def __init__(self, options):
"""
:param options: argparse parsed options object
"""
global manager
assert not manager, 'Only one instance of Manager should be created at a time!'
self.options = options
self.config_base = None
self.config_name = None
self.config_path = None
self.db_filename = None
self.engine = None
self.lockfile = None
self.database_uri = None
self.db_upgraded = False
self._has_lock = False
self.is_daemon = False
self.config = {}
self.ipc_server = IPCServer(self, options.ipc_port)
self.task_queue = TaskQueue()
manager = self
log.debug('sys.defaultencoding: %s' % sys.getdefaultencoding())
log.debug('sys.getfilesystemencoding: %s' %
sys.getfilesystemencoding())
log.debug('os.path.supports_unicode_filenames: %s' %
os.path.supports_unicode_filenames)
if codecs.lookup(sys.getfilesystemencoding(
)).name == 'ascii' and not os.path.supports_unicode_filenames:
log.warning(
'Your locale declares ascii as the filesystem encoding. Any plugins reading filenames from '
'disk will not work properly for filenames containing non-ascii characters. Make sure your '
'locale env variables are set up correctly for the environment which is launching FlexGet.'
)
self.initialize()
# cannot be imported at module level because of circular references
from flexget.utils.simple_persistence import SimplePersistence
self.persist = SimplePersistence('manager')
if db_schema.upgrade_required():
log.info('Database upgrade is required. Attempting now.')
# Make sure not to fire the lock-acquired event yet
# TODO: Detect if any database upgrading is needed and acquire the lock only in one place
with self.acquire_lock(event=False):
fire_event('manager.upgrade', self)
if manager.db_upgraded:
fire_event('manager.db_upgraded', self)
fire_event('manager.startup', self)
def __init__(self, options):
"""
:param options: argparse parsed options object
"""
global manager
assert not manager, 'Only one instance of Manager should be created at a time!'
self.options = options
self.config_base = None
self.config_name = None
self.config_path = None
self.db_filename = None
self.engine = None
self.lockfile = None
self.database_uri = None
self.db_upgraded = False
self._has_lock = False
self.is_daemon = False
self.config = {}
self.ipc_server = IPCServer(self, options.ipc_port)
self.task_queue = TaskQueue()
manager = self
self.initialize()
# cannot be imported at module level because of circular references
from flexget.utils.simple_persistence import SimplePersistence
self.persist = SimplePersistence('manager')
log.debug('sys.defaultencoding: %s' % sys.getdefaultencoding())
log.debug('sys.getfilesystemencoding: %s' %
sys.getfilesystemencoding())
log.debug('os.path.supports_unicode_filenames: %s' %
os.path.supports_unicode_filenames)
if db_schema.upgrade_required():
log.info('Database upgrade is required. Attempting now.')
# Make sure not to fire the lock-acquired event yet
# TODO: Detect if any database upgrading is needed and acquire the lock only in one place
with self.acquire_lock(event=False):
fire_event('manager.upgrade', self)
if manager.db_upgraded:
fire_event('manager.db_upgraded', self)
fire_event('manager.startup', self)
def initialize(self):
"""
Load plugins, database, and config. Also initializes (but does not start) the task queue and ipc server.
This should only be called after obtaining a lock.
"""
if self.initialized:
raise RuntimeError(
'Cannot call initialize on an already initialized manager.')
plugin.load_plugins(
extra_plugins=[os.path.join(self.config_base, 'plugins')],
extra_components=[os.path.join(self.config_base, 'components')],
)
# Reparse CLI options now that plugins are loaded
if not self.args:
self.args = ['--help']
self.options = get_parser().parse_args(self.args)
self.task_queue = TaskQueue()
self.ipc_server = IPCServer(self, self.options.ipc_port)
self.setup_yaml()
self.init_sqlalchemy()
fire_event('manager.initialize', self)
try:
self.load_config()
except ValueError as e:
log.critical('Failed to load config file: %s' % e.args[0])
raise
# cannot be imported at module level because of circular references
from flexget.utils.simple_persistence import SimplePersistence
self.persist = SimplePersistence('manager')
if db_schema.upgrade_required():
log.info('Database upgrade is required. Attempting now.')
fire_event('manager.upgrade', self)
if manager.db_upgraded:
fire_event('manager.db_upgraded', self)
fire_event('manager.startup', self)
self.initialized = True
def __init__(self, options):
"""
:param options: argparse parsed options object
"""
global manager
assert not manager, 'Only one instance of Manager should be created at a time!'
self.options = options
self.config_base = None
self.config_name = None
self.config_path = None
self.db_filename = None
self.engine = None
self.lockfile = None
self.database_uri = None
self.db_upgraded = False
self._has_lock = False
self.is_daemon = False
self.config = {}
self.ipc_server = IPCServer(self, options.ipc_port)
self.task_queue = TaskQueue()
manager = self
log.debug('sys.defaultencoding: %s' % sys.getdefaultencoding())
log.debug('sys.getfilesystemencoding: %s' % sys.getfilesystemencoding())
log.debug('os.path.supports_unicode_filenames: %s' % os.path.supports_unicode_filenames)
if codecs.lookup(sys.getfilesystemencoding()).name == 'ascii' and not os.path.supports_unicode_filenames:
log.warning('Your locale declares ascii as the filesystem encoding. Any plugins reading filenames from '
'disk will not work properly for filenames containing non-ascii characters. Make sure your '
'locale env variables are set up correctly for the environment which is launching FlexGet.')
self.initialize()
# cannot be imported at module level because of circular references
from flexget.utils.simple_persistence import SimplePersistence
self.persist = SimplePersistence('manager')
if db_schema.upgrade_required():
log.info('Database upgrade is required. Attempting now.')
# Make sure not to fire the lock-acquired event yet
# TODO: Detect if any database upgrading is needed and acquire the lock only in one place
with self.acquire_lock(event=False):
fire_event('manager.upgrade', self)
if manager.db_upgraded:
fire_event('manager.db_upgraded', self)
fire_event('manager.startup', self)
def __init__(self, options):
"""
:param options: argparse parsed options object
"""
global manager
assert not manager, 'Only one instance of Manager should be created at a time!'
self.options = options
self.config_base = None
self.config_name = None
self.config_path = None
self.db_filename = None
self.engine = None
self.lockfile = None
self.database_uri = None
self.db_upgraded = False
self._has_lock = False
self.is_daemon = False
self.config = {}
self.ipc_server = IPCServer(self, options.ipc_port)
self.task_queue = TaskQueue()
manager = self
self.initialize()
# cannot be imported at module level because of circular references
from flexget.utils.simple_persistence import SimplePersistence
self.persist = SimplePersistence('manager')
log.debug('sys.defaultencoding: %s' % sys.getdefaultencoding())
log.debug('sys.getfilesystemencoding: %s' % sys.getfilesystemencoding())
log.debug('os.path.supports_unicode_filenames: %s' % os.path.supports_unicode_filenames)
if db_schema.upgrade_required():
log.info('Database upgrade is required. Attempting now.')
# Make sure not to fire the lock-acquired event yet
# TODO: Detect if any database upgrading is needed and acquire the lock only in one place
with self.acquire_lock(event=False):
fire_event('manager.upgrade', self)
if manager.db_upgraded:
fire_event('manager.db_upgraded', self)
fire_event('manager.startup', self)
def initialize(self):
"""
Load plugins, database, and config. Also initializes (but does not start) the task queue and ipc server.
This should only be called after obtaining a lock.
"""
if self.initialized:
raise RuntimeError('Cannot call initialize on an already initialized manager.')
plugin.load_plugins(
extra_plugins=[os.path.join(self.config_base, 'plugins')],
extra_components=[os.path.join(self.config_base, 'components')],
)
# Reparse CLI options now that plugins are loaded
if not self.args:
self.args = ['--help']
self.options = get_parser().parse_args(self.args)
self.task_queue = TaskQueue()
self.ipc_server = IPCServer(self, self.options.ipc_port)
self.setup_yaml()
self.init_sqlalchemy()
fire_event('manager.initialize', self)
try:
self.load_config()
except ValueError as e:
log.critical('Failed to load config file: %s' % e.args[0])
raise
# cannot be imported at module level because of circular references
from flexget.utils.simple_persistence import SimplePersistence
self.persist = SimplePersistence('manager')
if db_schema.upgrade_required():
log.info('Database upgrade is required. Attempting now.')
fire_event('manager.upgrade', self)
if manager.db_upgraded:
fire_event('manager.db_upgraded', self)
fire_event('manager.startup', self)
self.initialized = True
class Manager(object):
"""Manager class for FlexGet
Fires events:
* manager.initialize
The first time the manager is initialized, before config is loaded
* manager.before_config_load
Before the config file is loaded from disk
* manager.before_config_validate
When updating the config, before the validator is run on it
* manager.config_updated
After a configuration file has been loaded or changed (and validated) this event is fired
* manager.startup
After manager has been initialized. This is when application becomes ready to use, however no database lock is
present, so the database must not be modified on this event.
* manager.lock_acquired
The manager does not always require a lock on startup, if one is requested, this event will run when it has been
acquired successfully
* manager.upgrade
If any plugins have declared a newer schema version than exists in the database, this event will be fired to
allow plugins to upgrade their tables
* manager.shutdown_requested
When shutdown has been requested. Any plugins which might add to execution queue should stop when this is fired.
* manager.shutdown
When the manager is exiting
* manager.execute.completed
If execution in current process was completed
* manager.daemon.started
* manager.daemon.completed
* manager.db_cleanup
"""
unit_test = False
options = None
def __init__(self, args):
"""
:param args: CLI args
"""
global manager
if not self.unit_test:
assert not manager, 'Only one instance of Manager should be created at a time!'
elif manager:
log.info('last manager was not torn down correctly')
if args is None:
# Decode all arguments to unicode before parsing
args = unicode_argv()[1:]
self.args = args
self.autoreload_config = False
self.config_file_hash = None
self.config_base = None
self.config_name = None
self.config_path = None
self.db_filename = None
self.engine = None
self.lockfile = None
self.database_uri = None
self.db_upgraded = False
self._has_lock = False
self.is_daemon = False
self.ipc_server = None
self.task_queue = None
self.persist = None
self.initialized = False
self.config = {}
if '--help' in args or '-h' in args:
# TODO: This is a bit hacky, but we can't call parse on real arguments when --help is used because it will
# cause a system exit before plugins are loaded and print incomplete help. This will get us a default
# options object and we'll parse the real args later, or send them to daemon. #2807
self.options, _ = CoreArgumentParser().parse_known_args(
['execute'])
else:
try:
self.options, _ = CoreArgumentParser().parse_known_args(args)
except ParserError:
try:
# If a non-built-in command was used, we need to parse with a parser that
# doesn't define the subparsers
self.options, _ = manager_parser.parse_known_args(args)
except ParserError as e:
manager_parser.print_help()
print('\nError: %s' % e.message)
sys.exit(1)
try:
self.find_config(create=False)
except:
logger.start(level=self.options.loglevel.upper(), to_file=False)
raise
else:
log_file = os.path.expanduser(self.options.logfile)
# If an absolute path is not specified, use the config directory.
if not os.path.isabs(log_file):
log_file = os.path.join(self.config_base, log_file)
logger.start(log_file,
self.options.loglevel.upper(),
to_console=not self.options.cron)
manager = self
log.debug('sys.defaultencoding: %s', sys.getdefaultencoding())
log.debug('sys.getfilesystemencoding: %s', sys.getfilesystemencoding())
log.debug('flexget detected io encoding: %s', io_encoding)
log.debug('os.path.supports_unicode_filenames: %s' %
os.path.supports_unicode_filenames)
if codecs.lookup(sys.getfilesystemencoding(
)).name == 'ascii' and not os.path.supports_unicode_filenames:
log.warning(
'Your locale declares ascii as the filesystem encoding. Any plugins reading filenames from '
'disk will not work properly for filenames containing non-ascii characters. Make sure your '
'locale env variables are set up correctly for the environment which is launching FlexGet.'
)
def initialize(self):
"""
Load plugins, database, and config. Also initializes (but does not start) the task queue and ipc server.
This should only be called after obtaining a lock.
"""
if self.initialized:
raise RuntimeError(
'Cannot call initialize on an already initialized manager.')
plugin.load_plugins(
extra_dirs=[os.path.join(self.config_base, 'plugins')])
# Reparse CLI options now that plugins are loaded
if not self.args:
self.args = ['--help']
self.options = get_parser().parse_args(self.args)
self.task_queue = TaskQueue()
self.ipc_server = IPCServer(self, self.options.ipc_port)
self.setup_yaml()
self.init_sqlalchemy()
fire_event('manager.initialize', self)
try:
self.load_config()
except ValueError as e:
log.critical('Failed to load config file: %s' % e.args[0])
raise
# cannot be imported at module level because of circular references
from flexget.utils.simple_persistence import SimplePersistence
self.persist = SimplePersistence('manager')
if db_schema.upgrade_required():
log.info('Database upgrade is required. Attempting now.')
fire_event('manager.upgrade', self)
if manager.db_upgraded:
fire_event('manager.db_upgraded', self)
fire_event('manager.startup', self)
self.initialized = True
@property
def tasks(self):
"""A list of tasks in the config"""
if not self.config:
return []
return list(self.config.get('tasks', {}).keys())
@property
def has_lock(self):
return self._has_lock
def execute(self, options=None, output=None, loglevel=None, priority=1):
"""
Run all (can be limited with options) tasks from the config.
:param options: Either an :class:`argparse.Namespace` instance, or a dict, containing options for execution
:param output: If a file-like object is specified here, log messages and stdout from the execution will be
written to it.
:param priority: If there are other executions waiting to be run, they will be run in priority order,
lowest first.
:returns: a list of :class:`threading.Event` instances which will be
set when each respective task has finished running
"""
if options is None:
options = copy.copy(self.options.execute)
elif isinstance(options, dict):
options_namespace = copy.copy(self.options.execute)
options_namespace.__dict__.update(options)
options = options_namespace
task_names = self.tasks
# Only reload config if daemon
config_hash = self.hash_config()
if self.is_daemon and self.autoreload_config and self.config_file_hash != config_hash:
log.info('Config change detected. Reloading.')
try:
self.load_config(output_to_console=False,
config_file_hash=config_hash)
log.info('Config successfully reloaded!')
except Exception as e:
log.error('Reloading config failed: %s', e)
# Handle --tasks
if options.tasks:
# Consider * the same as not specifying tasks at all (makes sure manual plugin still works)
if options.tasks == ['*']:
options.tasks = None
else:
# Create list of tasks to run, preserving order
task_names = []
for arg in options.tasks:
matches = [
t for t in self.tasks
if fnmatch.fnmatchcase(str(t).lower(), arg.lower())
]
if not matches:
msg = '`%s` does not match any tasks' % arg
log.error(msg)
if output:
output.write(msg)
continue
task_names.extend(m for m in matches
if m not in task_names)
# Set the option as a list of matching task names so plugins can use it easily
options.tasks = task_names
# TODO: 1.2 This is a hack to make task priorities work still, not sure if it's the best one
task_names = sorted(
task_names,
key=lambda t: self.config['tasks'][t].get('priority', 65535))
finished_events = []
for task_name in task_names:
task = Task(self,
task_name,
options=options,
output=output,
loglevel=loglevel,
priority=priority)
self.task_queue.put(task)
finished_events.append((task.id, task.name, task.finished_event))
return finished_events
def start(self):
"""
Starting point when executing from commandline, dispatch execution to correct destination.
If there is a FlexGet process with an ipc server already running, the command will be sent there for execution
and results will be streamed back.
If not, this will attempt to obtain a lock, initialize the manager, and run the command here.
"""
# When we are in test mode, we use a different lock file and db
if self.options.test:
self.lockfile = os.path.join(self.config_base,
'.test-%s-lock' % self.config_name)
# If another process is started, send the execution to the running process
ipc_info = self.check_ipc_info()
if ipc_info:
console(
'There is a FlexGet process already running for this config, sending execution there.'
)
log.debug('Sending command to running FlexGet process: %s' %
self.args)
try:
client = IPCClient(ipc_info['port'], ipc_info['password'])
except ValueError as e:
log.error(e)
else:
try:
client.handle_cli(self.args)
except KeyboardInterrupt:
log.error(
'Disconnecting from daemon due to ctrl-c. Executions will still continue in the '
'background.')
except EOFError:
log.error('Connection from daemon was severed.')
return
if self.options.test:
log.info('Test mode, creating a copy from database ...')
db_test_filename = os.path.join(
self.config_base, 'test-%s.sqlite' % self.config_name)
if os.path.exists(self.db_filename):
shutil.copy(self.db_filename, db_test_filename)
log.info('Test database created')
self.db_filename = db_test_filename
# No running process, we start our own to handle command
with self.acquire_lock():
self.initialize()
self.handle_cli()
self._shutdown()
def handle_cli(self, options=None):
"""
Dispatch a cli command to the appropriate function.
* :meth:`.execute_command`
* :meth:`.daemon_command`
* CLI plugin callback function
The manager should have a lock and be initialized before calling this method.
:param options: argparse options for command. Defaults to options that manager was instantiated with.
"""
if not options:
options = self.options
command = options.cli_command
command_options = getattr(options, command)
# First check for built-in commands
if command in ['execute', 'daemon']:
if command == 'execute':
self.execute_command(command_options)
elif command == 'daemon':
self.daemon_command(command_options)
else:
# Otherwise dispatch the command to the callback function
options.cli_command_callback(self, command_options)
def execute_command(self, options):
"""
Handles the 'execute' CLI command.
If there is already a task queue running in this process, adds the execution to the queue.
If FlexGet is being invoked with this command, starts up a task queue and runs the execution.
Fires events:
* manager.execute.started
* manager.execute.completed
:param options: argparse options
"""
fire_event('manager.execute.started', self, options)
if self.task_queue.is_alive() or self.is_daemon:
if not self.task_queue.is_alive():
log.error(
'Task queue has died unexpectedly. Restarting it. Please open an issue on Github and include'
' any previous error logs.')
self.task_queue = TaskQueue()
self.task_queue.start()
if len(self.task_queue):
log.verbose(
'There is a task already running, execution queued.')
finished_events = self.execute(
options,
output=logger.get_capture_stream(),
loglevel=logger.get_capture_loglevel())
if not options.cron:
# Wait until execution of all tasks has finished
for _, _, event in finished_events:
event.wait()
else:
self.task_queue.start()
self.ipc_server.start()
self.execute(options)
self.shutdown(finish_queue=True)
self.task_queue.wait()
fire_event('manager.execute.completed', self, options)
def daemon_command(self, options):
"""
Handles the 'daemon' CLI command.
Fires events:
* manager.daemon.started
* manager.daemon.completed
:param options: argparse options
"""
# Import API so it can register to daemon.started event
if options.action == 'start':
if self.is_daemon:
log.error('Daemon already running for this config.')
return
elif self.task_queue.is_alive():
log.error(
'Non-daemon execution of FlexGet is running. Cannot start daemon until it is finished.'
