Mercurial > hg
view mercurial/hook.py @ 20208:61a47fd64f30 stable
fileset, revset: do not use global parser object for thread safety
parse() cannot be called at the same time because a parser object keeps its
states. This is no problem for command-line hg client, but it would cause
strange errors in multi-threaded hgweb.
Creating parser object is not too expensive.
original:
% python -m timeit -s 'from mercurial import revset' 'revset.parse("0::tip")'
100000 loops, best of 3: 11.3 usec per loop
thread-safe:
% python -m timeit -s 'from mercurial import revset' 'revset.parse("0::tip")'
100000 loops, best of 3: 13.1 usec per loop
author | Yuya Nishihara <yuya@tcha.org> |
---|---|
date | Sat, 21 Dec 2013 12:44:19 +0900 |
parents | 4f485bd68f1d |
children | aac87f70f38e |
line wrap: on
line source
# 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 or any later version. from i18n import _ import os, sys, time, types import extensions, util, demandimport 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)) starttime = time.time() obj = funcname if not util.safehasattr(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] oldpaths = sys.path if util.mainfrozen(): # binary installs require sys.path manipulation modpath, modfile = os.path.split(modname) if modpath and modfile: sys.path = sys.path[:] + [modpath] modname = modfile try: demandimport.disable() obj = __import__(modname) demandimport.enable() except ImportError: e1 = sys.exc_type, sys.exc_value, sys.exc_traceback try: # extensions are loaded with hgext_ prefix obj = __import__("hgext_%s" % modname) demandimport.enable() except ImportError: demandimport.enable() e2 = sys.exc_type, sys.exc_value, sys.exc_traceback if ui.tracebackflag: ui.warn(_('exception from first failed import attempt:\n')) ui.traceback(e1) if ui.tracebackflag: ui.warn(_('exception from second failed import attempt:\n')) ui.traceback(e2) raise util.Abort(_('%s hook is invalid ' '(import of "%s" failed)') % (hname, modname)) sys.path = oldpaths 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 util.safehasattr(obj, '__call__'): raise util.Abort(_('%s hook is invalid ' '("%s" is not callable)') % (hname, funcname)) try: try: # redirect IO descriptors to the ui descriptors so hooks # that write directly to these don't mess up the command # protocol when running through the command server old = sys.stdout, sys.stderr, sys.stdin sys.stdout, sys.stderr, sys.stdin = ui.fout, ui.ferr, ui.fin 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 finally: sys.stdout, sys.stderr, sys.stdin = old duration = time.time() - starttime readablefunc = funcname if isinstance(funcname, types.FunctionType): readablefunc = funcname.__module__ + "." + funcname.__name__ ui.log('pythonhook', 'pythonhook-%s: %s finished in %0.2f seconds\n', name, readablefunc, duration) 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)) starttime = time.time() env = {} for k, v in args.iteritems(): if util.safehasattr(v, '__call__'): v = v() if isinstance(v, dict): # make the dictionary element order stable across Python # implementations v = ('{' + ', '.join('%r: %r' % i for i in sorted(v.iteritems())) + '}') env['HG_' + k.upper()] = v if repo: cwd = repo.root else: cwd = os.getcwd() if 'HG_URL' in env and env['HG_URL'].startswith('remote:http'): r = util.system(cmd, environ=env, cwd=cwd, out=ui) else: r = util.system(cmd, environ=env, cwd=cwd, out=ui.fout) duration = time.time() - starttime ui.log('exthook', 'exthook-%s: %s finished in %0.2f seconds\n', name, cmd, duration) if r: desc, r = util.explainexit(r) if throw: raise util.Abort(_('%s hook %s') % (name, desc)) ui.warn(_('warning: %s hook %s\n') % (name, desc)) return r def _allhooks(ui): hooks = [] for name, cmd in ui.configitems('hooks'): if not name.startswith('priority'): priority = ui.configint('hooks', 'priority.%s' % name, 0) hooks.append((-priority, len(hooks), name, cmd)) return [(k, v) for p, o, k, v in sorted(hooks)] _redirect = False def redirect(state): global _redirect _redirect = state def hook(ui, repo, name, throw=False, **args): if not ui.callhooks: return False r = False oldstdout = -1 try: for hname, cmd in _allhooks(ui): if hname.split('.')[0] != name or not cmd: continue if oldstdout == -1 and _redirect: try: stdoutno = sys.__stdout__.fileno() stderrno = sys.__stderr__.fileno() # temporarily redirect stdout to stderr, if possible if stdoutno >= 0 and stderrno >= 0: sys.__stdout__.flush() oldstdout = os.dup(stdoutno) os.dup2(stderrno, stdoutno) except (OSError, AttributeError): # files seem to be bogus, give up on redirecting (WSGI, etc) pass if util.safehasattr(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:].rsplit(':', 1) path = util.expandpath(path) if repo: path = os.path.join(repo.root, path) try: mod = extensions.loadpath(path, 'hghook.%s' % hname) except Exception: ui.write(_("loading %s hook failed:\n") % hname) raise 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 and oldstdout >= 0: os.dup2(oldstdout, stdoutno) os.close(oldstdout) return r