[OE-core] [PATCH 6/8] image-vm.bbclass: support specifying an initramfs

[Patrick Ohly]

Set INITRD_IMAGE to automatically add a custom initramfs to the boot
partition.

Signed-off-by: Patrick Ohly <patrick.ohly at intel.com>
---
 meta/classes/image-vm.bbclass | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/meta/classes/image-vm.bbclass b/meta/classes/image-vm.bbclass
index 3df2c36..0632667 100644
--- a/meta/classes/image-vm.bbclass
+++ b/meta/classes/image-vm.bbclass
@@ -3,6 +3,11 @@ SYSLINUX_PROMPT ?= "0"
 SYSLINUX_LABELS = "boot"
 LABELS_append = " ${SYSLINUX_LABELS} "
 
+# Using an initramfs is optional. Enable it by setting INITRD_IMAGE.
+INITRD_IMAGE ?= ""
+INITRD ?= "${@'${DEPLOY_DIR_IMAGE}/${INITRD_IMAGE}-${MACHINE}.cpio.gz' if '${INITRD_IMAGE}' else ''}"
+do_bootdirectdisk[depends] += "${@'${INITRD_IMAGE}:do_rootfs' if '${INITRD_IMAGE}' else ''}"
+
 # need to define the dependency and the ROOTFS for directdisk
 do_bootdirectdisk[depends] += "${PN}:do_rootfs"
 ROOTFS ?= "${DEPLOY_DIR_IMAGE}/${IMAGE_BASENAME}-${MACHINE}.ext4"
-- 
2.1.4