1 files changed, 2 insertions, 10 deletions
diff --git a/bin/grun b/bin/grun
index cfd6b52..982420a 100755
--- a/bin/grun
+++ b/bin/grun
@@ -71,16 +71,8 @@ while getopts 'rh' flag; do
 done
 shift $((OPTIND - 1))
 
-assert_arg() {
-	if [ -z "$1" ]; then
-		printf 'Missing %s\n\n' "$2" >&2
-		usage >&2
-		exit 2
-	fi
-}
-
 FILENAME="${1:-}"
-assert_arg "$FILENAME" 'FILENAME'
+eval "$(assert-arg "$FILENAME" 'FILENAME')"
 shift
 
 if [ "${1:-}" != '--' ]; then
@@ -90,7 +82,7 @@ if [ "${1:-}" != '--' ]; then
 fi
 shift
 
-assert_arg "${1:-}" 'COMMAND'
+eval "$(assert-arg "${1:-}" 'COMMAND')"
 
 
 if [ ! -e "$FILENAME" ]; then