Mercurial > hg
annotate mercurial/extensions.py @ 28238:b57d45ec33b2
test: update test-bundle2-format.t comment
Now that bundle2 is used by default for all exchanges, this comment is obviously
out of date. Having deep testing of the API and expected behavior of the format
and its processing is still valuable, so the comment is updated.
author | Pierre-Yves David <pierre-yves.david@fb.com> |
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date | Thu, 25 Feb 2016 10:34:31 +0100 |
parents | 7f430b2ac7fd |
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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 _builtin = set(['hbisect', 'bookmarks', 'parentrevspec', 'progress', 'interhg', |
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28 'inotify']) |
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29 |
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30 def extensions(ui=None): |
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31 if ui: |
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32 def enabled(name): |
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33 for format in ['%s', 'hgext.%s']: |
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34 conf = ui.config('extensions', format % name) |
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35 if conf is not None and not conf.startswith('!'): |
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36 return True |
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37 else: |
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38 enabled = lambda name: True |
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39 for name in _order: |
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40 module = _extensions[name] |
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41 if module and enabled(name): |
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42 yield name, module |
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43 |
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44 def find(name): |
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45 '''return module with given extension name''' |
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46 mod = None |
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47 try: |
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48 mod = _extensions[name] |
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49 except KeyError: |
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50 for k, v in _extensions.iteritems(): |
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51 if k.endswith('.' + name) or k.endswith('/' + name): |
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52 mod = v |
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53 break |
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54 if not mod: |
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55 raise KeyError(name) |
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56 return mod |
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57 |
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58 def loadpath(path, module_name): |
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59 module_name = module_name.replace('.', '_') |
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60 path = util.normpath(util.expandpath(path)) |
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61 if os.path.isdir(path): |
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62 # module/__init__.py style |
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63 d, f = os.path.split(path) |
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64 fd, fpath, desc = imp.find_module(f, [d]) |
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65 return imp.load_module(module_name, fd, fpath, desc) |
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66 else: |
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67 try: |
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68 return imp.load_source(module_name, path) |
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69 except IOError as exc: |
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70 if not exc.filename: |
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71 exc.filename = path # python does not fill this |
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72 raise |
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73 |
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74 def load(ui, name, path): |
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75 if name.startswith('hgext.') or name.startswith('hgext/'): |
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76 shortname = name[6:] |
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77 else: |
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78 shortname = name |
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79 if shortname in _builtin: |
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80 return None |
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81 if shortname in _extensions: |
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82 return _extensions[shortname] |
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83 _extensions[shortname] = None |
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84 if path: |
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85 # the module will be loaded in sys.modules |
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86 # choose an unique name so that it doesn't |
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87 # conflicts with other modules |
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88 mod = loadpath(path, 'hgext.%s' % name) |
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89 else: |
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90 def importh(name): |
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91 mod = __import__(name) |
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92 components = name.split('.') |
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93 for comp in components[1:]: |
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94 mod = getattr(mod, comp) |
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95 return mod |
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96 try: |
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97 mod = importh("hgext.%s" % name) |
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98 except ImportError as err: |
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99 ui.debug('could not import hgext.%s (%s): trying %s\n' |
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100 % (name, err, name)) |
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101 if ui.debugflag: |
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102 ui.traceback() |
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103 mod = importh(name) |
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104 |
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105 # Before we do anything with the extension, check against minimum stated |
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106 # compatibility. This gives extension authors a mechanism to have their |
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107 # extensions short circuit when loaded with a known incompatible version |
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108 # of Mercurial. |
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109 minver = getattr(mod, 'minimumhgversion', None) |
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110 if minver and util.versiontuple(minver, 2) > util.versiontuple(n=2): |
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111 ui.warn(_('(third party extension %s requires version %s or newer ' |
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112 'of Mercurial; disabling)\n') % (shortname, minver)) |
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113 return |
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114 |
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115 _extensions[shortname] = mod |
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116 _order.append(shortname) |
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117 for fn in _aftercallbacks.get(shortname, []): |
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118 fn(loaded=True) |
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119 return mod |
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120 |
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121 def loadall(ui): |
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122 result = ui.configitems("extensions") |
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123 newindex = len(_order) |
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124 for (name, path) in result: |
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125 if path: |
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126 if path[0] == '!': |
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127 continue |
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128 try: |
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129 load(ui, name, path) |
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130 except KeyboardInterrupt: |
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131 raise |
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132 except Exception as inst: |
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133 if path: |
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134 ui.warn(_("*** failed to import extension %s from %s: %s\n") |
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135 % (name, path, inst)) |
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136 else: |
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137 ui.warn(_("*** failed to import extension %s: %s\n") |
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138 % (name, inst)) |
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139 ui.traceback() |
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140 |
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141 for name in _order[newindex:]: |
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142 uisetup = getattr(_extensions[name], 'uisetup', None) |
