Question: What kind of cron flavor is used?

[kris9854]

Question

Any one know what kind of cron implementation is used by semaphore UI?

Want to schedule somehting for tue if it falls between the 15-21 at 12 o clock.

I know that if it is utc time i need to say at 0 10. But it kinda weird that 0 12 15-21 * 2 doesn't work. Also tried using the timer format:

Tue *-*-15..21 12:00:00

Related to

Service (scheduled tasks, alerts)

[fiftin]

Hi @kris9854 Package https://github.com/robfig/cron used for Schedules on backend and https://www.npmjs.com/package/cron-parser for frontend.

[kris9854]

@fiftin thanks. Soo i can't do it like i want :/ Do you maybe have an idear on how to go around it? Wrapper bash script that just calls a integration to start the template job?

Want to schedule a playbook to run on the 3th of tuesday in every month :)

[fiftin]

Hi @kris9854

1. robfig/cron understands this expression 0 12 15-21 * 2, so it should works. I will try to reproduce the issue.

2. I will remove npm package cron-parser and add API endpoint to calculate next run time on backend.

[kris9854]

@fiftin is there any update on this :) Asking because I want to leverage cron to do some scheduled tasks :)

[Arceopteryx]

I'm curious about this as well, scheduling tasks is important to us.

[fiftin]

Hi @kris9854 I'm so sorry for delay.

I debugging the issue and I found only UI bug. Cron record 0 12 15-21 * 2 works as expected.

[fiftin]

@kris9854 I have checked two libraries, and they behave similarly: the day of month and day of week fields are combined using OR, not AND.

[fiftin]

I improved UI:

[fiftin]

I convert this issue to discussion because it is useful question but not a bug.