Mercurial > hg > mercurial-crew-with-dirclash

annotate mercurial/extensions.py @ 4819:616a5adbf402

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extensions: untangle some recursive dependencies
author Matt Mackall <mpm@selenic.com>
date Thu, 05 Jul 2007 15:37:23 -0500
parents 63b9d2deed48
children af0995261f02
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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
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6 # of the GNU General Public License, incorporated herein by reference.
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7
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8 import imp, os
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9 import util, sys
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10 from i18n import _
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11
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12 _extensions = {}
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13 commandtable = {}
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14 setuphooks = []
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15
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16 def find(name):
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17 '''return module with given extension name'''
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18 try:
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19 return _extensions[name]
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20 except KeyError:
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21 for k, v in _extensions.iteritems():
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22 if k.endswith('.' + name) or k.endswith('/' + name):
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23 return v
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24 raise KeyError(name)
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25
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26 def load(ui, name, path):
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27 if name in _extensions:
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28 return
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29 if path:
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30 # the module will be loaded in sys.modules
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31 # choose an unique name so that it doesn't
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32 # conflicts with other modules
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33 module_name = "hgext_%s" % name.replace('.', '_')
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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)
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37 fd, fpath, desc = imp.find_module(f, [d])
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38 mod = imp.load_module(module_name, fd, fpath, desc)
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39 else:
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40 mod = imp.load_source(module_name, path)
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41 else:
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42 def importh(name):
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43 mod = __import__(name)
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44 components = name.split('.')
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45 for comp in components[1:]:
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46 mod = getattr(mod, comp)
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47 return mod
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48 try:
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49 mod = importh("hgext.%s" % name)
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50 except ImportError:
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51 mod = importh(name)
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52 _extensions[name] = mod
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53
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54 uisetup = getattr(mod, 'uisetup', None)
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55 if uisetup:
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56 uisetup(ui)
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57 reposetup = getattr(mod, 'reposetup', None)
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58 if reposetup:
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59 setuphooks.append(reposetup)
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60 cmdtable = getattr(mod, 'cmdtable', {})
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61 overrides = [cmd for cmd in cmdtable if cmd in commandtable]
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62 if overrides:
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63 ui.warn(_("extension '%s' overrides commands: %s\n")
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64 % (name, " ".join(overrides)))
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65 commandtable.update(cmdtable)
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66
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67 def loadall(ui):
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68 result = ui.configitems("extensions")
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69 for i, (name, path) in enumerate(result):
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70 if path:
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71 path = os.path.expanduser(path)
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72 try:
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73 load(ui, name, path)
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74 except (util.SignalInterrupt, KeyboardInterrupt):
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75 raise
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76 except Exception, inst:
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77 ui.warn(_("*** failed to import extension %s: %s\n") %
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78 (name, inst))
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79 if ui.print_exc():
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80 return 1
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81