Don't run the cron scheduled tox github workflow on forks

[zeitounator]

Note: Not really a bug (but didn't know where else to put it), more of an annoyance and not related to molecule itself but to the CI.

The following describes when to run the tox workflow in github actions
https://github.com/ansible-community/molecule/blob/6fdc8478662353ea8017d06f5027d8fc3e8d3ec8/.github/workflows/tox.yml#L3-L13

The cron schedule is triggered everywhere regardless of the actual repo. So it it also starts in each fork and most probably fails everywhere as it does in my current fork and sending mail alerts for failure if configured.

I see two problems with this:

• it is annoying for the owner of the fork
• it is consuming computing resources for somethings that does not need to happen at all

Reading a bit on the subject, it seems there is not yet any clean and straightforward way to fix that. The only workarround for the moment is to put a condition on each job in the workflow looking something like:

jobs:
  build:
    if: >- 
      (github.event_name == 'schedule' && github.repository == 'ansible-community/molecule')
      || (github.event_name != 'schedule')

which is definitively ugly and inefficient (needs to be repeated on each job in the workflow...)

There is a suggestion to enhance the schedule declaration with new keywords but it has not been picked-up nor answered yet.

I did not produce a PR as I feel the current workaround is not satisfactory. But I'm happy to do so. Just tell me.

Issue Type

• Bug report

Molecule and Ansible details

N/A: CI based

Molecule installation method (one of):
N/A: CI based

Ansible installation method (one of):
N/A: CI based

Detail any linters or test runners used:
None

Desired Behavior

The cron scheduled tox workflow does not run on forked repositories

Actual Behaviour

The cron scheduled tox workflow is running every day on forked repositories (and alerting for failure, at least on my fork)