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143 if uisetup: |
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144 uisetup(ui) |
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145 |
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146 for name in _order[newindex:]: |
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147 extsetup = getattr(_extensions[name], 'extsetup', None) |
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148 if extsetup: |
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149 try: |
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150 extsetup(ui) |
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151 except TypeError: |
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152 if extsetup.func_code.co_argcount != 0: |
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153 raise |
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154 extsetup() # old extsetup with no ui argument |
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155 |
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156 # Call aftercallbacks that were never met. |
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157 for shortname in _aftercallbacks: |
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158 if shortname in _extensions: |
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159 continue |
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160 |
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161 for fn in _aftercallbacks[shortname]: |
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162 fn(loaded=False) |
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163 |
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164 # loadall() is called multiple times and lingering _aftercallbacks |
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165 # entries could result in double execution. See issue4646. |
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166 _aftercallbacks.clear() |
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167 |
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168 def afterloaded(extension, callback): |
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169 '''Run the specified function after a named extension is loaded. |
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170 |
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171 If the named extension is already loaded, the callback will be called |
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172 immediately. |
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173 |
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174 If the named extension never loads, the callback will be called after |
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175 all extensions have been loaded. |
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176 |
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177 The callback receives the named argument ``loaded``, which is a boolean |
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178 indicating whether the dependent extension actually loaded. |
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179 ''' |
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180 |
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181 if extension in _extensions: |
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182 callback(loaded=True) |
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183 else: |
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184 _aftercallbacks.setdefault(extension, []).append(callback) |
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185 |
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186 def bind(func, *args): |
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187 '''Partial function application |
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188 |
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189 Returns a new function that is the partial application of args and kwargs |
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190 to func. For example, |
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191 |
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192 f(1, 2, bar=3) === bind(f, 1)(2, bar=3)''' |
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193 assert callable(func) |
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194 def closure(*a, **kw): |
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195 return func(*(args + a), **kw) |
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196 return closure |
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197 |
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198 def wrapcommand(table, command, wrapper, synopsis=None, docstring=None): |
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199 '''Wrap the command named `command' in table |
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200 |
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201 Replace command in the command table with wrapper. The wrapped command will |
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202 be inserted into the command table specified by the table argument. |
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203 |
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204 The wrapper will be called like |
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205 |
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206 wrapper(orig, *args, **kwargs) |
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207 |
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208 where orig is the original (wrapped) function, and *args, **kwargs |
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209 are the arguments passed to it. |
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210 |
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211 Optionally append to the command synopsis and docstring, used for help. |
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212 For example, if your extension wraps the ``bookmarks`` command to add the |
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213 flags ``--remote`` and ``--all`` you might call this function like so: |
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214 |
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215 synopsis = ' [-a] [--remote]' |
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216 docstring = """ |
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217 |
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218 The ``remotenames`` extension adds the ``--remote`` and ``--all`` (``-a``) |
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219 flags to the bookmarks command. Either flag will show the remote bookmarks |
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220 known to the repository; ``--remote`` will also suppress the output of the |
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221 local bookmarks. |
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222 """ |
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223 |
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224 extensions.wrapcommand(commands.table, 'bookmarks', exbookmarks, |
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225 synopsis, docstring) |
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226 ''' |
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227 assert callable(wrapper) |
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228 aliases, entry = cmdutil.findcmd(command, table) |
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229 for alias, e in table.iteritems(): |
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230 if e is entry: |
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231 key = alias |
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232 break |
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233 |
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234 origfn = entry[0] |
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235 wrap = bind(util.checksignature(wrapper), util.checksignature(origfn)) |
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236 |
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237 wrap.__module__ = getattr(origfn, '__module__') |
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238 |
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239 doc = getattr(origfn, '__doc__') |
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240 if docstring is not None: |
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241 doc += docstring |
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242 wrap.__doc__ = doc |
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243 |
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244 newentry = list(entry) |
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245 newentry[0] = wrap |
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246 if synopsis is not None: |
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247 newentry[2] += synopsis |
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248 table[key] = tuple(newentry) |
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249 return entry |
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250 |
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251 def wrapfunction(container, funcname, wrapper): |
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252 '''Wrap the function named funcname in container |
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253 |
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254 Replace the funcname member in the given container with the specified |
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255 wrapper. The container is typically a module, class, or instance. |
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256 |
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257 The wrapper will be called like |
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258 |
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259 wrapper(orig, *args, **kwargs) |
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260 |
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261 where orig is the original (wrapped) function, and *args, **kwargs |
