# Ideally, we'd use plain old ed(1), but many Linux distributions don't install # it by default if command -v ed >/dev/null 2>&1 ; then EDITOR='ed' # Failing that, if the system's implementation of ex(1) looks like Vim and we # have exm(1df) in our $PATH, use the latter to work around Vim's ex mode # screen-clearing elif ( command -v ex >/dev/null 2>&1 || exit 1 command -v exm >/dev/null 2>&1 || exit 1 ver=$(ex --version 2>/dev/null | awk '{print $1;exit}') case $ver in (VIM) exit 0 ;; (*) exit 1 ;; esac ) >/dev/null 2>&1 ; then EDITOR='exm' # Otherwise, we can just call ex(1) directly else EDITOR='ex' fi export EDITOR