)
return
if options.daemonize:
self.daemonize()
if options.autoreload_config:
self.autoreload_config = True
try:
signal.signal(signal.SIGTERM, self._handle_sigterm)
except ValueError as e:
# If flexget is being called from another script, e.g. windows service helper, and we are not the
# main thread, this error will occur.
log.debug('Error registering sigterm handler: %s' % e)
self.is_daemon = True
fire_event('manager.daemon.started', self)
self.task_queue.start()
self.ipc_server.start()
self.task_queue.wait()
fire_event('manager.daemon.completed', self)
elif options.action in ['stop', 'reload-config', 'status']:
if not self.is_daemon:
log.error('There does not appear to be a daemon running.')
return
if options.action == 'status':
log.info('Daemon running. (PID: %s)' % os.getpid())
elif options.action == 'stop':
tasks = 'all queued tasks (if any) have' if options.wait else 'currently running task (if any) has'
log.info(
'Daemon shutdown requested. Shutdown will commence when %s finished executing.'
% tasks)
self.shutdown(options.wait)
elif options.action == 'reload-config':
log.info('Reloading config from disk.')
try:
self.load_config()
except ValueError as e:
log.error('Error loading config: %s' % e.args[0])
else:
log.info('Config successfully reloaded from disk.')
def _handle_sigterm(self, signum, frame):
log.info('Got SIGTERM. Shutting down.')
self.shutdown(finish_queue=False)
def setup_yaml(self):
"""Sets up the yaml loader to return unicode objects for strings by default"""
def construct_yaml_str(self, node):
# Override the default string handling function
# to always return unicode objects
return self.construct_scalar(node)
yaml.Loader.add_constructor(u'tag:yaml.org,2002:str',
construct_yaml_str)
yaml.SafeLoader.add_constructor(u'tag:yaml.org,2002:str',
construct_yaml_str)
# Set up the dumper to not tag every string with !!python/unicode
def unicode_representer(dumper, uni):
node = yaml.ScalarNode(tag=u'tag:yaml.org,2002:str', value=uni)
return node
yaml.add_representer(str, unicode_representer)
# Set up the dumper to increase the indent for lists
def increase_indent_wrapper(func):
def increase_indent(self, flow=False, indentless=False):
func(self, flow, False)
return increase_indent
yaml.Dumper.increase_indent = increase_indent_wrapper(
yaml.Dumper.increase_indent)
yaml.SafeDumper.increase_indent = increase_indent_wrapper(
yaml.SafeDumper.increase_indent)
def find_config(self, create=False):
"""
Find the configuration file.
:param bool create: If a config file is not found, and create is True, one will be created in the home folder
:raises: `IOError` when no config file could be found, and `create` is False.
"""
home_path = os.path.join(os.path.expanduser('~'), '.flexget')
options_config = os.path.expanduser(self.options.config)
possible = []
if os.path.isabs(options_config):
# explicit path given, don't try anything
config = options_config
possible = [config]
else:
log.debug('Figuring out config load paths')
try:
possible.append(os.getcwd())
except OSError:
log.debug(
'current directory invalid, not searching for config there'
)
# for virtualenv / dev sandbox
if hasattr(sys, 'real_prefix'):
log.debug('Adding virtualenv path')
possible.append(sys.prefix)
# normal lookup locations
possible.append(home_path)
if sys.platform.startswith('win'):
# On windows look in ~/flexget as well, as explorer does not let you create a folder starting with a dot
home_path = os.path.join(os.path.expanduser('~'), 'flexget')
possible.append(home_path)
else:
# The freedesktop.org standard config location
xdg_config = os.environ.get(
'XDG_CONFIG_HOME',
os.path.join(os.path.expanduser('~'), '.config'))
possible.append(os.path.join(xdg_config, 'flexget'))
for path in possible:
config = os.path.join(path, options_config)
if os.path.exists(config):
log.debug('Found config: %s' % config)
break
else:
config = None
if create and not (config and os.path.exists(config)):
config = os.path.join(home_path, options_config)
log.info('Config file %s not found. Creating new config %s' %
(options_config, config))
with open(config, 'w') as newconfig:
# Write empty tasks to the config
newconfig.write(yaml.dump({'tasks': {}}))
elif not config:
log.critical('Failed to find configuration file %s' %
options_config)
log.info('Tried to read from: %s' % ', '.join(possible))
raise IOError('No configuration file found.')
if not os.path.isfile(config):
raise IOError('Config `%s` does not appear to be a file.' % config)
log.debug('Config file %s selected' % config)
self.config_path = config
self.config_name = os.path.splitext(os.path.basename(config))[0]
self.config_base = os.path.normpath(os.path.dirname(config))
self.lockfile = os.path.join(self.config_base,
'.%s-lock' % self.config_name)
self.db_filename = os.path.join(self.config_base,
'db-%s.sqlite' % self.config_name)
def hash_config(self):
if not self.config_path:
return
sha1_hash = hashlib.sha1()
with io.open(self.config_path, 'rb') as f:
while True:
data = f.read(65536)
if not data:
break
sha1_hash.update(data)
return sha1_hash.hexdigest()
def load_config(self, output_to_console=True, config_file_hash=None):
"""
Loads the config file from disk, validates and activates it.
:raises: `ValueError` if there is a problem loading the config file
"""
fire_event('manager.before_config_load', self)
with io.open(self.config_path, 'r', encoding='utf-8') as f:
try:
raw_config = f.read()
except UnicodeDecodeError:
log.critical('Config file must be UTF-8 encoded.')
raise ValueError('Config file is not UTF-8 encoded')
try:
self.config_file_hash = config_file_hash or self.hash_config()
config = yaml.safe_load(raw_config) or {}
except Exception as e:
msg = str(e).replace('\n', ' ')
msg = ' '.join(msg.split())
log.critical(msg, exc_info=False)
if output_to_console:
print('')
print('-' * 79)
print(
' Malformed configuration file (check messages above). Common reasons:'
)
print('-' * 79)
print('')
print(' o Indentation error')
print(' o Missing : from end of the line')
print(' o Non ASCII characters (use UTF8)')
print(
' o If text contains any of :[]{}% characters it must be single-quoted '
'(eg. value{1} should be \'value{1}\')\n')
# Not very good practice but we get several kind of exceptions here, I'm not even sure all of them
# At least: ReaderError, YmlScannerError (or something like that)
if hasattr(e, 'problem') and hasattr(
e, 'context_mark') and hasattr(e, 'problem_mark'):
lines = 0
if e.problem is not None:
print(' Reason: %s\n' % e.problem)
if e.problem == 'mapping values are not allowed here':
print(
' ----> MOST LIKELY REASON: Missing : from end of the line!'
)
print('')
if e.context_mark is not None:
print(' Check configuration near line %s, column %s' %
(e.context_mark.line, e.context_mark.column))
lines += 1
if e.problem_mark is not None:
print(' Check configuration near line %s, column %s' %
(e.problem_mark.line, e.problem_mark.column))
lines += 1
if lines:
print('')
if lines == 1:
print(
' Fault is almost always in this or previous line\n'
)
if lines == 2:
print(
' Fault is almost always in one of these lines or previous ones\n'
)
# When --debug escalate to full stacktrace
if self.options.debug or not output_to_console:
raise
raise ValueError('Config file is not valid YAML')
# config loaded successfully
log.debug('config_name: %s' % self.config_name)
log.debug('config_base: %s' % self.config_base)
# Install the newly loaded config
self.update_config(config)
def update_config(self, config):
"""
Provide a new config for the manager to use.
:raises: `ValueError` and rolls back to previous config if the provided config is not valid.
"""
new_user_config = config
old_config = self.config
try:
self.config = self.validate_config(config)
except ValueError as e:
for error in getattr(e, 'errors', []):
log.critical('[%s] %s', error.json_pointer, error.message)
log.debug('invalid config, rolling back')
self.config = old_config
raise
log.debug('New config data loaded.')
self.user_config = copy.deepcopy(new_user_config)
fire_event('manager.config_updated', self)
def backup_config(self):
backup_path = os.path.join(
self.config_base, '%s-%s.bak' %
(self.config_name, datetime.now().strftime('%y%m%d%H%M%S')))
log.debug('backing up old config to %s before new save' % backup_path)
try:
shutil.copy(self.config_path, backup_path)
except (OSError, IOError) as e:
log.warning('Config backup creation failed: %s', str(e))
raise
return backup_path
def save_config(self):
"""Dumps current config to yaml config file"""
# TODO: Only keep x number of backups..
# Back up the user's current config before overwriting
try:
self.backup_config()
except (OSError, IOError):
return
with open(self.config_path, 'w') as config_file:
config_file.write(
yaml.dump(self.user_config, default_flow_style=False))
def config_changed(self):
"""Makes sure that all tasks will have the config_modified flag come out true on the next run.
Useful when changing the db and all tasks need to be completely reprocessed."""
from flexget.task import config_changed
config_changed()
fire_event('manager.config_updated', self)
def validate_config(self, config=None):
"""
Check all root level keywords are valid. Config may be modified by before_config_validate hooks. Modified
config will be returned.
:param config: Config to check. If not provided, current manager config will be checked.
:raises: `ValueError` when config fails validation. There will be an `errors` attribute with the schema errors.
:returns: Final validated config.
"""
if not config:
config = self.config
config = fire_event('manager.before_config_validate', config, self)
errors = config_schema.process_config(config)
if errors:
err = ValueError('Did not pass schema validation.')
err.errors = errors
raise err
else:
return config
def init_sqlalchemy(self):
"""Initialize SQLAlchemy"""
try:
if [int(part)
for part in sqlalchemy.__version__.split('.')] < [0, 7, 0]:
print(
'FATAL: SQLAlchemy 0.7.0 or newer required. Please upgrade your SQLAlchemy.',
file=sys.stderr)
sys.exit(1)
except ValueError as e:
log.critical(
'Failed to check SQLAlchemy version, you may need to upgrade it'
)
# SQLAlchemy
if self.database_uri is None:
# in case running on windows, needs double \\
filename = self.db_filename.replace('\\', '\\\\')
self.database_uri = 'sqlite:///%s' % filename
if self.db_filename and not os.path.exists(self.db_filename):
log.verbose('Creating new database %s - DO NOT INTERUPT ...' %
self.db_filename)
# fire up the engine
log.debug('Connecting to: %s' % self.database_uri)
try:
self.engine = sqlalchemy.create_engine(self.database_uri,
echo=self.options.debug_sql,
connect_args={
'check_same_thread':
False,
'timeout': 10
})
except ImportError as e:
print(
'FATAL: Unable to use SQLite. Are you running Python 2.7, 3.3 or newer ?\n'
'Python should normally have SQLite support built in.\n'
'If you\'re running correct version of Python then it is not equipped with SQLite.\n'
'You can try installing `pysqlite`. If you have compiled python yourself, '
'recompile it with SQLite support.\n'
'Error: %s' % e,
file=sys.stderr)
sys.exit(1)
Session.configure(bind=self.engine)
# create all tables, doesn't do anything to existing tables
try:
Base.metadata.create_all(bind=self.engine)
except OperationalError as e:
if os.path.exists(self.db_filename):
print('%s - make sure you have write permissions to file %s' %
(e.message, self.db_filename),
file=sys.stderr)
else:
print(
'%s - make sure you have write permissions to directory %s'
% (e.message, self.config_base),
file=sys.stderr)
raise
def _read_lock(self):
"""
Read the values from the lock file. Returns None if there is no current lock file.
"""
if self.lockfile and os.path.exists(self.lockfile):
result = {}
with io.open(self.lockfile, encoding='utf-8') as f:
lines = [l for l in f.readlines() if l]
for line in lines:
try:
key, value = line.split(':', 1)
except ValueError:
log.debug('Invalid line in lock file: %s' % line)
continue
result[key.strip().lower()] = value.strip()
for key in result:
if result[key].isdigit():
result[key] = native_int(result[key])
result.setdefault('pid', None)
if not result['pid']:
log.error(
'Invalid lock file. Make sure FlexGet is not running, then delete it.'
)
elif not pid_exists(result['pid']):
return None
return result
return None
def check_lock(self):
"""Returns True if there is a lock on the database."""
lock_info = self._read_lock()
if not lock_info:
return False
# Don't count it if we hold the lock
if os.getpid() == lock_info['pid']:
return False
return True
def check_ipc_info(self):
"""If a daemon has a lock on the database, return info to connect to IPC."""
lock_info = self._read_lock()
if lock_info and 'port' in lock_info:
return lock_info
return None
@contextmanager
def acquire_lock(self, event=True):
"""
:param bool event: If True, the 'manager.lock_acquired' event will be fired after a lock is obtained
"""
acquired = False
try:
# Don't do anything if we already have a lock. This means only the outermost call will release the lock file
if not self._has_lock:
# Exit if there is an existing lock.
if self.check_lock():
with io.open(self.lockfile, encoding='utf-8') as f:
pid = f.read()
print('Another process (%s) is running, will exit.' %
pid.split('\n')[0],
file=sys.stderr)
print(
'If you\'re sure there is no other instance running, delete %s'
% self.lockfile,
file=sys.stderr)
sys.exit(1)
self._has_lock = True
self.write_lock()
acquired = True
if event:
fire_event('manager.lock_acquired', self)
yield
finally:
if acquired:
self.release_lock()
self._has_lock = False
def write_lock(self, ipc_info=None):
assert self._has_lock
with io.open(self.lockfile, 'w', encoding='utf-8') as f:
f.write('PID: %s\n' % os.getpid())
if ipc_info:
for key in sorted(ipc_info):
f.write('%s: %s\n' % (key, ipc_info[key]))
def release_lock(self):
if os.path.exists(self.lockfile):
os.remove(self.lockfile)
log.debug('Removed %s' % self.lockfile)
else:
log.debug('Lockfile %s not found' % self.lockfile)
def daemonize(self):
"""Daemonizes the current process. Returns the new pid"""
if sys.platform.startswith('win'):
log.error('Cannot daemonize on windows')
return
if threading.activeCount() != 1:
log.critical('There are %r active threads. '
'Daemonizing now may cause strange failures.' %
threading.enumerate())
log.info('Daemonizing...')
try:
pid = os.fork()
if pid > 0:
# Don't run the exit handlers on the parent
atexit._exithandlers = []
# exit first parent
sys.exit(0)
except OSError as e:
sys.stderr.write('fork #1 failed: %d (%s)\n' %
(e.errno, e.strerror))
sys.exit(1)
# decouple from parent environment
os.chdir('/')
os.setsid()
os.umask(0)
# do second fork
try:
pid = os.fork()
if pid > 0:
# Don't run the exit handlers on the parent
atexit._exithandlers = []
# exit from second parent
sys.exit(0)
except OSError as e:
sys.stderr.write('fork #2 failed: %d (%s)\n' %
(e.errno, e.strerror))
sys.exit(1)
log.info('Daemonize complete. New PID: %s' % os.getpid())
# redirect standard file descriptors
sys.stdout.flush()
sys.stderr.flush()
si = open(os.devnull, 'r')
so = open(os.devnull, 'ab+')
se = open(os.devnull, 'ab+', 0)
os.dup2(si.fileno(), sys.stdin.fileno())
os.dup2(so.fileno(), sys.stdout.fileno())
os.dup2(se.fileno(), sys.stderr.fileno())
# If we have a lock, update the lock file with our new pid
if self._has_lock:
self.write_lock()
def db_cleanup(self, force=False):
"""
Perform database cleanup if cleanup interval has been met.
Fires events:
* manager.db_cleanup
If interval was met. Gives session to do the cleanup as a parameter.
:param bool force: Run the cleanup no matter whether the interval has been met.
"""
expired = self.persist.get('last_cleanup', datetime(
1900, 1, 1)) < datetime.now() - DB_CLEANUP_INTERVAL
if force or expired:
log.info('Running database cleanup.')
with Session() as session:
fire_event('manager.db_cleanup', self, session)
# Just in case some plugin was overzealous in its cleaning, mark the config changed
self.config_changed()
self.persist['last_cleanup'] = datetime.now()
else:
log.debug('Not running db cleanup, last run %s' %
self.persist.get('last_cleanup'))
def shutdown(self, finish_queue=True):
"""
Request manager shutdown.
:param bool finish_queue: Should scheduler finish the task queue
"""
if not self.initialized:
raise RuntimeError(
'Cannot shutdown manager that was never initialized.')
fire_event('manager.shutdown_requested', self)
self.task_queue.shutdown(finish_queue)
def _shutdown(self):
"""Runs when the manager is done processing everything."""
if self.ipc_server:
self.ipc_server.shutdown()
fire_event('manager.shutdown', self)
if not self.unit_test: # don't scroll "nosetests" summary results when logging is enabled
log.debug('Shutting down')
self.engine.dispose()
# remove temporary database used in test mode
if self.options.test:
if 'test' not in self.db_filename:
raise Exception('trying to delete non test database?')
if self._has_lock:
os.remove(self.db_filename)
log.info('Removed test database')
global manager
manager = None
def crash_report(self):
"""
This should be called when handling an unexpected exception. Will create a new log file containing the last 50
debug messages as well as the crash traceback.
"""
if not self.unit_test:
filename = os.path.join(
self.config_base,
datetime.now().strftime('crash_report.%Y.%m.%d.%H%M%S%f.log'))
with codecs.open(filename, 'w', encoding='utf-8') as outfile:
outfile.writelines(logger.debug_buffer)
traceback.print_exc(file=outfile)
log.critical(
'An unexpected crash has occurred. Writing crash report to %s. '
'Please verify you are running the latest version of flexget by using "flexget -V" '
'from CLI or by using version_checker plugin'
' at http://flexget.com/wiki/Plugins/version_checker. You are currently using'
' version %s', filename, get_current_flexget_version())
log.debug('Traceback:', exc_info=True)
return traceback.format_exc()
class Manager(object):
"""Manager class for FlexGet
Fires events:
* manager.initialize
The first time the manager is initialized, before config is loaded
* manager.before_config_load
Before the config file is loaded from disk
* manager.before_config_validate
When updating the config, before the validator is run on it
* manager.config_updated
After a configuration file has been loaded or changed (and validated) this event is fired
* manager.startup
After manager has been initialized. This is when application becomes ready to use, however no database lock is
present, so the database must not be modified on this event.
* manager.lock_acquired
The manager does not always require a lock on startup, if one is requested, this event will run when it has been
acquired successfully
* manager.upgrade
If any plugins have declared a newer schema version than exists in the database, this event will be fired to
allow plugins to upgrade their tables
* manager.shutdown_requested
When shutdown has been requested. Any plugins which might add to execution queue should stop when this is fired.
