |
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178 func.optionalrepo = optionalrepo |
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179 func.inferrepo = inferrepo |
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180 func.cmdtype = cmdtype |
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181 if synopsis: |
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182 self._table[name] = func, list(options), synopsis |
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183 else: |
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184 self._table[name] = func, list(options) |
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185 return func |
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186 |
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187 class revsetpredicate(_funcregistrarbase): |
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188 """Decorator to register revset predicate |
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189 |
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190 Usage:: |
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191 |
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192 revsetpredicate = registrar.revsetpredicate() |
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193 |
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194 @revsetpredicate('mypredicate(arg1, arg2[, arg3])') |
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195 def mypredicatefunc(repo, subset, x): |
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196 '''Explanation of this revset predicate .... |
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197 ''' |
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198 pass |
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199 |
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200 The first string argument is used also in online help. |
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201 |
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202 Optional argument 'safe' indicates whether a predicate is safe for |
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203 DoS attack (False by default). |
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204 |
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205 Optional argument 'takeorder' indicates whether a predicate function |
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206 takes ordering policy as the last argument. |
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207 |
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208 Optional argument 'weight' indicates the estimated run-time cost, useful |
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209 for static optimization, default is 1. Higher weight means more expensive. |
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210 Usually, revsets that are fast and return only one revision has a weight of |
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211 0.5 (ex. a symbol); revsets with O(changelog) complexity and read only the |
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212 changelog have weight 10 (ex. author); revsets reading manifest deltas have |
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213 weight 30 (ex. adds); revset reading manifest contents have weight 100 |
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214 (ex. contains). Note: those values are flexible. If the revset has a |
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215 same big-O time complexity as 'contains', but with a smaller constant, it |
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216 might have a weight of 90. |
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217 |
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218 'revsetpredicate' instance in example above can be used to |
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219 decorate multiple functions. |
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220 |
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221 Decorated functions are registered automatically at loading |
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222 extension, if an instance named as 'revsetpredicate' is used for |
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223 decorating in extension. |
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224 |
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225 Otherwise, explicit 'revset.loadpredicate()' is needed. |
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226 """ |
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227 _getname = _funcregistrarbase._parsefuncdecl |
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228 _docformat = "``%s``\n %s" |
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229 |
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230 def _extrasetup(self, name, func, safe=False, takeorder=False, weight=1): |
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231 func._safe = safe |
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232 func._takeorder = takeorder |
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233 func._weight = weight |
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234 |
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235 class filesetpredicate(_funcregistrarbase): |
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236 """Decorator to register fileset predicate |
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237 |
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238 Usage:: |
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239 |
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240 filesetpredicate = registrar.filesetpredicate() |
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241 |
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242 @filesetpredicate('mypredicate()') |
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243 def mypredicatefunc(mctx, x): |
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244 '''Explanation of this fileset predicate .... |
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245 ''' |
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246 pass |
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247 |
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248 The first string argument is used also in online help. |
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249 |
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250 Optional argument 'callstatus' indicates whether a predicate |
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251 implies 'matchctx.status()' at runtime or not (False, by |
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252 default). |
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253 |
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254 Optional argument 'callexisting' indicates whether a predicate |
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255 implies 'matchctx.existing()' at runtime or not (False, by |
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256 default). |
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257 |
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258 'filesetpredicate' instance in example above can be used to |
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259 decorate multiple functions. |
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260 |
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261 Decorated functions are registered automatically at loading |
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262 extension, if an instance named as 'filesetpredicate' is used for |
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263 decorating in extension. |
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264 |
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265 Otherwise, explicit 'fileset.loadpredicate()' is needed. |
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266 """ |
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267 _getname = _funcregistrarbase._parsefuncdecl |
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268 _docformat = "``%s``\n %s" |
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269 |
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270 def _extrasetup(self, name, func, callstatus=False, callexisting=False): |
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271 func._callstatus = callstatus |
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272 func._callexisting = callexisting |
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273 |
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274 class _templateregistrarbase(_funcregistrarbase): |
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275 """Base of decorator to register functions as template specific one |
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276 """ |
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277 _docformat = ":%s: %s" |
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278 |
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279 class templatekeyword(_templateregistrarbase): |
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280 """Decorator to register template keyword |
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281 |
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282 Usage:: |
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283 |
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284 templatekeyword = registrar.templatekeyword() |
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285 |
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286 @templatekeyword('mykeyword') |
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287 def mykeywordfunc(repo, ctx, templ, cache, revcache, **args): |
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288 '''Explanation of this template keyword .... |
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289 ''' |
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290 pass |
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291 |
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292 The first string argument is used also in online help. |
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293 |
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294 'templatekeyword' instance in example above can be used to |
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295 decorate multiple functions. |
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296 |
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297 Decorated functions are registered automatically at loading |
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298 extension, if an instance named as 'templatekeyword' is used for |
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299 decorating in extension. |
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300 |
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301 Otherwise, explicit 'templatekw.loadkeyword()' is needed. |
