578 lines
17 KiB
Python
578 lines
17 KiB
Python
#!/usr/bin/env python
|
|
# -*- coding: utf-8 -*-
|
|
#
|
|
# Copyright 2011 Yesudeep Mangalapilly <yesudeep@gmail.com>
|
|
# Copyright 2012 Google, Inc.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
"""
|
|
:module: watchdog.watchmedo
|
|
:author: yesudeep@google.com (Yesudeep Mangalapilly)
|
|
:synopsis: ``watchmedo`` shell script utility.
|
|
"""
|
|
|
|
import os.path
|
|
import sys
|
|
import yaml
|
|
import time
|
|
import logging
|
|
|
|
try:
|
|
from cStringIO import StringIO
|
|
except ImportError:
|
|
try:
|
|
from StringIO import StringIO
|
|
except ImportError:
|
|
from io import StringIO
|
|
|
|
from argh import arg, aliases, ArghParser, expects_obj
|
|
from .version import VERSION_STRING
|
|
from .utils import load_class
|
|
|
|
|
|
logging.basicConfig(level=logging.INFO)
|
|
|
|
CONFIG_KEY_TRICKS = 'tricks'
|
|
CONFIG_KEY_PYTHON_PATH = 'python-path'
|
|
|
|
|
|
def path_split(pathname_spec, separator=os.path.sep):
|
|
"""
|
|
Splits a pathname specification separated by an OS-dependent separator.
|
|
|
|
:param pathname_spec:
|
|
The pathname specification.
|
|
:param separator:
|
|
(OS Dependent) `:` on Unix and `;` on Windows or user-specified.
|
|
"""
|
|
return list(pathname_spec.split(separator))
|
|
|
|
|
|
def add_to_sys_path(pathnames, index=0):
|
|
"""
|
|
Adds specified paths at specified index into the sys.path list.
|
|
|
|
:param paths:
|
|
A list of paths to add to the sys.path
|
|
:param index:
|
|
(Default 0) The index in the sys.path list where the paths will be
|
|
added.
|
|
"""
|
|
for pathname in pathnames[::-1]:
|
|
sys.path.insert(index, pathname)
|
|
|
|
|
|
def load_config(tricks_file_pathname):
|
|
"""
|
|
Loads the YAML configuration from the specified file.
|
|
|
|
:param tricks_file_path:
|
|
The path to the tricks configuration file.
|
|
:returns:
|
|
A dictionary of configuration information.
|
|
"""
|
|
f = open(tricks_file_pathname, 'rb')
|
|
content = f.read()
|
|
f.close()
|
|
config = yaml.load(content)
|
|
return config
|
|
|
|
|
|
def parse_patterns(patterns_spec, ignore_patterns_spec, separator=';'):
|
|
"""
|
|
Parses pattern argument specs and returns a two-tuple of
|
|
(patterns, ignore_patterns).
|
|
"""
|
|
patterns = patterns_spec.split(separator)
|
|
ignore_patterns = ignore_patterns_spec.split(separator)
|
|
if ignore_patterns == ['']:
|
|
ignore_patterns = []
|
|
return (patterns, ignore_patterns)
|
|
|
|
|
|
def observe_with(observer, event_handler, pathnames, recursive):
|
|
"""
|
|
Single observer thread with a scheduled path and event handler.
|
|
|
|
:param observer:
|
|
The observer thread.
|
|
:param event_handler:
|
|
Event handler which will be called in response to file system events.
|
|
:param pathnames:
|
|
A list of pathnames to monitor.
|
|
:param recursive:
|
|
``True`` if recursive; ``False`` otherwise.
|
|
"""
|
|
for pathname in set(pathnames):
|
|
observer.schedule(event_handler, pathname, recursive)
|
|
observer.start()
|
|
try:
|
|
while True:
|
|
time.sleep(1)
|
|
except KeyboardInterrupt:
|
|
observer.stop()
|
|
observer.join()
|
|
|
|
|
|
def schedule_tricks(observer, tricks, pathname, recursive):
|
|
"""
|
|
Schedules tricks with the specified observer and for the given watch
|
|
path.
|
|
|
|
:param observer:
|
|
The observer thread into which to schedule the trick and watch.
|
|
:param tricks:
|
|
A list of tricks.
|
|
:param pathname:
|
|
A path name which should be watched.
|
|
:param recursive:
|
|
``True`` if recursive; ``False`` otherwise.
