Remove Java version checks (#429)

deb/build/debian/jenkins.init

@@ -33,22 +33,6 @@ check_arguments() {
 		return 2
 	fi
 
-	# Work out the JAVA version we are working with:
-	JAVA_VERSION=$("${JAVA}" -version 2>&1 | sed -n ';s/.* version "\([0-9]\{2,\}\|[0-9]\.[0-9]\)\..*".*/\1/p;')
-	if [ "${JAVA_VERSION}" = "21" ]; then
-		echo "Correct java version found" >&2
-	elif [ "${JAVA_VERSION}" = "17" ]; then
-		echo "Correct java version found" >&2
-	elif [ "${JAVA_VERSION}" = "11" ]; then
-		echo "Correct java version found" >&2
-	else
-		echo "Found an incorrect Java version" >&2
-		echo "Java version found:" >&2
-		"${JAVA}" -version >&2
-		echo "Aborting" >&2
-		return 2
-	fi
-
 	# Make sure we run as root, since setting the max open files through
 	# ulimit requires root access
 	if [ "$(id -u)" -gt 0 ]; then

systemd/jenkins.sh

@@ -33,21 +33,6 @@ infer_java_cmd() {
 	JENKINS_JAVA_CMD="$(command -v java)" || return "$?"
 }
 
-check_java_version() {
-	printf '%s' "${JENKINS_OPTS}" | grep -q '\--enable-future-java' && return 0
-
-	java_version=$("${JENKINS_JAVA_CMD}" -version 2>&1 |
-		sed -n ';s/.* version "\([0-9]\{2,\}\|[0-9]\.[0-9]\)\..*".*/\1/p;')
-
-	if [ -z "${java_version}" ]; then
-		return 1
-	elif [ "${java_version}" != "21" ] && [ "${java_version}" != "17" ] && [ "${java_version}" != "11" ]; then
-		return 1
-	else
-		return 0
-	fi
-}
-
 infer_jenkins_opts() {
 	inferred_jenkins_opts=""
 
@@ -120,9 +105,6 @@ main() {
 
 	infer_jenkins_opts
 
-	check_java_version ||
-		die "invalid Java version: $("${JENKINS_JAVA_CMD}" -version 2>&1)"
-
 	java_opts_tmp="${JAVA_OPTS}"
 	unset JAVA_OPTS
 	unset JENKINS_DEBUG_LEVEL