Schedule jobs to be run every day at sunrise and sunset.
This library will schedule a cron job to run every day. That job then calculates the time for sunrise and sunset and registers two at jobs. Each job will then call a script which can be configured.
$ npm i -g schedule-at-sunrise-and-sunset
On postintall this package will create the directory /usr/local/opt/at-sun where the current sample scripts provided with the repo will be installed.
You can replace those scripts with your own, or when you register an at-suncalc job, provide the arguments to the scheduler.
$ at-scheduler --now -- --sunrise start-hue-facade --sunset stop-hue-facade
The previous command will use start-hue-facade as the sunrise script, and stop-hue-facade as the sunset script. If you want to place your scripts in a different location, provide the --job-path option.
$ at-scheduler --now -- --job-path /opt/at-scripts
Make sure that your user has permissions to execute scripts in that directory.
The module consists of two scripts:
at-suncalc-datescheduler
The scheduler registers the cron job that will be responsible of registering the daily at sunset and at sunrise jobs.
Schedule configuration:
module.exports = {
id: 'hue-facade-test',
command: join(process.cwd(), 'bin', 'at-suncalc-date'),
when: '58 23 * * *',
comment: 'Scheduler for sunrise/sunset actions.'
};String used to identify the cron job. You can see it on the crontab. (i.e. using EDITOR=nano crontab -e)
The actual script that should be run. By default will be at-suncalc-date. When calling scheduler from the terminal, any arguments after the -- will be passed to the command script.
When should the cron job run? By default is every day at 23:58 and it will set the reference date to perform the sun calculations to "the next day, start of day".
String used to comment the cron job. You can see it on the crontab. (i.e. using EDITOR=nano crontab -e)
Execute scripts found at:
/usr/local/opt/at-sun
Wed Dec 16 23:22:00 2015-12-14
If you are on a Mac and you have not done this before, you need to enable the atrun daemon.
From a terminal window:
$ sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.atrun.plist
You can list your current queued jobs and their corresponding id with at -l, and to remove any job just atrm <job-id>.
For more information, use man at.
You might want to edit your crontab to include the $PATHs you need.
EDITOR=nano crontab -e
Then add the following:
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
If you don't then your shebangs might fail:
#!/usr/bin/env node
You might get mail stating that:
env: node: No such file or directory
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