Generate a bash_completion file on run

[twof]

I think that's what's happening here:
https://github.com/apple/swift-package-manager/blob/master/Sources/Commands/Completions%2Bbash.swift

[twof]

Another example implementation:
vapor/vapor#1347

[joscdk]

@twof the idea in #1347 is when you build a CLI e.g. Toolbox, you can include our template completion for bash and zsh in e.g. Homebrew.

The PR adds a --autocomplete so the completion real time gets all available commands from the CLI script, a bit different from what SPM file does :)

[twof]

So if I'm understanding correctly, SPM has a static bash_completion file, and vapor gets a list of the commands available and generates it on the fly?

[joscdk]

More or less. With the PR in Vapor, you will need to have the bash_completion file on your Mac/Linux .. This file will load available commands from the CLI script.

E.g. In the toolbox, it will automatically download and setup the autocompletion file on your computer in Homebrew/APT

We will also provide examples of bash completion files for people building their own CLI scripts :) .. This way it's easy to customize the bash completion file for your script if you want :)

Later we will also provide examples for zsh completion :)

[twof]

Awesome! Thanks for the explanation

[joscdk]

No problem :) .. Thought that would be the most flexible solution, and still keep loyal to the *nix system :) and have a really easy setup/maintenance