def auto_restart(args):
"""
Subcommand to start a long-running subprocess and restart it
on matched events.
:param args:
Command line argument options.
"""
if args.debug_force_polling:
from watchdog.observers.polling import PollingObserver as Observer
else:
from watchdog.observers import Observer
from watchdog.tricks import AutoRestartTrick
import signal
if not args.directories:
args.directories = ['.']
# Allow either signal name or number.
if args.signal.startswith("SIG"):
stop_signal = getattr(signal, args.signal)
else:
stop_signal = int(args.signal)
# Handle termination signals by raising a semantic exception which will
# allow us to gracefully unwind and stop the observer
termination_signals = {signal.SIGTERM, signal.SIGINT}
def handler_termination_signal(_signum, _frame):
# Neuter all signals so that we don't attempt a double shutdown
for signum in termination_signals:
signal.signal(signum, signal.SIG_IGN)
raise WatchdogShutdown
for signum in termination_signals:
signal.signal(signum, handler_termination_signal)
patterns, ignore_patterns = parse_patterns(args.patterns,
args.ignore_patterns)
command = [args.command]
command.extend(args.command_args)
handler = AutoRestartTrick(command=command,
patterns=patterns,
ignore_patterns=ignore_patterns,
ignore_directories=args.ignore_directories,
stop_signal=stop_signal,
kill_after=args.kill_after)
handler.start()
observer = Observer(timeout=args.timeout)
try:
observe_with(observer, handler, args.directories, args.recursive)
except WatchdogShutdown:
pass
finally:
handler.stop()
def test_auto_restart_subprocess_termination(tmpdir, capfd):
from watchdog.tricks import AutoRestartTrick
import sys
import time
script = make_dummy_script(tmpdir, n=2)
a = AutoRestartTrick([sys.executable, script])
a.start()
time.sleep(5)
a.stop()
cap = capfd.readouterr()
assert cap.out.splitlines(keepends=False).count('+++++ 0') > 1
def test_kill_auto_restart(tmpdir, capfd):
from watchdog.tricks import AutoRestartTrick
import sys
import time
script = make_dummy_script(tmpdir)
a = AutoRestartTrick([sys.executable, script])
a.start()
time.sleep(3)
a.stop()
cap = capfd.readouterr()
assert '+++++ 0' in cap.out
assert '+++++ 9' not in cap.out # we killed the subprocess before the end
def auto_restart(args):
"""
Subcommand to start a long-running subprocess and restart it
on matched events.
:param args:
Command line argument options.
"""
if args.debug_force_polling:
from watchdog.observers.polling import PollingObserver as Observer
else:
from watchdog.observers import Observer
from watchdog.tricks import AutoRestartTrick
import signal
import re
if not args.directories:
args.directories = ['.']
# Allow either signal name or number.
if re.match('^SIG[A-Z]+$', args.signal):
stop_signal = getattr(signal, args.signal)
else:
stop_signal = int(args.signal)
# Handle SIGTERM in the same manner as SIGINT so that
# this program has a chance to stop the child process.
def handle_sigterm(_signum, _frame):
raise KeyboardInterrupt()
signal.signal(signal.SIGTERM, handle_sigterm)
patterns, ignore_patterns = parse_patterns(args.patterns,
args.ignore_patterns)
command = [args.command]
command.extend(args.command_args)
handler = AutoRestartTrick(command=command,
patterns=patterns,
ignore_patterns=ignore_patterns,
ignore_directories=args.ignore_directories,
stop_signal=stop_signal,
kill_after=args.kill_after)
handler.start()
observer = Observer(timeout=args.timeout)
observe_with(observer, handler, args.directories, args.recursive)
handler.stop()
def auto_restart(args):
"""
Subcommand to start a long-running subprocess and restart it
on matched events.
:param args:
Command line argument options.
"""
if args.debug_force_polling:
from watchdog.observers.polling import PollingObserver as Observer
else:
from watchdog.observers import Observer
from watchdog.tricks import AutoRestartTrick
import signal
if not args.directories:
args.directories = ['.']
# Allow either signal name or number.
if args.signal.startswith("SIG"):
stop_signal = getattr(signal, args.signal)
else:
stop_signal = int(args.signal)
# Handle SIGTERM in the same manner as SIGINT so that
# this program has a chance to stop the child process.
def handle_sigterm(_signum, _frame):
raise KeyboardInterrupt()
signal.signal(signal.SIGTERM, handle_sigterm)
patterns, ignore_patterns = parse_patterns(args.patterns,
args.ignore_patterns)
command = [args.command]
command.extend(args.command_args)
handler = AutoRestartTrick(command=command,
patterns=patterns,
ignore_patterns=ignore_patterns,
ignore_directories=args.ignore_directories,
stop_signal=stop_signal,
kill_after=args.kill_after)
handler.start()
observer = Observer(timeout=args.timeout)
observe_with(observer, handler, args.directories, args.recursive)
handler.stop()
def auto_restart(args):
"""
Subcommand to start a long-running subprocess and restart it
on matched events.
:param args:
Command line argument options.
"""
from watchdog.observers import Observer
from watchdog.tricks import AutoRestartTrick
import signal
import re
if not args.directories:
args.directories = ['.']
if re.match('^SIG[A-Z]+$', args.signal):
stop_signal = getattr(signal, args.signal)
else:
stop_signal = int(args.signal)
def handle_sigterm(_signum, _frame):
raise KeyboardInterrupt()
signal.signal(signal.SIGTERM, handle_sigterm)
patterns, ignore_patterns = parse_patterns(args.patterns,
args.ignore_patterns)
command = [args.command]
command.extend(args.command_args)
handler = AutoRestartTrick(command=command,
patterns=patterns,
ignore_patterns=ignore_patterns,
ignore_directories=args.ignore_directories,
stop_signal=stop_signal,
kill_after=args.kill_after)
handler.start()
observer = Observer(timeout=args.timeout)
observe_with(observer, handler, args.directories, args.recursive)
handler.stop()
def auto_restart(args):
from watchdog.observers import Observer
from watchdog.tricks import AutoRestartTrick
import signal
import re
if not args.directories:
args.directories = ['.']
if re.match('^SIG[A-Z]+$', args.signal):
stop_signal = getattr(signal, args.signal)
else:
stop_signal = int(args.signal)
def handle_sigterm(_signum, _frame):
raise KeyboardInterrupt()
signal.signal(signal.SIGTERM, handle_sigterm)
patterns, ignore_patterns = parse_patterns(args.patterns, args.ignore_patterns)
command = [args.command]
command.extend(args.command_args)
handler = AutoRestartTrick(command=command, patterns=patterns, ignore_patterns=ignore_patterns, ignore_directories=args.ignore_directories, stop_signal=stop_signal, kill_after=args.kill_after)
handler.start()
observer = Observer(timeout=args.timeout)
observe_with(observer, handler, args.directories, args.recursive)
handler.stop()