@@ -6,14 +6,14 @@ set -eo pipefail

 # debian                           latest              f6fab3b798be        10 weeks ago        85.1 MB

 # debian                           latest              f6fab3b798be3174f45aa1eb731f8182705555f89c9026d8c1ef230cbf8301dd   10 weeks ago        85.1 MB

-if ! command -v curl &> /dev/null; then

-	echo >&2 'error: "curl" not found!'

-	exit 1

-fi

-if ! command -v jq &> /dev/null; then

-	echo >&2 'error: "jq" not found!'

-	exit 1

-fi

+

+# check if essential commands are in our PATH

+for cmd in curl jq go; do

+	if ! command -v $cmd &> /dev/null; then

+		echo >&2 "error: \"$cmd\" not found!"

+		exit 1

+	fi

+done

 usage() {

 	echo "usage: $0 dir image[:tag][@digest] ..."