Shell autocompletions do not work after a `show` argument.

[souvlakias]

Example (Using zsh): ./mill show app.co<tab>does not complete to app.compile Is this expected?

[lihaoyi]

I think it's expected given the current implementation, as def show takes tasks: String* so the autocomplete logic doesn't know it should treat the arguments as tasks

There may be some ways we can improve upon this though, maybe by adding additional annotations on tasks so Mill knows it's a tasks: String contains task selectors and not just arbitrary strings