rootfs.sh: add options to list and get test config

Add new options to rootfs.sh: -l prints the list of all distros,
-t retrieves a subset of the distro configuration from config.sh
for testing purpose.

Signed-off-by: Marco Vedovati <mvedovati@suse.com>

Makefile

@@ -84,6 +84,10 @@ test-image-only:
 test-initrd-only:
 	$(TEST_RUNNER) --test-initrds-only "$(DISTRO)"
 
+.PHONY: list-distros
+list-distros:
+	@ $(ROOTFS_BUILDER) -l
+
 .PHONY: clean
 clean:
 	rm -rf $(DISTRO_ROOTFS_MARKER) $(DISTRO_ROOTFS) $(DISTRO_IMAGE) $(DISTRO_INITRD)

rootfs-builder/rootfs.sh

@@ -54,8 +54,10 @@ Refer the Platform-OS Compatibility Matrix: https://github.com/kata-containers/o
 Options:
 -a  : agent version DEFAULT: ${AGENT_VERSION} ENV: AGENT_VERSION
 -h  : show this help message
+-l  : list the supported Linux distributions
 -o  : specify version of osbuilder
 -r  : rootfs directory DEFAULT: ${ROOTFS_DIR} ENV: ROOTFS_DIR
+-t  : print the test config for a given <distro_name>
 
 ENV VARIABLES:
 GO_AGENT_PKG: Change the golang package url to get the agent source code
@@ -78,6 +80,15 @@ get_distros() {
 	done
 }
 
+get_test_config() {
+	local distro="$1"
+	local config="${script_dir}/${distro}/config.sh"
+	source ${config}
+
+	echo -e "INIT_PROCESS:\t\t$INIT_PROCESS"
+	echo -e "ARCH_EXCLUDE_LIST:\t\t${ARCH_EXCLUDE_LIST[@]}"
+}
+
 check_function_exist()
 {
 	function_name="$1"
@@ -180,13 +191,15 @@ copy_kernel_modules()
 
 OSBUILDER_VERSION="unknown"
 
-while getopts a:ho:r: opt
+while getopts a:hlo:r:t: opt
 do
 	case $opt in
 		a)	AGENT_VERSION="${OPTARG}" ;;
 		h)	usage ;;
+		l)	get_distros | sort && exit 0;;
 		o)	OSBUILDER_VERSION="${OPTARG}" ;;
 		r)	ROOTFS_DIR="${OPTARG}" ;;
+		t)	get_test_config "${OPTARG}" && exit 0;;
 	esac
 done