#!/bin/bash
iecho () {
[[ ! -z "$PS1" ]] && echo $1
}

#   no way to tell if sourced vs subshell
#   # [[ ! -z "$PS1" ]] && [[ $SHLVL -eq 1 ]] && echo $1
#   # echo [[ -z $PS1 ]]
#   echo $SHLVL
#   echo $$
#   echo $BASHPID
#   if [[ -t 1 ]]; then
#         echo "Terminal"
# else
#         echo "Not-a-terminal"
# fi