Mercurial > public > mercurial-scm > hg-stable

annotate mercurial/extensions.py @ 12779:891ddf76b73e

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extensions.load: return module Makes extensions.load return the module that it has loaded. This is done so that callers can get information on this module, which e.g. can be used for generating docs.
author Erik Zielke <ez@aragost.com>
date Tue, 19 Oct 2010 13:43:40 +0200
parents 3efadce5b346
children 1aea66b71f4f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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
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6 # GNU General Public License version 2 or any later version.
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7
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8 import imp, os
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9 import util, cmdutil, help, 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 _order = []
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14
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15 def extensions():
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16 for name in _order:
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17 module = _extensions[name]
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18 if module:
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19 yield name, module
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20
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21 def find(name):
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22 '''return module with given extension name'''
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23 try:
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24 return _extensions[name]
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25 except KeyError:
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26 for k, v in _extensions.iteritems():
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27 if k.endswith('.' + name) or k.endswith('/' + name):
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28 return v
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29 raise KeyError(name)
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30
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31 def loadpath(path, module_name):
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32 module_name = module_name.replace('.', '_')
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33 path = util.expandpath(path)
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34 if os.path.isdir(path):
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35 # module/__init__.py style
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36 d, f = os.path.split(path.rstrip('/'))
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37 fd, fpath, desc = imp.find_module(f, [d])
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38 return imp.load_module(module_name, fd, fpath, desc)
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39 else:
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40 return imp.load_source(module_name, path)
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41
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42 def load(ui, name, path):
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43 # unused ui argument kept for backwards compatibility
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44 if name.startswith('hgext.') or name.startswith('hgext/'):
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45 shortname = name[6:]
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46 else:
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47 shortname = name
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48 if shortname in _extensions:
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49 return _extensions[shortname]
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50 _extensions[shortname] = None
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51 if path:
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52 # the module will be loaded in sys.modules
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53 # choose an unique name so that it doesn't
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54 # conflicts with other modules
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55 mod = loadpath(path, 'hgext.%s' % name)
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56 else:
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57 def importh(name):
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58 mod = __import__(name)
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59 components = name.split('.')
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60 for comp in components[1:]:
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61 mod = getattr(mod, comp)
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62 return mod
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63 try:
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64 mod = importh("hgext.%s" % name)
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65 except ImportError:
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66 mod = importh(name)
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67 _extensions[shortname] = mod
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68 _order.append(shortname)
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69 return mod
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70
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71 def loadall(ui):
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72 result = ui.configitems("extensions")
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73 newindex = len(_order)
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74 for (name, path) in result:
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75 if path:
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76 if path[0] == '!':
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77 continue
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78 try:
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79 load(ui, name, path)
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80 except KeyboardInterrupt:
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81 raise
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82 except Exception, inst:
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83 if path:
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84 ui.warn(_("*** failed to import extension %s from %s: %s\n")
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85 % (name, path, inst))
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86 else:
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87 ui.warn(_("*** failed to import extension %s: %s\n")
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88 % (name, inst))
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89 if ui.traceback():
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90 return 1
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91
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92 for name in _order[newindex:]:
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93 uisetup = getattr(_extensions[name], 'uisetup', None)
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94 if uisetup:
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95 uisetup(ui)
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96
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97 for name in _order[newindex:]:
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98 extsetup = getattr(_extensions[name], 'extsetup', None)
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99 if extsetup:
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100 try:
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101 extsetup(ui)
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102 except TypeError:
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103 if extsetup.func_code.co_argcount != 0:
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104 raise
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105 extsetup() # old extsetup with no ui argument
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106
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107 def wrapcommand(table, command, wrapper):
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108 '''Wrap the command named `command' in table
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109
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110 Replace command in the command table with wrapper. The wrapped command will
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111 be inserted into the command table specified by the table argument.
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112
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113 The wrapper will be called like
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114
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115 wrapper(orig, *args, **kwargs)
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116
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117 where orig is the original (wrapped) function, and *args, **kwargs
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118 are the arguments passed to it.