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302 """ |
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303 |
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304 class templatefilter(_templateregistrarbase): |
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305 """Decorator to register template filer |
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306 |
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307 Usage:: |
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308 |
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309 templatefilter = registrar.templatefilter() |
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310 |
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311 @templatefilter('myfilter') |
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312 def myfilterfunc(text): |
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313 '''Explanation of this template filter .... |
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314 ''' |
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315 pass |
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316 |
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317 The first string argument is used also in online help. |
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318 |
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319 'templatefilter' instance in example above can be used to |
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320 decorate multiple functions. |
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321 |
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322 Decorated functions are registered automatically at loading |
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323 extension, if an instance named as 'templatefilter' is used for |
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324 decorating in extension. |
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325 |
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326 Otherwise, explicit 'templatefilters.loadkeyword()' is needed. |
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327 """ |
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328 |
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329 class templatefunc(_templateregistrarbase): |
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330 """Decorator to register template function |
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331 |
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332 Usage:: |
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333 |
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334 templatefunc = registrar.templatefunc() |
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335 |
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336 @templatefunc('myfunc(arg1, arg2[, arg3])', argspec='arg1 arg2 arg3') |
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337 def myfuncfunc(context, mapping, args): |
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338 '''Explanation of this template function .... |
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339 ''' |
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340 pass |
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341 |
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342 The first string argument is used also in online help. |
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343 |
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344 If optional 'argspec' is defined, the function will receive 'args' as |
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345 a dict of named arguments. Otherwise 'args' is a list of positional |
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346 arguments. |
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347 |
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348 'templatefunc' instance in example above can be used to |
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349 decorate multiple functions. |
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350 |
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351 Decorated functions are registered automatically at loading |
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352 extension, if an instance named as 'templatefunc' is used for |
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353 decorating in extension. |
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354 |
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355 Otherwise, explicit 'templater.loadfunction()' is needed. |
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356 """ |
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357 _getname = _funcregistrarbase._parsefuncdecl |
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358 |
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359 def _extrasetup(self, name, func, argspec=None): |
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360 func._argspec = argspec |
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361 |
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362 class internalmerge(_funcregistrarbase): |
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363 """Decorator to register in-process merge tool |
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364 |
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365 Usage:: |
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366 |
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367 internalmerge = registrar.internalmerge() |
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368 |
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369 @internalmerge('mymerge', internalmerge.mergeonly, |
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370 onfailure=None, precheck=None): |
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371 def mymergefunc(repo, mynode, orig, fcd, fco, fca, |
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372 toolconf, files, labels=None): |
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373 '''Explanation of this internal merge tool .... |
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374 ''' |
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375 return 1, False # means "conflicted", "no deletion needed" |
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376 |
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377 The first string argument is used to compose actual merge tool name, |
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378 ":name" and "internal:name" (the latter is historical one). |
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379 |
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380 The second argument is one of merge types below: |
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381 |
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382 ========== ======== ======== ========= |
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383 merge type precheck premerge fullmerge |
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384 ========== ======== ======== ========= |
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385 nomerge x x x |
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386 mergeonly o x o |
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387 fullmerge o o o |
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388 ========== ======== ======== ========= |
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389 |
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390 Optional argument 'onfailure' is the format of warning message |
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391 to be used at failure of merging (target filename is specified |
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392 at formatting). Or, None or so, if warning message should be |
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393 suppressed. |
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394 |
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395 Optional argument 'precheck' is the function to be used |
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396 before actual invocation of internal merge tool itself. |
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397 It takes as same arguments as internal merge tool does, other than |
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398 'files' and 'labels'. If it returns false value, merging is aborted |
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399 immediately (and file is marked as "unresolved"). |
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400 |
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401 'internalmerge' instance in example above can be used to |
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402 decorate multiple functions. |
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403 |
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404 Decorated functions are registered automatically at loading |
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405 extension, if an instance named as 'internalmerge' is used for |
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406 decorating in extension. |
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407 |
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408 Otherwise, explicit 'filemerge.loadinternalmerge()' is needed. |
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409 """ |
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410 _docformat = "``:%s``\n %s" |
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411 |
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412 # merge type definitions: |
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413 nomerge = None |
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414 mergeonly = 'mergeonly' # just the full merge, no premerge |
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FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
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415 fullmerge = 'fullmerge' # both premerge and merge |
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FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
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416 |
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417 def _extrasetup(self, name, func, mergetype, |
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418 onfailure=None, precheck=None): |
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419 func.mergetype = mergetype |
50c44dee741a
filemerge: move decorator definition for internal merge tools to registrar
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
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420 func.onfailure = onfailure |
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filemerge: move decorator definition for internal merge tools to registrar
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
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421 func.precheck = precheck |