This is kind of far out there, and I'm not sure it should go in the main Accumulo project, but we have a lot of utilities that can be run off of the bin/accumulo command, including all the bin/accumulo admin commands. My preferred shell is bash, and bash supports an extensible mechanism to add autocompletion to commands. It would be neat to be able to provide a completer script to be used with bash, to make it easier to use the bin/accumulo command.

Some references:

• https://www.gnu.org/software/bash/manual/html_node/Programmable-Completion.html
• https://superuser.com/a/289559
• https://opensource.com/article/18/3/creating-bash-completion-script

If we shipped this, I'd imagine it'd be shipped as part of some "extras" package, rather than part of Accumulo's core build.