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262 are the arguments passed to it. |
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263 |
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264 Wrapping methods of the repository object is not recommended since |
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265 it conflicts with extensions that extend the repository by |
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266 subclassing. All extensions that need to extend methods of |
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267 localrepository should use this subclassing trick: namely, |
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268 reposetup() should look like |
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269 |
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270 def reposetup(ui, repo): |
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271 class myrepo(repo.__class__): |
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272 def whatever(self, *args, **kwargs): |
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273 [...extension stuff...] |
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274 super(myrepo, self).whatever(*args, **kwargs) |
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275 [...extension stuff...] |
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276 |
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277 repo.__class__ = myrepo |
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278 |
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279 In general, combining wrapfunction() with subclassing does not |
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280 work. Since you cannot control what other extensions are loaded by |
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281 your end users, you should play nicely with others by using the |
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282 subclass trick. |
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283 ''' |
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284 assert callable(wrapper) |
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285 |
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286 origfn = getattr(container, funcname) |
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287 assert callable(origfn) |
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288 setattr(container, funcname, bind(wrapper, origfn)) |
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289 return origfn |
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290 |
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291 def _disabledpaths(strip_init=False): |
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292 '''find paths of disabled extensions. returns a dict of {name: path} |
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293 removes /__init__.py from packages if strip_init is True''' |
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294 import hgext |
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295 extpath = os.path.dirname(os.path.abspath(hgext.__file__)) |
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296 try: # might not be a filesystem path |
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297 files = os.listdir(extpath) |
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298 except OSError: |
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299 return {} |
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300 |
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301 exts = {} |
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302 for e in files: |
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303 if e.endswith('.py'): |
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304 name = e.rsplit('.', 1)[0] |
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305 path = os.path.join(extpath, e) |
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306 else: |
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307 name = e |
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308 path = os.path.join(extpath, e, '__init__.py') |
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309 if not os.path.exists(path): |
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310 continue |
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311 if strip_init: |
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312 path = os.path.dirname(path) |
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313 if name in exts or name in _order or name == '__init__': |
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314 continue |
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315 exts[name] = path |
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316 return exts |
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317 |
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318 def _moduledoc(file): |
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319 '''return the top-level python documentation for the given file |
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320 |
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321 Loosely inspired by pydoc.source_synopsis(), but rewritten to |
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322 handle triple quotes and to return the whole text instead of just |
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323 the synopsis''' |
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324 result = [] |
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325 |
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326 line = file.readline() |
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327 while line[:1] == '#' or not line.strip(): |
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328 line = file.readline() |
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329 if not line: |
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330 break |
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331 |
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332 start = line[:3] |
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333 if start == '"""' or start == "'''": |
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334 line = line[3:] |
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335 while line: |
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336 if line.rstrip().endswith(start): |
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337 line = line.split(start)[0] |
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338 if line: |
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339 result.append(line) |
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340 break |
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341 elif not line: |
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342 return None # unmatched delimiter |
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343 result.append(line) |
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344 line = file.readline() |
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345 else: |
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346 return None |
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347 |
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348 return ''.join(result) |
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349 |
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350 def _disabledhelp(path): |
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351 '''retrieve help synopsis of a disabled extension (without importing)''' |
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352 try: |
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353 file = open(path) |
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354 except IOError: |
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355 return |
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356 else: |
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357 doc = _moduledoc(file) |
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358 file.close() |
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359 |
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360 if doc: # extracting localized synopsis |
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361 return gettext(doc).splitlines()[0] |
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362 else: |
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363 return _('(no help text available)') |
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364 |
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365 def disabled(): |
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366 '''find disabled extensions from hgext. returns a dict of {name: desc}''' |
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367 try: |
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368 from hgext import __index__ |
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369 return dict((name, gettext(desc)) |
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370 for name, desc in __index__.docs.iteritems() |
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371 if name not in _order) |
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372 except (ImportError, AttributeError): |
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373 pass |
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374 |
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375 paths = _disabledpaths() |
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376 if not paths: |
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377 return {} |
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378 |
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379 exts = {} |
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380 for name, path in paths.iteritems(): |
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381 doc = _disabledhelp(path) |
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382 if doc: |
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383 exts[name] = doc |
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384 |
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385 return exts |