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119 '''
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120 assert hasattr(wrapper, '__call__')
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121 aliases, entry = cmdutil.findcmd(command, table)
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122 for alias, e in table.iteritems():
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123 if e is entry:
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124 key = alias
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125 break
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126
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127 origfn = entry[0]
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128 def wrap(*args, **kwargs):
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129 return util.checksignature(wrapper)(
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130 util.checksignature(origfn), *args, **kwargs)
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131
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132 wrap.__doc__ = getattr(origfn, '__doc__')
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133 wrap.__module__ = getattr(origfn, '__module__')
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134
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135 newentry = list(entry)
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136 newentry[0] = wrap
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137 table[key] = tuple(newentry)
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138 return entry
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139
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140 def wrapfunction(container, funcname, wrapper):
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141 '''Wrap the function named funcname in container
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142
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diff changeset
143 Replace the funcname member in the given container with the specified
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diff changeset
144 wrapper. The container is typically a module, class, or instance.
11402
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diff changeset
145
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diff changeset
146 The wrapper will be called like
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diff changeset
147
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diff changeset
148 wrapper(orig, *args, **kwargs)
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diff changeset
149
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diff changeset
150 where orig is the original (wrapped) function, and *args, **kwargs
367ce8514da0 extensions: recommend against using wrapfunction for repo methods
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diff changeset
151 are the arguments passed to it.
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diff changeset
152
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diff changeset
153 Wrapping methods of the repository object is not recommended since
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diff changeset
154 it conflicts with extensions that extend the repository by
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diff changeset
155 subclassing. All extensions that need to extend methods of
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diff changeset
156 localrepository should use this subclassing trick: namely,
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diff changeset
157 reposetup() should look like
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diff changeset
158
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diff changeset
159 def reposetup(ui, repo):
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diff changeset
160 class myrepo(repo.__class__):
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diff changeset
161 def whatever(self, *args, **kwargs):
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diff changeset
162 [...extension stuff...]
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diff changeset
163 super(myrepo, self).whatever(*args, **kwargs)
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diff changeset
164 [...extension stuff...]
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diff changeset
165
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diff changeset
166 repo.__class__ = myrepo
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167
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diff changeset
168 In general, combining wrapfunction() with subclassing does not
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diff changeset
169 work. Since you cannot control what other extensions are loaded by
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diff changeset
170 your end users, you should play nicely with others by using the
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171 subclass trick.
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172 '''
11521
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173 assert hasattr(wrapper, '__call__')
7215
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diff changeset
174 def wrap(*args, **kwargs):
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diff changeset
175 return wrapper(origfn, *args, **kwargs)
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diff changeset
176
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diff changeset
177 origfn = getattr(container, funcname)
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178 assert hasattr(origfn, '__call__')
7215
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179 setattr(container, funcname, wrap)
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180 return origfn
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181
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182 def _disabledpaths(strip_init=False):
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183 '''find paths of disabled extensions. returns a dict of {name: path}
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184 removes /__init__.py from packages if strip_init is True'''
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185 import hgext
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186 extpath = os.path.dirname(os.path.abspath(hgext.__file__))
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187 try: # might not be a filesystem path
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188 files = os.listdir(extpath)
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diff changeset
189 except OSError:
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190 return {}
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diff changeset
191
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192 exts = {}
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diff changeset
193 for e in files:
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194 if e.endswith('.py'):
