bin/color: Replace ad-hoc `assert_arg()` with `assert-arg`

1 files changed, 4 insertions, 10 deletions

diff --git a/bin/color b/bin/color
index d03a232..05ef95b 100755
--- a/bin/color
+++ b/bin/color
@@ -175,6 +175,7 @@ for flag in "$@"; do
 	esac
 done
 
+COLOR_FN=''
 while getopts 'c:h' flag; do
 	case "$flag" in
 		c)
@@ -204,17 +205,10 @@ while getopts 'c:h' flag; do
 done
 shift $((OPTIND - 1))
 
-assert_arg() {
-	if [ -z "$1" ]; then
-		printf 'Missing %s\n\n' "$2" >&2
-		usage >&2
-		exit 2
-	fi
-}
-
 TEXT="${1:-}"
-assert_arg "$COLOR_FN" '-c COLOR'
-assert_arg "$TEXT"  'TEXT'
+
+eval "$(assert-arg "$COLOR_FN" '-c COLOR')"
+eval "$(assert-arg "$TEXT"     'TEXT')"
 
 
 "$COLOR_FN" "$TEXT"