Bash autocompletion for ddev, fixes #125

[rfay]

The Problem:

Some of us are dependent on autocompletion. OP #125

The Fix:

Cobra supports bash completion, although it does not yet support (directly) zsh completion. The implementation is fairly straightforward into a separate binary.

The Test:

• build for your platform
• The completions generator will be in bin/.../ddev_gen_autocomplete, for example bin/darwin/darwin_amd64/ddev_gen_autocomplete
• run the generator, bin/darwin/darwin_amd64/ddev_gen_autocomplete and it will create bin/ddev_bash_completion.sh
• ddev_bash_completion.sh can be installed as ddev in /usr/local/etc/bash_completion.d/ddev or wherever you keep your bash completions.

Automation Overview:

Related Issue Link(s):

Release/Deployment notes:

After a new release (v0.8) is created, the homebrew recipe should support automatically installing the completions.

[tannerjfco]

The bash completion seems to work great, docs look good for it too. Really nice to have the auto-install for homebrew! Maybe we should add it as an installation method for Mac users in the docs.

[rfay]

Shucks, just realized we didn't get this into v0.7, it would have been fun to make homebrew work with it.

I think homebrew will probably make its way into the docs. It was kind of a back-door project and it hasn't actually been decided to support it yet.

Thanks for playing!