Mercurial > hg
annotate mercurial/extensions.py @ 25946:5e0d80195a0f
extensions: use absolute_import
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Sat, 08 Aug 2015 19:13:14 -0700 |
parents | 328739ea70c3 |
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1 # extensions.py - extension handling for mercurial |
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2 # |
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3 # Copyright 2005-2007 Matt Mackall <mpm@selenic.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 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 import imp |
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11 import os |
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12 |
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13 from .i18n import ( |
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14 _, |
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15 gettext, |
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16 ) |
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17 |
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18 from . import ( |
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19 cmdutil, |
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20 error, |
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21 util, |
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22 ) |
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23 |
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24 _extensions = {} |
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25 _aftercallbacks = {} |
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26 _order = [] |
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27 _ignore = ['hbisect', 'bookmarks', 'parentrevspec', 'interhg', 'inotify'] |
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28 |
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29 def extensions(ui=None): |
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30 if ui: |
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31 def enabled(name): |
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32 for format in ['%s', 'hgext.%s']: |
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33 conf = ui.config('extensions', format % name) |
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34 if conf is not None and not conf.startswith('!'): |
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35 return True |
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36 else: |
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37 enabled = lambda name: True |
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38 for name in _order: |
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39 module = _extensions[name] |
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40 if module and enabled(name): |
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41 yield name, module |
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42 |
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43 def find(name): |
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44 '''return module with given extension name''' |
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45 mod = None |
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46 try: |
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47 mod = _extensions[name] |
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48 except KeyError: |
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49 for k, v in _extensions.iteritems(): |
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50 if k.endswith('.' + name) or k.endswith('/' + name): |
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51 mod = v |
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52 break |
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53 if not mod: |
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54 raise KeyError(name) |
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55 return mod |
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56 |
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57 def loadpath(path, module_name): |
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58 module_name = module_name.replace('.', '_') |
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59 path = util.normpath(util.expandpath(path)) |
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60 if os.path.isdir(path): |
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61 # module/__init__.py style |
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62 d, f = os.path.split(path) |
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63 fd, fpath, desc = imp.find_module(f, [d]) |
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64 return imp.load_module(module_name, fd, fpath, desc) |
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65 else: |
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66 try: |
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67 return imp.load_source(module_name, path) |
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68 except IOError as exc: |
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69 if not exc.filename: |
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70 exc.filename = path # python does not fill this |
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71 raise |
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72 |
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73 def load(ui, name, path): |
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74 if name.startswith('hgext.') or name.startswith('hgext/'): |
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75 shortname = name[6:] |
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76 else: |
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77 shortname = name |
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78 if shortname in _ignore: |
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79 return None |
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80 if shortname in _extensions: |
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81 return _extensions[shortname] |
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82 _extensions[shortname] = None |
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83 if path: |
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84 # the module will be loaded in sys.modules |
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85 # choose an unique name so that it doesn't |
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86 # conflicts with other modules |
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87 mod = loadpath(path, 'hgext.%s' % name) |
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88 else: |
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89 def importh(name): |
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90 mod = __import__(name) |
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91 components = name.split('.') |
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92 for comp in components[1:]: |
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93 mod = getattr(mod, comp) |
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94 return mod |
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95 try: |
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96 mod = importh("hgext.%s" % name) |
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97 except ImportError as err: |
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98 ui.debug('could not import hgext.%s (%s): trying %s\n' |
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99 % (name, err, name)) |
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100 if ui.debugflag: |
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101 ui.traceback() |
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102 mod = importh(name) |
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103 _extensions[shortname] = mod |
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104 _order.append(shortname) |
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105 for fn in _aftercallbacks.get(shortname, []): |
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106 fn(loaded=True) |
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107 return mod |
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108 |
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109 def loadall(ui): |
