Issue: schedule configuration not validated, allowing invalid syntax

[Stretch96]

Hello 👋

Found what may be either a bug, or might be an intentional

If act is to be used as a way to verify workflow syntax, then I think this might be a bug

act will succeed with invalid schedule syntax

Act version

$ act --version
act version 0.2.20

Expected behaviour

name: example
on:
  schedule:
    cron: '0 10 * * *'

act should fail because GitHub expects schedule to be a list

Running this on GitHub, the error is shown:

`\`schedule\` accepts a list of one or more maps with the \`cron\` key set`

Actual behaviour

act ignores schedule references by default as far as I can tell

Working workflow

on:
  schedule:
    - cron: '0 10 * * *'

Difference being the -, which makes schedule a list rather than map. Which is what GitHub expects

[github-actions]

Issue is stale and will be closed in 14 days unless there is new activity

[ZauberNerd]

Check out https://github.com/rhysd/actionlint to lint your workflow files.

[catthehacker]

@nektos/act-maintainers do we want to implement that?

[KnisterPeter]

Not sure, we are up to now, don't validate the workflow files. We talked about integrating actionlint for that.
I guess validating cron should belong in there.