[GH-1505] add documentation regarding autocompletion for velero CLI

[cpanato]

• Add documentation in how to setup autocompletion for Velero CLI

  fixes: bash completion not working on macos #1505

Instructions tested on:

• Linux Ubuntu 18.04 - bash
• Linux Ubuntu 18.04 - zsh
• macOS Catalina - bash
• macOS Catalina - zsh

[skriss]

Thanks for this @cpanato, this is great! I tried out the macOS instructions and they worked liked a charm 👍

The only thought I have is that we might want to locate this on a different page, to avoid making the "basic install" page too cluttered. One option would be to create a new page with this info, and add a link to it right at the bottom of the "Install the CLI" section. What does everyone think?

[ashish-amarnath]

I agree with @skriss We might want to relocate this on the Customize-Installation page.

[cpanato]

@skriss @ashish-amarnath done, please let me know your thoughts

[ashish-amarnath]

LGTM! 👍
We should provide similar documentation for v1.2.0

[cpanato]

@ashish-amarnath should I open another PR when this gets merge to cherry-pick this changes to the v1.2.0?

[skriss]

LGTM. @cpanato to replicate this addition for the v1.2.0 docs, you'll need to manually apply the same changes to the docs under site/docs/v1.2.0. We usually do this in the same PR as the site/docs/master changes. Once you do that, I think we're good to merge here!

[cpanato]

@skriss done added the docs to 1.2.0
thanks for pointing out

[skriss]

LGTM. @ashish-amarnath please take another look when you get a chance.

Thanks again @cpanato!

[carlisia]

Thank you! 💯