mirror of
https://github.com/jlu5/PyLink.git
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Backport the launcher as of commit 8321485315 to 1.3
This adds support for stale PID file checking (#182), as well as the --rehash/--stop/--restart options
This commit is contained in:
James Lu
parent
79ff9f23fb
commit
b5735702f7
157
launcher.py
Normal file
157
launcher.py
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@ -0,0 +1,157 @@
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#!/usr/bin/env python3
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"""
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PyLink IRC Services launcher.
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"""
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import os
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import sys
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import signal
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import time
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from pylinkirc import world, conf, __version__, real_version
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try:
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import psutil
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except ImportError:
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psutil = None
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def main():
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import argparse
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parser = argparse.ArgumentParser(description='Starts an instance of PyLink IRC Services.')
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parser.add_argument('config', help='specifies the path to the config file (defaults to pylink.yml)', nargs='?', default='pylink.yml')
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parser.add_argument("-v", "--version", help="displays the program version and exits", action='store_true')
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parser.add_argument("-c", "--check-pid", help="no-op; kept for compatiblity with PyLink 1.x", action='store_true')
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parser.add_argument("-n", "--no-pid", help="skips generating and checking PID files", action='store_true')
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parser.add_argument("-r", "--restart", help="restarts the PyLink instance with the given config file", action='store_true')
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parser.add_argument("-s", "--stop", help="stops the PyLink instance with the given config file", action='store_true')
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parser.add_argument("-R", "--rehash", help="rehashes the PyLink instance with the given config file", action='store_true')
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args = parser.parse_args()
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if args.version: # Display version and exit
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print('PyLink %s (in VCS: %s)' % (__version__, real_version))
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sys.exit()
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# XXX: repetitive
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elif args.no_pid and (args.restart or args.stop or args.rehash):
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print('ERROR: --no-pid cannot be combined with --restart or --stop')
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sys.exit(1)
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elif args.rehash and os.name != 'posix':
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print('ERROR: Rehashing via the command line is not supported outside Unix.')
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sys.exit(1)
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# FIXME: we can't pass logging on to conf until we set up the config...
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conf.loadConf(args.config)
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from pylinkirc.log import log
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from pylinkirc import classes, utils, coremods
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# Write and check for an existing PID file unless specifically told not to.
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if not args.no_pid:
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pidfile = '%s.pid' % conf.confname
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has_pid = False
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pid = None
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if os.path.exists(pidfile):
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has_pid = True
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if psutil is not None and os.name == 'posix':
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# FIXME: Haven't tested this on other platforms, so not turning it on by default.
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with open(pidfile) as f:
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try:
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pid = int(f.read())
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proc = psutil.Process(pid)
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except psutil.NoSuchProcess: # Process doesn't exist!
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has_pid = False
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log.info("Ignoring stale PID %s from PID file %r: no such process exists.", pid, pidfile)
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else:
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# This PID got reused for something that isn't us?
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if not any('pylink' in arg.lower() for arg in proc.cmdline()):
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log.info("Ignoring stale PID %s from PID file %r: process command line %r is not us", pid, pidfile, proc.cmdline())
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has_pid = False
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if has_pid:
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if args.rehash:
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os.kill(pid, signal.SIGUSR1)
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log.info('OK, rehashed PyLink instance %s (config %r)', pid, args.config)
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sys.exit()
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elif args.stop or args.restart: # Handle --stop and --restart options
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os.kill(pid, signal.SIGTERM)
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log.info("Waiting for PyLink instance %s (config %r) to stop...", pid, args.config)
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while os.path.exists(pidfile):
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# XXX: this is ugly, but os.waitpid() only works on non-child processes on Windows
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time.sleep(0.2)
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log.info("Successfully killed PID %s for config %r.", pid, args.config)
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if args.stop:
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sys.exit()
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else:
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log.error("PID file %r exists; aborting!", pidfile)
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if psutil is None:
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log.error("If PyLink didn't shut down cleanly last time it ran, or you're upgrading "
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"from PyLink < 1.1-dev, delete %r and start the server again.", pidfile)
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if os.name == 'posix':
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log.error("Alternatively, you can install psutil for Python 3 (pip3 install psutil), "
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"which will allow this launcher to detect stale PID files and ignore them.")
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sys.exit(1)
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elif args.stop or args.restart or args.rehash: # XXX: also repetitive
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# --stop and --restart should take care of stale PIDs.
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if pid:
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world._should_remove_pid = True
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log.error('Cannot stop/rehash PyLink: no process with PID %s exists.', pid)
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else:
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log.error('Cannot stop/rehash PyLink: PID file %r does not exist.', pidfile)
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sys.exit(1)
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with open(pidfile, 'w') as f:
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f.write(str(os.getpid()))
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world._should_remove_pid = True
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log.info('PyLink %s starting...', __version__)
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# Set terminal window title. See https://bbs.archlinux.org/viewtopic.php?id=85567
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# and https://stackoverflow.com/questions/7387276/
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if os.name == 'nt':
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import ctypes
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ctypes.windll.kernel32.SetConsoleTitleW("PyLink %s" % __version__)
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elif os.name == 'posix':
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sys.stdout.write("\x1b]2;PyLink %s\x07" % __version__)
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# Load configured plugins
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to_load = conf.conf['plugins']
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utils.resetModuleDirs()
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for plugin in to_load:
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try:
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world.plugins[plugin] = pl = utils.loadPlugin(plugin)
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except Exception as e:
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log.exception('Failed to load plugin %r: %s: %s', plugin, type(e).__name__, str(e))
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else:
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if hasattr(pl, 'main'):
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log.debug('Calling main() function of plugin %r', pl)
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pl.main()
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# Initialize all the networks one by one
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for network, sdata in conf.conf['servers'].items():
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try:
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protoname = sdata['protocol']
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except (KeyError, TypeError):
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log.error("(%s) Configuration error: No protocol module specified, aborting.", network)
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else:
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# Fetch the correct protocol module.
