Mercurial > hg > mercurial-crew-with-dirclash
view mercurial/hook.py @ 5366:d0c48891dd4a
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author | Matt Mackall <mpm@selenic.com> |
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date | Thu, 27 Sep 2007 23:59:18 -0500 |
parents | fff50306e6dd |
children |
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# 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, incorporated herein by reference. from i18n import _ import 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 callable(obj): 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, err: raise util.Abort(_('%s hook is invalid ' '("%s" is not defined)') % (hname, funcname)) if not callable(obj): 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, util.SignalInterrupt): 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.print_exc() 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 = dict([('HG_' + k.upper(), v) for k, v in args.iteritems()]) r = util.system(cmd, environ=env, cwd=repo.root) 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 def hook(ui, repo, name, throw=False, **args): r = False hooks = [(hname, cmd) for hname, cmd in ui.configitems("hooks") if hname.split(".", 1)[0] == name and cmd] hooks.sort() for hname, cmd in hooks: if callable(cmd): r = _pythonhook(ui, repo, name, hname, cmd, args, throw) or r elif cmd.startswith('python:'): r = _pythonhook(ui, repo, name, hname, cmd[7:].strip(), args, throw) or r else: r = _exthook(ui, repo, hname, cmd, args, throw) or r return r