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110 result = ui.configitems("extensions") |
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111 newindex = len(_order) |
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112 for (name, path) in result: |
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113 if path: |
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114 if path[0] == '!': |
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115 continue |
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116 try: |
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117 load(ui, name, path) |
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118 except KeyboardInterrupt: |
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119 raise |
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120 except Exception as inst: |
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121 if path: |
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122 ui.warn(_("*** failed to import extension %s from %s: %s\n") |
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123 % (name, path, inst)) |
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124 else: |
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125 ui.warn(_("*** failed to import extension %s: %s\n") |
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126 % (name, inst)) |
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127 ui.traceback() |
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128 |
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129 for name in _order[newindex:]: |
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130 uisetup = getattr(_extensions[name], 'uisetup', None) |
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131 if uisetup: |
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132 uisetup(ui) |
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133 |
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134 for name in _order[newindex:]: |
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135 extsetup = getattr(_extensions[name], 'extsetup', None) |
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136 if extsetup: |
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137 try: |
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138 extsetup(ui) |
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139 except TypeError: |
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140 if extsetup.func_code.co_argcount != 0: |
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141 raise |
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142 extsetup() # old extsetup with no ui argument |
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143 |
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144 # Call aftercallbacks that were never met. |
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145 for shortname in _aftercallbacks: |
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146 if shortname in _extensions: |
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147 continue |
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148 |
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149 for fn in _aftercallbacks[shortname]: |
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150 fn(loaded=False) |
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151 |
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152 # loadall() is called multiple times and lingering _aftercallbacks |
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153 # entries could result in double execution. See issue4646. |
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154 _aftercallbacks.clear() |
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155 |
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156 def afterloaded(extension, callback): |
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157 '''Run the specified function after a named extension is loaded. |
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158 |
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159 If the named extension is already loaded, the callback will be called |
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160 immediately. |
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161 |
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162 If the named extension never loads, the callback will be called after |
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163 all extensions have been loaded. |
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164 |
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165 The callback receives the named argument ``loaded``, which is a boolean |
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166 indicating whether the dependent extension actually loaded. |
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167 ''' |
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168 |
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169 if extension in _extensions: |
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170 callback(loaded=True) |
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171 else: |
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172 _aftercallbacks.setdefault(extension, []).append(callback) |
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173 |
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174 def bind(func, *args): |
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175 '''Partial function application |
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176 |
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177 Returns a new function that is the partial application of args and kwargs |
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178 to func. For example, |
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179 |
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180 f(1, 2, bar=3) === bind(f, 1)(2, bar=3)''' |
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181 assert callable(func) |
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182 def closure(*a, **kw): |
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183 return func(*(args + a), **kw) |
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184 return closure |
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185 |
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186 def wrapcommand(table, command, wrapper, synopsis=None, docstring=None): |
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187 '''Wrap the command named `command' in table |
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188 |
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189 Replace command in the command table with wrapper. The wrapped command will |
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190 be inserted into the command table specified by the table argument. |
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191 |
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192 The wrapper will be called like |
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193 |
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194 wrapper(orig, *args, **kwargs) |
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195 |
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196 where orig is the original (wrapped) function, and *args, **kwargs |
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197 are the arguments passed to it. |
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198 |
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199 Optionally append to the command synopsis and docstring, used for help. |
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200 For example, if your extension wraps the ``bookmarks`` command to add the |
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201 flags ``--remote`` and ``--all`` you might call this function like so: |
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202 |
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203 synopsis = ' [-a] [--remote]' |
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204 docstring = """ |
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205 |
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206 The ``remotenames`` extension adds the ``--remote`` and ``--all`` (``-a``) |
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207 flags to the bookmarks command. Either flag will show the remote bookmarks |
