# Enables rbfu with --auto option, if available.
  #
  # Also provides a command to list all installed/available
  # rubies. To ensure compatibility with themes, creates the
  # rvm_prompt_info function to return the $RBFU_RUBY_VERSION
  # version.
  
  command -v rbfu &>/dev/null
  
  if [[ $? -eq 0 ]]; then
    eval "$(rbfu --init --auto)"
  
    # Internal: Print ruby version details, if it's currently
    # active etc.
    function _rbfu_rubies_print() {
      local rb rb_out
      rb=$(basename $1)
      rb_out="$rb"
      [[ -h $1 ]] && rb_out="$rb_out${fg[green]}@${reset_color}"
      [[ "x$rb" == "x$2" ]] && rb_out="${fg[red]}$rb_out ${fg[red]}*${reset_color}"
      echo $rb_out
    }
  
    # Public: Provide a list with all available rubies, this basically depends
    # on `ls -1` and .rfbu/rubies. Highlights the currently active ruby version
    # and aliases.
    function rbfu-rubies() {
      local rbfu_dir active_rb
      rbfu_dir=$RBFU_RUBIES
      active_rb=$RBFU_RUBY_VERSION
      [[ -z "$rbfu_dir" ]] && rbfu_dir="${HOME}/.rbfu/rubies"
      [[ -z "$active_rb" ]] && active_rb="system"
      _rbfu_rubies_print "${rbfu_dir}/system" $active_rb
      for rb in $(ls -1 $rbfu_dir); do
        _rbfu_rubies_print "${rbfu_dir}/${rb}" $active_rb
      done
    }
  
    # Public: Create rvm_prompt_info command for themes compatibility, unless
    # it has already been defined.
    [ ! -x rvm_prompt_info ] && function rvm_prompt_info() { echo "${RBFU_RUBY_VERSION:=system}" }
  fi