introduce '--init' option

Use it to precompile all the dependencies for the dnbd3-rootfs module.

Assuming the current packer/ansible workflow that generates base images
once and use these for provisioning runs, precompiling the dependencies
of the dnbd3-rootfs module in the base image would avoid to compile
these in every provisioning run. This will speed up the process.

1 files changed, 59 insertions, 0 deletions

diff --git a/builder/build-initramfs.sh b/builder/build-initramfs.sh
index 47171ff4..2addea63 100755
--- a/builder/build-initramfs.sh
+++ b/builder/build-initramfs.sh
@@ -327,10 +327,15 @@ parse_command_line() {
                 fi
                 shift
                 ;;
+            -i|--init)
+                shift
+                initialize='yes'
+                ;;
             -)
                 shift
                 while [[ "$1" =~ ^.+$ ]]; do
                     dracut_parameter+=("$1")
+                    [ "$1" == "--kver" ] && kernel_version="$2"
                     shift
                 done
                 ;;
@@ -431,6 +436,57 @@ initialize_dracut() {
         "${_root_dir}/dracut/dracut-install"
     return $?
 }
+initialize_dnbd3_rootfs_module() {
+	# shellcheck disable=SC2016,SC2034
+	local __doc__='
+	Initialize dependency of dnbd3-rootfs modules:
+	xmount, qemu-xmount, dnbd3
+
+	Example:
+
+	`initialize_dnbd3_rootfs_module`
+	'
+	core.import "${_root_dir}/modules.d/dnbd3-rootfs/scripts/build.sh"
+        # We might want to move the "binaries" repos from the dnbd3-rootfs module to main repo one day...
+        _deps_base_dir="${_root_dir}/modules.d/dnbd3-rootfs/binaries"
+        if [[ ! -f "${_deps_base_dir}/xmount/trunk/build/src/xmount" ]]; then
+            logging.info "Could not find xmount binary, building it..."
+            if ! build_compile_xmount "${_deps_base_dir}/xmount/"; then
+                logging.error "Failed to build xmount binary."
+                return 1
+            fi
+        fi
+        if [[ ! -f "${_deps_base_dir}/qemu-xmount/libxmount_input_qemu.so" ]]; then
+            logging.info "Could not find xmount qemu library, building it..."
+            if ! build_compile_qemu_xmount "${_deps_base_dir}/qemu-xmount/"; then
+                logging error "Failed to build xmount qemu library."
+                return 1
+            fi
+        fi
+        if [[ ! -f "${_deps_base_dir}/dnbd3/build/dnbd3.ko" ]] || \
+            [[ ! -f "${_deps_base_dir}/dnbd3/build/dnbd3-client" ]]; then
+            logging.info "Could not find dnbd3, building it..."
+            # fallback to running kernel if the kernel version was not
+            # specified as the dracut argument '--kver'
+            [ -z "$kernel_version" ] && kernel_version="$(uname -r)"
+            if ! CMAKE_FLAGS="-DKERNEL_VERSION=${kernel_version}" \
+                build_compile_dnbd3 "${_deps_base_dir}/dnbd3/"; then
+                logging.error "Failed to build dnbd3."
+                return 1
+            fi
+
+        fi
+        if [[ ! -f "${_deps_base_dir}/systemd-preserve-process-marker/systemd-preserve-process-marker" ]]; then
+            logging.info "Could not find systemd-preserve-process-marker binary, building it ..."
+            if ! build_compile_systemd_preserve_process_marker \
+                "${_deps_base_dir}/systemd-preserve-process-marker/"; then
+                logging.error "Failed to build systemd-preserve-process-marker"
+                return 1
+            fi
+	fi
+	logging.info "Compilation of dnbd3-rootfs dependencies succeeded."
+	return 0
+}
 cleanup() {
     # shellcheck disable=SC2016,SC2034
     local __doc__='
@@ -605,6 +661,9 @@ main() {
     elif [[ "$cleanup" == 'yes' ]]; then
         logging.info 'Removing distribution specific files.'
         cleanup
+    elif [[ "$initialize" == 'yes' ]]; then
+	logging.info 'Prepare dnbd3-rootfs module dependencies.'
+	initialize_dnbd3_rootfs_module
     else
         logging.info 'Build initramfs.'
         # NOTE: We deactivate our exception handle since dracut returns "1" if