I made a draft PR with bash support because I thought it was cool. https://github.com/pulumi/pulumi/pull/10307 just thought I'd share it here.

Ha this is interesting, bash (and powershell) support could be quite a hit with a lot of ops folk who are more used to shell languages. I don't think we'd implement it quite like you have, but I do appreciate the syntax suggestion of how this could look!