fix _exists
@ -249,7 +249,7 @@ _exists() {
fi
if command >/dev/null 2>&1; then
command -v "$cmd" >/dev/null 2>&1
elif which >/dev/null 2>&1; then
elif which ls >/dev/null 2>&1; then
which "$cmd" >/dev/null 2>&1
ret="$?"