Mercurial > hg
annotate mercurial/extensions.py @ 24946:c44534209a0a
bookmarks: rename readcurrent to readactive (API)
Today, the terms 'active' and 'current' are interchangeably used throughout the
codebase in reference to the active bookmark (the bookmark that will be updated
with the next commit). This leads to confusion among developers and users.
This patch is part of a series to standardize the usage to 'active' throughout
the mercurial codebase and user interface.
author | Ryan McElroy <rmcelroy@fb.com> |
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date | Mon, 13 Apr 2015 23:03:13 -0700 |
parents | fb6cb1b82f4f |
children | e6e7d1cce04d |
rev | line source |
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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 import imp, os |
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9 import util, cmdutil, error |
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10 from i18n import _, gettext |
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11 |
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12 _extensions = {} |
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13 _aftercallbacks = {} |
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14 _order = [] |
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15 _ignore = ['hbisect', 'bookmarks', 'parentrevspec', 'interhg', 'inotify'] |
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16 |
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17 def extensions(ui=None): |
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18 if ui: |
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19 def enabled(name): |
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20 for format in ['%s', 'hgext.%s']: |
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21 conf = ui.config('extensions', format % name) |
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22 if conf is not None and not conf.startswith('!'): |
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23 return True |
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24 else: |
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25 enabled = lambda name: True |
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26 for name in _order: |
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27 module = _extensions[name] |
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28 if module and enabled(name): |
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29 yield name, module |
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30 |
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31 def find(name): |
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32 '''return module with given extension name''' |
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33 mod = None |
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34 try: |
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35 mod = _extensions[name] |
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36 except KeyError: |
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37 for k, v in _extensions.iteritems(): |
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38 if k.endswith('.' + name) or k.endswith('/' + name): |
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39 mod = v |
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40 break |
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41 if not mod: |
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42 raise KeyError(name) |
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43 return mod |
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44 |
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45 def loadpath(path, module_name): |
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46 module_name = module_name.replace('.', '_') |
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47 path = util.normpath(util.expandpath(path)) |
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48 if os.path.isdir(path): |
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49 # module/__init__.py style |
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50 d, f = os.path.split(path) |
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51 fd, fpath, desc = imp.find_module(f, [d]) |
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52 return imp.load_module(module_name, fd, fpath, desc) |
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53 else: |
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54 try: |
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55 return imp.load_source(module_name, path) |
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56 except IOError, exc: |
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57 if not exc.filename: |
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58 exc.filename = path # python does not fill this |
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59 raise |
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60 |
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61 def load(ui, name, path): |
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62 if name.startswith('hgext.') or name.startswith('hgext/'): |
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63 shortname = name[6:] |
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64 else: |
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65 shortname = name |
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66 if shortname in _ignore: |
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67 return None |
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68 if shortname in _extensions: |
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69 return _extensions[shortname] |
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70 _extensions[shortname] = None |
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71 if path: |
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72 # the module will be loaded in sys.modules |
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73 # choose an unique name so that it doesn't |
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74 # conflicts with other modules |
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75 mod = loadpath(path, 'hgext.%s' % name) |
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76 else: |
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77 def importh(name): |
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78 mod = __import__(name) |
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79 components = name.split('.') |
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80 for comp in components[1:]: |
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81 mod = getattr(mod, comp) |
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82 return mod |
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83 try: |
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84 mod = importh("hgext.%s" % name) |
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85 except ImportError, err: |
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86 ui.debug('could not import hgext.%s (%s): trying %s\n' |
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87 % (name, err, name)) |
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88 mod = importh(name) |
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89 _extensions[shortname] = mod |
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90 _order.append(shortname) |
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91 for fn in _aftercallbacks.get(shortname, []): |
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92 fn(loaded=True) |
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93 return mod |
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94 |
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95 def loadall(ui): |
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96 result = ui.configitems("extensions") |
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97 newindex = len(_order) |
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98 for (name, path) in result: |
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99 if path: |
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100 if path[0] == '!': |
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101 continue |
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102 try: |
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103 load(ui, name, path) |
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104 except KeyboardInterrupt: |
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105 raise |
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106 except Exception, inst: |
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107 if path: |
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108 ui.warn(_("*** failed to import extension %s from %s: %s\n") |
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109 % (name, path, inst)) |
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110 else: |
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111 ui.warn(_("*** failed to import extension %s: %s\n") |
