[ -e "$target.do" ] || _find_dofile "$target"
if [ ! -e "$dofile" ]; then
# If .do file does not exist and target exists, it is a source file.
[ -e "$target.do" ] || _find_dofile "$target"
if [ ! -e "$dofile" ]; then
# If .do file does not exist and target exists, it is a source file.