11a2b8888b
1. Moved RESTART_EXIT_CODE to constants so it can safely be used by __main__.py. 2. Allowed __main__/main to return the desired exit code. 3. Forwarded the child processes exit code to the parent process to be duplicated. 4. Added —debug flag to pass command to force Home Assistant to run in only one process. A warning is printed to STDERR to indicate HASS is in debug mode. Another is printed if HASS requests a restart in debug mode. A restart request in debug mode will quit. 5. Added an argument to __main__/main/setup_and_run_hass to indicate that it is running in the top process. This tells it to return the exit code rather than exiting.
332 lines
9.3 KiB
Python
332 lines
9.3 KiB
Python
""" Starts home assistant. """
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from __future__ import print_function
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from multiprocessing import Process
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import signal
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import sys
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import threading
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import os
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import argparse
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from homeassistant import bootstrap
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import homeassistant.config as config_util
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from homeassistant.const import (__version__, EVENT_HOMEASSISTANT_START,
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RESTART_EXIT_CODE)
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def validate_python():
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""" Validate we're running the right Python version. """
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major, minor = sys.version_info[:2]
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if major < 3 or (major == 3 and minor < 4):
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print("Home Assistant requires atleast Python 3.4")
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sys.exit(1)
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def ensure_config_path(config_dir):
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""" Validates configuration directory. """
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lib_dir = os.path.join(config_dir, 'lib')
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# Test if configuration directory exists
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if not os.path.isdir(config_dir):
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if config_dir != config_util.get_default_config_dir():
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print(('Fatal Error: Specified configuration directory does '
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'not exist {} ').format(config_dir))
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sys.exit(1)
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try:
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os.mkdir(config_dir)
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except OSError:
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print(('Fatal Error: Unable to create default configuration '
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'directory {} ').format(config_dir))
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sys.exit(1)
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# Test if library directory exists
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if not os.path.isdir(lib_dir):
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try:
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os.mkdir(lib_dir)
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except OSError:
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print(('Fatal Error: Unable to create library '
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'directory {} ').format(lib_dir))
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sys.exit(1)
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def ensure_config_file(config_dir):
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""" Ensure configuration file exists. """
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config_path = config_util.ensure_config_exists(config_dir)
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if config_path is None:
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print('Error getting configuration path')
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sys.exit(1)
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return config_path
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def get_arguments():
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""" Get parsed passed in arguments. """
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parser = argparse.ArgumentParser(
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description="Home Assistant: Observe, Control, Automate.")
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parser.add_argument('--version', action='version', version=__version__)
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parser.add_argument(
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'-c', '--config',
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metavar='path_to_config_dir',
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default=config_util.get_default_config_dir(),
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help="Directory that contains the Home Assistant configuration")
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parser.add_argument(
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'--demo-mode',
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action='store_true',
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help='Start Home Assistant in demo mode')
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parser.add_argument(
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'--debug',
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action='store_true',
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help='Start Home Assistant in debug mode. Runs in single process to '
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'enable use of interactive debuggers.')
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parser.add_argument(
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'--open-ui',
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action='store_true',
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help='Open the webinterface in a browser')
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parser.add_argument(
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'--skip-pip',
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action='store_true',
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help='Skips pip install of required packages on startup')
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parser.add_argument(
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'-v', '--verbose',
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action='store_true',
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help="Enable verbose logging to file.")
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parser.add_argument(
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'--pid-file',
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metavar='path_to_pid_file',
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default=None,
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help='Path to PID file useful for running as daemon')
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parser.add_argument(
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'--log-rotate-days',
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type=int,
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default=None,
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help='Enables daily log rotation and keeps up to the specified days')
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parser.add_argument(
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'--install-osx',
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action='store_true',
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help='Installs as a service on OS X and loads on boot.')
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parser.add_argument(
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'--uninstall-osx',
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action='store_true',
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help='Uninstalls from OS X.')
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parser.add_argument(
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'--restart-osx',
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action='store_true',
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help='Restarts on OS X.')
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if os.name != "nt":
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parser.add_argument(
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'--daemon',
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action='store_true',
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help='Run Home Assistant as daemon')
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arguments = parser.parse_args()
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if os.name == "nt":
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arguments.daemon = False
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return arguments
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def daemonize():
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""" Move current process to daemon process """
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# create first fork
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pid = os.fork()
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if pid > 0:
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sys.exit(0)
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# decouple fork
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os.setsid()
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os.umask(0)
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# create second fork
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pid = os.fork()
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if pid > 0:
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sys.exit(0)
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def check_pid(pid_file):
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""" Check that HA is not already running """
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# check pid file
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try:
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pid = int(open(pid_file, 'r').readline())
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except IOError:
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# PID File does not exist
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return
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try:
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os.kill(pid, 0)
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except OSError:
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# PID does not exist
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return
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print('Fatal Error: HomeAssistant is already running.')