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112 % (name, inst)) |
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113 |
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114 for name in _order[newindex:]: |
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115 uisetup = getattr(_extensions[name], 'uisetup', None) |
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116 if uisetup: |
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117 uisetup(ui) |
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118 |
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119 for name in _order[newindex:]: |
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120 extsetup = getattr(_extensions[name], 'extsetup', None) |
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121 if extsetup: |
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122 try: |
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123 extsetup(ui) |
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124 except TypeError: |
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125 if extsetup.func_code.co_argcount != 0: |
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126 raise |
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127 extsetup() # old extsetup with no ui argument |
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128 |
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129 # Call aftercallbacks that were never met. |
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130 for shortname in _aftercallbacks: |
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131 if shortname in _extensions: |
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132 continue |
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133 |
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134 for fn in _aftercallbacks[shortname]: |
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135 fn(loaded=False) |
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136 |
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137 def afterloaded(extension, callback): |
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138 '''Run the specified function after a named extension is loaded. |
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139 |
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140 If the named extension is already loaded, the callback will be called |
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141 immediately. |
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142 |
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143 If the named extension never loads, the callback will be called after |
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144 all extensions have been loaded. |
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145 |
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146 The callback receives the named argument ``loaded``, which is a boolean |
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147 indicating whether the dependent extension actually loaded. |
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148 ''' |
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149 |
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150 if extension in _extensions: |
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151 callback(loaded=True) |
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152 else: |
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153 _aftercallbacks.setdefault(extension, []).append(callback) |
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154 |
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155 def bind(func, *args): |
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156 '''Partial function application |
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157 |
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158 Returns a new function that is the partial application of args and kwargs |
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159 to func. For example, |
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160 |
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161 f(1, 2, bar=3) === bind(f, 1)(2, bar=3)''' |
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162 assert callable(func) |
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163 def closure(*a, **kw): |
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164 return func(*(args + a), **kw) |
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165 return closure |
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166 |
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167 def wrapcommand(table, command, wrapper, synopsis=None, docstring=None): |
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168 '''Wrap the command named `command' in table |
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169 |
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170 Replace command in the command table with wrapper. The wrapped command will |
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171 be inserted into the command table specified by the table argument. |
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172 |
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173 The wrapper will be called like |
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174 |
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175 wrapper(orig, *args, **kwargs) |
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176 |
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177 where orig is the original (wrapped) function, and *args, **kwargs |
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178 are the arguments passed to it. |
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179 |
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180 Optionally append to the command synopsis and docstring, used for help. |
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181 For example, if your extension wraps the ``bookmarks`` command to add the |
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182 flags ``--remote`` and ``--all`` you might call this function like so: |
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183 |
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184 synopsis = ' [-a] [--remote]' |
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185 docstring = """ |
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186 |
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187 The ``remotenames`` extension adds the ``--remote`` and ``--all`` (``-a``) |
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188 flags to the bookmarks command. Either flag will show the remote bookmarks |
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189 known to the repository; ``--remote`` will also supress the output of the |
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190 local bookmarks. |
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191 """ |
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192 |
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193 extensions.wrapcommand(commands.table, 'bookmarks', exbookmarks, |
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194 synopsis, docstring) |
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195 ''' |
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196 assert callable(wrapper) |
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197 aliases, entry = cmdutil.findcmd(command, table) |
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198 for alias, e in table.iteritems(): |
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199 if e is entry: |
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200 key = alias |
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201 break |
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202 |
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203 origfn = entry[0] |
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204 wrap = bind(util.checksignature(wrapper), util.checksignature(origfn)) |
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205 |
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206 wrap.__module__ = getattr(origfn, '__module__') |
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207 |
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208 doc = getattr(origfn, '__doc__') |
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209 if docstring is not None: |
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210 doc += docstring |
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211 wrap.__doc__ = doc |
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212 |
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213 newentry = list(entry) |
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214 newentry[0] = wrap |
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215 if synopsis is not None: |
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216 newentry[2] += synopsis |
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217 table[key] = tuple(newentry) |
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218 return entry |