* manager.shutdown
When the manager is exiting
* manager.execute.completed
If execution in current process was completed
* manager.daemon.started
* manager.daemon.completed
* manager.db_cleanup
"""
unit_test = False
options = None
def __init__(self, args):
"""
:param args: CLI args
"""
global manager
if not self.unit_test:
assert not manager, 'Only one instance of Manager should be created at a time!'
elif manager:
log.info('last manager was not torn down correctly')
if args is None:
# Decode all arguments to unicode before parsing
args = unicode_argv()[1:]
self.args = args
self.config_base = None
self.config_name = None
self.config_path = None
self.db_filename = None
self.engine = None
self.lockfile = None
self.database_uri = None
self.db_upgraded = False
self._has_lock = False
self.is_daemon = False
self.ipc_server = None
self.task_queue = None
self.persist = None
self.initialized = False
self.config = {}
if '--help' in args or '-h' in args:
# TODO: This is a bit hacky, but we can't call parse on real arguments when --help is used because it will
# cause a system exit before plugins are loaded and print incomplete help. This will get us a default
# options object and we'll parse the real args later, or send them to daemon. #2807
self.options, extra = CoreArgumentParser().parse_known_args(['execute'])
else:
try:
self.options, extra = CoreArgumentParser().parse_known_args(args)
except ParserError:
try:
# If a non-built-in command was used, we need to parse with a parser that doesn't define the subparsers
self.options, extra = manager_parser.parse_known_args(args)
except ParserError as e:
manager_parser.print_help()
print('\nError: %s' % e.message)
sys.exit(1)
try:
self.find_config(create=False)
except:
logger.start(level=self.options.loglevel.upper(), to_file=False)
raise
else:
log_file = os.path.expanduser(self.options.logfile)
# If an absolute path is not specified, use the config directory.
if not os.path.isabs(log_file):
log_file = os.path.join(self.config_base, log_file)
logger.start(log_file, self.options.loglevel.upper(), to_console=not self.options.cron)
manager = self
log.debug('sys.defaultencoding: %s' % sys.getdefaultencoding())
log.debug('sys.getfilesystemencoding: %s' % sys.getfilesystemencoding())
log.debug('os.path.supports_unicode_filenames: %s' % os.path.supports_unicode_filenames)
if codecs.lookup(sys.getfilesystemencoding()).name == 'ascii' and not os.path.supports_unicode_filenames:
log.warning('Your locale declares ascii as the filesystem encoding. Any plugins reading filenames from '
'disk will not work properly for filenames containing non-ascii characters. Make sure your '
'locale env variables are set up correctly for the environment which is launching FlexGet.')
def initialize(self):
"""
Load plugins, database, and config. Also initializes (but does not start) the task queue and ipc server.
This should only be called after obtaining a lock.
"""
if self.initialized:
raise RuntimeError('Cannot call initialize on an already initialized manager.')
plugin.load_plugins(extra_dirs=[os.path.join(self.config_base, 'plugins')])
# Reparse CLI options now that plugins are loaded
if not self.args:
self.args = ['--help']
self.options = get_parser().parse_args(self.args)
self.task_queue = TaskQueue()
self.ipc_server = IPCServer(self, self.options.ipc_port)
self.setup_yaml()
self.init_sqlalchemy()
fire_event('manager.initialize', self)
try:
self.load_config()
except ValueError as e:
log.critical('Failed to load config file: %s' % e.args[0])
raise
# cannot be imported at module level because of circular references
from flexget.utils.simple_persistence import SimplePersistence
self.persist = SimplePersistence('manager')
if db_schema.upgrade_required():
log.info('Database upgrade is required. Attempting now.')
fire_event('manager.upgrade', self)
if manager.db_upgraded:
fire_event('manager.db_upgraded', self)
fire_event('manager.startup', self)
self.initialized = True
@property
def tasks(self):
"""A list of tasks in the config"""
if not self.config:
return []
return list(self.config.get('tasks', {}).keys())
@property
def has_lock(self):
return self._has_lock
def execute(self, options=None, output=None, loglevel=None, priority=1):
"""
Run all (can be limited with options) tasks from the config.
:param options: Either an :class:`argparse.Namespace` instance, or a dict, containing options for execution
:param output: If a file-like object is specified here, log messages and stdout from the execution will be
written to it.
:param priority: If there are other executions waiting to be run, they will be run in priority order,
lowest first.
:returns: a list of :class:`threading.Event` instances which will be
set when each respective task has finished running
"""
if options is None:
options = copy.copy(self.options.execute)
elif isinstance(options, dict):
options_namespace = copy.copy(self.options.execute)
options_namespace.__dict__.update(options)
options = options_namespace
task_names = self.tasks
# Handle --tasks
if options.tasks:
# Consider * the same as not specifying tasks at all (makes sure manual plugin still works)
if options.tasks == ['*']:
options.tasks = None
else:
# Create list of tasks to run, preserving order
task_names = []
for arg in options.tasks:
matches = [t for t in self.tasks if fnmatch.fnmatchcase(str(t).lower(), arg.lower())]
if not matches:
msg = '`%s` does not match any tasks' % arg
log.error(msg)
if output:
output.write(msg)
continue
task_names.extend(m for m in matches if m not in task_names)
# Set the option as a list of matching task names so plugins can use it easily
options.tasks = task_names
# TODO: 1.2 This is a hack to make task priorities work still, not sure if it's the best one
task_names = sorted(task_names, key=lambda t: self.config['tasks'][t].get('priority', 65535))
finished_events = []
for task_name in task_names:
task = Task(self, task_name, options=options, output=output, loglevel=loglevel, priority=priority)
self.task_queue.put(task)
finished_events.append((task.id, task.name, task.finished_event))
return finished_events
def start(self):
"""
Starting point when executing from commandline, dispatch execution to correct destination.
If there is a FlexGet process with an ipc server already running, the command will be sent there for execution
and results will be streamed back.
If not, this will attempt to obtain a lock, initialize the manager, and run the command here.
"""
# When we are in test mode, we use a different lock file and db
if self.options.test:
self.lockfile = os.path.join(self.config_base, '.test-%s-lock' % self.config_name)
# If another process is started, send the execution to the running process
ipc_info = self.check_ipc_info()
if ipc_info:
logger.console('There is a FlexGet process already running for this config, sending execution there.')
log.debug('Sending command to running FlexGet process: %s' % self.args)
try:
client = IPCClient(ipc_info['port'], ipc_info['password'])
except ValueError as e:
log.error(e)
else:
try:
client.handle_cli(self.args)
except KeyboardInterrupt:
log.error('Disconnecting from daemon due to ctrl-c. Executions will still continue in the '
'background.')
except EOFError:
log.error('Connection from daemon was severed.')
return
if self.options.test:
log.info('Test mode, creating a copy from database ...')
db_test_filename = os.path.join(self.config_base, 'test-%s.sqlite' % self.config_name)
if os.path.exists(self.db_filename):
shutil.copy(self.db_filename, db_test_filename)
log.info('Test database created')
self.db_filename = db_test_filename
# No running process, we start our own to handle command
with self.acquire_lock():
self.initialize()
self.handle_cli()
self._shutdown()
def handle_cli(self, options=None):
"""
Dispatch a cli command to the appropriate function.
* :meth:`.execute_command`
* :meth:`.daemon_command`
* CLI plugin callback function
The manager should have a lock and be initialized before calling this method.
:param options: argparse options for command. Defaults to options that manager was instantiated with.
"""
if not options:
options = self.options
command = options.cli_command
command_options = getattr(options, command)
# First check for built-in commands
if command in ['execute', 'daemon']:
if command == 'execute':
self.execute_command(command_options)
elif command == 'daemon':
self.daemon_command(command_options)
else:
# Otherwise dispatch the command to the callback function
options.cli_command_callback(self, command_options)
def execute_command(self, options):
"""
Handles the 'execute' CLI command.
If there is already a task queue running in this process, adds the execution to the queue.
If FlexGet is being invoked with this command, starts up a task queue and runs the execution.
Fires events:
* manager.execute.started
* manager.execute.completed
:param options: argparse options
"""
fire_event('manager.execute.started', self, options)
if self.task_queue.is_alive():
if len(self.task_queue):
log.verbose('There is a task already running, execution queued.')
finished_events = self.execute(options, output=logger.get_capture_stream(),
loglevel=logger.get_capture_loglevel())
if not options.cron:
# Wait until execution of all tasks has finished
for task_id, task_name, event in finished_events:
event.wait()
else:
self.task_queue.start()
self.ipc_server.start()
self.execute(options)
self.shutdown(finish_queue=True)
self.task_queue.wait()
fire_event('manager.execute.completed', self, options)
def daemon_command(self, options):
"""
Handles the 'daemon' CLI command.
Fires events:
* manager.daemon.started
* manager.daemon.completed
:param options: argparse options
"""
# Import API so it can register to daemon.started event
if options.action == 'start':
if self.is_daemon:
log.error('Daemon already running for this config.')
return
elif self.task_queue.is_alive():
log.error('Non-daemon execution of FlexGet is running. Cannot start daemon until it is finished.')
return
if options.daemonize:
self.daemonize()
try:
signal.signal(signal.SIGTERM, self._handle_sigterm)
except ValueError as e:
# If flexget is being called from another script, e.g. windows service helper, and we are not the
# main thread, this error will occur.
log.debug('Error registering sigterm handler: %s' % e)
self.is_daemon = True
fire_event('manager.daemon.started', self)
self.task_queue.start()
self.ipc_server.start()
self.task_queue.wait()
fire_event('manager.daemon.completed', self)
elif options.action in ['stop', 'reload', 'status']:
if not self.is_daemon:
log.error('There does not appear to be a daemon running.')
return
if options.action == 'status':
log.info('Daemon running. (PID: %s)' % os.getpid())
elif options.action == 'stop':
tasks = 'all queued tasks (if any) have' if options.wait else 'currently running task (if any) has'
log.info('Daemon shutdown requested. Shutdown will commence when %s finished executing.' % tasks)
self.shutdown(options.wait)
elif options.action == 'reload':
log.info('Reloading config from disk.')
try:
self.load_config()
except ValueError as e:
log.error('Error loading config: %s' % e.args[0])
else:
log.info('Config successfully reloaded from disk.')
def _handle_sigterm(self, signum, frame):
log.info('Got SIGTERM. Shutting down.')
self.shutdown(finish_queue=False)
def setup_yaml(self):
"""Sets up the yaml loader to return unicode objects for strings by default"""
def construct_yaml_str(self, node):
# Override the default string handling function
# to always return unicode objects
return self.construct_scalar(node)
yaml.Loader.add_constructor(u'tag:yaml.org,2002:str', construct_yaml_str)
yaml.SafeLoader.add_constructor(u'tag:yaml.org,2002:str', construct_yaml_str)
# Set up the dumper to not tag every string with !!python/unicode
def unicode_representer(dumper, uni):
node = yaml.ScalarNode(tag=u'tag:yaml.org,2002:str', value=uni)
return node
yaml.add_representer(str, unicode_representer)
# Set up the dumper to increase the indent for lists
def increase_indent_wrapper(func):
def increase_indent(self, flow=False, indentless=False):
func(self, flow, False)
return increase_indent
yaml.Dumper.increase_indent = increase_indent_wrapper(yaml.Dumper.increase_indent)
yaml.SafeDumper.increase_indent = increase_indent_wrapper(yaml.SafeDumper.increase_indent)
def find_config(self, create=False):
"""
Find the configuration file.
:param bool create: If a config file is not found, and create is True, one will be created in the home folder
:raises: `IOError` when no config file could be found, and `create` is False.
"""
config = None
home_path = os.path.join(os.path.expanduser('~'), '.flexget')
options_config = os.path.expanduser(self.options.config)
possible = []
if os.path.isabs(options_config):
# explicit path given, don't try anything
config = options_config
possible = [config]
else:
log.debug('Figuring out config load paths')
try:
possible.append(os.getcwd())
except OSError:
log.debug('current directory invalid, not searching for config there')
# for virtualenv / dev sandbox
if hasattr(sys, 'real_prefix'):
log.debug('Adding virtualenv path')
possible.append(sys.prefix)
# normal lookup locations
possible.append(home_path)
if sys.platform.startswith('win'):
# On windows look in ~/flexget as well, as explorer does not let you create a folder starting with a dot
home_path = os.path.join(os.path.expanduser('~'), 'flexget')
possible.append(home_path)
else:
# The freedesktop.org standard config location
xdg_config = os.environ.get('XDG_CONFIG_HOME', os.path.join(os.path.expanduser('~'), '.config'))
possible.append(os.path.join(xdg_config, 'flexget'))
for path in possible:
config = os.path.join(path, options_config)
if os.path.exists(config):
log.debug('Found config: %s' % config)
break
else:
config = None
if create and not (config and os.path.exists(config)):
config = os.path.join(home_path, options_config)
log.info('Config file %s not found. Creating new config %s' % (options_config, config))
with open(config, 'w') as newconfig:
# Write empty tasks to the config
newconfig.write(yaml.dump({'tasks': {}}))
elif not config:
log.critical('Failed to find configuration file %s' % options_config)
log.info('Tried to read from: %s' % ', '.join(possible))
raise IOError('No configuration file found.')
if not os.path.isfile(config):
raise IOError('Config `%s` does not appear to be a file.' % config)
log.debug('Config file %s selected' % config)
self.config_path = config
self.config_name = os.path.splitext(os.path.basename(config))[0]
self.config_base = os.path.normpath(os.path.dirname(config))
self.lockfile = os.path.join(self.config_base, '.%s-lock' % self.config_name)
self.db_filename = os.path.join(self.config_base, 'db-%s.sqlite' % self.config_name)
def load_config(self):
"""
Loads the config file from disk, validates and activates it.
:raises: `ValueError` if there is a problem loading the config file
"""
fire_event('manager.before_config_load', self)
with io.open(self.config_path, 'r', encoding='utf-8') as f:
try:
raw_config = f.read()
except UnicodeDecodeError:
log.critical('Config file must be UTF-8 encoded.')
raise ValueError('Config file is not UTF-8 encoded')
try:
config = yaml.safe_load(raw_config) or {}
except Exception as e:
msg = str(e).replace('\n', ' ')
msg = ' '.join(msg.split())
log.critical(msg, exc_info=False)
print('')
print('-' * 79)
print(' Malformed configuration file (check messages above). Common reasons:')
print('-' * 79)
print('')
print(' o Indentation error')
print(' o Missing : from end of the line')
print(' o Non ASCII characters (use UTF8)')
print(' o If text contains any of :[]{}% characters it must be single-quoted '
'(eg. value{1} should be \'value{1}\')\n')
# Not very good practice but we get several kind of exceptions here, I'm not even sure all of them
# At least: ReaderError, YmlScannerError (or something like that)
if hasattr(e, 'problem') and hasattr(e, 'context_mark') and hasattr(e, 'problem_mark'):
lines = 0
if e.problem is not None:
print(' Reason: %s\n' % e.problem)
if e.problem == 'mapping values are not allowed here':
print(' ----> MOST LIKELY REASON: Missing : from end of the line!')
print('')
if e.context_mark is not None:
print(' Check configuration near line %s, column %s' % (e.context_mark.line, e.context_mark.column))
lines += 1
if e.problem_mark is not None:
print(' Check configuration near line %s, column %s' % (e.problem_mark.line, e.problem_mark.column))
lines += 1
if lines:
print('')
if lines == 1:
print(' Fault is almost always in this or previous line\n')
if lines == 2:
print(' Fault is almost always in one of these lines or previous ones\n')
# When --debug escalate to full stacktrace
if self.options.debug:
raise
raise ValueError('Config file is not valid YAML')
# config loaded successfully
log.debug('config_name: %s' % self.config_name)
log.debug('config_base: %s' % self.config_base)
# Install the newly loaded config
self.update_config(config)
def update_config(self, config):
"""
Provide a new config for the manager to use.
:raises: `ValueError` and rolls back to previous config if the provided config is not valid.
"""
new_user_config = config
old_config = self.config
try:
self.config = self.validate_config(config)
except ValueError as e:
for error in getattr(e, 'errors', []):
log.critical('[%s] %s', error.json_pointer, error.message)
log.debug('invalid config, rolling back')
self.config = old_config
raise
log.debug('New config data loaded.')
self.user_config = copy.deepcopy(new_user_config)
fire_event('manager.config_updated', self)
def save_config(self):
"""Dumps current config to yaml config file"""
# TODO: Only keep x number of backups..
# Back up the user's current config before overwriting
backup_path = os.path.join(self.config_base,
'%s-%s.bak' % (self.config_name, datetime.now().strftime('%y%m%d%H%M%S')))
log.debug('backing up old config to %s before new save' % backup_path)
shutil.copy(self.config_path, backup_path)
with open(self.config_path, 'w') as config_file:
config_file.write(yaml.dump(self.user_config, default_flow_style=False))
def config_changed(self):
"""Makes sure that all tasks will have the config_modified flag come out true on the next run.
Useful when changing the db and all tasks need to be completely reprocessed."""
from flexget.task import config_changed
config_changed()
fire_event('manager.config_updated', self)
def validate_config(self, config=None):
"""
Check all root level keywords are valid. Config may be modified by before_config_validate hooks. Modified
config will be returned.
:param config: Config to check. If not provided, current manager config will be checked.
:raises: `ValueError` when config fails validation. There will be an `errors` attribute with the schema errors.
:returns: Final validated config.
"""
if not config:
config = self.config
config = fire_event('manager.before_config_validate', config, self)
errors = config_schema.process_config(config)
if errors:
err = ValueError('Did not pass schema validation.')
err.errors = errors
raise err
else:
return config
def init_sqlalchemy(self):
"""Initialize SQLAlchemy"""
try:
if [int(part) for part in sqlalchemy.__version__.split('.')] < [0, 7, 0]:
print('FATAL: SQLAlchemy 0.7.0 or newer required. Please upgrade your SQLAlchemy.', file=sys.stderr)
sys.exit(1)
except ValueError as e:
log.critical('Failed to check SQLAlchemy version, you may need to upgrade it')
# SQLAlchemy
if self.database_uri is None:
# in case running on windows, needs double \\
filename = self.db_filename.replace('\\', '\\\\')
self.database_uri = 'sqlite:///%s' % filename
if self.db_filename and not os.path.exists(self.db_filename):
log.verbose('Creating new database %s ...' % self.db_filename)
# fire up the engine
log.debug('Connecting to: %s' % self.database_uri)
try:
self.engine = sqlalchemy.create_engine(self.database_uri,
echo=self.options.debug_sql,
connect_args={'check_same_thread': False, 'timeout': 10})
except ImportError:
print('FATAL: Unable to use SQLite. Are you running Python 2.5 - 2.7 ?\n'
'Python should normally have SQLite support built in.\n'
'If you\'re running correct version of Python then it is not equipped with SQLite.\n'
'You can try installing `pysqlite`. If you have compiled python yourself, '
'recompile it with SQLite support.', file=sys.stderr)
sys.exit(1)
Session.configure(bind=self.engine)
# create all tables, doesn't do anything to existing tables
try:
Base.metadata.create_all(bind=self.engine)
except OperationalError as e:
if os.path.exists(self.db_filename):
print('%s - make sure you have write permissions to file %s' %
(e.message, self.db_filename), file=sys.stderr)
else:
print('%s - make sure you have write permissions to directory %s' %
(e.message, self.config_base), file=sys.stderr)
raise
def _read_lock(self):
"""
Read the values from the lock file. Returns None if there is no current lock file.
