This PR adds `completion.zsh` to allow for relatively intelligent
completion of `repo` command-line arguments for all commands of the
`repo` CLI.
The `completion.zsh` can be added to your zsh completions by copying
(and renaming) the completion script to a directory that you have added
to your zsh completion path.
```
cp completion.zsh $ZSH_COMPLETION_DIRECTORY/_repo
```
You must name the file `_repo` for it to register as completion for
`repo`.
You can add a directory to your zsh completion by updating your `fpath`
variable before calling `compinit` as follows:
```
fpath=( /path/to/zsh-completions/dir $fpath )
```
Future work: Generate this file using the subcommand classes and python
reflection.
Change-Id: I6a4e785c1efcf9076bd693976ac03578836b691b
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/579561
Commit-Queue: Mike Frysinger <vapier@google.com>
Reviewed-by: Gavin Mak <gavinmak@google.com>
Tested-by: Kamal Sacranie <sacranie@google.com>
Reviewed-by: Mike Frysinger <vapier@google.com>
Kamal Sacranie