Initial autocompletion

[brianshumate]

Initial autocomplete spike!

• This begins to address Integrate new autocompletion support in mitchellh.cli #3291 by enabling the initial for-free sub-command
  autocompletion feature from mitchellh/cli

I vendored latest CLI and verified consul -autocomplete-install and basic sub-command completion was occurring for me in zsh 🎉

Had to add Name: as well because Autocomplete errors without it:

./consul
Error executing CLI: internal error: CLI.Name must be specified for autocomplete to work

As I understand it, there needs to be additional work done for completion on specific CLI flags and such to make things more complete / even fancier. 😄 but perhaps this is a good start?!

[slackpad]

Hey @brianshumate this looks good! Can you please add a note about this in the docs?

[brianshumate]

Hey James,

Thanks and sure thing, I'll add a note shortly and PR that as well!

[brianshumate]

Okay added an Autocompletion section to the Commands docs!

[slackpad]

@brianshumate sorry I didn't get back to this. Want to do a quick rebase and I think we will be good here.

[slackpad]

raft is actually a subcommand of operator which looks like a limitation of the autocomplete library.

[brianshumate]

Yeah I noticed that it doesn't do sub-sub commands

[preetapan]

I tried this out just now and it worked on sub subcommands too, this is pretty cool.

preetha@preetha-work ~/go/src/github.com/hashicorp/consul-oss (jbs-autocomplete) $consul r
reload  rtt     
preetha@preetha-work ~/go/src/github.com/hashicorp/consul-oss (jbs-autocomplete) $consul r
reload  rtt     
preetha@preetha-work ~/go/src/github.com/hashicorp/consul-oss (jbs-autocomplete) $consul operator 
autopilot  raft       
preetha@preetha-work ~/go/src/github.com/hashicorp/consul-oss (jbs-autocomplete) $consul operator raft 
list-peers   remove-peer  

[preetapan]

I'll update the documentation and then merge this. this is ready to go