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208 known to the repository; ``--remote`` will also supress the output of the |
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209 local bookmarks. |
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210 """ |
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211 |
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212 extensions.wrapcommand(commands.table, 'bookmarks', exbookmarks, |
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213 synopsis, docstring) |
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214 ''' |
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215 assert callable(wrapper) |
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216 aliases, entry = cmdutil.findcmd(command, table) |
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217 for alias, e in table.iteritems(): |
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218 if e is entry: |
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219 key = alias |
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220 break |
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221 |
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222 origfn = entry[0] |
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223 wrap = bind(util.checksignature(wrapper), util.checksignature(origfn)) |
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224 |
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225 wrap.__module__ = getattr(origfn, '__module__') |
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226 |
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227 doc = getattr(origfn, '__doc__') |
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228 if docstring is not None: |
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229 doc += docstring |
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230 wrap.__doc__ = doc |
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231 |
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232 newentry = list(entry) |
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233 newentry[0] = wrap |
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234 if synopsis is not None: |
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235 newentry[2] += synopsis |
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236 table[key] = tuple(newentry) |
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237 return entry |
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238 |
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239 def wrapfunction(container, funcname, wrapper): |
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240 '''Wrap the function named funcname in container |
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241 |
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242 Replace the funcname member in the given container with the specified |
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243 wrapper. The container is typically a module, class, or instance. |
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244 |
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245 The wrapper will be called like |
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246 |
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247 wrapper(orig, *args, **kwargs) |
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248 |
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249 where orig is the original (wrapped) function, and *args, **kwargs |
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250 are the arguments passed to it. |
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251 |
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252 Wrapping methods of the repository object is not recommended since |
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253 it conflicts with extensions that extend the repository by |
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254 subclassing. All extensions that need to extend methods of |
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255 localrepository should use this subclassing trick: namely, |
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256 reposetup() should look like |
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257 |
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258 def reposetup(ui, repo): |
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259 class myrepo(repo.__class__): |
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260 def whatever(self, *args, **kwargs): |
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261 [...extension stuff...] |
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262 super(myrepo, self).whatever(*args, **kwargs) |
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263 [...extension stuff...] |
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264 |
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265 repo.__class__ = myrepo |
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266 |
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267 In general, combining wrapfunction() with subclassing does not |
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268 work. Since you cannot control what other extensions are loaded by |
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269 your end users, you should play nicely with others by using the |
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270 subclass trick. |
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271 ''' |
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272 assert callable(wrapper) |
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273 |
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274 origfn = getattr(container, funcname) |
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275 assert callable(origfn) |
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276 setattr(container, funcname, bind(wrapper, origfn)) |
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277 return origfn |
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278 |
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279 def _disabledpaths(strip_init=False): |
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280 '''find paths of disabled extensions. returns a dict of {name: path} |
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281 removes /__init__.py from packages if strip_init is True''' |
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282 import hgext |
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283 extpath = os.path.dirname(os.path.abspath(hgext.__file__)) |
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284 try: # might not be a filesystem path |
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285 files = os.listdir(extpath) |
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286 except OSError: |
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287 return {} |
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288 |
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289 exts = {} |
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290 for e in files: |
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291 if e.endswith('.py'): |
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292 name = e.rsplit('.', 1)[0] |
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293 path = os.path.join(extpath, e) |
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294 else: |
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295 name = e |
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296 path = os.path.join(extpath, e, '__init__.py') |
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297 if not os.path.exists(path): |
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298 continue |
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299 if strip_init: |
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300 path = os.path.dirname(path) |
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301 if name in exts or name in _order or name == '__init__': |
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302 continue |
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303 exts[name] = path |
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304 return exts |
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305 |
