Fall back to sh on non-Windows

[ncfavier]

Fixes #13

[yoannchaudet]

Will get that merged after #16 which adds some tests so we don't regress anything.

[JamesMGreene]

My suspicion is that we would actually be safer by just not specifying the shell and allowing Actions to try for the bash executable and then fallback to sh if it wasn't found. The documentation seems to read like specifying bash explicitly will also fallback like that but it sounds like that may not be the case based on the report in #13. 🤔

[ncfavier]

Weirdly enough, removing shell in the action fails: https://github.com/ncfavier/1lab/runs/7919247403?check_suite_focus=true

[JamesMGreene]

Ah, yeah, there it is in the docs. 🔍

runs.steps[*].shell

Optional The shell where you want to run the command. You can use any of the shells listed here.
👉🏻 Required if run is set. 👈🏻

My apologies for recommending it without reading the composite Actions docs further. 😅
Thanks for the catch, @ncfavier! 🙇🏻‍♂️

[ncfavier]

Any updates on this?

[yoannchaudet]

🚀 !