Add daily CI jobs to all our repositories

[fingolfin]

A recent change to Singular_jll broke Singular.jl but that's not visible at https://github.com/oscar-system/Singular.jl/actions because the CI there run the last time two weeks ago.

In general it can happen that a package breaks due to changes in one of its dependencies.

Thus I think we should set up our repositories to ensure that the CI jobs are run at least once a day.

E.g. in GAP we do that, see https://github.com/gap-system/gap/blob/master/.github/workflows/CI.yml by adding this to the on: trigger in the YAML file of the relevant job:

  schedule:
    # Every day at 2:30 AM UTC
    - cron: '30 2 * * *'

[thofma]

How will we notice that this fails?

[fingolfin]

This is of value even if we don't "notice" it immediately: right now, all we saw was that Singular.jl worked two weeks ago and now ... might or might not work (as CI did not run yet). With a cron job, we'd be able to say "it broke on day X" which often is quite useful. E.g. "it was not yet broken yesterday, after the JLL update, so it is likely unrelated to that".

That said, for GAP we have configured it so that the CI job posts an update to Slack whenever the state changes (i.e. when it starts to FAIL or starts to SUCCEED)

[fingolfin]

@HereAround will look into it with @aaruni96 once the latter is back ;-)

[HereAround]

A first PR regarding this issue is here: oscar-system/Singular.jl#825

[HereAround]

• Singular.jl: Run tests jobs daily at 3:00AM UTC Singular.jl#825
• Polymake.jl: Add daily CI jobs  Polymake.jl#499
• GAP.jl: Add daily tests  GAP.jl#1048
• Oscar.jl: Add daily tests #4127
• Hecke.jl: Daily tests thofma/Hecke.jl#1620
• AbstractAlgebra.jl: Add daily jobs  Nemocas/AbstractAlgebra.jl#1805
• Nemo.jl: Add daily jobs  Nemocas/Nemo.jl#1859

[benlorenz]

I do see the point in running the package CI daily but I'm not sure if we need many hours of OscarCI running in each repo?

[HereAround]

I do see the point in running the package CI daily but I'm not sure if we need many hours of OscarCI running in each repo?

I agree. Since I was not sure which tests could be skipped/ignored, I added all for now.