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306 def _moduledoc(file): |
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307 '''return the top-level python documentation for the given file |
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308 |
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309 Loosely inspired by pydoc.source_synopsis(), but rewritten to |
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310 handle triple quotes and to return the whole text instead of just |
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311 the synopsis''' |
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312 result = [] |
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313 |
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314 line = file.readline() |
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315 while line[:1] == '#' or not line.strip(): |
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316 line = file.readline() |
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317 if not line: |
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318 break |
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319 |
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320 start = line[:3] |
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321 if start == '"""' or start == "'''": |
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322 line = line[3:] |
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323 while line: |
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324 if line.rstrip().endswith(start): |
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325 line = line.split(start)[0] |
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326 if line: |
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327 result.append(line) |
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328 break |
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329 elif not line: |
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330 return None # unmatched delimiter |
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331 result.append(line) |
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332 line = file.readline() |
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333 else: |
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334 return None |
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335 |
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336 return ''.join(result) |
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337 |
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338 def _disabledhelp(path): |
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339 '''retrieve help synopsis of a disabled extension (without importing)''' |
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340 try: |
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341 file = open(path) |
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342 except IOError: |
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343 return |
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344 else: |
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345 doc = _moduledoc(file) |
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346 file.close() |
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347 |
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348 if doc: # extracting localized synopsis |
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349 return gettext(doc).splitlines()[0] |
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350 else: |
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351 return _('(no help text available)') |
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352 |
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353 def disabled(): |
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354 '''find disabled extensions from hgext. returns a dict of {name: desc}''' |
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355 try: |
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356 from hgext import __index__ |
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357 return dict((name, gettext(desc)) |
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358 for name, desc in __index__.docs.iteritems() |
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359 if name not in _order) |
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360 except (ImportError, AttributeError): |
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361 pass |
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362 |
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363 paths = _disabledpaths() |
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364 if not paths: |
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365 return {} |
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366 |
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367 exts = {} |
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368 for name, path in paths.iteritems(): |
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369 doc = _disabledhelp(path) |
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370 if doc: |
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371 exts[name] = doc |
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372 |
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373 return exts |
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374 |
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375 def disabledext(name): |
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376 '''find a specific disabled extension from hgext. returns desc''' |
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377 try: |
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378 from hgext import __index__ |
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379 if name in _order: # enabled |
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380 return |
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381 else: |
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382 return gettext(__index__.docs.get(name)) |
21229
54d7657d7d1e
setup.py, make: avoid problems with outdated, existing hgext/__index__.py*
Thomas Arendsen Hein <thomas@intevation.de>
parents:
20645
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383 except (ImportError, AttributeError): |
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384 pass |
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385 |
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386 paths = _disabledpaths() |
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387 if name in paths: |
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388 return _disabledhelp(paths[name]) |
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389 |
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390 def disabledcmd(ui, cmd, strict=False): |
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391 '''import disabled extensions until cmd is found. |
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392 returns (cmdname, extname, module)''' |
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393 |
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394 paths = _disabledpaths(strip_init=True) |
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395 if not paths: |
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396 raise error.UnknownCommand(cmd) |
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397 |
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398 def findcmd(cmd, name, path): |
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399 try: |
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400 mod = loadpath(path, 'hgext.%s' % name) |
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401 except Exception: |
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402 return |
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403 try: |
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404 aliases, entry = cmdutil.findcmd(cmd, |
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405 getattr(mod, 'cmdtable', {}), strict) |
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406 except (error.AmbiguousCommand, error.UnknownCommand): |
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407 return |
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408 except Exception: |
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|
