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dispatch: also pass level argument to __import__ for ignored modules...
dispatch: also pass level argument to __import__ for ignored modules I wanted to check if mercurial.demandimport could speed up the loading of PyObjC, and ran into this: the level argument for __import__, available in Python 2.5 and later, is silently dropped when doing an 'import *'. I have no idea what these arguments mean, but this minor change made it work. (Oh, and because of that 'from ... import *', PyObjC still took about 2s...)

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hook.py
127 lines | 4.3 KiB | text/x-python | PythonLexer
# hook.py - hook support for mercurial
#
# Copyright 2007 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2, incorporated herein by reference.
from i18n import _
import os, sys
import extensions, util
def _pythonhook(ui, repo, name, hname, funcname, args, throw):
'''call python hook. hook is callable object, looked up as
name in python module. if callable returns "true", hook
fails, else passes. if hook raises exception, treated as
hook failure. exception propagates if throw is "true".
reason for "true" meaning "hook failed" is so that
unmodified commands (e.g. mercurial.commands.update) can
be run as hooks without wrappers to convert return values.'''
ui.note(_("calling hook %s: %s\n") % (hname, funcname))
obj = funcname
if not hasattr(obj, '__call__'):
d = funcname.rfind('.')
if d == -1:
raise util.Abort(_('%s hook is invalid ("%s" not in '
'a module)') % (hname, funcname))
modname = funcname[:d]
try:
obj = __import__(modname)
except ImportError:
try:
# extensions are loaded with hgext_ prefix
obj = __import__("hgext_%s" % modname)
except ImportError:
raise util.Abort(_('%s hook is invalid '
'(import of "%s" failed)') %
(hname, modname))
try:
for p in funcname.split('.')[1:]:
obj = getattr(obj, p)
except AttributeError:
raise util.Abort(_('%s hook is invalid '
'("%s" is not defined)') %
(hname, funcname))
if not hasattr(obj, '__call__'):
raise util.Abort(_('%s hook is invalid '
'("%s" is not callable)') %
(hname, funcname))
try:
r = obj(ui=ui, repo=repo, hooktype=name, **args)
except KeyboardInterrupt:
raise
except Exception, exc:
if isinstance(exc, util.Abort):
ui.warn(_('error: %s hook failed: %s\n') %
(hname, exc.args[0]))
else:
ui.warn(_('error: %s hook raised an exception: '
'%s\n') % (hname, exc))
if throw:
raise
ui.traceback()
return True
if r:
if throw:
raise util.Abort(_('%s hook failed') % hname)
ui.warn(_('warning: %s hook failed\n') % hname)
return r
def _exthook(ui, repo, name, cmd, args, throw):
ui.note(_("running hook %s: %s\n") % (name, cmd))
env = {}
for k, v in args.iteritems():
if hasattr(v, '__call__'):
v = v()
env['HG_' + k.upper()] = v
if repo:
cwd = repo.root
else:
cwd = os.getcwd()
r = util.system(cmd, environ=env, cwd=cwd)
if r:
desc, r = util.explain_exit(r)
if throw:
raise util.Abort(_('%s hook %s') % (name, desc))
ui.warn(_('warning: %s hook %s\n') % (name, desc))
return r
_redirect = False
def redirect(state):
global _redirect
_redirect = state
def hook(ui, repo, name, throw=False, **args):
r = False
if _redirect:
# temporarily redirect stdout to stderr
oldstdout = os.dup(sys.__stdout__.fileno())
os.dup2(sys.__stderr__.fileno(), sys.__stdout__.fileno())
try:
for hname, cmd in ui.configitems('hooks'):
if hname.split('.')[0] != name or not cmd:
continue
if hasattr(cmd, '__call__'):
r = _pythonhook(ui, repo, name, hname, cmd, args, throw) or r
elif cmd.startswith('python:'):
if cmd.count(':') == 2:
path, cmd = cmd[7:].split(':')
mod = extensions.loadpath(path, 'hgkook.%s' % hname)
hookfn = getattr(mod, cmd)
else:
hookfn = cmd[7:].strip()
r = _pythonhook(ui, repo, name, hname, hookfn, args, throw) or r
else:
r = _exthook(ui, repo, hname, cmd, args, throw) or r
finally:
if _redirect:
os.dup2(oldstdout, sys.__stdout__.fileno())
os.close(oldstdout)
return r