Move from gh to hub, the new official GitHub CLI

[edubxb]

The project gh has been adopted as the new official GitHub CLI (hub).

See this: mislav/hub#475

So it is necessary to update:

plugins/available/gh.plugin.bash
completion/available/gh.completion.bash

[edubxb]

The completion file is basically the same for gh and hub, the command name has changed and some minor changes, I think.

Now hub is in a release candidate state, so we can do the update when finally released.

Additionally, we can add an alias to maintain compatibility (alias gh=hub)

[edubxb]

Another option is to have separate plugins+completion, one for gh, and other for hub.

[nwinkler]

Wouldn't it be easier to detect whether the gh or hub command is available?

command -v gh >/dev/null 2>&1 && eval "$(gh alias -s)"
command -v hub >/dev/null 2>&1 && eval "$(hub alias -s)"

Same for the completion.

If there's a chance that you want to have both gh and hub installed, one of them will have to have a higher priority, since you can't alias them both to git.

If the differences are significant, I agree that it would be better to have two different plugin/completion files. If it's just the name of the command, it should be possible to detect which one is installed and then alias that.

[tswicegood]

👍 for detecting where we can. FWIW, I use hub, so I wouldn't want to do anything that messes with that.

[edubxb]

Done in PR #562