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219 |
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220 def wrapfunction(container, funcname, wrapper): |
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221 '''Wrap the function named funcname in container |
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222 |
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223 Replace the funcname member in the given container with the specified |
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224 wrapper. The container is typically a module, class, or instance. |
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225 |
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226 The wrapper will be called like |
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227 |
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228 wrapper(orig, *args, **kwargs) |
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229 |
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230 where orig is the original (wrapped) function, and *args, **kwargs |
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231 are the arguments passed to it. |
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232 |
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233 Wrapping methods of the repository object is not recommended since |
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234 it conflicts with extensions that extend the repository by |
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235 subclassing. All extensions that need to extend methods of |
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236 localrepository should use this subclassing trick: namely, |
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237 reposetup() should look like |
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238 |
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239 def reposetup(ui, repo): |
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240 class myrepo(repo.__class__): |
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241 def whatever(self, *args, **kwargs): |
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242 [...extension stuff...] |
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243 super(myrepo, self).whatever(*args, **kwargs) |
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244 [...extension stuff...] |
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245 |
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246 repo.__class__ = myrepo |
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247 |
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248 In general, combining wrapfunction() with subclassing does not |
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249 work. Since you cannot control what other extensions are loaded by |
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250 your end users, you should play nicely with others by using the |
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251 subclass trick. |
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252 ''' |
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253 assert callable(wrapper) |
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254 |
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255 origfn = getattr(container, funcname) |
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256 assert callable(origfn) |
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257 setattr(container, funcname, bind(wrapper, origfn)) |
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258 return origfn |
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259 |
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260 def _disabledpaths(strip_init=False): |
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261 '''find paths of disabled extensions. returns a dict of {name: path} |
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262 removes /__init__.py from packages if strip_init is True''' |
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263 import hgext |
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264 extpath = os.path.dirname(os.path.abspath(hgext.__file__)) |
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265 try: # might not be a filesystem path |
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266 files = os.listdir(extpath) |
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267 except OSError: |
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268 return {} |
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269 |
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270 exts = {} |
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271 for e in files: |
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272 if e.endswith('.py'): |
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273 name = e.rsplit('.', 1)[0] |
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274 path = os.path.join(extpath, e) |
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275 else: |
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276 name = e |
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277 path = os.path.join(extpath, e, '__init__.py') |
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278 if not os.path.exists(path): |
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279 continue |
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280 if strip_init: |
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281 path = os.path.dirname(path) |
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282 if name in exts or name in _order or name == '__init__': |
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283 continue |
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284 exts[name] = path |
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285 return exts |
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286 |
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287 def _moduledoc(file): |
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288 '''return the top-level python documentation for the given file |
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289 |
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290 Loosely inspired by pydoc.source_synopsis(), but rewritten to |
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291 handle triple quotes and to return the whole text instead of just |
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292 the synopsis''' |
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293 result = [] |
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294 |
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295 line = file.readline() |
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296 while line[:1] == '#' or not line.strip(): |
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297 line = file.readline() |
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298 if not line: |
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299 break |
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300 |
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301 start = line[:3] |
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302 if start == '"""' or start == "'''": |
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303 line = line[3:] |
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304 while line: |
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305 if line.rstrip().endswith(start): |
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306 line = line.split(start)[0] |
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307 if line: |
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308 result.append(line) |
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309 break |
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310 elif not line: |
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311 return None # unmatched delimiter |
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312 result.append(line) |
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313 line = file.readline() |
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314 else: |
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315 return None |
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316 |
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317 return ''.join(result) |
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318 |
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319 def _disabledhelp(path): |
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320 '''retrieve help synopsis of a disabled extension (without importing)''' |
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321 try: |
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322 file = open(path) |
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323 except IOError: |
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324 return |
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325 else: |
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326 doc = _moduledoc(file) |
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327 file.close() |