"""
if self.lockfile and os.path.exists(self.lockfile):
result = {}
with io.open(self.lockfile, encoding='utf-8') as f:
lines = [l for l in f.readlines() if l]
for line in lines:
try:
key, value = line.split(':', 1)
except ValueError:
log.debug('Invalid line in lock file: %s' % line)
continue
result[key.strip().lower()] = value.strip()
for key in result:
if result[key].isdigit():
result[key] = int(result[key])
result.setdefault('pid', None)
if not result['pid']:
log.error('Invalid lock file. Make sure FlexGet is not running, then delete it.')
elif not pid_exists(result['pid']):
return None
return result
return None
def check_lock(self):
"""Returns True if there is a lock on the database."""
lock_info = self._read_lock()
if not lock_info:
return False
# Don't count it if we hold the lock
if os.getpid() == lock_info['pid']:
return False
return True
def check_ipc_info(self):
"""If a daemon has a lock on the database, return info to connect to IPC."""
lock_info = self._read_lock()
if lock_info and 'port' in lock_info:
return lock_info
return None
@contextmanager
def acquire_lock(self, event=True):
"""
:param bool event: If True, the 'manager.lock_acquired' event will be fired after a lock is obtained
"""
acquired = False
try:
# Don't do anything if we already have a lock. This means only the outermost call will release the lock file
if not self._has_lock:
# Exit if there is an existing lock.
if self.check_lock():
with io.open(self.lockfile, encoding='utf-8') as f:
pid = f.read()
print('Another process (%s) is running, will exit.' % pid.split('\n')[0], file=sys.stderr)
print('If you\'re sure there is no other instance running, delete %s' % self.lockfile,
file=sys.stderr)
sys.exit(1)
self._has_lock = True
self.write_lock()
acquired = True
if event:
fire_event('manager.lock_acquired', self)
yield
finally:
if acquired:
self.release_lock()
self._has_lock = False
def write_lock(self, ipc_info=None):
assert self._has_lock
with io.open(self.lockfile, 'w', encoding='utf-8') as f:
f.write('PID: %s\n' % os.getpid())
if ipc_info:
for key in sorted(ipc_info):
f.write('%s: %s\n' % (key, ipc_info[key]))
def release_lock(self):
if os.path.exists(self.lockfile):
os.remove(self.lockfile)
log.debug('Removed %s' % self.lockfile)
else:
log.debug('Lockfile %s not found' % self.lockfile)
def daemonize(self):
"""Daemonizes the current process. Returns the new pid"""
if sys.platform.startswith('win'):
log.error('Cannot daemonize on windows')
return
if threading.activeCount() != 1:
log.critical('There are %r active threads. '
'Daemonizing now may cause strange failures.' % threading.enumerate())
log.info('Daemonizing...')
try:
pid = os.fork()
if pid > 0:
# Don't run the exit handlers on the parent
atexit._exithandlers = []
# exit first parent
sys.exit(0)
except OSError as e:
sys.stderr.write('fork #1 failed: %d (%s)\n' % (e.errno, e.strerror))
sys.exit(1)
# decouple from parent environment
os.chdir('/')
os.setsid()
os.umask(0)
# do second fork
try:
pid = os.fork()
if pid > 0:
# Don't run the exit handlers on the parent
atexit._exithandlers = []
# exit from second parent
sys.exit(0)
except OSError as e:
sys.stderr.write('fork #2 failed: %d (%s)\n' % (e.errno, e.strerror))
sys.exit(1)
log.info('Daemonize complete. New PID: %s' % os.getpid())
# redirect standard file descriptors
sys.stdout.flush()
sys.stderr.flush()
si = open(os.devnull, 'r')
so = open(os.devnull, 'ab+')
se = open(os.devnull, 'ab+', 0)
os.dup2(si.fileno(), sys.stdin.fileno())
os.dup2(so.fileno(), sys.stdout.fileno())
os.dup2(se.fileno(), sys.stderr.fileno())
# If we have a lock, update the lock file with our new pid
if self._has_lock:
self.write_lock()
def db_cleanup(self, force=False):
"""
Perform database cleanup if cleanup interval has been met.
Fires events:
* manager.db_cleanup
If interval was met. Gives session to do the cleanup as a parameter.
:param bool force: Run the cleanup no matter whether the interval has been met.
"""
expired = self.persist.get('last_cleanup', datetime(1900, 1, 1)) < datetime.now() - DB_CLEANUP_INTERVAL
if force or expired:
log.info('Running database cleanup.')
with Session() as session:
fire_event('manager.db_cleanup', self, session)
# Just in case some plugin was overzealous in its cleaning, mark the config changed
self.config_changed()
self.persist['last_cleanup'] = datetime.now()
else:
log.debug('Not running db cleanup, last run %s' % self.persist.get('last_cleanup'))
def shutdown(self, finish_queue=True):
"""
Request manager shutdown.
:param bool finish_queue: Should scheduler finish the task queue
"""
if not self.initialized:
raise RuntimeError('Cannot shutdown manager that was never initialized.')
fire_event('manager.shutdown_requested', self)
self.task_queue.shutdown(finish_queue)
def _shutdown(self):
"""Runs when the manager is done processing everything."""
if self.ipc_server:
self.ipc_server.shutdown()
fire_event('manager.shutdown', self)
if not self.unit_test: # don't scroll "nosetests" summary results when logging is enabled
log.debug('Shutting down')
self.engine.dispose()
# remove temporary database used in test mode
if self.options.test:
if 'test' not in self.db_filename:
raise Exception('trying to delete non test database?')
if self._has_lock:
os.remove(self.db_filename)
log.info('Removed test database')
global manager
manager = None
def crash_report(self):
"""
This should be called when handling an unexpected exception. Will create a new log file containing the last 50
debug messages as well as the crash traceback.
"""
if not self.unit_test:
filename = os.path.join(self.config_base, datetime.now().strftime('crash_report.%Y.%m.%d.%H%M%S%f.log'))
with codecs.open(filename, 'w', encoding='utf-8') as outfile:
outfile.writelines(logger.debug_buffer)
traceback.print_exc(file=outfile)
log.critical('An unexpected crash has occurred. Writing crash report to %s. '
'Please verify you are running the latest version of flexget by using "flexget -V" '
'from CLI or by using version_checker plugin'
' at http://flexget.com/wiki/Plugins/version_checker. You are currently using'
' version %s', filename, get_current_flexget_version())
log.debug('Traceback:', exc_info=True)
class Manager(object):
"""Manager class for FlexGet
Fires events:
* manager.startup
After manager has been initialized. This is when application becomes ready to use, however no database lock is
present, so the database must not be modified on this event.
* manager.lock-acquired
The manager does not always require a lock on startup, if one is requested, this event will run when it has been
acquired successfully
* manager.config-loaded
When a valid configuration has been (re)loaded, this event is fired
* manager.upgrade
If any plugins have declared a newer schema version than exists in the database, this event will be fired to
allow plugins to upgrade their tables
* manager.shutdown
When the manager is exiting
* manager.execute.completed
If execution in current process was completed
* manager.daemon.started
* manager.daemon.completed
* manager.db_cleanup
"""
unit_test = False
options = None
def __init__(self, options):
"""
:param options: argparse parsed options object
"""
global manager
assert not manager, 'Only one instance of Manager should be created at a time!'
self.options = options
self.config_base = None
self.config_name = None
self.config_path = None
self.db_filename = None
self.engine = None
self.lockfile = None
self.database_uri = None
self.db_upgraded = False
self._has_lock = False
self.config = {}
self.scheduler = Scheduler(self)
self.ipc_server = IPCServer(self, options.ipc_port)
manager = self
self.initialize()
# cannot be imported at module level because of circular references
from flexget.utils.simple_persistence import SimplePersistence
self.persist = SimplePersistence('manager')
log.debug('sys.defaultencoding: %s' % sys.getdefaultencoding())
log.debug('sys.getfilesystemencoding: %s' % sys.getfilesystemencoding())
log.debug('os.path.supports_unicode_filenames: %s' % os.path.supports_unicode_filenames)
if db_schema.upgrade_required():
log.info('Database upgrade is required. Attempting now.')
# Make sure not to fire the lock-acquired event yet
# TODO: Detect if any database upgrading is needed and acquire the lock only in one place
with self.acquire_lock(event=False):
fire_event('manager.upgrade', self)
if manager.db_upgraded:
fire_event('manager.db_upgraded', self)
fire_event('manager.startup', self)
def __del__(self):
global manager
manager = None
def initialize(self):
"""Separated from __init__ so that unit tests can modify options before loading config."""
self.setup_yaml()
self.find_config(create=(self.options.cli_command == 'webui'))
self.init_sqlalchemy()
fire_event('manager.before_config_load', self)
self.load_config()
fire_event('manager.before_config_validate', self)
errors = self.validate_config()
if errors:
for error in errors:
log.critical("[%s] %s", error.json_pointer, error.message)
self.shutdown(finish_queue=False)
sys.exit(1)
fire_event('manager.config-loaded', self)
@property
def tasks(self):
"""A list of tasks in the config"""
if not self.config:
return []
return self.config.get('tasks', {}).keys()
@property
def has_lock(self):
return self._has_lock
def run_cli_command(self):
"""
Starting point when executing from commandline, dispatch execution
to correct destination.
* :meth:`.execute_command`
* :meth:`.daemon_command`
* :meth:`.webui_command`
* CLI plugin callback function
"""
command = self.options.cli_command
options = getattr(self.options, command)
# First check for built-in commands
if command == 'execute':
self.execute_command(options)
elif command == 'daemon':
self.daemon_command(options)
elif command == 'webui':
self.webui_command(options)
else:
# Otherwise dispatch the command to the callback function
options.cli_command_callback(self, options)
def execute_command(self, options):
"""
Send execute command to daemon through IPC or perform execution
on current process.
Fires events:
* manager.execute.completed
:param options: argparse options
"""
# If a daemon is started, send the execution to the daemon
ipc_info = self.check_ipc_info()
if ipc_info:
client = IPCClient(ipc_info['port'], ipc_info['password'])
client.execute(dict(options))
self.shutdown()
return
# Otherwise we run the execution ourselves
with self.acquire_lock():
fire_event('manager.execute.started', self)
self.scheduler.start(run_schedules=False)
self.scheduler.execute(options)
self.scheduler.shutdown(finish_queue=True)
try:
self.scheduler.wait()
except KeyboardInterrupt:
log.error('Got ctrl-c exiting after this task completes. Press ctrl-c again to abort this task.')
else:
fire_event('manager.execute.completed', self)
self.shutdown(finish_queue=False)
def daemon_command(self, options):
"""
Fires events:
* manager.daemon.started
* manager.daemon.completed
:param options: argparse options
"""
if options.action == 'start':
if options.daemonize:
self.daemonize()
with self.acquire_lock():
signal.signal(signal.SIGTERM, self._handle_sigterm)
self.ipc_server.start()
fire_event('manager.daemon.started', self)
self.scheduler.start()
try:
self.scheduler.wait()
except KeyboardInterrupt:
log.info('Got ctrl-c, shutting down.')
fire_event('manager.daemon.completed', self)
self.shutdown(finish_queue=False)
elif options.action == 'stop':
ipc_info = self.check_ipc_info()
if ipc_info:
client = IPCClient(ipc_info['port'], ipc_info['password'])
client.shutdown()
self.shutdown()
else:
log.error('There does not appear to be a daemon running.')
elif options.action == 'status':
ipc_info = self.check_ipc_info()
if ipc_info:
log.info('Daemon running. (PID: %s)' % ipc_info['pid'])
else:
log.info('No daemon appears to be running for this config.')
def webui_command(self, options):
"""
:param options: argparse options
"""
try:
pkg_resources.require('flexget[webui]')
except pkg_resources.DistributionNotFound as e:
log.error('Dependency not met. %s' % e)
log.error('Webui dependencies not installed. You can use `pip install flexget[webui]` to install them.')
self.shutdown()
return
if options.daemonize:
self.daemonize()
from flexget.ui import webui
with self.acquire_lock():
webui.start(self)
def _handle_sigterm(self, signum, frame):
log.info('Got SIGTERM. Shutting down.')
self.shutdown(finish_queue=False)
def setup_yaml(self):
"""Sets up the yaml loader to return unicode objects for strings by default"""
def construct_yaml_str(self, node):
# Override the default string handling function
# to always return unicode objects
return self.construct_scalar(node)
yaml.Loader.add_constructor(u'tag:yaml.org,2002:str', construct_yaml_str)
yaml.SafeLoader.add_constructor(u'tag:yaml.org,2002:str', construct_yaml_str)
# Set up the dumper to not tag every string with !!python/unicode
def unicode_representer(dumper, uni):
node = yaml.ScalarNode(tag=u'tag:yaml.org,2002:str', value=uni)
return node
yaml.add_representer(unicode, unicode_representer)
# Set up the dumper to increase the indent for lists
def increase_indent_wrapper(func):
def increase_indent(self, flow=False, indentless=False):
func(self, flow, False)
return increase_indent
yaml.Dumper.increase_indent = increase_indent_wrapper(yaml.Dumper.increase_indent)
yaml.SafeDumper.increase_indent = increase_indent_wrapper(yaml.SafeDumper.increase_indent)
def find_config(self, create=False):
"""
Find the configuration file.
:param bool create: If a config file is not found, and create is True, one will be created in the home folder
"""
config = None
home_path = os.path.join(os.path.expanduser('~'), '.flexget')
options_config = os.path.expanduser(self.options.config)
possible = []
if os.path.isabs(options_config):
# explicit path given, don't try anything
config = options_config
possible = [config]
else:
log.debug('Figuring out config load paths')
possible.append(os.getcwd())
# for virtualenv / dev sandbox
if hasattr(sys, 'real_prefix'):
log.debug('Adding virtualenv path')
possible.append(sys.prefix)
# normal lookup locations
possible.append(home_path)
if sys.platform.startswith('win'):
# On windows look in ~/flexget as well, as explorer does not let you create a folder starting with a dot
home_path = os.path.join(os.path.expanduser('~'), 'flexget')
possible.append(home_path)
else:
# The freedesktop.org standard config location
xdg_config = os.environ.get('XDG_CONFIG_HOME', os.path.join(os.path.expanduser('~'), '.config'))
possible.append(os.path.join(xdg_config, 'flexget'))
for path in possible:
config = os.path.join(path, options_config)
if os.path.exists(config):
log.debug('Found config: %s' % config)
break
else:
config = None
if not (config and os.path.exists(config)):
if not create:
log.info('Tried to read from: %s' % ', '.join(possible))
log.critical('Failed to find configuration file %s' % options_config)
sys.exit(1)
config = os.path.join(home_path, options_config)
log.info('Config file %s not found. Creating new config %s' % (options_config, config))
with open(config, 'w') as newconfig:
# Write empty tasks to the config
newconfig.write(yaml.dump({'tasks': {}}))
log.debug('Config file %s selected' % config)
self.config_path = config
self.config_name = os.path.splitext(os.path.basename(config))[0]
self.config_base = os.path.normpath(os.path.dirname(config))
self.lockfile = os.path.join(self.config_base, '.%s-lock' % self.config_name)
def load_config(self):
"""
.. warning::
Calls sys.exit(1) if configuration file could not be loaded.
This is something we probably want to change.
"""
with open(self.config_path, 'rb') as f:
config = f.read()
try:
config = config.decode('utf-8')
except UnicodeDecodeError:
log.critical('Config file must be UTF-8 encoded.')
sys.exit(1)
try:
self.config = yaml.safe_load(config) or {}
except Exception as e:
msg = str(e).replace('\n', ' ')
msg = ' '.join(msg.split())
log.critical(msg)
print('')
print('-' * 79)
print(' Malformed configuration file (check messages above). Common reasons:')
print('-' * 79)
print('')
print(' o Indentation error')
print(' o Missing : from end of the line')
print(' o Non ASCII characters (use UTF8)')
print(' o If text contains any of :[]{}% characters it must be single-quoted ' \
'(eg. value{1} should be \'value{1}\')\n')
# Not very good practice but we get several kind of exceptions here, I'm not even sure all of them
# At least: ReaderError, YmlScannerError (or something like that)
if hasattr(e, 'problem') and hasattr(e, 'context_mark') and hasattr(e, 'problem_mark'):
lines = 0
if e.problem is not None:
print(' Reason: %s\n' % e.problem)
if e.problem == 'mapping values are not allowed here':
print(' ----> MOST LIKELY REASON: Missing : from end of the line!')
print('')
if e.context_mark is not None:
print(' Check configuration near line %s, column %s' % (e.context_mark.line, e.context_mark.column))
lines += 1
if e.problem_mark is not None:
print(' Check configuration near line %s, column %s' % (e.problem_mark.line, e.problem_mark.column))
lines += 1
if lines:
print('')
if lines == 1:
print(' Fault is almost always in this or previous line\n')
if lines == 2:
print(' Fault is almost always in one of these lines or previous ones\n')
# When --debug escalate to full stacktrace
if self.options.debug:
raise
sys.exit(1)
# config loaded successfully
log.debug('config_name: %s' % self.config_name)
log.debug('config_base: %s' % self.config_base)
def save_config(self):
"""Dumps current config to yaml config file"""
config_file = file(os.path.join(self.config_base, self.config_name) + '.yml', 'w')
try:
config_file.write(yaml.dump(self.config, default_flow_style=False))
finally:
config_file.close()
def config_changed(self):
"""Makes sure that all tasks will have the config_modified flag come out true on the next run.
Useful when changing the db and all tasks need to be completely reprocessed."""
from flexget.task import config_changed
for task in self.tasks:
config_changed(task)
def pre_check_config(self, config):
"""Checks configuration file for common mistakes that are easily detectable"""
def get_indentation(line):
i, n = 0, len(line)
while i < n and line[i] == ' ':
i += 1
return i
def isodd(n):
return bool(n % 2)
line_num = 0
duplicates = {}
# flags
prev_indentation = 0
prev_mapping = False
prev_list = True
prev_scalar = True
list_open = False # multiline list with [
for line in config.splitlines():
if '# warnings off' in line.strip().lower():
log.debug('config pre-check warnings off')
break
line_num += 1
# remove linefeed
line = line.rstrip()
# empty line
if line.strip() == '':
continue
# comment line
if line.strip().startswith('#'):
continue
indentation = get_indentation(line)
if prev_scalar:
if indentation <= prev_indentation:
prev_scalar = False
else:
continue
cur_list = line.strip().startswith('-')
# skipping lines as long as multiline compact list is open
if list_open:
if line.strip().endswith(']'):
list_open = False
# print 'closed list at line %s' % line
continue
else:
list_open = line.strip().endswith(': [') or line.strip().endswith(':[')
if list_open:
# print 'list open at line %s' % line
continue
# print '#%i: %s' % (line_num, line)
# print 'indentation: %s, prev_ind: %s, prev_mapping: %s, prev_list: %s, cur_list: %s' % \
# (indentation, prev_indentation, prev_mapping, prev_list, cur_list)
if ':\t' in line:
log.critical('Line %s has TAB character after : character. '
'DO NOT use tab key when editing config!' % line_num)
elif '\t' in line:
log.warning('Line %s has tabs, use only spaces!' % line_num)
if isodd(indentation):
log.warning('Config line %s has odd (uneven) indentation' % line_num)
if indentation > prev_indentation and not prev_mapping:
# line increases indentation, but previous didn't start mapping
log.warning('Config line %s is likely missing \':\' at the end' % (line_num - 1))
if indentation > prev_indentation + 2 and prev_mapping and not prev_list:
# mapping value after non list indented more than 2
log.warning('Config line %s is indented too much' % line_num)
if indentation <= prev_indentation + (2 * (not cur_list)) and prev_mapping and prev_list:
log.warning('Config line %s is not indented enough' % line_num)
if prev_mapping and cur_list:
# list after opening mapping
if indentation < prev_indentation or indentation > prev_indentation + 2 + (2 * prev_list):
log.warning('Config line %s containing list element is indented incorrectly' % line_num)
elif prev_mapping and indentation <= prev_indentation:
# after opening a map, indentation doesn't increase
log.warning('Config line %s is indented incorrectly (previous line ends with \':\')' % line_num)
# notify if user is trying to set same key multiple times in a task (a common mistake)
for level in duplicates.iterkeys():
# when indentation goes down, delete everything indented more than that
if indentation < level:
duplicates[level] = {}
if ':' in line:
name = line.split(':', 1)[0].strip()
ns = duplicates.setdefault(indentation, {})
if name in ns:
log.warning('Trying to set value for `%s` in line %s, but it is already defined in line %s!' %
(name, line_num, ns[name]))
ns[name] = line_num
prev_indentation = indentation
# this line is a mapping (ends with :)
prev_mapping = line[-1] == ':'
prev_scalar = line[-1] in '|>'
# this line is a list
prev_list = line.strip()[0] == '-'
if prev_list:
# This line is in a list, so clear the duplicates,
# as duplicates are not always wrong in a list. see #697
duplicates[indentation] = {}
log.debug('Pre-checked %s configuration lines' % line_num)
def validate_config(self):
"""
Check all root level keywords are valid.