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sys.exit(1)
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def write_pid(pid_file):
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""" Create PID File """
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pid = os.getpid()
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try:
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open(pid_file, 'w').write(str(pid))
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except IOError:
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print('Fatal Error: Unable to write pid file {}'.format(pid_file))
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sys.exit(1)
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def install_osx():
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""" Setup to run via launchd on OS X """
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with os.popen('which hass') as inp:
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hass_path = inp.read().strip()
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with os.popen('whoami') as inp:
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user = inp.read().strip()
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cwd = os.path.dirname(__file__)
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template_path = os.path.join(cwd, 'startup', 'launchd.plist')
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with open(template_path, 'r', encoding='utf-8') as inp:
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plist = inp.read()
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plist = plist.replace("$HASS_PATH$", hass_path)
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plist = plist.replace("$USER$", user)
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path = os.path.expanduser("~/Library/LaunchAgents/org.homeassistant.plist")
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try:
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with open(path, 'w', encoding='utf-8') as outp:
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outp.write(plist)
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except IOError as err:
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print('Unable to write to ' + path, err)
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return
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os.popen('launchctl load -w -F ' + path)
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print("Home Assistant has been installed. \
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Open it here: http://localhost:8123")
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def uninstall_osx():
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""" Unload from launchd on OS X """
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path = os.path.expanduser("~/Library/LaunchAgents/org.homeassistant.plist")
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os.popen('launchctl unload ' + path)
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print("Home Assistant has been uninstalled.")
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def setup_and_run_hass(config_dir, args, top_process=False):
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"""
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Setup HASS and run. Block until stopped. Will assume it is running in a
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subprocess unless top_process is set to true.
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"""
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if args.demo_mode:
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config = {
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'frontend': {},
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'demo': {}
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}
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hass = bootstrap.from_config_dict(
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config, config_dir=config_dir, daemon=args.daemon,
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verbose=args.verbose, skip_pip=args.skip_pip,
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log_rotate_days=args.log_rotate_days)
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else:
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config_file = ensure_config_file(config_dir)
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print('Config directory:', config_dir)
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hass = bootstrap.from_config_file(
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config_file, daemon=args.daemon, verbose=args.verbose,
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skip_pip=args.skip_pip, log_rotate_days=args.log_rotate_days)
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if args.open_ui:
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def open_browser(event):
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""" Open the webinterface in a browser. """
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if hass.config.api is not None:
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import webbrowser
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webbrowser.open(hass.config.api.base_url)
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hass.bus.listen_once(EVENT_HOMEASSISTANT_START, open_browser)
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hass.start()
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exit_code = int(hass.block_till_stopped())
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if not top_process:
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sys.exit(exit_code)
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return exit_code
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def run_hass_process(hass_proc):
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""" Runs a child hass process. Returns True if it should be restarted. """
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requested_stop = threading.Event()
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hass_proc.daemon = True
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def request_stop():
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""" request hass stop """
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requested_stop.set()
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hass_proc.terminate()
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try:
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signal.signal(signal.SIGTERM, request_stop)
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except ValueError:
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print('Could not bind to SIGTERM. Are you running in a thread?')
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hass_proc.start()
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try:
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hass_proc.join()
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except KeyboardInterrupt:
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request_stop()
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try:
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hass_proc.join()
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except KeyboardInterrupt:
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return False
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return (not requested_stop.isSet() and
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hass_proc.exitcode == RESTART_EXIT_CODE,
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hass_proc.exitcode)
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def main():
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""" Starts Home Assistant. """
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validate_python()
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args = get_arguments()
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config_dir = os.path.join(os.getcwd(), args.config)
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ensure_config_path(config_dir)
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# os x launchd functions
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if args.install_osx:
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install_osx()
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return 0
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if args.uninstall_osx:
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uninstall_osx()
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return 0
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if args.restart_osx:
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uninstall_osx()
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install_osx()
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return 0
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# daemon functions
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if args.pid_file:
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check_pid(args.pid_file)
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if args.daemon:
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daemonize()
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if args.pid_file:
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write_pid(args.pid_file)
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# Run hass in debug mode if requested
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if args.debug:
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sys.stderr.write('Running in debug mode. '
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'Home Assistant will not be able to restart.\n')
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exit_code = setup_and_run_hass(config_dir, args, top_process=True)
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if exit_code == RESTART_EXIT_CODE:
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sys.stderr.write('Home Assistant requested a '
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'restart in debug mode.\n')
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return exit_code
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# Run hass as child process. Restart if necessary.
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keep_running = True
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while keep_running:
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hass_proc = Process(target=setup_and_run_hass, args=(config_dir, args))
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keep_running, exit_code = run_hass_process(hass_proc)
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return exit_code
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if __name__ == "__main__":
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sys.exit(main())
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