[RFC PATCH v2 3/5] rootfs: Allow to overwrite the initramfs generation cmds

["'Quirin Gylstorff' via isar-users" <isar-users@googlegroups.com>]

From: Quirin Gylstorff <quirin.gylstorff@siemens.com>

This is in preparation to support additional initramfs generators
like dracut.

Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
---
 meta/classes/rootfs.bbclass | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/meta/classes/rootfs.bbclass b/meta/classes/rootfs.bbclass
index 7b7859b9..70758cce 100644
--- a/meta/classes/rootfs.bbclass
+++ b/meta/classes/rootfs.bbclass
@@ -5,7 +5,20 @@ inherit deb-dl-dir
 
 ROOTFS_ARCH ?= "${DISTRO_ARCH}"
 ROOTFS_DISTRO ?= "${DISTRO}"
+
+def initramfs_generator_cmd(d):
+    cmdline =  d.getVar('ROOTFS_INITRAMFS_GENERATOR_CMDLINE') or ''
+    cmd = cmdline.split()
+    if len(cmd):
+        return cmd[0]
+    return ''
+
+def initramfs_generator_cmdline(d):
+    return "update-initramfs -u -v -k \"$kernel_version\""
+
 ROOTFS_PACKAGES ?= ""
+ROOTFS_INITRAMFS_GENERATOR_CMD ?= "${@ initramfs_generator_cmd(d)}"
+ROOTFS_INITRAMFS_GENERATOR_CMDLINE ?= "${@ initramfs_generator_cmdline(d)}"
 ROOTFS_BASE_DISTRO ?= "${BASE_DISTRO}"
 
 # Features of the rootfs creation:
@@ -183,7 +196,7 @@ rootfs_disable_initrd_generation[weight] = "1"
 rootfs_disable_initrd_generation() {
     # fully disable initrd generation
     sudo mkdir -p "${ROOTFSDIR}${ROOTFS_STUBS_DIR}"
-    sudo cp -a ${ROOTFSDIR}/usr/bin/true ${ROOTFSDIR}${ROOTFS_STUBS_DIR}/update-initramfs
+    sudo cp -a ${ROOTFSDIR}/usr/bin/true ${ROOTFSDIR}${ROOTFS_STUBS_DIR}/${ROOTFS_INITRAMFS_GENERATOR_CMD}
 }
 
 ROOTFS_INSTALL_COMMAND += "rootfs_install_pkgs_update"
@@ -485,11 +498,12 @@ rootfs_generate_initramfs() {
             export kernel_version=$(basename /boot/vmlinu[xz]-* | cut -d'-' -f2-); \
             echo "Total number of modules: $mods_total"; \
             echo "Generating initrd for kernel version: $kernel_version"; \
-            update-initramfs -u -v -k "$kernel_version";'
+            ${ROOTFS_INITRAMFS_GENERATOR_CMDLINE};'
         if [ -n "${INITRD_DEPLOY_FILE}" ]; then
             if [ -f "${ROOTFSDIR}/initrd.img" ]; then
                 # debian (mkinitramfs)
-                cp ${ROOTFSDIR}/initrd.img ${DEPLOYDIR}/${INITRD_DEPLOY_FILE}
+                sudo cp ${ROOTFSDIR}/initrd.img ${DEPLOYDIR}/${INITRD_DEPLOY_FILE}
+                sudo chown $(id -u):$(id -g) ${DEPLOYDIR}/${INITRD_DEPLOY_FILE}
             else
                 # ubuntu (dracut)
                 cp ${ROOTFSDIR}/boot/initrd.img ${DEPLOYDIR}/${INITRD_DEPLOY_FILE}
-- 
2.50.1

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