409 ui.warn(_('warning: error finding commands in %s\n') % path) |
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|
410 ui.traceback() |
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extensions: warn about invalid extensions when listing disabled commands
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411 return |
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412 for c in aliases: |
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|
413 if c.startswith(cmd): |
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|
414 cmd = c |
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diff
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|
415 break |
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|
416 else: |
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|
417 cmd = aliases[0] |
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418 return (cmd, name, mod) |
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|
419 |
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extensions: don't suggest commands from deprecated extensions
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|
420 ext = None |
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421 # first, search for an extension with the same name as the command |
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422 path = paths.pop(cmd, None) |
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|
423 if path: |
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diff
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|
424 ext = findcmd(cmd, cmd, path) |
16667
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extensions: don't suggest commands from deprecated extensions
Martin Geisler <mg@lazybytes.net>
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diff
changeset
|
425 if not ext: |
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diff
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|
426 # otherwise, interrogate each extension until there's a match |
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extensions: don't suggest commands from deprecated extensions
Martin Geisler <mg@lazybytes.net>
parents:
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diff
changeset
|
427 for name, path in paths.iteritems(): |
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extensions: don't suggest commands from deprecated extensions
Martin Geisler <mg@lazybytes.net>
parents:
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diff
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|
428 ext = findcmd(cmd, name, path) |
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extensions: don't suggest commands from deprecated extensions
Martin Geisler <mg@lazybytes.net>
parents:
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diff
changeset
|
429 if ext: |
bdb7ae65c27c
extensions: don't suggest commands from deprecated extensions
Martin Geisler <mg@lazybytes.net>
parents:
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diff
changeset
|
430 break |
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extensions: don't suggest commands from deprecated extensions
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parents:
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diff
changeset
|
431 if ext and 'DEPRECATED' not in ext.__doc__: |
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|
432 return ext |
10364
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|
433 |
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|
434 raise error.UnknownCommand(cmd) |
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diff
changeset
|
435 |
19769
83d79a00cc24
help: use full name of extensions to look up them for keyword search
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
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diff
changeset
|
436 def enabled(shortname=True): |
14530
cd31a1cc1521
extensions: update doc of enabled() and disabled() according to d5b525697ddb
Yuya Nishihara <yuya@tcha.org>
parents:
14415
diff
changeset
|
437 '''return a dict of {name: desc} of extensions''' |
8871
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extensions: move extensions listing functions from mercurial.help
Cédric Duval <cedricduval@free.fr>
parents:
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diff
changeset
|
438 exts = {} |
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extensions: move extensions listing functions from mercurial.help
Cédric Duval <cedricduval@free.fr>
parents:
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diff
changeset
|
439 for ename, ext in extensions(): |
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extensions: move extensions listing functions from mercurial.help
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|
440 doc = (gettext(ext.__doc__) or _('(no help text available)')) |
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help: use full name of extensions to look up them for keyword search
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diff
changeset
|
441 if shortname: |
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help: use full name of extensions to look up them for keyword search
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diff
changeset
|
442 ename = ename.split('.')[-1] |
9136
31177742f54a
for calls expecting bool args, pass bool instead of int
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents:
9020
diff
changeset
|
443 exts[ename] = doc.splitlines()[0].strip() |
8871
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diff
changeset
|
444 |
14316
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extensions: drop maxlength from enabled and disabled
Matt Mackall <mpm@selenic.com>
parents:
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diff
changeset
|
445 return exts |
21848
ecdbbb6e5d06
version: show enabled extensions (issue4209)
anatoly techtonik <techtonik@gmail.com>
parents:
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diff
changeset
|
446 |
ecdbbb6e5d06
version: show enabled extensions (issue4209)
anatoly techtonik <techtonik@gmail.com>
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diff
changeset
|
447 def moduleversion(module): |
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version: show enabled extensions (issue4209)
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|
448 '''return version information from given module as a string''' |
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version: show enabled extensions (issue4209)
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diff
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|
449 if (util.safehasattr(module, 'getversion') |
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parents:
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diff
changeset
|
450 and callable(module.getversion)): |
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parents:
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diff
changeset
|
451 version = module.getversion() |
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version: show enabled extensions (issue4209)
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parents:
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diff
changeset
|
452 elif util.safehasattr(module, '__version__'): |
ecdbbb6e5d06
version: show enabled extensions (issue4209)
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parents:
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diff
changeset
|
453 version = module.__version__ |
ecdbbb6e5d06
version: show enabled extensions (issue4209)
anatoly techtonik <techtonik@gmail.com>
parents:
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diff
changeset
|
454 else: |
ecdbbb6e5d06
version: show enabled extensions (issue4209)
anatoly techtonik <techtonik@gmail.com>
parents:
21795
diff
changeset
|
455 version = '' |
ecdbbb6e5d06
version: show enabled extensions (issue4209)
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parents:
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diff
changeset
|
456 if isinstance(version, (list, tuple)): |
ecdbbb6e5d06
version: show enabled extensions (issue4209)
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parents:
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diff
changeset
|
457 version = '.'.join(str(o) for o in version) |
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diff
changeset
|
458 return version |