Package: angelic
An API for daemonizationInstallationFrom the project root directory:$ python setup.py installOr just install with pip:$ pip install angelicUsageAdd it to the top of your programs:from angelic import Daemon
daemon = Daemon('app_name')Then wrap your looping function:@daemon.daemonize
def loop(...):
    while True:
        ...Or specify an interval and have it loop automatically and wait specified seconds:@daemon.daemonize(interval=10)
def loop(...):
    ...Then add to the bottom of your program:daemon.run(...)The arguments to the daemonized function will be passed from the call to run.Check Argument Parsing below for more options for starting and stopping your daemon.See an example implementation here:http://pastebin.com/uZjxU99SConfigurationSpecify a pid_path with that keyword. Otherwise, it will look for pid_path in all
of the possible config paths, and last, /var/run/$DAEMON_NAME.pid will be chosen:daemon = Daemon('myapp', pid_path='~/myapp.pid')The configuration files will be loaded automatically based on the name of the app, unless
config_path is passed to Daemon. See the pypi packageconfutilfor more information
about the configuration logic and usage.The order that configuration files will be parsed, from most authoritative to least is
(for a daemon named ‘spam’):./.spam.conf./.spam.cfg~/.spam.conf~/.spam.cfg~/.config/.spam.conf~/.config/.spam.cfg~/.config/spam/config.conf~/.config/spam/config.cfg~/.config/spam/config/etc/.spam.conf/etc/.spam.cfg/etc/spam/config.conf/etc/spam/config.cfg/etc/spam/configTo specify an explicit configuration file, pass in the path. The interface will be like a dict,
specifically a ConfigObj object:daemon = Daemon('myapp', config_path='~/.myapp.config')
password = daemon.config['password']Redirecting STDOUT or STDERRBy default, the daemon will still print its stderr to stderr, and squelch stdout.
To change this behavior, either set the keywords to themself, or None for muting:# prints stderr to stderr
daemon = Daemon('myapp')
# Keeps stdout, but mutes stderr
daemon = Daemon('myapp', stdout='stdout', stderr=None)
# Mutes both stdout and stderr
daemon = Daemon('myapp', stderr=None)
# Writes stderr to a file at path /var/log/myapp_raw_stderr
daemon = Daemon('myapp', stderr='/var/log/myapp_raw_stderr')It is recommended to keep stderr (default) so that you can debug exceptions in your program.LoggingA simple logger can be instanciated with the Daemon by passing in an argument to its
log paths. For example:daemon = Daemon(debug_log='/var/log/myapp_debug.log', error_log='/var/log/myapp_error.log')
daemon.log.error('Encountered an error!')Other possible logger arguments are info_log, warning_log, and critical_log.
If not provided in the keyword arguments, the configuration will be checked for debug_log, etc.Argument ParsingA simple start, stop, restart, status interface can be given with the following code:daemon.parse_args()To add arguments to the start command which will pass to the loop, do the following, create the subparsers first:@daemonize
def loop(debug=False):
    ...

def main():
    import argparse
    parser = argparse.ArgumentParser()
    subparsers = daemon.setup_args(parser)
    subparsers['start'].add_argument('--debug', '-d', action='store_true')
    daemon.parse_args(parser)Release Notes0.1.2:Just updated README with the simpler argparse functionality.0.1.1:Removed requirement to create argparser ArgumentParser.
Now, start/stop/restart/status interface can be created with justdaemon.parse_args()0.1.0:Daemonization works according to examples in this README0.0.1:Project created