:returns: A list of `ValidationError`s
"""
return config_schema.process_config(self.config)
def init_sqlalchemy(self):
"""Initialize SQLAlchemy"""
try:
if [int(part) for part in sqlalchemy.__version__.split('.')] < [0, 7, 0]:
print('FATAL: SQLAlchemy 0.7.0 or newer required. Please upgrade your SQLAlchemy.', file=sys.stderr)
sys.exit(1)
except ValueError as e:
log.critical('Failed to check SQLAlchemy version, you may need to upgrade it')
# SQLAlchemy
if self.database_uri is None:
self.db_filename = os.path.join(self.config_base, 'db-%s.sqlite' % self.config_name)
if self.options.test:
db_test_filename = os.path.join(self.config_base, 'test-%s.sqlite' % self.config_name)
log.info('Test mode, creating a copy from database ...')
if os.path.exists(self.db_filename):
shutil.copy(self.db_filename, db_test_filename)
self.db_filename = db_test_filename
log.info('Test database created')
# in case running on windows, needs double \\
filename = self.db_filename.replace('\\', '\\\\')
self.database_uri = 'sqlite:///%s' % filename
if self.db_filename and not os.path.exists(self.db_filename):
log.verbose('Creating new database %s ...' % self.db_filename)
# fire up the engine
log.debug('Connecting to: %s' % self.database_uri)
try:
self.engine = sqlalchemy.create_engine(self.database_uri,
echo=self.options.debug_sql,
poolclass=SingletonThreadPool,
connect_args={'check_same_thread': False}) # assert_unicode=True
except ImportError:
print('FATAL: Unable to use SQLite. Are you running Python 2.5 - 2.7 ?\n'
'Python should normally have SQLite support built in.\n'
'If you\'re running correct version of Python then it is not equipped with SQLite.\n'
'You can try installing `pysqlite`. If you have compiled python yourself, '
'recompile it with SQLite support.', file=sys.stderr)
sys.exit(1)
Session.configure(bind=self.engine)
# create all tables, doesn't do anything to existing tables
try:
def before_table_create(event, target, bind, tables=None, **kw):
if tables:
# We need to acquire a lock if we are creating new tables
# TODO: Detect if any database upgrading is needed and acquire the lock only in one place
self.acquire_lock(event=False).__enter__()
Base.metadata.append_ddl_listener('before-create', before_table_create)
Base.metadata.create_all(bind=self.engine)
except OperationalError as e:
if os.path.exists(self.db_filename):
print('%s - make sure you have write permissions to file %s' %
(e.message, self.db_filename), file=sys.stderr)
else:
print('%s - make sure you have write permissions to directory %s' %
(e.message, self.config_base), file=sys.stderr)
raise Exception(e.message)
def _read_lock(self):
"""
Read the values from the lock file. Returns None if there is no current lock file.
"""
if self.lockfile and os.path.exists(self.lockfile):
result = {}
with open(self.lockfile) as f:
lines = [l for l in f.readlines() if l]
for line in lines:
key, value = line.split(b':', 1)
result[key.strip().lower()] = value.strip()
for key in result:
if result[key].isdigit():
result[key] = int(result[key])
if not pid_exists(result['pid']):
return None
return result
return None
def check_lock(self):
"""Returns True if there is a lock on the database."""
lock_info = self._read_lock()
if not lock_info:
return False
# Don't count it if we hold the lock
if os.getpid() == lock_info['pid']:
return False
return True
def check_ipc_info(self):
"""If a daemon has a lock on the database, return info to connect to IPC."""
lock_info = self._read_lock()
if lock_info and 'port' in lock_info:
return lock_info
return None
@contextmanager
def acquire_lock(self, event=True):
"""
:param bool event: If True, the 'manager.lock-acquired' event will be fired after a lock is obtained
"""
acquired = False
try:
# Don't do anything if we already have a lock. This means only the outermost call will release the lock file
if not self._has_lock:
# Exit if there is an existing lock.
if self.check_lock():
with open(self.lockfile) as f:
pid = f.read()
print('Another process (%s) is running, will exit.' % pid.split('\n')[0], file=sys.stderr)
print('If you\'re sure there is no other instance running, delete %s' % self.lockfile,
file=sys.stderr)
sys.exit(1)
self._has_lock = True
self.write_lock()
acquired = True
if event:
fire_event('manager.lock-acquired', self)
yield
finally:
if acquired:
self.release_lock()
self._has_lock = False
def write_lock(self, ipc_info=None):
assert self._has_lock
with open(self.lockfile, 'w') as f:
f.write(b'PID: %s\n' % os.getpid())
if ipc_info:
for key in sorted(ipc_info):
f.write(b'%s: %s\n' % (key, ipc_info[key]))
def release_lock(self):
if os.path.exists(self.lockfile):
os.remove(self.lockfile)
log.debug('Removed %s' % self.lockfile)
else:
log.debug('Lockfile %s not found' % self.lockfile)
def daemonize(self):
"""Daemonizes the current process. Returns the new pid"""
if sys.platform.startswith('win'):
log.error('Cannot daemonize on windows')
return
if threading.activeCount() != 1:
log.critical('There are %r active threads. '
'Daemonizing now may cause strange failures.' % threading.enumerate())
log.info('Daemonizing...')
try:
pid = os.fork()
if pid > 0:
# Don't run the exit handlers on the parent
atexit._exithandlers = []
# exit first parent
sys.exit(0)
except OSError as e:
sys.stderr.write('fork #1 failed: %d (%s)\n' % (e.errno, e.strerror))
sys.exit(1)
# decouple from parent environment
os.chdir('/')
os.setsid()
os.umask(0)
# do second fork
try:
pid = os.fork()
if pid > 0:
# Don't run the exit handlers on the parent
atexit._exithandlers = []
# exit from second parent
sys.exit(0)
except OSError as e:
sys.stderr.write('fork #2 failed: %d (%s)\n' % (e.errno, e.strerror))
sys.exit(1)
log.info('Daemonize complete. New PID: %s' % os.getpid())
# redirect standard file descriptors
sys.stdout.flush()
sys.stderr.flush()
si = file('/dev/null', 'r')
so = file('/dev/null', 'a+')
se = file('/dev/null', 'a+', 0)
os.dup2(si.fileno(), sys.stdin.fileno())
os.dup2(so.fileno(), sys.stdout.fileno())
os.dup2(se.fileno(), sys.stderr.fileno())
def db_cleanup(self, force=False):
"""
Perform database cleanup if cleanup interval has been met.
Fires events:
* manager.db_cleanup
If interval was met. Gives session to do the cleanup as a parameter.
:param bool force: Run the cleanup no matter whether the interval has been met.
"""
expired = self.persist.get('last_cleanup', datetime(1900, 1, 1)) < datetime.now() - DB_CLEANUP_INTERVAL
if force or expired:
log.info('Running database cleanup.')
session = Session()
try:
fire_event('manager.db_cleanup', session)
session.commit()
finally:
session.close()
# Just in case some plugin was overzealous in its cleaning, mark the config changed
self.config_changed()
self.persist['last_cleanup'] = datetime.now()
else:
log.debug('Not running db cleanup, last run %s' % self.persist.get('last_cleanup'))
def shutdown(self, finish_queue=True):
"""
Application is being exited
:param bool finish_queue: Should scheduler finish the task queue
"""
# Wait for scheduler to finish
self.scheduler.shutdown(finish_queue=finish_queue)
try:
self.scheduler.wait()
except KeyboardInterrupt:
log.debug('Not waiting for scheduler shutdown due to ctrl-c')
# show real stack trace in debug mode
if manager.options.debug:
raise
print('**** Keyboard Interrupt ****')
fire_event('manager.shutdown', self)
if not self.unit_test: # don't scroll "nosetests" summary results when logging is enabled
log.debug('Shutting down')
self.engine.dispose()
# remove temporary database used in test mode
if self.options.test:
if not 'test' in self.db_filename:
raise Exception('trying to delete non test database?')
if self._has_lock:
os.remove(self.db_filename)
log.info('Removed test database')
if not self.unit_test: # don't scroll "nosetests" summary results when logging is enabled
log.debug('Shutdown completed')
class Manager(object):
"""Manager class for FlexGet
Fires events:
* manager.initialize
The first time the manager is initialized, before config is loaded
* manager.before_config_load
Before the config file is loaded from disk
* manager.before_config_validate
When updating the config, before the validator is run on it
* manager.config_updated
After a configuration file has been loaded or changed (and validated) this event is fired
* manager.startup
After manager has been initialized. This is when application becomes ready to use, however no database lock is
present, so the database must not be modified on this event.
* manager.lock_acquired
The manager does not always require a lock on startup, if one is requested, this event will run when it has been
acquired successfully
* manager.upgrade
If any plugins have declared a newer schema version than exists in the database, this event will be fired to
allow plugins to upgrade their tables
* manager.shutdown
When the manager is exiting
* manager.execute.completed
If execution in current process was completed
* manager.daemon.started
* manager.daemon.completed
* manager.db_cleanup
"""
unit_test = False
options = None
def __init__(self, options):
"""
:param options: argparse parsed options object
"""
global manager
assert not manager, 'Only one instance of Manager should be created at a time!'
self.options = options
self.config_base = None
self.config_name = None
self.config_path = None
self.db_filename = None
self.engine = None
self.lockfile = None
self.database_uri = None
self.db_upgraded = False
self._has_lock = False
self.is_daemon = False
self.config = {}
self.ipc_server = IPCServer(self, options.ipc_port)
self.task_queue = TaskQueue()
manager = self
self.initialize()
# cannot be imported at module level because of circular references
from flexget.utils.simple_persistence import SimplePersistence
self.persist = SimplePersistence('manager')
log.debug('sys.defaultencoding: %s' % sys.getdefaultencoding())
log.debug('sys.getfilesystemencoding: %s' %
sys.getfilesystemencoding())
log.debug('os.path.supports_unicode_filenames: %s' %
os.path.supports_unicode_filenames)
if db_schema.upgrade_required():
log.info('Database upgrade is required. Attempting now.')
# Make sure not to fire the lock-acquired event yet
# TODO: Detect if any database upgrading is needed and acquire the lock only in one place
with self.acquire_lock(event=False):
fire_event('manager.upgrade', self)
if manager.db_upgraded:
fire_event('manager.db_upgraded', self)
fire_event('manager.startup', self)
def __del__(self):
global manager
manager = None
def initialize(self):
"""Separated from __init__ so that unit tests can modify options before loading config."""
self.setup_yaml()
self.find_config(create=(self.options.cli_command == 'webui'))
self.init_sqlalchemy()
fire_event('manager.initialize', self)
try:
self.load_config()
except ValueError as e:
log.critical('Failed to load config file: %s' % e.args[0])
self.shutdown(finish_queue=False)
sys.exit(1)
@property
def tasks(self):
"""A list of tasks in the config"""
if not self.config:
return []
return self.config.get('tasks', {}).keys()
@property
def has_lock(self):
return self._has_lock
def execute(self, options=None, output=None, priority=1):
"""
Run all (can be limited with options) tasks from the config.
:param options: Either an :class:`argparse.Namespace` instance, or a dict, containing options for execution
:param output: If a file-like object is specified here, log messages and stdout from the execution will be
written to it.
:param priority: If there are other executions waiting to be run, they will be run in priority order,
lowest first.
:returns: a list of :class:`threading.Event` instances which will be
set when each respective task has finished running
"""
if options is None:
options = copy.copy(self.options.execute)
elif isinstance(options, dict):
options_namespace = copy.copy(self.options.execute)
options_namespace.__dict__.update(options)
options = options_namespace
task_names = self.tasks
# Handle --tasks
if options.tasks:
# Create list of tasks to run, preserving order
task_names = []
for arg in options.tasks:
matches = [
t for t in self.tasks
if fnmatch.fnmatchcase(unicode(t).lower(), arg.lower())
]
if not matches:
msg = '`%s` does not match any tasks' % arg
log.error(msg)
if output:
output.write(msg)
continue
task_names.extend(m for m in matches if m not in task_names)
# Set the option as a list of matching task names so plugins can use it easily
options.tasks = task_names
# TODO: 1.2 This is a hack to make task priorities work still, not sure if it's the best one
task_names = sorted(
task_names,
key=lambda t: self.config['tasks'][t].get('priority', 65535))
finished_events = []
for task_name in task_names:
task = Task(self,
task_name,
options=options,
output=output,
priority=priority)
self.task_queue.put(task)
finished_events.append(task.finished_event)
return finished_events
def start(self):
"""
Starting point when executing from commandline, dispatch execution
to correct destination.
* :meth:`.execute_command`
* :meth:`.daemon_command`
* :meth:`.webui_command`
* CLI plugin callback function
"""
command = self.options.cli_command
options = getattr(self.options, command)
# First check for built-in commands
if command in ['execute', 'daemon', 'webui']:
if command == 'execute':
self.execute_command(options)
elif command == 'daemon':
self.daemon_command(options)
elif command == 'webui':
self.webui_command(options)
else:
# Otherwise dispatch the command to the callback function
options.cli_command_callback(self, options)
self._shutdown()
def execute_command(self, options):
"""
Send execute command to daemon through IPC or perform execution
on current process.
Fires events:
* manager.execute.completed
:param options: argparse options
"""
# If a daemon is started, send the execution to the daemon
ipc_info = self.check_ipc_info()
if ipc_info:
try:
log.info(
'There is a daemon running for this config. Sending execution to running daemon.'
)
client = IPCClient(ipc_info['port'], ipc_info['password'])
except ValueError as e:
log.error(e)
else:
client.execute(dict(options, loglevel=self.options.loglevel))
self.shutdown()
return
# Otherwise we run the execution ourselves
with self.acquire_lock():
fire_event('manager.execute.started', self)
self.task_queue.start()
self.execute(options)
self.shutdown(finish_queue=True)
self.task_queue.wait()
fire_event('manager.execute.completed', self)
def daemon_command(self, options):
"""
Fires events:
* manager.daemon.started
* manager.daemon.completed
:param options: argparse options
"""
if options.action == 'start':
with self.acquire_lock():
if options.daemonize:
self.daemonize()
try:
signal.signal(signal.SIGTERM, self._handle_sigterm)
except ValueError as e:
# If flexget is being called from another script, e.g. windows service helper, and we are not the
# main thread, this error will occur.
log.debug('Error registering sigterm handler: %s' % e)
self.is_daemon = True
self.ipc_server.start()
fire_event('manager.daemon.started', self)
self.task_queue.start()
self.task_queue.wait()
fire_event('manager.daemon.completed', self)
elif options.action == 'status':
ipc_info = self.check_ipc_info()
if ipc_info:
log.info('Daemon running. (PID: %s)' % ipc_info['pid'])
else:
log.info('No daemon appears to be running for this config.')
elif options.action in ['stop', 'reload']:
ipc_info = self.check_ipc_info()
if ipc_info:
try:
client = IPCClient(ipc_info['port'], ipc_info['password'])
except ValueError as e:
log.error(e)
else:
if options.action == 'stop':
client.shutdown()
elif options.action == 'reload':
client.reload()
self.shutdown()
else:
log.error('There does not appear to be a daemon running.')
def webui_command(self, options):
"""
:param options: argparse options
"""
# TODO: make webui an enablable plugin in regular daemon mode
try:
pkg_resources.require('flexget[webui]')
except pkg_resources.DistributionNotFound as e:
log.error('Dependency not met. %s' % e)
log.error(
'Webui dependencies not installed. You can use `pip install flexget[webui]` to install them.'
)
self.shutdown()
return
if options.daemonize:
self.daemonize()
from flexget.ui import webui
with self.acquire_lock():
self.ipc_server.start()
self.task_queue.start()
webui.start(self)
self.task_queue.wait()
def _handle_sigterm(self, signum, frame):
log.info('Got SIGTERM. Shutting down.')
self.shutdown(finish_queue=False)
def setup_yaml(self):
"""Sets up the yaml loader to return unicode objects for strings by default"""
def construct_yaml_str(self, node):
# Override the default string handling function
# to always return unicode objects
return self.construct_scalar(node)
yaml.Loader.add_constructor(u'tag:yaml.org,2002:str',
construct_yaml_str)
yaml.SafeLoader.add_constructor(u'tag:yaml.org,2002:str',
construct_yaml_str)
# Set up the dumper to not tag every string with !!python/unicode
def unicode_representer(dumper, uni):
node = yaml.ScalarNode(tag=u'tag:yaml.org,2002:str', value=uni)
return node
yaml.add_representer(unicode, unicode_representer)
# Set up the dumper to increase the indent for lists
def increase_indent_wrapper(func):
def increase_indent(self, flow=False, indentless=False):
func(self, flow, False)
return increase_indent
yaml.Dumper.increase_indent = increase_indent_wrapper(
yaml.Dumper.increase_indent)
yaml.SafeDumper.increase_indent = increase_indent_wrapper(
yaml.SafeDumper.increase_indent)
def find_config(self, create=False):
"""
Find the configuration file.
:param bool create: If a config file is not found, and create is True, one will be created in the home folder
"""
config = None
home_path = os.path.join(os.path.expanduser('~'), '.flexget')
options_config = os.path.expanduser(self.options.config)
possible = []
if os.path.isabs(options_config):
# explicit path given, don't try anything
config = options_config
possible = [config]
else:
log.debug('Figuring out config load paths')
try:
possible.append(os.getcwdu())
except OSError:
log.debug(
'current directory invalid, not searching for config there'
)
# for virtualenv / dev sandbox
if hasattr(sys, 'real_prefix'):
log.debug('Adding virtualenv path')
possible.append(sys.prefix.decode(sys.getfilesystemencoding()))
# normal lookup locations
possible.append(home_path)
if sys.platform.startswith('win'):
# On windows look in ~/flexget as well, as explorer does not let you create a folder starting with a dot
home_path = os.path.join(os.path.expanduser('~'), 'flexget')
possible.append(home_path)
else:
# The freedesktop.org standard config location
xdg_config = os.environ.get(
'XDG_CONFIG_HOME',
os.path.join(os.path.expanduser('~'), '.config'))
possible.append(os.path.join(xdg_config, 'flexget'))
for path in possible:
config = os.path.join(path, options_config)
if os.path.exists(config):
log.debug('Found config: %s' % config)
break
else:
config = None
if not (config and os.path.exists(config)):
if not create:
log.info('Tried to read from: %s' % ', '.join(possible))
log.critical('Failed to find configuration file %s' %
options_config)
sys.exit(1)
config = os.path.join(home_path, options_config)
log.info('Config file %s not found. Creating new config %s' %
(options_config, config))
with open(config, 'w') as newconfig:
# Write empty tasks to the config
newconfig.write(yaml.dump({'tasks': {}}))
log.debug('Config file %s selected' % config)
self.config_path = config
self.config_name = os.path.splitext(os.path.basename(config))[0]
self.config_base = os.path.normpath(os.path.dirname(config))
self.lockfile = os.path.join(self.config_base,
'.%s-lock' % self.config_name)
def load_config(self):
"""
Loads the config file from disk, validates and activates it.