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195 name = e.rsplit('.', 1)[0]
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196 path = os.path.join(extpath, e)
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197 else:
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198 name = e
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diff changeset
199 path = os.path.join(extpath, e, '__init__.py')
8877
08636e18268f extensions: check for path existence only when necessary
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diff changeset
200 if not os.path.exists(path):
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diff changeset
201 continue
10364
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diff changeset
202 if strip_init:
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diff changeset
203 path = os.path.dirname(path)
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diff changeset
204 if name in exts or name in _order or name == '__init__':
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diff changeset
205 continue
c07974215b3d extensions: refactor disabled()
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206 exts[name] = path
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diff changeset
207 return exts
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diff changeset
208
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diff changeset
209 def _disabledhelp(path):
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210 '''retrieve help synopsis of a disabled extension (without importing)'''
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diff changeset
211 try:
c07974215b3d extensions: refactor disabled()
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diff changeset
212 file = open(path)
c07974215b3d extensions: refactor disabled()
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diff changeset
213 except IOError:
c07974215b3d extensions: refactor disabled()
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diff changeset
214 return
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diff changeset
215 else:
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diff changeset
216 doc = help.moduledoc(file)
c07974215b3d extensions: refactor disabled()
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diff changeset
217 file.close()
c07974215b3d extensions: refactor disabled()
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diff changeset
218
c07974215b3d extensions: refactor disabled()
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diff changeset
219 if doc: # extracting localized synopsis
c07974215b3d extensions: refactor disabled()
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diff changeset
220 return gettext(doc).splitlines()[0]
c07974215b3d extensions: refactor disabled()
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diff changeset
221 else:
c07974215b3d extensions: refactor disabled()
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diff changeset
222 return _('(no help text available)')
c07974215b3d extensions: refactor disabled()
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diff changeset
223
c07974215b3d extensions: refactor disabled()
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diff changeset
224 def disabled():
c07974215b3d extensions: refactor disabled()
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diff changeset
225 '''find disabled extensions from hgext
c07974215b3d extensions: refactor disabled()
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diff changeset
226 returns a dict of {name: desc}, and the max name length'''
c07974215b3d extensions: refactor disabled()
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diff changeset
227
c07974215b3d extensions: refactor disabled()
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diff changeset
228 paths = _disabledpaths()
c07974215b3d extensions: refactor disabled()
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diff changeset
229 if not paths:
c07974215b3d extensions: refactor disabled()
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diff changeset
230 return None, 0
c07974215b3d extensions: refactor disabled()
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diff changeset
231
c07974215b3d extensions: refactor disabled()
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diff changeset
232 exts = {}
c07974215b3d extensions: refactor disabled()
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diff changeset
233 maxlength = 0
c07974215b3d extensions: refactor disabled()
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diff changeset
234 for name, path in paths.iteritems():
c07974215b3d extensions: refactor disabled()
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diff changeset
235 doc = _disabledhelp(path)
c07974215b3d extensions: refactor disabled()
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parents: 10263
diff changeset
236 if not doc:
8872
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Dirkjan Ochtman <dirkjan@ochtman.nl>
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diff changeset
237 continue
8871
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diff changeset
238
10363
c07974215b3d extensions: refactor disabled()
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diff changeset
239 exts[name] = doc
8872
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Dirkjan Ochtman <dirkjan@ochtman.nl>
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diff changeset
240 if len(name) > maxlength:
d0c0013f8713 extensions: simplify by selecting primary hgext
Dirkjan Ochtman <dirkjan@ochtman.nl>
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diff changeset
241 maxlength = len(name)
8871
20a25042fadc extensions: move extensions listing functions from mercurial.help
C?dric Duval <cedricduval@free.fr>
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diff changeset
242
20a25042fadc extensions: move extensions listing functions from mercurial.help
C?dric Duval <cedricduval@free.fr>
parents: 8225
diff changeset
243 return exts, maxlength
20a25042fadc extensions: move extensions listing functions from mercurial.help
C?dric Duval <cedricduval@free.fr>
parents: 8225
diff changeset
244
10364
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diff changeset
245 def disabledext(name):
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diff changeset
246 '''find a specific disabled extension from hgext. returns desc'''
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diff changeset
247 paths = _disabledpaths()
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diff changeset
248 if name in paths:
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diff changeset
249 return _disabledhelp(paths[name])
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diff changeset
250
de1e7099d100 dispatch: provide help for disabled extensions and commands
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diff changeset
251 def disabledcmd(cmd, strict=False):
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diff changeset
252 '''import disabled extensions until cmd is found.
