kernel_update: do not install kernel if it is not installed (for ovz containers)

bin/epm-kernel_update

@@ -23,6 +23,11 @@ epm_kernel_update()
 
 	case $DISTRNAME in
 	ALTLinux)
+		load_helper epm-query_package
+		if ! __epm_query_package kernel-image >/dev/null ; then
+			info "No installed kernel packages, skipping update"
+			return
+		fi
 		assure_exists update-kernel
 		sudocmd update-kernel $pkg_filenames
 		return ;;

bin/epm-query_package

@@ -20,6 +20,11 @@
 load_helper epm-packages
 load_helper epm-search
 
+__epm_query_package()
+{
+	pkg_filenames="$@" quoted_args="$@" quiet=1 epm_query_package
+}
+
 epm_query_package()
 {
 	[ -n "$pkg_filenames" ] || fatal "Please, use search with some argument or run epmqa for get all packages."