:raises: `ValueError` if there is a problem loading the config file
"""
fire_event('manager.before_config_load', self)
with codecs.open(self.config_path, 'rb', 'utf-8') as f:
try:
raw_config = f.read()
except UnicodeDecodeError:
log.critical('Config file must be UTF-8 encoded.')
raise ValueError('Config file is not UTF-8 encoded')
try:
config = yaml.safe_load(raw_config) or {}
except Exception as e:
msg = str(e).replace('\n', ' ')
msg = ' '.join(msg.split())
log.critical(msg)
print('')
print('-' * 79)
print(
' Malformed configuration file (check messages above). Common reasons:'
)
print('-' * 79)
print('')
print(' o Indentation error')
print(' o Missing : from end of the line')
print(' o Non ASCII characters (use UTF8)')
print(' o If text contains any of :[]{}% characters it must be single-quoted ' \
'(eg. value{1} should be \'value{1}\')\n')
# Not very good practice but we get several kind of exceptions here, I'm not even sure all of them
# At least: ReaderError, YmlScannerError (or something like that)
if hasattr(e, 'problem') and hasattr(
e, 'context_mark') and hasattr(e, 'problem_mark'):
lines = 0
if e.problem is not None:
print(' Reason: %s\n' % e.problem)
if e.problem == 'mapping values are not allowed here':
print(
' ----> MOST LIKELY REASON: Missing : from end of the line!'
)
print('')
if e.context_mark is not None:
print(' Check configuration near line %s, column %s' %
(e.context_mark.line, e.context_mark.column))
lines += 1
if e.problem_mark is not None:
print(' Check configuration near line %s, column %s' %
(e.problem_mark.line, e.problem_mark.column))
lines += 1
if lines:
print('')
if lines == 1:
print(' Fault is almost always in this or previous line\n')
if lines == 2:
print(
' Fault is almost always in one of these lines or previous ones\n'
)
# When --debug escalate to full stacktrace
if self.options.debug:
raise
raise ValueError('Config file is not valid YAML')
# config loaded successfully
log.debug('config_name: %s' % self.config_name)
log.debug('config_base: %s' % self.config_base)
# Install the newly loaded config
self.update_config(config)
def update_config(self, config):
"""
Provide a new config for the manager to use.
:raises: `ValueError` and rolls back to previous config if the provided config is not valid.
"""
old_config = self.config
self.config = config
errors = self.validate_config()
if errors:
for error in errors:
log.critical("[%s] %s", error.json_pointer, error.message)
log.debug('invalid config, rolling back')
self.config = old_config
raise ValueError('Config did not pass schema validation')
log.debug('New config data loaded.')
fire_event('manager.config_updated', self)
def save_config(self):
"""Dumps current config to yaml config file"""
# Back up the user's current config before overwriting
backup_path = os.path.join(
self.config_base, '%s-%s.bak' %
(self.config_name, datetime.now().strftime('%y%m%d%H%M%S')))
log.debug('backing up old config to %s before new save' % backup_path)
shutil.copy(self.config_path, backup_path)
with open(self.config_path, 'w') as config_file:
config_file.write(yaml.dump(self.config, default_flow_style=False))
def config_changed(self):
"""Makes sure that all tasks will have the config_modified flag come out true on the next run.
Useful when changing the db and all tasks need to be completely reprocessed."""
from flexget.task import config_changed
for task in self.tasks:
config_changed(task)
def validate_config(self):
"""
Check all root level keywords are valid.
:returns: A list of `ValidationError`s
"""
fire_event('manager.before_config_validate', self)
return config_schema.process_config(self.config)
def init_sqlalchemy(self):
"""Initialize SQLAlchemy"""
try:
if [int(part)
for part in sqlalchemy.__version__.split('.')] < [0, 7, 0]:
print(
'FATAL: SQLAlchemy 0.7.0 or newer required. Please upgrade your SQLAlchemy.',
file=sys.stderr)
sys.exit(1)
except ValueError as e:
log.critical(
'Failed to check SQLAlchemy version, you may need to upgrade it'
)
# SQLAlchemy
if self.database_uri is None:
self.db_filename = os.path.join(self.config_base,
'db-%s.sqlite' % self.config_name)
if self.options.test:
db_test_filename = os.path.join(
self.config_base, 'test-%s.sqlite' % self.config_name)
log.info('Test mode, creating a copy from database ...')
if os.path.exists(self.db_filename):
shutil.copy(self.db_filename, db_test_filename)
self.db_filename = db_test_filename
# Different database, different lock file
self.lockfile = os.path.join(
self.config_base, '.test-%s-lock' % self.config_name)
log.info('Test database created')
# in case running on windows, needs double \\
filename = self.db_filename.replace('\\', '\\\\')
self.database_uri = 'sqlite:///%s' % filename
if self.db_filename and not os.path.exists(self.db_filename):
log.verbose('Creating new database %s ...' % self.db_filename)
# fire up the engine
log.debug('Connecting to: %s' % self.database_uri)
try:
self.engine = sqlalchemy.create_engine(
self.database_uri,
echo=self.options.debug_sql,
poolclass=SingletonThreadPool,
connect_args={'check_same_thread':
False}) # assert_unicode=True
except ImportError:
print(
'FATAL: Unable to use SQLite. Are you running Python 2.5 - 2.7 ?\n'
'Python should normally have SQLite support built in.\n'
'If you\'re running correct version of Python then it is not equipped with SQLite.\n'
'You can try installing `pysqlite`. If you have compiled python yourself, '
'recompile it with SQLite support.',
file=sys.stderr)
sys.exit(1)
Session.configure(bind=self.engine)
# create all tables, doesn't do anything to existing tables
try:
def before_table_create(event, target, bind, tables=None, **kw):
if tables:
# We need to acquire a lock if we are creating new tables
# TODO: Detect if any database upgrading is needed and acquire the lock only in one place
self.acquire_lock(event=False).__enter__()
Base.metadata.append_ddl_listener('before-create',
before_table_create)
Base.metadata.create_all(bind=self.engine)
except OperationalError as e:
if os.path.exists(self.db_filename):
print('%s - make sure you have write permissions to file %s' %
(e.message, self.db_filename),
file=sys.stderr)
else:
print(
'%s - make sure you have write permissions to directory %s'
% (e.message, self.config_base),
file=sys.stderr)
raise
def _read_lock(self):
"""
Read the values from the lock file. Returns None if there is no current lock file.
"""
if self.lockfile and os.path.exists(self.lockfile):
result = {}
with open(self.lockfile) as f:
lines = [l for l in f.readlines() if l]
for line in lines:
try:
key, value = line.split(b':', 1)
except ValueError:
log.debug('Invalid line in lock file: %s' % line)
continue
result[key.strip().lower()] = value.strip()
for key in result:
if result[key].isdigit():
result[key] = int(result[key])
result.setdefault('pid', None)
if not result['pid']:
log.error(
'Invalid lock file. Make sure FlexGet is not running, then delete it.'
)
elif not pid_exists(result['pid']):
return None
return result
return None
def check_lock(self):
"""Returns True if there is a lock on the database."""
lock_info = self._read_lock()
if not lock_info:
return False
# Don't count it if we hold the lock
if os.getpid() == lock_info['pid']:
return False
return True
def check_ipc_info(self):
"""If a daemon has a lock on the database, return info to connect to IPC."""
lock_info = self._read_lock()
if lock_info and 'port' in lock_info:
return lock_info
return None
@contextmanager
def acquire_lock(self, event=True):
"""
:param bool event: If True, the 'manager.lock_acquired' event will be fired after a lock is obtained
"""
acquired = False
try:
# Don't do anything if we already have a lock. This means only the outermost call will release the lock file
if not self._has_lock:
# Exit if there is an existing lock.
if self.check_lock():
with open(self.lockfile) as f:
pid = f.read()
print('Another process (%s) is running, will exit.' %
pid.split('\n')[0],
file=sys.stderr)
print(
'If you\'re sure there is no other instance running, delete %s'
% self.lockfile,
file=sys.stderr)
sys.exit(1)
self._has_lock = True
self.write_lock()
acquired = True
if event:
fire_event('manager.lock_acquired', self)
yield
finally:
if acquired:
self.release_lock()
self._has_lock = False
def write_lock(self, ipc_info=None):
assert self._has_lock
with open(self.lockfile, 'w') as f:
f.write(b'PID: %s\n' % os.getpid())
if ipc_info:
for key in sorted(ipc_info):
f.write(b'%s: %s\n' % (key, ipc_info[key]))
def release_lock(self):
if os.path.exists(self.lockfile):
os.remove(self.lockfile)
log.debug('Removed %s' % self.lockfile)
else:
log.debug('Lockfile %s not found' % self.lockfile)
def daemonize(self):
"""Daemonizes the current process. Returns the new pid"""
if sys.platform.startswith('win'):
log.error('Cannot daemonize on windows')
return
if threading.activeCount() != 1:
log.critical('There are %r active threads. '
'Daemonizing now may cause strange failures.' %
threading.enumerate())
log.info('Daemonizing...')
try:
pid = os.fork()
if pid > 0:
# Don't run the exit handlers on the parent
atexit._exithandlers = []
# exit first parent
sys.exit(0)
except OSError as e:
sys.stderr.write('fork #1 failed: %d (%s)\n' %
(e.errno, e.strerror))
sys.exit(1)
# decouple from parent environment
os.chdir('/')
os.setsid()
os.umask(0)
# do second fork
try:
pid = os.fork()
if pid > 0:
# Don't run the exit handlers on the parent
atexit._exithandlers = []
# exit from second parent
sys.exit(0)
except OSError as e:
sys.stderr.write('fork #2 failed: %d (%s)\n' %
(e.errno, e.strerror))
sys.exit(1)
log.info('Daemonize complete. New PID: %s' % os.getpid())
# redirect standard file descriptors
sys.stdout.flush()
sys.stderr.flush()
si = file('/dev/null', 'r')
so = file('/dev/null', 'a+')
se = file('/dev/null', 'a+', 0)
os.dup2(si.fileno(), sys.stdin.fileno())
os.dup2(so.fileno(), sys.stdout.fileno())
os.dup2(se.fileno(), sys.stderr.fileno())
# If we have a lock, update the lock file with our new pid
if self._has_lock:
self.write_lock()
def db_cleanup(self, force=False):
"""
Perform database cleanup if cleanup interval has been met.
Fires events:
* manager.db_cleanup
If interval was met. Gives session to do the cleanup as a parameter.
:param bool force: Run the cleanup no matter whether the interval has been met.
"""
expired = self.persist.get('last_cleanup', datetime(
1900, 1, 1)) < datetime.now() - DB_CLEANUP_INTERVAL
if force or expired:
log.info('Running database cleanup.')
session = Session()
try:
fire_event('manager.db_cleanup', session)
session.commit()
finally:
session.close()
# Just in case some plugin was overzealous in its cleaning, mark the config changed
self.config_changed()
self.persist['last_cleanup'] = datetime.now()
else:
log.debug('Not running db cleanup, last run %s' %
self.persist.get('last_cleanup'))
def shutdown(self, finish_queue=True):
"""
Request manager shutdown.
:param bool finish_queue: Should scheduler finish the task queue
"""
self.task_queue.shutdown(finish_queue)
def _shutdown(self):
"""Runs when the manager is done processing everything."""
fire_event('manager.shutdown', self)
if not self.unit_test: # don't scroll "nosetests" summary results when logging is enabled
log.debug('Shutting down')
self.engine.dispose()
# remove temporary database used in test mode
if self.options.test:
if not 'test' in self.db_filename:
raise Exception('trying to delete non test database?')
if self._has_lock:
os.remove(self.db_filename)
log.info('Removed test database')
if not self.unit_test: # don't scroll "nosetests" summary results when logging is enabled
log.debug('Shutdown completed')
class Manager(object):
"""Manager class for FlexGet
Fires events:
* manager.startup
After manager has been initialized. This is when application becomes ready to use, however no database lock is
present, so the database must not be modified on this event.
* manager.lock-acquired
The manager does not always require a lock on startup, if one is requested, this event will run when it has been
acquired successfully
* manager.config-loaded
When a valid configuration has been (re)loaded, this event is fired
* manager.upgrade
If any plugins have declared a newer schema version than exists in the database, this event will be fired to
allow plugins to upgrade their tables
* manager.shutdown
When the manager is exiting
* manager.execute.completed
If execution in current process was completed
* manager.daemon.started
* manager.daemon.completed
* manager.db_cleanup
"""
unit_test = False
options = None
def __init__(self, options):
"""
:param options: argparse parsed options object
"""
global manager
assert not manager, 'Only one instance of Manager should be created at a time!'
self.options = options
self.config_base = None
self.config_name = None
self.config_path = None
self.db_filename = None
self.engine = None
self.lockfile = None
self.database_uri = None
self.db_upgraded = False
self._has_lock = False
self.config = {}
self.scheduler = Scheduler(self)
self.ipc_server = IPCServer(self, options.ipc_port)
manager = self
self.initialize()
# cannot be imported at module level because of circular references
from flexget.utils.simple_persistence import SimplePersistence
self.persist = SimplePersistence('manager')
log.debug('sys.defaultencoding: %s' % sys.getdefaultencoding())
log.debug('sys.getfilesystemencoding: %s' %
sys.getfilesystemencoding())
log.debug('os.path.supports_unicode_filenames: %s' %
os.path.supports_unicode_filenames)
if db_schema.upgrade_required():
log.info('Database upgrade is required. Attempting now.')
# Make sure not to fire the lock-acquired event yet
# TODO: Detect if any database upgrading is needed and acquire the lock only in one place
with self.acquire_lock(event=False):
fire_event('manager.upgrade', self)
if manager.db_upgraded:
fire_event('manager.db_upgraded', self)
fire_event('manager.startup', self)
def __del__(self):
global manager
manager = None
def initialize(self):
"""Separated from __init__ so that unit tests can modify options before loading config."""
self.setup_yaml()
self.find_config(create=(self.options.cli_command == 'webui'))
self.init_sqlalchemy()
fire_event('manager.before_config_load', self)
self.load_config()
fire_event('manager.before_config_validate', self)
errors = self.validate_config()
if errors:
for error in errors:
log.critical("[%s] %s", error.json_pointer, error.message)
self.shutdown(finish_queue=False)
sys.exit(1)
fire_event('manager.config-loaded', self)
@property
def tasks(self):
"""A list of tasks in the config"""
if not self.config:
return []
return self.config.get('tasks', {}).keys()
@property
def has_lock(self):
return self._has_lock
def run_cli_command(self):
"""
Starting point when executing from commandline, dispatch execution
to correct destination.
* :meth:`.execute_command`
* :meth:`.daemon_command`
* :meth:`.webui_command`
* CLI plugin callback function
"""
command = self.options.cli_command
options = getattr(self.options, command)
# First check for built-in commands
if command == 'execute':
self.execute_command(options)
elif command == 'daemon':
self.daemon_command(options)
elif command == 'webui':
self.webui_command(options)
else:
# Otherwise dispatch the command to the callback function
options.cli_command_callback(self, options)
def execute_command(self, options):
"""
Send execute command to daemon through IPC or perform execution
on current process.
Fires events:
* manager.execute.completed
:param options: argparse options
"""
# If a daemon is started, send the execution to the daemon
ipc_info = self.check_ipc_info()
if ipc_info:
client = IPCClient(ipc_info['port'], ipc_info['password'])
client.execute(dict(options))
self.shutdown()
return
# Otherwise we run the execution ourselves
with self.acquire_lock():
fire_event('manager.execute.started', self)
self.scheduler.start(run_schedules=False)
self.scheduler.execute(options)
self.scheduler.shutdown(finish_queue=True)
try:
self.scheduler.wait()
except KeyboardInterrupt:
log.error(
'Got ctrl-c exiting after this task completes. Press ctrl-c again to abort this task.'
)
else:
fire_event('manager.execute.completed', self)
self.shutdown(finish_queue=False)
def daemon_command(self, options):
"""
Fires events:
* manager.daemon.started
* manager.daemon.completed
:param options: argparse options
"""
if options.action == 'start':
if options.daemonize:
self.daemonize()
with self.acquire_lock():
signal.signal(signal.SIGTERM, self._handle_sigterm)
self.ipc_server.start()
fire_event('manager.daemon.started', self)
self.scheduler.start()
try:
self.scheduler.wait()
except KeyboardInterrupt:
log.info('Got ctrl-c, shutting down.')
fire_event('manager.daemon.completed', self)
self.shutdown(finish_queue=False)
elif options.action == 'stop':
ipc_info = self.check_ipc_info()
if ipc_info:
client = IPCClient(ipc_info['port'], ipc_info['password'])
client.shutdown()
self.shutdown()
else:
log.error('There does not appear to be a daemon running.')
elif options.action == 'status':
ipc_info = self.check_ipc_info()
if ipc_info:
log.info('Daemon running. (PID: %s)' % ipc_info['pid'])
else:
log.info('No daemon appears to be running for this config.')
def webui_command(self, options):
"""
:param options: argparse options
"""
try:
pkg_resources.require('flexget[webui]')
except pkg_resources.DistributionNotFound as e:
log.error('Dependency not met. %s' % e)
log.error(
'Webui dependencies not installed. You can use `pip install flexget[webui]` to install them.'
)
self.shutdown()
return
if options.daemonize:
self.daemonize()
from flexget.ui import webui
with self.acquire_lock():
webui.start(self)
def _handle_sigterm(self, signum, frame):
log.info('Got SIGTERM. Shutting down.')
self.shutdown(finish_queue=False)
def setup_yaml(self):
"""Sets up the yaml loader to return unicode objects for strings by default"""
def construct_yaml_str(self, node):
# Override the default string handling function
# to always return unicode objects
return self.construct_scalar(node)
yaml.Loader.add_constructor(u'tag:yaml.org,2002:str',
construct_yaml_str)
yaml.SafeLoader.add_constructor(u'tag:yaml.org,2002:str',
construct_yaml_str)
# Set up the dumper to not tag every string with !!python/unicode
def unicode_representer(dumper, uni):
node = yaml.ScalarNode(tag=u'tag:yaml.org,2002:str', value=uni)
return node
yaml.add_representer(unicode, unicode_representer)
# Set up the dumper to increase the indent for lists
def increase_indent_wrapper(func):
def increase_indent(self, flow=False, indentless=False):
func(self, flow, False)
return increase_indent
yaml.Dumper.increase_indent = increase_indent_wrapper(
yaml.Dumper.increase_indent)
yaml.SafeDumper.increase_indent = increase_indent_wrapper(
yaml.SafeDumper.increase_indent)
def find_config(self, create=False):
"""
Find the configuration file.