|
|
"""
|
|
for trick in tricks:
|
|
for name, value in list(trick.items()):
|
|
TrickClass = load_class(name)
|
|
handler = TrickClass(**value)
|
|
trick_pathname = getattr(handler, 'source_directory', None) or pathname
|
|
observer.schedule(handler, trick_pathname, recursive)
|
|
|
|
|
|
@aliases('tricks')
|
|
@arg('files',
|
|
nargs='*',
|
|
help='perform tricks from given file')
|
|
@arg('--python-path',
|
|
default='.',
|
|
help='paths separated by %s to add to the python path' % os.path.sep)
|
|
@arg('--interval',
|
|
'--timeout',
|
|
dest='timeout',
|
|
default=1.0,
|
|
help='use this as the polling interval/blocking timeout')
|
|
@arg('--recursive',
|
|
default=True,
|
|
help='recursively monitor paths')
|
|
@expects_obj
|
|
def tricks_from(args):
|
|
"""
|
|
Subcommand to execute tricks from a tricks configuration file.
|
|
|
|
:param args:
|
|
Command line argument options.
|
|
"""
|
|
from watchdog.observers import Observer
|
|
|
|
add_to_sys_path(path_split(args.python_path))
|
|
observers = []
|
|
for tricks_file in args.files:
|
|
observer = Observer(timeout=args.timeout)
|
|
|
|
if not os.path.exists(tricks_file):
|
|
raise IOError("cannot find tricks file: %s" % tricks_file)
|
|
|
|
config = load_config(tricks_file)
|
|
|
|
try:
|
|
tricks = config[CONFIG_KEY_TRICKS]
|
|
except KeyError:
|
|
raise KeyError("No `%s' key specified in %s." % (
|
|
CONFIG_KEY_TRICKS, tricks_file))
|
|
|
|
if CONFIG_KEY_PYTHON_PATH in config:
|
|
add_to_sys_path(config[CONFIG_KEY_PYTHON_PATH])
|
|
|
|
dir_path = os.path.dirname(tricks_file)
|
|
if not dir_path:
|
|
dir_path = os.path.relpath(os.getcwd())
|
|
schedule_tricks(observer, tricks, dir_path, args.recursive)
|
|
observer.start()
|
|
observers.append(observer)
|
|
|
|
try:
|
|
while True:
|
|
time.sleep(1)
|
|
except KeyboardInterrupt:
|
|
for o in observers:
|
|
o.unschedule_all()
|
|
o.stop()
|
|
for o in observers:
|
|
o.join()
|
|
|
|
|
|
@aliases('generate-tricks-yaml')
|
|
@arg('trick_paths',
|
|
nargs='*',
|
|
help='Dotted paths for all the tricks you want to generate')
|
|
@arg('--python-path',
|
|
default='.',
|
|
help='paths separated by %s to add to the python path' % os.path.sep)
|
|
@arg('--append-to-file',
|
|
default=None,
|
|
help='appends the generated tricks YAML to a file; \
|
|
if not specified, prints to standard output')
|
|
@arg('-a',
|
|
'--append-only',
|
|
dest='append_only',
|
|
default=False,
|
|
help='if --append-to-file is not specified, produces output for \
|
|
appending instead of a complete tricks yaml file.')
|
|
@expects_obj
|
|
def tricks_generate_yaml(args):
|
|
"""
|
|
Subcommand to generate Yaml configuration for tricks named on the command
|
|
line.
|
|
|
|
:param args:
|
|
Command line argument options.
|
|
"""
|
|
python_paths = path_split(args.python_path)
|
|
add_to_sys_path(python_paths)
|
|
output = StringIO()
|
|
|
|
for trick_path in args.trick_paths:
|
|
TrickClass = load_class(trick_path)
|
|
output.write(TrickClass.generate_yaml())
|
|
|
|
content = output.getvalue()
|
|
output.close()
|
|
|
|
header = yaml.dump({CONFIG_KEY_PYTHON_PATH: python_paths})
|
|
header += "%s:\n" % CONFIG_KEY_TRICKS
|
|
if args.append_to_file is None:
|
|
# Output to standard output.
|
|
if not args.append_only:
|
|
content = header + content
|
|
sys.stdout.write(content)
|
|
else:
|
|
if not os.path.exists(args.append_to_file):
|
|
content = header + content
|
|
output = open(args.append_to_file, 'ab')
|
|
output.write(content)
|
|
output.close()
|
|
|
|
|
|
@arg('directories',
|
|
nargs='*',
|
|
default='.',
|
|
help='directories to watch.')
|
|
@arg('-p',
|
|
'--pattern',
|
|
'--patterns',
|
|
dest='patterns',
|
|
default='*',
|
|
help='matches event paths with these patterns (separated by ;).')
|
|
@arg('-i',
|
|
'--ignore-pattern',
|
|
'--ignore-patterns',
|
|
dest='ignore_patterns',
|
|
default='',
|
|
help='ignores event paths with these patterns (separated by ;).')
