Provide bash completion

[robinkrahl]

nitrocli should provide a bash completion script (and possibly also completion for other shells). As writing it manually is tedious – especially with regard to nitrocli’s complicated command structure –, we should try to generate the completion script automatically.

A quick search only yielded one tool that might do that, auto-auto-complete. I did not yet evaluate whether we could use it with our command structure.

[d-e-s-o]

clap could actually do that for us as well. Not that I am suggestion we switch or anything :)

But I like the idea of generating such a script offline.

[d-e-s-o]

I've got a proof of concept working. Will see if it's possible to add tests and then send something out.

[d-e-s-o]

While not yet contained in a release, bash completion support has landed in devel. Extending support to other shells (zsh and fish) should be trivial (modulo adding tests, which certainly has taken me longer than the actual feature...), but I am still on bash and have no real use for those. So let's add them once demand has been expressed. Closing accordingly.

Robin, if there is something that you perceive as lacking feel free to reopen.