:param bool create: If a config file is not found, and create is True, one will be created in the home folder
"""
startup_path = os.path.dirname(os.path.abspath(sys.path[0]))
home_path = os.path.join(os.path.expanduser('~'), '.flexget')
current_path = os.getcwd()
exec_path = sys.path[0]
config_path = os.path.dirname(self.options.config)
possible = []
if config_path != '':
# explicit path given, don't try anything too fancy
possible.append(self.options.config)
else:
log.debug('Figuring out config load paths')
# for virtualenv / dev sandbox
from flexget import __version__ as version
if version == '{git}':
log.debug('Running git, adding virtualenv / sandbox paths')
possible.append(os.path.join(exec_path, '..'))
possible.append(current_path)
possible.append(exec_path)
# normal lookup locations
possible.append(startup_path)
possible.append(home_path)
if sys.platform.startswith('win'):
# On windows look in ~/flexget as well, as explorer does not let you create a folder starting with a dot
home_path = os.path.join(os.path.expanduser('~'), 'flexget')
possible.append(home_path)
else:
# The freedesktop.org standard config location
xdg_config = os.environ.get(
'XDG_CONFIG_HOME',
os.path.join(os.path.expanduser('~'), '.config'))
possible.append(os.path.join(xdg_config, 'flexget'))
for path in possible:
config = os.path.join(path, self.options.config)
if os.path.exists(config):
log.debug('Found config: %s' % config)
break
else:
if not create:
log.info('Tried to read from: %s' % ', '.join(possible))
log.critical('Failed to find configuration file %s' %
self.options.config)
sys.exit(1)
config = os.path.join(home_path, self.options.config)
log.info('Config file %s not found. Creating new config %s' %
(self.options.config, config))
with open(config, 'w') as newconfig:
# Write empty tasks to the config
newconfig.write(yaml.dump({'tasks': {}}))
self.config_path = config
self.config_name = os.path.splitext(os.path.basename(config))[0]
self.config_base = os.path.normpath(os.path.dirname(config))
self.lockfile = os.path.join(self.config_base,
'.%s-lock' % self.config_name)
def load_config(self):
"""
.. warning::
Calls sys.exit(1) if configuration file could not be loaded.
This is something we probably want to change.
"""
with open(self.config_path, 'rb') as f:
config = f.read()
try:
config = config.decode('utf-8')
except UnicodeDecodeError:
log.critical('Config file must be UTF-8 encoded.')
sys.exit(1)
try:
self.config = yaml.safe_load(config) or {}
except Exception as e:
msg = str(e).replace('\n', ' ')
msg = ' '.join(msg.split())
log.critical(msg)
print('')
print('-' * 79)
print(
' Malformed configuration file (check messages above). Common reasons:'
)
print('-' * 79)
print('')
print(' o Indentation error')
print(' o Missing : from end of the line')
print(' o Non ASCII characters (use UTF8)')
print(' o If text contains any of :[]{}% characters it must be single-quoted ' \
'(eg. value{1} should be \'value{1}\')\n')
# Not very good practice but we get several kind of exceptions here, I'm not even sure all of them
# At least: ReaderError, YmlScannerError (or something like that)
if hasattr(e, 'problem') and hasattr(
e, 'context_mark') and hasattr(e, 'problem_mark'):
lines = 0
if e.problem is not None:
print(' Reason: %s\n' % e.problem)
if e.problem == 'mapping values are not allowed here':
print(
' ----> MOST LIKELY REASON: Missing : from end of the line!'
)
print('')
if e.context_mark is not None:
print(' Check configuration near line %s, column %s' %
(e.context_mark.line, e.context_mark.column))
lines += 1
if e.problem_mark is not None:
print(' Check configuration near line %s, column %s' %
(e.problem_mark.line, e.problem_mark.column))
lines += 1
if lines:
print('')
if lines == 1:
print(' Fault is almost always in this or previous line\n')
if lines == 2:
print(
' Fault is almost always in one of these lines or previous ones\n'
)
# When --debug escalate to full stacktrace
if self.options.debug:
raise
sys.exit(1)
# config loaded successfully
log.debug('config_name: %s' % self.config_name)
log.debug('config_base: %s' % self.config_base)
def save_config(self):
"""Dumps current config to yaml config file"""
config_file = file(
os.path.join(self.config_base, self.config_name) + '.yml', 'w')
try:
config_file.write(yaml.dump(self.config, default_flow_style=False))
finally:
config_file.close()
def config_changed(self):
"""Makes sure that all tasks will have the config_modified flag come out true on the next run.
Useful when changing the db and all tasks need to be completely reprocessed."""
from flexget.task import config_changed
for task in self.tasks:
config_changed(task)
def pre_check_config(self, config):
"""Checks configuration file for common mistakes that are easily detectable"""
def get_indentation(line):
i, n = 0, len(line)
while i < n and line[i] == ' ':
i += 1
return i
def isodd(n):
return bool(n % 2)
line_num = 0
duplicates = {}
# flags
prev_indentation = 0
prev_mapping = False
prev_list = True
prev_scalar = True
list_open = False # multiline list with [
for line in config.splitlines():
if '# warnings off' in line.strip().lower():
log.debug('config pre-check warnings off')
break
line_num += 1
# remove linefeed
line = line.rstrip()
# empty line
if line.strip() == '':
continue
# comment line
if line.strip().startswith('#'):
continue
indentation = get_indentation(line)
if prev_scalar:
if indentation <= prev_indentation:
prev_scalar = False
else:
continue
cur_list = line.strip().startswith('-')
# skipping lines as long as multiline compact list is open
if list_open:
if line.strip().endswith(']'):
list_open = False
# print 'closed list at line %s' % line
continue
else:
list_open = line.strip().endswith(
': [') or line.strip().endswith(':[')
if list_open:
# print 'list open at line %s' % line
continue
# print '#%i: %s' % (line_num, line)
# print 'indentation: %s, prev_ind: %s, prev_mapping: %s, prev_list: %s, cur_list: %s' % \
# (indentation, prev_indentation, prev_mapping, prev_list, cur_list)
if ':\t' in line:
log.critical('Line %s has TAB character after : character. '
'DO NOT use tab key when editing config!' %
line_num)
elif '\t' in line:
log.warning('Line %s has tabs, use only spaces!' % line_num)
if isodd(indentation):
log.warning('Config line %s has odd (uneven) indentation' %
line_num)
if indentation > prev_indentation and not prev_mapping:
# line increases indentation, but previous didn't start mapping
log.warning(
'Config line %s is likely missing \':\' at the end' %
(line_num - 1))
if indentation > prev_indentation + 2 and prev_mapping and not prev_list:
# mapping value after non list indented more than 2
log.warning('Config line %s is indented too much' % line_num)
if indentation <= prev_indentation + (
2 * (not cur_list)) and prev_mapping and prev_list:
log.warning('Config line %s is not indented enough' % line_num)
if prev_mapping and cur_list:
# list after opening mapping
if indentation < prev_indentation or indentation > prev_indentation + 2 + (
2 * prev_list):
log.warning(
'Config line %s containing list element is indented incorrectly'
% line_num)
elif prev_mapping and indentation <= prev_indentation:
# after opening a map, indentation doesn't increase
log.warning(
'Config line %s is indented incorrectly (previous line ends with \':\')'
% line_num)
# notify if user is trying to set same key multiple times in a task (a common mistake)
for level in duplicates.iterkeys():
# when indentation goes down, delete everything indented more than that
if indentation < level:
duplicates[level] = {}
if ':' in line:
name = line.split(':', 1)[0].strip()
ns = duplicates.setdefault(indentation, {})
if name in ns:
log.warning(
'Trying to set value for `%s` in line %s, but it is already defined in line %s!'
% (name, line_num, ns[name]))
ns[name] = line_num
prev_indentation = indentation
# this line is a mapping (ends with :)
prev_mapping = line[-1] == ':'
prev_scalar = line[-1] in '|>'
# this line is a list
prev_list = line.strip()[0] == '-'
if prev_list:
# This line is in a list, so clear the duplicates,
# as duplicates are not always wrong in a list. see #697
duplicates[indentation] = {}
log.debug('Pre-checked %s configuration lines' % line_num)
def validate_config(self):
"""
Check all root level keywords are valid.
:returns: A list of `ValidationError`s
"""
return config_schema.process_config(self.config)
def init_sqlalchemy(self):
"""Initialize SQLAlchemy"""
try:
if [int(part)
for part in sqlalchemy.__version__.split('.')] < [0, 7, 0]:
print(
'FATAL: SQLAlchemy 0.7.0 or newer required. Please upgrade your SQLAlchemy.',
file=sys.stderr)
sys.exit(1)
except ValueError as e:
log.critical(
'Failed to check SQLAlchemy version, you may need to upgrade it'
)
# SQLAlchemy
if self.database_uri is None:
self.db_filename = os.path.join(self.config_base,
'db-%s.sqlite' % self.config_name)
if self.options.test:
db_test_filename = os.path.join(
self.config_base, 'test-%s.sqlite' % self.config_name)
log.info('Test mode, creating a copy from database ...')
if os.path.exists(self.db_filename):
shutil.copy(self.db_filename, db_test_filename)
self.db_filename = db_test_filename
log.info('Test database created')
# in case running on windows, needs double \\
filename = self.db_filename.replace('\\', '\\\\')
self.database_uri = 'sqlite:///%s' % filename
if self.db_filename and not os.path.exists(self.db_filename):
log.verbose('Creating new database %s ...' % self.db_filename)
# fire up the engine
log.debug('Connecting to: %s' % self.database_uri)
try:
self.engine = sqlalchemy.create_engine(
self.database_uri,
echo=self.options.debug_sql,
poolclass=SingletonThreadPool,
connect_args={'check_same_thread':
False}) # assert_unicode=True
except ImportError:
print(
'FATAL: Unable to use SQLite. Are you running Python 2.5 - 2.7 ?\n'
'Python should normally have SQLite support built in.\n'
'If you\'re running correct version of Python then it is not equipped with SQLite.\n'
'You can try installing `pysqlite`. If you have compiled python yourself, '
'recompile it with SQLite support.',
file=sys.stderr)
sys.exit(1)
Session.configure(bind=self.engine)
# create all tables, doesn't do anything to existing tables
try:
def before_table_create(event, target, bind, tables=None, **kw):
if tables:
# We need to acquire a lock if we are creating new tables
# TODO: Detect if any database upgrading is needed and acquire the lock only in one place
self.acquire_lock(event=False).__enter__()
Base.metadata.append_ddl_listener('before-create',
before_table_create)
Base.metadata.create_all(bind=self.engine)
except OperationalError as e:
if os.path.exists(self.db_filename):
print('%s - make sure you have write permissions to file %s' %
(e.message, self.db_filename),
file=sys.stderr)
else:
print(
'%s - make sure you have write permissions to directory %s'
% (e.message, self.config_base),
file=sys.stderr)
raise Exception(e.message)
def _read_lock(self):
"""
Read the values from the lock file. Returns None if there is no current lock file.
"""
if self.lockfile and os.path.exists(self.lockfile):
result = {}
with open(self.lockfile) as f:
lines = [l for l in f.readlines() if l]
for line in lines:
key, value = line.split(b':', 1)
result[key.strip().lower()] = value.strip()
for key in result:
if result[key].isdigit():
result[key] = int(result[key])
if not pid_exists(result['pid']):
return None
return result
return None
def check_lock(self):
"""Returns True if there is a lock on the database."""
lock_info = self._read_lock()
if not lock_info:
return False
# Don't count it if we hold the lock
if os.getpid() == lock_info['pid']:
return False
return True
def check_ipc_info(self):
"""If a daemon has a lock on the database, return info to connect to IPC."""
lock_info = self._read_lock()
if lock_info and 'port' in lock_info:
return lock_info
return None
@contextmanager
def acquire_lock(self, event=True):
"""
:param bool event: If True, the 'manager.lock-acquired' event will be fired after a lock is obtained
"""
acquired = False
try:
# Don't do anything if we already have a lock. This means only the outermost call will release the lock file
if not self._has_lock:
# Exit if there is an existing lock.
if self.check_lock():
with open(self.lockfile) as f:
pid = f.read()
print('Another process (%s) is running, will exit.' %
pid.split('\n')[0],
file=sys.stderr)
print(
'If you\'re sure there is no other instance running, delete %s'
% self.lockfile,
file=sys.stderr)
sys.exit(1)
self._has_lock = True
self.write_lock()
acquired = True
if event:
fire_event('manager.lock-acquired', self)
yield
finally:
if acquired:
self.release_lock()
self._has_lock = False
def write_lock(self, ipc_info=None):
assert self._has_lock
with open(self.lockfile, 'w') as f:
f.write(b'PID: %s\n' % os.getpid())
if ipc_info:
for key in sorted(ipc_info):
f.write(b'%s: %s\n' % (key, ipc_info[key]))
def release_lock(self):
if os.path.exists(self.lockfile):
os.remove(self.lockfile)
log.debug('Removed %s' % self.lockfile)
else:
log.debug('Lockfile %s not found' % self.lockfile)
def daemonize(self):
"""Daemonizes the current process. Returns the new pid"""
if sys.platform.startswith('win'):
log.error('Cannot daemonize on windows')
return
if threading.activeCount() != 1:
log.critical('There are %r active threads. '
'Daemonizing now may cause strange failures.' %
threading.enumerate())
log.info('Daemonizing...')
try:
pid = os.fork()
if pid > 0:
# Don't run the exit handlers on the parent
atexit._exithandlers = []
# exit first parent
sys.exit(0)
except OSError as e:
sys.stderr.write('fork #1 failed: %d (%s)\n' %
(e.errno, e.strerror))
sys.exit(1)
# decouple from parent environment
os.chdir('/')
os.setsid()
os.umask(0)
# do second fork
try:
pid = os.fork()
if pid > 0:
# Don't run the exit handlers on the parent
atexit._exithandlers = []
# exit from second parent
sys.exit(0)
except OSError as e:
sys.stderr.write('fork #2 failed: %d (%s)\n' %
(e.errno, e.strerror))
sys.exit(1)
log.info('Daemonize complete. New PID: %s' % os.getpid())
# redirect standard file descriptors
sys.stdout.flush()
sys.stderr.flush()
si = file('/dev/null', 'r')
so = file('/dev/null', 'a+')
se = file('/dev/null', 'a+', 0)
os.dup2(si.fileno(), sys.stdin.fileno())
os.dup2(so.fileno(), sys.stdout.fileno())
os.dup2(se.fileno(), sys.stderr.fileno())
def db_cleanup(self, force=False):
"""
Perform database cleanup if cleanup interval has been met.
Fires events:
* manager.db_cleanup
If interval was met. Gives session to do the cleanup as a parameter.
:param bool force: Run the cleanup no matter whether the interval has been met.
"""
expired = self.persist.get('last_cleanup', datetime(
1900, 1, 1)) < datetime.now() - DB_CLEANUP_INTERVAL
if force or expired:
log.info('Running database cleanup.')
session = Session()
try:
fire_event('manager.db_cleanup', session)
session.commit()
finally:
session.close()
# Just in case some plugin was overzealous in its cleaning, mark the config changed
self.config_changed()
self.persist['last_cleanup'] = datetime.now()
else:
log.debug('Not running db cleanup, last run %s' %
self.persist.get('last_cleanup'))
def shutdown(self, finish_queue=True):
"""
Application is being exited
:param bool finish_queue: Should scheduler finish the task queue
"""
# Wait for scheduler to finish
self.scheduler.shutdown(finish_queue=finish_queue)
try:
self.scheduler.wait()
except KeyboardInterrupt:
log.debug('Not waiting for scheduler shutdown due to ctrl-c')
# show real stack trace in debug mode
if manager.options.debug:
raise
print('**** Keyboard Interrupt ****')
fire_event('manager.shutdown', self)
if not self.unit_test: # don't scroll "nosetests" summary results when logging is enabled
log.debug('Shutting down')
self.engine.dispose()
# remove temporary database used in test mode
if self.options.test:
if not 'test' in self.db_filename:
raise Exception('trying to delete non test database?')
if self._has_lock:
os.remove(self.db_filename)
log.info('Removed test database')
if not self.unit_test: # don't scroll "nosetests" summary results when logging is enabled
log.debug('Shutdown completed')
class Manager(object):
"""Manager class for FlexGet
Fires events:
* manager.initialize
The first time the manager is initialized, before config is loaded
* manager.before_config_load
Before the config file is loaded from disk
* manager.before_config_validate
When updating the config, before the validator is run on it
* manager.config_updated
After a configuration file has been loaded or changed (and validated) this event is fired
* manager.startup
After manager has been initialized. This is when application becomes ready to use, however no database lock is
present, so the database must not be modified on this event.
* manager.lock_acquired
The manager does not always require a lock on startup, if one is requested, this event will run when it has been
acquired successfully
* manager.upgrade
If any plugins have declared a newer schema version than exists in the database, this event will be fired to
allow plugins to upgrade their tables
* manager.shutdown
When the manager is exiting
* manager.execute.completed
If execution in current process was completed
* manager.daemon.started
* manager.daemon.completed
* manager.db_cleanup
"""
unit_test = False
options = None
def __init__(self, options):
"""
:param options: argparse parsed options object
"""
global manager
assert not manager, 'Only one instance of Manager should be created at a time!'
self.options = options
self.config_base = None
self.config_name = None
self.config_path = None
self.db_filename = None
self.engine = None
self.lockfile = None
self.database_uri = None
self.db_upgraded = False
self._has_lock = False
self.is_daemon = False
self.config = {}
self.ipc_server = IPCServer(self, options.ipc_port)
self.task_queue = TaskQueue()
manager = self
self.initialize()
# cannot be imported at module level because of circular references
from flexget.utils.simple_persistence import SimplePersistence
self.persist = SimplePersistence('manager')
log.debug('sys.defaultencoding: %s' % sys.getdefaultencoding())
log.debug('sys.getfilesystemencoding: %s' % sys.getfilesystemencoding())
log.debug('os.path.supports_unicode_filenames: %s' % os.path.supports_unicode_filenames)
if db_schema.upgrade_required():
log.info('Database upgrade is required. Attempting now.')
# Make sure not to fire the lock-acquired event yet
# TODO: Detect if any database upgrading is needed and acquire the lock only in one place
with self.acquire_lock(event=False):
fire_event('manager.upgrade', self)
if manager.db_upgraded:
fire_event('manager.db_upgraded', self)
fire_event('manager.startup', self)
def __del__(self):
global manager
manager = None
def initialize(self):
"""Separated from __init__ so that unit tests can modify options before loading config."""
self.setup_yaml()
self.find_config(create=(self.options.cli_command == 'webui'))
self.init_sqlalchemy()
fire_event('manager.initialize', self)
try:
self.load_config()
except ValueError as e:
log.critical('Failed to load config file: %s' % e.args[0])
self.shutdown(finish_queue=False)
sys.exit(1)
@property
def tasks(self):
"""A list of tasks in the config"""
if not self.config:
return []
return self.config.get('tasks', {}).keys()
@property
def has_lock(self):
return self._has_lock
def execute(self, options=None, output=None, priority=1):
"""
Run all (can be limited with options) tasks from the config.
:param options: Either an :class:`argparse.Namespace` instance, or a dict, containing options for execution
:param output: If a file-like object is specified here, log messages and stdout from the execution will be
written to it.
:param priority: If there are other executions waiting to be run, they will be run in priority order,
lowest first.
