Mini Shell

# Check for bash
[ -z "$BASH_VERSION" ] && return

####################################################################################################

__app() {
  case "${COMP_CWORD}" in
    1)
      COMPREPLY=($(compgen -W "help version list-apps launch action list-actions" -- "${COMP_WORDS[1]}"))
      return 0
      ;;

    2)
      case "${COMP_WORDS[1]}" in
        launch|action|list-actions)
          COMPREPLY=($(compgen -W "`gapplication list-apps`" -- "${COMP_WORDS[2]}"))
          return 0
          ;;

        *)
          COMPREPLY=()
          return 0
          ;;
      esac
      ;;
  esac

  # Otherwise, what we will do is based on the command in ${COMP_WORDS[1]}
  case "${COMP_WORDS[1]}" in
    action)
      # Word 3 is the action name.  This is the only one we can help with.
      if [ "${COMP_CWORD}" == 3 ]; then
        COMPREPLY=($(compgen -W "`gapplication list-actions "${COMP_WORDS[2]}"`" -- "${COMP_WORDS[3]}"))
        return 0
      else
        COMPREPLY=()
        return 0
      fi
      ;;
    launch)
      # Filenames...
      COMPREPLY=($(compgen -A file "${COMP_WORDS[COMP_CWORD]}"))
      return 0
      ;;
    *)
      # Nothing else should be out this far...
      COMPREPLY=()
      return 0
  esac
}

####################################################################################################

complete -F __app gapplication