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try:
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proto = utils.getProtocolModule(protoname)
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# Create and connect the network.
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log.debug('Connecting to network %r', network)
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world.networkobjects[network] = classes.Irc(network, proto, conf.conf)
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except:
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log.exception('(%s) Failed to connect to network %r, skipping it...',
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network, network)
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continue
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world.started.set()
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log.info("Loaded plugins: %s", ', '.join(sorted(world.plugins.keys())))
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from pylinkirc import coremods
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coremods.permissions.resetPermissions() # Future note: this is moved to run on import in 2.0
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90
pylink
90
pylink
@ -1,95 +1,13 @@
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#!/usr/bin/env python3
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"""
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PyLink IRC Services launcher.
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"""
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import os
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import sys
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try:
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from pylinkirc import world
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from pylinkirc import launcher
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except ImportError:
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sys.stderr.write("ERROR: Failed to import PyLink main module (pylinkirc.world).\n\nIf you are "
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print("ERROR: Failed to import PyLink launcher module (pylinkirc.launcher).\n\nIf you are "
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"running PyLink from source, please install PyLink first using 'python3 "
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"setup.py install' (global install) or 'python3 setup.py install --user'"
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" (local install)\n")
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sys.exit(1)
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from pylinkirc import conf, __version__, real_version
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else:
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if __name__ == '__main__':
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import argparse
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parser = argparse.ArgumentParser(description='Starts an instance of PyLink IRC Services.')
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parser.add_argument('config', help='specifies the path to the config file (defaults to pylink.yml)', nargs='?', default='pylink.yml')
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parser.add_argument("-v", "--version", help="displays the program version and exits", action='store_true')
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parser.add_argument("-c", "--check-pid", help="enables PID file checking", action='store_true')
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parser.add_argument("-n", "--no-pid", help="skips generating PID files", action='store_true')
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args = parser.parse_args()
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if args.version: # Display version and exit
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print('PyLink %s (in VCS: %s)' % (__version__, real_version))
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sys.exit()
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# FIXME: we can't pass logging on to conf until we set up the config...
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conf.loadConf(args.config)
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from pylinkirc.log import log
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from pylinkirc import classes, utils, coremods
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log.info('PyLink %s starting...', __version__)
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# Set terminal window title. See https://bbs.archlinux.org/viewtopic.php?id=85567
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# and https://stackoverflow.com/questions/7387276/
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if os.name == 'nt':
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import ctypes
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ctypes.windll.kernel32.SetConsoleTitleW("PyLink %s" % __version__)
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elif os.name == 'posix':
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sys.stdout.write("\x1b]2;PyLink %s\x07" % __version__)
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# Check for a pid file. This stops instance overlap and user mistakes, which are especially an
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# issue for clientbot...
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if args.check_pid:
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config = conf.confname
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if os.path.exists("%s.pid" % config):
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log.error("PID file exists; aborting! If PyLink didn't shut down cleanly last time it "
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"was run, or you're upgrading from PyLink < 1.1-dev, delete %s.pid and try "
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"again." % config)
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sys.exit(1)
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# Write a PID file unless specifically told not to.
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if not args.no_pid:
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with open('%s.pid' % conf.confname, 'w') as f:
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f.write(str(os.getpid()))
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world._should_remove_pid = True
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# Import plugins first globally, because they can listen for events
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# that happen before the connection phase.
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to_load = conf.conf['plugins']
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utils.resetModuleDirs()
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# Here, we override the module lookup and import the plugins
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# dynamically depending on which were configured.
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for plugin in to_load:
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try:
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world.plugins[plugin] = pl = utils.loadPlugin(plugin)
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except Exception as e:
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log.exception('Failed to load plugin %r: %s: %s', plugin, type(e).__name__, str(e))
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else:
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if hasattr(pl, 'main'):
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log.debug('Calling main() function of plugin %r', pl)
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pl.main()
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# Initialize all the networks one by one
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for network, sdata in conf.conf['servers'].items():
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try:
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protoname = sdata['protocol']
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except (KeyError, TypeError):
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log.error("(%s) Configuration error: No protocol module specified, aborting.", network)
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else:
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# Fetch the correct protocol module
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proto = utils.getProtocolModule(protoname)
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world.networkobjects[network] = irc = classes.Irc(network, proto, conf.conf)
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world.started.set()
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log.info("Loaded plugins: %s", ', '.join(sorted(world.plugins.keys())))
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from pylinkirc import coremods
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coremods.permissions.resetPermissions() # XXX we should probably move this to run on import
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launcher.main()
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7
setup.py
7
setup.py
@ -80,6 +80,7 @@ setup(
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extras_require={
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'password-hashing': ['passlib'],
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'cron-support': ['psutil'],
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'servprotect': ['expiringdict>=1.1.4'],
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},
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@ -98,5 +99,9 @@ setup(
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package_dir = {'pylinkirc': '.'},
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# Executable scripts
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scripts=["pylink", "pylink-mkpasswd"],
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scripts=["pylink-mkpasswd"],
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entry_points = {
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'console_scripts': ['pylink=pylinkirc.launcher:main'],
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}
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)
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