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diff changeset
253 returns (cmdname, extname, doc)'''
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diff changeset
254
de1e7099d100 dispatch: provide help for disabled extensions and commands
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diff changeset
255 paths = _disabledpaths(strip_init=True)
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diff changeset
256 if not paths:
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diff changeset
257 raise error.UnknownCommand(cmd)
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diff changeset
258
de1e7099d100 dispatch: provide help for disabled extensions and commands
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diff changeset
259 def findcmd(cmd, name, path):
de1e7099d100 dispatch: provide help for disabled extensions and commands
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diff changeset
260 try:
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diff changeset
261 mod = loadpath(path, 'hgext.%s' % name)
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diff changeset
262 except Exception:
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diff changeset
263 return
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diff changeset
264 try:
de1e7099d100 dispatch: provide help for disabled extensions and commands
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diff changeset
265 aliases, entry = cmdutil.findcmd(cmd,
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diff changeset
266 getattr(mod, 'cmdtable', {}), strict)
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diff changeset
267 except (error.AmbiguousCommand, error.UnknownCommand):
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diff changeset
268 return
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diff changeset
269 for c in aliases:
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diff changeset
270 if c.startswith(cmd):
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diff changeset
271 cmd = c
de1e7099d100 dispatch: provide help for disabled extensions and commands
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diff changeset
272 break
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diff changeset
273 else:
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diff changeset
274 cmd = aliases[0]
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diff changeset
275 return (cmd, name, mod)
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diff changeset
276
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diff changeset
277 # first, search for an extension with the same name as the command
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diff changeset
278 path = paths.pop(cmd, None)
de1e7099d100 dispatch: provide help for disabled extensions and commands
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diff changeset
279 if path:
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diff changeset
280 ext = findcmd(cmd, cmd, path)
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diff changeset
281 if ext:
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diff changeset
282 return ext
de1e7099d100 dispatch: provide help for disabled extensions and commands
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diff changeset
283
de1e7099d100 dispatch: provide help for disabled extensions and commands
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diff changeset
284 # otherwise, interrogate each extension until there's a match
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diff changeset
285 for name, path in paths.iteritems():
de1e7099d100 dispatch: provide help for disabled extensions and commands
Brodie Rao <me+hg@dackz.net>
parents: 10363
diff changeset
286 ext = findcmd(cmd, name, path)
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Brodie Rao <me+hg@dackz.net>
parents: 10363
diff changeset
287 if ext:
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Brodie Rao <me+hg@dackz.net>
parents: 10363
diff changeset
288 return ext
de1e7099d100 dispatch: provide help for disabled extensions and commands
Brodie Rao <me+hg@dackz.net>
parents: 10363
diff changeset
289
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Brodie Rao <me+hg@dackz.net>
parents: 10363
diff changeset
290 raise error.UnknownCommand(cmd)
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Brodie Rao <me+hg@dackz.net>
parents: 10363
diff changeset
291
8871
20a25042fadc extensions: move extensions listing functions from mercurial.help
C?dric Duval <cedricduval@free.fr>
parents: 8225
diff changeset
292 def enabled():
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C?dric Duval <cedricduval@free.fr>
parents: 8225
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293 '''return a dict of {name: desc} of extensions, and the max name length'''
20a25042fadc extensions: move extensions listing functions from mercurial.help
C?dric Duval <cedricduval@free.fr>
parents: 8225
diff changeset
294 exts = {}
20a25042fadc extensions: move extensions listing functions from mercurial.help
C?dric Duval <cedricduval@free.fr>
parents: 8225
diff changeset
295 maxlength = 0
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C?dric Duval <cedricduval@free.fr>
parents: 8225
diff changeset
296 for ename, ext in extensions():
20a25042fadc extensions: move extensions listing functions from mercurial.help
C?dric Duval <cedricduval@free.fr>
parents: 8225
diff changeset
297 doc = (gettext(ext.__doc__) or _('(no help text available)'))
20a25042fadc extensions: move extensions listing functions from mercurial.help
C?dric Duval <cedricduval@free.fr>
parents: 8225
diff changeset
298 ename = ename.split('.')[-1]
20a25042fadc extensions: move extensions listing functions from mercurial.help
C?dric Duval <cedricduval@free.fr>
parents: 8225
diff changeset
299 maxlength = max(len(ename), maxlength)
9136
31177742f54a for calls expecting bool args, pass bool instead of int
Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 9020
diff changeset
300 exts[ename] = doc.splitlines()[0].strip()
8871
20a25042fadc extensions: move extensions listing functions from mercurial.help
C?dric Duval <cedricduval@free.fr>
parents: 8225
diff changeset
301
20a25042fadc extensions: move extensions listing functions from mercurial.help
C?dric Duval <cedricduval@free.fr>
parents: 8225
diff changeset
302 return exts, maxlength