|
|
@arg('-D',
|
|
'--ignore-directories',
|
|
dest='ignore_directories',
|
|
default=False,
|
|
help='ignores events for directories')
|
|
@arg('-R',
|
|
'--recursive',
|
|
dest='recursive',
|
|
default=False,
|
|
help='monitors the directories recursively')
|
|
@arg('--interval',
|
|
'--timeout',
|
|
dest='timeout',
|
|
default=1.0,
|
|
help='use this as the polling interval/blocking timeout')
|
|
@arg('--trace',
|
|
default=False,
|
|
help='dumps complete dispatching trace')
|
|
@arg('--debug-force-polling',
|
|
default=False,
|
|
help='[debug] forces polling')
|
|
@arg('--debug-force-kqueue',
|
|
default=False,
|
|
help='[debug] forces BSD kqueue(2)')
|
|
@arg('--debug-force-winapi',
|
|
default=False,
|
|
help='[debug] forces Windows API')
|
|
@arg('--debug-force-winapi-async',
|
|
default=False,
|
|
help='[debug] forces Windows API + I/O completion')
|
|
@arg('--debug-force-fsevents',
|
|
default=False,
|
|
help='[debug] forces Mac OS X FSEvents')
|
|
@arg('--debug-force-inotify',
|
|
default=False,
|
|
help='[debug] forces Linux inotify(7)')
|
|
@expects_obj
|
|
def log(args):
|
|
"""
|
|
Subcommand to log file system events to the console.
|
|
|
|
:param args:
|
|
Command line argument options.
|
|
"""
|
|
from watchdog.utils import echo
|
|
from watchdog.tricks import LoggerTrick
|
|
|
|
if args.trace:
|
|
echo.echo_class(LoggerTrick)
|
|
|
|
patterns, ignore_patterns =\
|
|
parse_patterns(args.patterns, args.ignore_patterns)
|
|
handler = LoggerTrick(patterns=patterns,
|
|
ignore_patterns=ignore_patterns,
|
|
ignore_directories=args.ignore_directories)
|
|
if args.debug_force_polling:
|
|
from watchdog.observers.polling import PollingObserver as Observer
|
|
elif args.debug_force_kqueue:
|
|
from watchdog.observers.kqueue import KqueueObserver as Observer
|
|
elif args.debug_force_winapi_async:
|
|
from watchdog.observers.read_directory_changes_async import\
|
|
WindowsApiAsyncObserver as Observer
|
|
elif args.debug_force_winapi:
|
|
from watchdog.observers.read_directory_changes import\
|
|
WindowsApiObserver as Observer
|
|
elif args.debug_force_inotify:
|
|
from watchdog.observers.inotify import InotifyObserver as Observer
|
|
elif args.debug_force_fsevents:
|
|
from watchdog.observers.fsevents import FSEventsObserver as Observer
|
|
else:
|
|
# Automatically picks the most appropriate observer for the platform
|
|
# on which it is running.
|
|
from watchdog.observers import Observer
|
|
observer = Observer(timeout=args.timeout)
|
|
observe_with(observer, handler, args.directories, args.recursive)
|
|
|
|
|
|
@arg('directories',
|
|
nargs='*',
|
|
default='.',
|
|
help='directories to watch')
|
|
@arg('-c',
|
|
'--command',
|
|
dest='command',
|
|
default=None,
|
|
help='''shell command executed in response to matching events.
|
|
These interpolation variables are available to your command string::
|
|
|
|
${watch_src_path} - event source path;
|
|
${watch_dest_path} - event destination path (for moved events);
|
|
${watch_event_type} - event type;
|
|
${watch_object} - ``file`` or ``directory``
|
|
|
|
Note::
|
|
Please ensure you do not use double quotes (") to quote
|
|
your command string. That will force your shell to
|
|
interpolate before the command is processed by this
|
|
subcommand.
|
|
|
|
Example option usage::
|
|
|
|
--command='echo "${watch_src_path}"'
|
|
''')
|
|
@arg('-p',
|
|
'--pattern',
|
|
'--patterns',
|
|
dest='patterns',
|
|
default='*',
|
|
help='matches event paths with these patterns (separated by ;).')
|
|
@arg('-i',
|
|
'--ignore-pattern',
|
|
'--ignore-patterns',
|
|
dest='ignore_patterns',
|
|
default='',
|
|
help='ignores event paths with these patterns (separated by ;).')