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386 |
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387 def disabledext(name): |
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388 '''find a specific disabled extension from hgext. returns desc''' |
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389 try: |
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390 from hgext import __index__ |
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391 if name in _order: # enabled |
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392 return |
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393 else: |
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394 return gettext(__index__.docs.get(name)) |
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395 except (ImportError, AttributeError): |
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396 pass |
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397 |
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398 paths = _disabledpaths() |
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399 if name in paths: |
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400 return _disabledhelp(paths[name]) |
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401 |
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402 def disabledcmd(ui, cmd, strict=False): |
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403 '''import disabled extensions until cmd is found. |
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404 returns (cmdname, extname, module)''' |
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405 |
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406 paths = _disabledpaths(strip_init=True) |
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407 if not paths: |
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408 raise error.UnknownCommand(cmd) |
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409 |
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410 def findcmd(cmd, name, path): |
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411 try: |
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412 mod = loadpath(path, 'hgext.%s' % name) |
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413 except Exception: |
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414 return |
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415 try: |
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416 aliases, entry = cmdutil.findcmd(cmd, |
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417 getattr(mod, 'cmdtable', {}), strict) |
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418 except (error.AmbiguousCommand, error.UnknownCommand): |
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419 return |
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420 except Exception: |
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421 ui.warn(_('warning: error finding commands in %s\n') % path) |
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422 ui.traceback() |
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423 return |
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424 for c in aliases: |
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425 if c.startswith(cmd): |
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426 cmd = c |
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427 break |
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428 else: |
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429 cmd = aliases[0] |
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430 return (cmd, name, mod) |
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431 |
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432 ext = None |
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433 # first, search for an extension with the same name as the command |
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434 path = paths.pop(cmd, None) |
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435 if path: |
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|
436 ext = findcmd(cmd, cmd, path) |
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|
437 if not ext: |
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438 # otherwise, interrogate each extension until there's a match |
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|
439 for name, path in paths.iteritems(): |
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440 ext = findcmd(cmd, name, path) |
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441 if ext: |
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|
442 break |
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|
443 if ext and 'DEPRECATED' not in ext.__doc__: |
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444 return ext |
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445 |
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446 raise error.UnknownCommand(cmd) |
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|
447 |
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help: use full name of extensions to look up them for keyword search
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|
448 def enabled(shortname=True): |
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449 '''return a dict of {name: desc} of extensions''' |
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|
450 exts = {} |
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451 for ename, ext in extensions(): |
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452 doc = (gettext(ext.__doc__) or _('(no help text available)')) |
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|
453 if shortname: |
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diff
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|
454 ename = ename.split('.')[-1] |
9136
31177742f54a
for calls expecting bool args, pass bool instead of int
Nicolas Dumazet <nicdumz.commits@gmail.com>
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diff
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|
455 exts[ename] = doc.splitlines()[0].strip() |
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|
456 |
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changeset
|
457 return exts |
21848
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version: show enabled extensions (issue4209)
anatoly techtonik <techtonik@gmail.com>
parents:
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diff
changeset
|
458 |
28155
7f430b2ac7fd
extensions: add notloaded method to return extensions failed to load
Jun Wu <quark@fb.com>
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|
459 def notloaded(): |
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|
460 '''return short names of extensions that failed to load''' |
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461 return [name for name, mod in _extensions.iteritems() if mod is None] |
7f430b2ac7fd
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diff
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|
462 |
21848
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version: show enabled extensions (issue4209)
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diff
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|
463 def moduleversion(module): |
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|
464 '''return version information from given module as a string''' |
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diff
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|
465 if (util.safehasattr(module, 'getversion') |
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diff
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|
466 and callable(module.getversion)): |
ecdbbb6e5d06
version: show enabled extensions (issue4209)
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parents:
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diff
changeset
|
467 version = module.getversion() |
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version: show enabled extensions (issue4209)
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parents:
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diff
changeset
|
468 elif util.safehasattr(module, '__version__'): |
ecdbbb6e5d06
version: show enabled extensions (issue4209)
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parents:
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diff
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|
469 version = module.__version__ |
ecdbbb6e5d06
version: show enabled extensions (issue4209)
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parents:
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diff
changeset
|
470 else: |
ecdbbb6e5d06
version: show enabled extensions (issue4209)
anatoly techtonik <techtonik@gmail.com>
parents:
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diff
changeset
|
471 version = '' |
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diff
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|
472 if isinstance(version, (list, tuple)): |
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parents:
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diff
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|
473 version = '.'.join(str(o) for o in version) |
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diff
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|
474 return version |
27990
96bfd2875213
version: verbose list internal and external extension source (issue4731)
liscju <piotr.listkiewicz@gmail.com>
parents:
27637
diff
changeset
|
475 |
96bfd2875213
version: verbose list internal and external extension source (issue4731)
liscju <piotr.listkiewicz@gmail.com>
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diff
changeset
|
476 def ismoduleinternal(module): |
96bfd2875213
version: verbose list internal and external extension source (issue4731)
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diff
changeset
|
477 exttestedwith = getattr(module, 'testedwith', None) |
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version: verbose list internal and external extension source (issue4731)
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diff
changeset
|
478 return exttestedwith == "internal" |