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328 |
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329 if doc: # extracting localized synopsis |
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330 return gettext(doc).splitlines()[0] |
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331 else: |
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332 return _('(no help text available)') |
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333 |
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334 def disabled(): |
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335 '''find disabled extensions from hgext. returns a dict of {name: desc}''' |
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336 try: |
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337 from hgext import __index__ |
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338 return dict((name, gettext(desc)) |
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339 for name, desc in __index__.docs.iteritems() |
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340 if name not in _order) |
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341 except (ImportError, AttributeError): |
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342 pass |
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343 |
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344 paths = _disabledpaths() |
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345 if not paths: |
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346 return {} |
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347 |
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348 exts = {} |
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349 for name, path in paths.iteritems(): |
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350 doc = _disabledhelp(path) |
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351 if doc: |
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352 exts[name] = doc |
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353 |
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354 return exts |
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355 |
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356 def disabledext(name): |
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357 '''find a specific disabled extension from hgext. returns desc''' |
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358 try: |
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359 from hgext import __index__ |
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360 if name in _order: # enabled |
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361 return |
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362 else: |
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363 return gettext(__index__.docs.get(name)) |
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364 except (ImportError, AttributeError): |
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365 pass |
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366 |
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367 paths = _disabledpaths() |
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368 if name in paths: |
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369 return _disabledhelp(paths[name]) |
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370 |
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371 def disabledcmd(ui, cmd, strict=False): |
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372 '''import disabled extensions until cmd is found. |
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373 returns (cmdname, extname, module)''' |
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374 |
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375 paths = _disabledpaths(strip_init=True) |
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376 if not paths: |
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377 raise error.UnknownCommand(cmd) |
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378 |
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379 def findcmd(cmd, name, path): |
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380 try: |
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381 mod = loadpath(path, 'hgext.%s' % name) |
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382 except Exception: |
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383 return |
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384 try: |
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385 aliases, entry = cmdutil.findcmd(cmd, |
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386 getattr(mod, 'cmdtable', {}), strict) |
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387 except (error.AmbiguousCommand, error.UnknownCommand): |
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388 return |
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389 except Exception: |
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390 ui.warn(_('warning: error finding commands in %s\n') % path) |
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391 ui.traceback() |
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392 return |
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393 for c in aliases: |
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394 if c.startswith(cmd): |
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395 cmd = c |
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396 break |
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397 else: |
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398 cmd = aliases[0] |
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399 return (cmd, name, mod) |
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400 |
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401 ext = None |
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402 # first, search for an extension with the same name as the command |
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403 path = paths.pop(cmd, None) |
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404 if path: |
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405 ext = findcmd(cmd, cmd, path) |
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406 if not ext: |
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407 # otherwise, interrogate each extension until there's a match |
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408 for name, path in paths.iteritems(): |
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409 ext = findcmd(cmd, name, path) |
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410 if ext: |
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411 break |
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412 if ext and 'DEPRECATED' not in ext.__doc__: |
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413 return ext |
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414 |
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415 raise error.UnknownCommand(cmd) |
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416 |
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417 def enabled(shortname=True): |
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418 '''return a dict of {name: desc} of extensions''' |
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419 exts = {} |
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420 for ename, ext in extensions(): |
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421 doc = (gettext(ext.__doc__) or _('(no help text available)')) |
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422 if shortname: |
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423 ename = ename.split('.')[-1] |
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424 exts[ename] = doc.splitlines()[0].strip() |
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425 |
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426 return exts |
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427 |
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428 def moduleversion(module): |
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429 '''return version information from given module as a string''' |
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430 if (util.safehasattr(module, 'getversion') |
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431 and callable(module.getversion)): |
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432 version = module.getversion() |
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433 elif util.safehasattr(module, '__version__'): |
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434 version = module.__version__ |
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435 else: |
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436 version = '' |
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437 if isinstance(version, (list, tuple)): |
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438 version = '.'.join(str(o) for o in version) |
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439 return version |