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