|
|
@arg('-D',
|
|
'--ignore-directories',
|
|
dest='ignore_directories',
|
|
default=False,
|
|
help='ignores events for directories')
|
|
@arg('-R',
|
|
'--recursive',
|
|
dest='recursive',
|
|
default=False,
|
|
help='monitors the directories recursively')
|
|
@arg('--interval',
|
|
'--timeout',
|
|
dest='timeout',
|
|
default=1.0,
|
|
help='use this as the polling interval/blocking timeout')
|
|
@arg('-w', '--wait',
|
|
dest='wait_for_process',
|
|
action='store_true',
|
|
default=False,
|
|
help="wait for process to finish to avoid multiple simultaneous instances")
|
|
@arg('-W', '--drop',
|
|
dest='drop_during_process',
|
|
action='store_true',
|
|
default=False,
|
|
help="Ignore events that occur while command is still being executed " \
|
|
"to avoid multiple simultaneous instances")
|
|
@arg('--debug-force-polling',
|
|
default=False,
|
|
help='[debug] forces polling')
|
|
@expects_obj
|
|
def shell_command(args):
|
|
"""
|
|
Subcommand to execute shell commands in response to file system events.
|
|
|
|
:param args:
|
|
Command line argument options.
|
|
"""
|
|
from watchdog.tricks import ShellCommandTrick
|
|
|
|
if not args.command:
|
|
args.command = None
|
|
|
|
if args.debug_force_polling:
|
|
from watchdog.observers.polling import PollingObserver as Observer
|
|
else:
|
|
from watchdog.observers import Observer
|
|
|
|
patterns, ignore_patterns = parse_patterns(args.patterns,
|
|
args.ignore_patterns)
|
|
handler = ShellCommandTrick(shell_command=args.command,
|
|
patterns=patterns,
|
|
ignore_patterns=ignore_patterns,
|
|
ignore_directories=args.ignore_directories,
|
|
wait_for_process=args.wait_for_process,
|
|
drop_during_process=args.drop_during_process)
|
|
observer = Observer(timeout=args.timeout)
|
|
observe_with(observer, handler, args.directories, args.recursive)
|
|
|
|
|
|
@arg('command',
|
|
help='''Long-running command to run in a subprocess.
|
|
''')
|
|
@arg('command_args',
|
|
metavar='arg',
|
|
nargs='*',
|
|
help='''Command arguments.
|
|
|
|
Note: Use -- before the command arguments, otherwise watchmedo will
|
|
try to interpret them.
|
|
''')
|
|
@arg('-d',
|
|
'--directory',
|
|
dest='directories',
|
|
metavar='directory',
|
|
action='append',
|
|
help='Directory to watch. Use another -d or --directory option '
|
|
'for each directory.')
|
|
@arg('-p',
|
|
'--pattern',
|
|
'--patterns',
|
|
dest='patterns',
|
|
default='*',
|
|
help='matches event paths with these patterns (separated by ;).')
|
|
@arg('-i',
|
|
'--ignore-pattern',
|
|
'--ignore-patterns',
|
|
dest='ignore_patterns',
|
|
default='',
|
|
help='ignores event paths with these patterns (separated by ;).')
|
|
@arg('-D',
|
|
'--ignore-directories',
|
|
dest='ignore_directories',
|
|
default=False,
|
|
help='ignores events for directories')
|
|
@arg('-R',
|
|
'--recursive',
|
|
dest='recursive',
|
|
default=False,
|
|
help='monitors the directories recursively')
|
|
@arg('--interval',
|
|
'--timeout',
|
|
dest='timeout',
|
|
default=1.0,
|
|
help='use this as the polling interval/blocking timeout')
|
|
@arg('--signal',
|
|
dest='signal',
|
|
default='SIGINT',
|
|
help='stop the subprocess with this signal (default SIGINT)')
|
|
@arg('--kill-after',
|
|
dest='kill_after',
|
|
default=10.0,
|
|
help='when stopping, kill the subprocess after the specified timeout '
|
|
'(default 10)')
|
|
@expects_obj
|
|
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 = ['.']
|
|
|
|
# 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()
|
|
|
|
|
|
epilog = """Copyright 2011 Yesudeep Mangalapilly <yesudeep@gmail.com>.
|
|
Copyright 2012 Google, Inc.
|
|
|
|
Licensed under the terms of the Apache license, version 2.0. Please see
|
|
LICENSE in the source code for more information."""
|
|
|
|
parser = ArghParser(epilog=epilog)
|
|
parser.add_commands([tricks_from,
|
|
tricks_generate_yaml,
|
|
log,
|
|
shell_command,
|
|
auto_restart])
|
|
parser.add_argument('--version',
|
|
action='version',
|
|
version='%(prog)s ' + VERSION_STRING)
|
|
|
|
|
|
def main():
|
|
"""Entry-point function."""
|
|
parser.dispatch()
|
|
|
|
|
|
if __name__ == '__main__':
|
|
main()
|