GitHub Actions: Detecting the operating system with $runner.os

[cclauss]

https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/store-information-in-variables#detecting-the-operating-system

[hukkin]

Thanks, this seems good, but looking at the CI status page, GitHub Actions status is "Startup failure" and there's an error:

Invalid workflow file: .github/workflows/tests.yaml#L83
The workflow is not valid. .github/workflows/tests.yaml (Line: 83, Col: 11): Unrecognized named-value: 'runner'. Located at position 1 within expression: runner.os

Not sure why it cannot access the runner property.

[cclauss]

Closing. $runner is not available until the steps: start executing. 😭