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comparison mercurial/extensions.py @ 4544:930ed513c864

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Create a separate module for managing extensions
author Matt Mackall <mpm@selenic.com>
date Mon, 11 Jun 2007 21:09:23 -0500
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children 9338be783398
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4543:6b4e8a75d5fc 4544:930ed513c864
1 # extensions.py - extension handling for mercurial
2 #
3 # Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>
4 #
5 # This software may be used and distributed according to the terms
6 # of the GNU General Public License, incorporated herein by reference.
7
8 import imp, commands, hg, util
9 from i18n import _
10
11 _extensions = {}
12
13 def find(name):
14 '''return module with given extension name'''
15 try:
16 return _extensions[name]
17 except KeyError:
18 for k, v in _extensions.iteritems():
19 if k.endswith('.' + name) or k.endswith('/' + name) or v == name:
20 return sys.modules[v]
21 raise KeyError(name)
22
23 def load(ui, name, path):
24 if name in _extensions:
25 return
26 if path:
27 # the module will be loaded in sys.modules
28 # choose an unique name so that it doesn't
29 # conflicts with other modules
30 module_name = "hgext_%s" % name.replace('.', '_')
31 mod = imp.load_source(module_name, path)
32 else:
33 def importh(name):
34 mod = __import__(name)
35 components = name.split('.')
36 for comp in components[1:]:
37 mod = getattr(mod, comp)
38 return mod
39 try:
40 mod = importh("hgext.%s" % name)
41 except ImportError:
42 mod = importh(name)
43 _extensions[name] = mod
44
45 uisetup = getattr(mod, 'uisetup', None)
46 if uisetup:
47 uisetup(ui)
48 reposetup = getattr(mod, 'reposetup', None)
49 if reposetup:
50 hg.repo_setup_hooks.append(reposetup)
51 cmdtable = getattr(mod, 'cmdtable', {})
52 overrides = [cmd for cmd in cmdtable if cmd in commands.table]
53 if overrides:
54 ui.warn(_("extension '%s' overrides commands: %s\n")
55 % (name, " ".join(overrides)))
56 commands.table.update(cmdtable)
57
58 def loadall(ui):
59 for name, path in ui.extensions():
60 try:
61 load(ui, name, path)
62 except (util.SignalInterrupt, KeyboardInterrupt):
63 raise
64 except Exception, inst:
65 ui.warn(_("*** failed to import extension %s: %s\n") %
66 (name, inst))
67 if ui.print_exc():
68 return 1
69