:returns: a list of :class:`threading.Event` instances which will be
set when each respective task has finished running
"""
if options is None:
options = copy.copy(self.options.execute)
elif isinstance(options, dict):
options_namespace = copy.copy(self.options.execute)
options_namespace.__dict__.update(options)
options = options_namespace
task_names = self.tasks
# Handle --tasks
if options.tasks:
# Create list of tasks to run, preserving order
task_names = []
for arg in options.tasks:
matches = [t for t in self.tasks if fnmatch.fnmatchcase(unicode(t).lower(), arg.lower())]
if not matches:
msg = '`%s` does not match any tasks' % arg
log.error(msg)
if output:
output.write(msg)
continue
task_names.extend(m for m in matches if m not in task_names)
# Set the option as a list of matching task names so plugins can use it easily
options.tasks = task_names
# TODO: 1.2 This is a hack to make task priorities work still, not sure if it's the best one
task_names = sorted(task_names, key=lambda t: self.config['tasks'][t].get('priority', 65535))
finished_events = []
for task_name in task_names:
task = Task(self, task_name, options=options, output=output, priority=priority)
self.task_queue.put(task)
finished_events.append(task.finished_event)
return finished_events
def start(self):
"""
Starting point when executing from commandline, dispatch execution
to correct destination.
* :meth:`.execute_command`
* :meth:`.daemon_command`
* :meth:`.webui_command`
* CLI plugin callback function
"""
command = self.options.cli_command
options = getattr(self.options, command)
# First check for built-in commands
if command in ['execute', 'daemon', 'webui']:
if command == 'execute':
self.execute_command(options)
elif command == 'daemon':
self.daemon_command(options)
elif command == 'webui':
self.webui_command(options)
else:
# Otherwise dispatch the command to the callback function
options.cli_command_callback(self, options)
self._shutdown()
def execute_command(self, options):
"""
Send execute command to daemon through IPC or perform execution
on current process.
Fires events:
* manager.execute.completed
:param options: argparse options
"""
# If a daemon is started, send the execution to the daemon
ipc_info = self.check_ipc_info()
if ipc_info:
try:
log.info('There is a daemon running for this config. Sending execution to running daemon.')
client = IPCClient(ipc_info['port'], ipc_info['password'])
except ValueError as e:
log.error(e)
else:
client.execute(dict(options, loglevel=self.options.loglevel))
self.shutdown()
return
# Otherwise we run the execution ourselves
with self.acquire_lock():
fire_event('manager.execute.started', self)
self.task_queue.start()
self.execute(options)
self.shutdown(finish_queue=True)
self.task_queue.wait()
fire_event('manager.execute.completed', self)
def daemon_command(self, options):
"""
Fires events:
* manager.daemon.started
* manager.daemon.completed
:param options: argparse options
"""
if options.action == 'start':
with self.acquire_lock():
if options.daemonize:
self.daemonize()
try:
signal.signal(signal.SIGTERM, self._handle_sigterm)
except ValueError as e:
# If flexget is being called from another script, e.g. windows service helper, and we are not the
# main thread, this error will occur.
log.debug('Error registering sigterm handler: %s' % e)
self.is_daemon = True
self.ipc_server.start()
fire_event('manager.daemon.started', self)
self.task_queue.start()
self.task_queue.wait()
fire_event('manager.daemon.completed', self)
elif options.action == 'status':
ipc_info = self.check_ipc_info()
if ipc_info:
log.info('Daemon running. (PID: %s)' % ipc_info['pid'])
else:
log.info('No daemon appears to be running for this config.')
elif options.action in ['stop', 'reload']:
ipc_info = self.check_ipc_info()
if ipc_info:
try:
client = IPCClient(ipc_info['port'], ipc_info['password'])
except ValueError as e:
log.error(e)
else:
if options.action == 'stop':
client.shutdown()
elif options.action == 'reload':
client.reload()
self.shutdown()
else:
log.error('There does not appear to be a daemon running.')
def webui_command(self, options):
"""
:param options: argparse options
"""
# TODO: make webui an enablable plugin in regular daemon mode
try:
pkg_resources.require('flexget[webui]')
except pkg_resources.DistributionNotFound as e:
log.error('Dependency not met. %s' % e)
log.error('Webui dependencies not installed. You can use `pip install flexget[webui]` to install them.')
self.shutdown()
return
if options.daemonize:
self.daemonize()
from flexget.ui import webui
with self.acquire_lock():
self.ipc_server.start()
self.task_queue.start()
webui.start(self)
self.task_queue.wait()
def _handle_sigterm(self, signum, frame):
log.info('Got SIGTERM. Shutting down.')
self.shutdown(finish_queue=False)
def setup_yaml(self):
"""Sets up the yaml loader to return unicode objects for strings by default"""
def construct_yaml_str(self, node):
# Override the default string handling function
# to always return unicode objects
return self.construct_scalar(node)
yaml.Loader.add_constructor(u'tag:yaml.org,2002:str', construct_yaml_str)
yaml.SafeLoader.add_constructor(u'tag:yaml.org,2002:str', construct_yaml_str)
# Set up the dumper to not tag every string with !!python/unicode
def unicode_representer(dumper, uni):
node = yaml.ScalarNode(tag=u'tag:yaml.org,2002:str', value=uni)
return node
yaml.add_representer(unicode, unicode_representer)
# Set up the dumper to increase the indent for lists
def increase_indent_wrapper(func):
def increase_indent(self, flow=False, indentless=False):
func(self, flow, False)
return increase_indent
yaml.Dumper.increase_indent = increase_indent_wrapper(yaml.Dumper.increase_indent)
yaml.SafeDumper.increase_indent = increase_indent_wrapper(yaml.SafeDumper.increase_indent)
def find_config(self, create=False):
"""
Find the configuration file.
:param bool create: If a config file is not found, and create is True, one will be created in the home folder
"""
config = None
home_path = os.path.join(os.path.expanduser('~'), '.flexget')
options_config = os.path.expanduser(self.options.config)
possible = []
if os.path.isabs(options_config):
# explicit path given, don't try anything
config = options_config
possible = [config]
else:
log.debug('Figuring out config load paths')
try:
possible.append(os.getcwdu())
except OSError:
log.debug('current directory invalid, not searching for config there')
# for virtualenv / dev sandbox
if hasattr(sys, 'real_prefix'):
log.debug('Adding virtualenv path')
possible.append(sys.prefix.decode(sys.getfilesystemencoding()))
# normal lookup locations
possible.append(home_path)
if sys.platform.startswith('win'):
# On windows look in ~/flexget as well, as explorer does not let you create a folder starting with a dot
home_path = os.path.join(os.path.expanduser('~'), 'flexget')
possible.append(home_path)
else:
# The freedesktop.org standard config location
xdg_config = os.environ.get('XDG_CONFIG_HOME', os.path.join(os.path.expanduser('~'), '.config'))
possible.append(os.path.join(xdg_config, 'flexget'))
for path in possible:
config = os.path.join(path, options_config)
if os.path.exists(config):
log.debug('Found config: %s' % config)
break
else:
config = None
if not (config and os.path.exists(config)):
if not create:
log.info('Tried to read from: %s' % ', '.join(possible))
log.critical('Failed to find configuration file %s' % options_config)
sys.exit(1)
config = os.path.join(home_path, options_config)
log.info('Config file %s not found. Creating new config %s' % (options_config, config))
with open(config, 'w') as newconfig:
# Write empty tasks to the config
newconfig.write(yaml.dump({'tasks': {}}))
log.debug('Config file %s selected' % config)
self.config_path = config
self.config_name = os.path.splitext(os.path.basename(config))[0]
self.config_base = os.path.normpath(os.path.dirname(config))
self.lockfile = os.path.join(self.config_base, '.%s-lock' % self.config_name)
def load_config(self):
"""
Loads the config file from disk, validates and activates it.
:raises: `ValueError` if there is a problem loading the config file
"""
fire_event('manager.before_config_load', self)
with codecs.open(self.config_path, 'rb', 'utf-8') as f:
try:
raw_config = f.read()
except UnicodeDecodeError:
log.critical('Config file must be UTF-8 encoded.')
raise ValueError('Config file is not UTF-8 encoded')
try:
config = yaml.safe_load(raw_config) or {}
except Exception as e:
msg = str(e).replace('\n', ' ')
msg = ' '.join(msg.split())
log.critical(msg)
print('')
print('-' * 79)
print(' Malformed configuration file (check messages above). Common reasons:')
print('-' * 79)
print('')
print(' o Indentation error')
print(' o Missing : from end of the line')
print(' o Non ASCII characters (use UTF8)')
print(' o If text contains any of :[]{}% characters it must be single-quoted ' \
'(eg. value{1} should be \'value{1}\')\n')
# Not very good practice but we get several kind of exceptions here, I'm not even sure all of them
# At least: ReaderError, YmlScannerError (or something like that)
if hasattr(e, 'problem') and hasattr(e, 'context_mark') and hasattr(e, 'problem_mark'):
lines = 0
if e.problem is not None:
print(' Reason: %s\n' % e.problem)
if e.problem == 'mapping values are not allowed here':
print(' ----> MOST LIKELY REASON: Missing : from end of the line!')
print('')
if e.context_mark is not None:
print(' Check configuration near line %s, column %s' % (e.context_mark.line, e.context_mark.column))
lines += 1
if e.problem_mark is not None:
print(' Check configuration near line %s, column %s' % (e.problem_mark.line, e.problem_mark.column))
lines += 1
if lines:
print('')
if lines == 1:
print(' Fault is almost always in this or previous line\n')
if lines == 2:
print(' Fault is almost always in one of these lines or previous ones\n')
# When --debug escalate to full stacktrace
if self.options.debug:
raise
raise ValueError('Config file is not valid YAML')
# config loaded successfully
log.debug('config_name: %s' % self.config_name)
log.debug('config_base: %s' % self.config_base)
# Install the newly loaded config
self.update_config(config)
def update_config(self, config):
"""
Provide a new config for the manager to use.
:raises: `ValueError` and rolls back to previous config if the provided config is not valid.
"""
old_config = self.config
self.config = config
errors = self.validate_config()
if errors:
for error in errors:
log.critical("[%s] %s", error.json_pointer, error.message)
log.debug('invalid config, rolling back')
self.config = old_config
raise ValueError('Config did not pass schema validation')
log.debug('New config data loaded.')
fire_event('manager.config_updated', self)
def save_config(self):
"""Dumps current config to yaml config file"""
# Back up the user's current config before overwriting
backup_path = os.path.join(self.config_base,
'%s-%s.bak' % (self.config_name, datetime.now().strftime('%y%m%d%H%M%S')))
log.debug('backing up old config to %s before new save' % backup_path)
shutil.copy(self.config_path, backup_path)
with open(self.config_path, 'w') as config_file:
config_file.write(yaml.dump(self.config, default_flow_style=False))
def config_changed(self):
"""Makes sure that all tasks will have the config_modified flag come out true on the next run.
Useful when changing the db and all tasks need to be completely reprocessed."""
from flexget.task import config_changed
for task in self.tasks:
config_changed(task)
def validate_config(self):
"""
Check all root level keywords are valid.
:returns: A list of `ValidationError`s
"""
fire_event('manager.before_config_validate', self)
return config_schema.process_config(self.config)
def init_sqlalchemy(self):
"""Initialize SQLAlchemy"""
try:
if [int(part) for part in sqlalchemy.__version__.split('.')] < [0, 7, 0]:
print('FATAL: SQLAlchemy 0.7.0 or newer required. Please upgrade your SQLAlchemy.', file=sys.stderr)
sys.exit(1)
except ValueError as e:
log.critical('Failed to check SQLAlchemy version, you may need to upgrade it')
# SQLAlchemy
if self.database_uri is None:
self.db_filename = os.path.join(self.config_base, 'db-%s.sqlite' % self.config_name)
if self.options.test:
db_test_filename = os.path.join(self.config_base, 'test-%s.sqlite' % self.config_name)
log.info('Test mode, creating a copy from database ...')
if os.path.exists(self.db_filename):
shutil.copy(self.db_filename, db_test_filename)
self.db_filename = db_test_filename
# Different database, different lock file
self.lockfile = os.path.join(self.config_base, '.test-%s-lock' % self.config_name)
log.info('Test database created')
# in case running on windows, needs double \\
filename = self.db_filename.replace('\\', '\\\\')
self.database_uri = 'sqlite:///%s' % filename
if self.db_filename and not os.path.exists(self.db_filename):
log.verbose('Creating new database %s ...' % self.db_filename)
# fire up the engine
log.debug('Connecting to: %s' % self.database_uri)
try:
self.engine = sqlalchemy.create_engine(self.database_uri,
echo=self.options.debug_sql,
poolclass=SingletonThreadPool,
connect_args={'check_same_thread': False}) # assert_unicode=True
except ImportError:
print('FATAL: Unable to use SQLite. Are you running Python 2.5 - 2.7 ?\n'
'Python should normally have SQLite support built in.\n'
'If you\'re running correct version of Python then it is not equipped with SQLite.\n'
'You can try installing `pysqlite`. If you have compiled python yourself, '
'recompile it with SQLite support.', file=sys.stderr)
sys.exit(1)
Session.configure(bind=self.engine)
# create all tables, doesn't do anything to existing tables
try:
def before_table_create(event, target, bind, tables=None, **kw):
if tables:
# We need to acquire a lock if we are creating new tables
# TODO: Detect if any database upgrading is needed and acquire the lock only in one place
self.acquire_lock(event=False).__enter__()
Base.metadata.append_ddl_listener('before-create', before_table_create)
Base.metadata.create_all(bind=self.engine)
except OperationalError as e:
if os.path.exists(self.db_filename):
print('%s - make sure you have write permissions to file %s' %
(e.message, self.db_filename), file=sys.stderr)
else:
print('%s - make sure you have write permissions to directory %s' %
(e.message, self.config_base), file=sys.stderr)
raise
def _read_lock(self):
"""
Read the values from the lock file. Returns None if there is no current lock file.
"""
if self.lockfile and os.path.exists(self.lockfile):
result = {}
with open(self.lockfile) as f:
lines = [l for l in f.readlines() if l]
for line in lines:
try:
key, value = line.split(b':', 1)
except ValueError:
log.debug('Invalid line in lock file: %s' % line)
continue
result[key.strip().lower()] = value.strip()
for key in result:
if result[key].isdigit():
result[key] = int(result[key])
result.setdefault('pid', None)
if not result['pid']:
log.error('Invalid lock file. Make sure FlexGet is not running, then delete it.')
elif not pid_exists(result['pid']):
return None
return result
return None
def check_lock(self):
"""Returns True if there is a lock on the database."""
lock_info = self._read_lock()
if not lock_info:
return False
# Don't count it if we hold the lock
if os.getpid() == lock_info['pid']:
return False
return True
def check_ipc_info(self):
"""If a daemon has a lock on the database, return info to connect to IPC."""
lock_info = self._read_lock()
if lock_info and 'port' in lock_info:
return lock_info
return None
@contextmanager
def acquire_lock(self, event=True):
"""
:param bool event: If True, the 'manager.lock_acquired' event will be fired after a lock is obtained
"""
acquired = False
try:
# Don't do anything if we already have a lock. This means only the outermost call will release the lock file
if not self._has_lock:
# Exit if there is an existing lock.
if self.check_lock():
with open(self.lockfile) as f:
pid = f.read()
print('Another process (%s) is running, will exit.' % pid.split('\n')[0], file=sys.stderr)
print('If you\'re sure there is no other instance running, delete %s' % self.lockfile,
file=sys.stderr)
sys.exit(1)
self._has_lock = True
self.write_lock()
acquired = True
if event:
fire_event('manager.lock_acquired', self)
yield
finally:
if acquired:
self.release_lock()
self._has_lock = False
def write_lock(self, ipc_info=None):
assert self._has_lock
with open(self.lockfile, 'w') as f:
f.write(b'PID: %s\n' % os.getpid())
if ipc_info:
for key in sorted(ipc_info):
f.write(b'%s: %s\n' % (key, ipc_info[key]))
def release_lock(self):
if os.path.exists(self.lockfile):
os.remove(self.lockfile)
log.debug('Removed %s' % self.lockfile)
else:
log.debug('Lockfile %s not found' % self.lockfile)
def daemonize(self):
"""Daemonizes the current process. Returns the new pid"""
if sys.platform.startswith('win'):
log.error('Cannot daemonize on windows')
return
if threading.activeCount() != 1:
log.critical('There are %r active threads. '
'Daemonizing now may cause strange failures.' % threading.enumerate())
log.info('Daemonizing...')
try:
pid = os.fork()
if pid > 0:
# Don't run the exit handlers on the parent
atexit._exithandlers = []
# exit first parent
sys.exit(0)
except OSError as e:
sys.stderr.write('fork #1 failed: %d (%s)\n' % (e.errno, e.strerror))
sys.exit(1)
# decouple from parent environment
os.chdir('/')
os.setsid()
os.umask(0)
# do second fork
try:
pid = os.fork()
if pid > 0:
# Don't run the exit handlers on the parent
atexit._exithandlers = []
# exit from second parent
sys.exit(0)
except OSError as e:
sys.stderr.write('fork #2 failed: %d (%s)\n' % (e.errno, e.strerror))
sys.exit(1)
log.info('Daemonize complete. New PID: %s' % os.getpid())
# redirect standard file descriptors
sys.stdout.flush()
sys.stderr.flush()
si = file('/dev/null', 'r')
so = file('/dev/null', 'a+')
se = file('/dev/null', 'a+', 0)
os.dup2(si.fileno(), sys.stdin.fileno())
os.dup2(so.fileno(), sys.stdout.fileno())
os.dup2(se.fileno(), sys.stderr.fileno())
# If we have a lock, update the lock file with our new pid
if self._has_lock:
self.write_lock()
def db_cleanup(self, force=False):
"""
Perform database cleanup if cleanup interval has been met.
Fires events:
* manager.db_cleanup
If interval was met. Gives session to do the cleanup as a parameter.
:param bool force: Run the cleanup no matter whether the interval has been met.
"""
expired = self.persist.get('last_cleanup', datetime(1900, 1, 1)) < datetime.now() - DB_CLEANUP_INTERVAL
if force or expired:
log.info('Running database cleanup.')
session = Session()
try:
fire_event('manager.db_cleanup', session)
session.commit()
finally:
session.close()
# Just in case some plugin was overzealous in its cleaning, mark the config changed
self.config_changed()
self.persist['last_cleanup'] = datetime.now()
else:
log.debug('Not running db cleanup, last run %s' % self.persist.get('last_cleanup'))
def shutdown(self, finish_queue=True):
"""
Request manager shutdown.
:param bool finish_queue: Should scheduler finish the task queue
"""
self.task_queue.shutdown(finish_queue)
def _shutdown(self):
"""Runs when the manager is done processing everything."""
fire_event('manager.shutdown', self)
if not self.unit_test: # don't scroll "nosetests" summary results when logging is enabled
log.debug('Shutting down')
self.engine.dispose()
# remove temporary database used in test mode
if self.options.test:
if not 'test' in self.db_filename:
raise Exception('trying to delete non test database?')
if self._has_lock:
os.remove(self.db_filename)
log.info('Removed test database')
if not self.unit_test: # don't scroll "nosetests" summary results when logging is enabled
log.debug('Shutdown completed')