Pachctl Auto-completion

Pachyderm auto-completion allows you to automatically finish partially typed commands by pressing TAB.

Before You Start #

Verify that bash-completion is installed on your machine. For example, if you have installed bash completion by using Homebrew, type:
```
brew info bash-completion
```
This command returns information about the directory in which bash-completion and bash completion scripts are installed. For example, /usr/local/etc/bash_completion.d/. You need to specify the path to bash_completion.d as the path to which install pachctl autocompletion. Also, the output of the info command might have a suggestion to include the path to bash-completion into your ~/.bash_profile file.
Install pachctl autocompletion:
```
pachctl completion bash --install --path <path/to/bash-completion>
```
For example, if you specify the path to bash-completion as /usr/local/etc/bash_completion.d/pachctl, your system response looks like this:

System response:
```
Bash completions installed in /usr/local/etc/bash_completion.d/pachctl, you must restart bash to enable completions.
```
Restart your terminal. pachctl autocomplete should now be enabled in your system.

You can perform the following tests to verify that pachctl autocompletion is working:

Hit TAB. You should see the following output:

validate  -- Validate the specification of a Pachyderm resource.
version   -- Print Pachyderm version information.