echo "do whatever $PATH $BASH $PS1 $0"

bash -lc 'echo "do whatever $PATH $BASH $PS1 $0"'

source /etc/profile;echo "do whatever $PATH $BASH $PS1 $0"

THING_HOME="/opt/thing"
PATH="$PATH:/opt/thing" # this will NOT work

# If not running interactively, don't do anything
[ -z "$PS1" ] && return