[PATCH 2/4 v2] image: Add do_rootfs template to image class

[Alexander Smirnov <asmirnov@ilbers.de>]

Add 'do_rootfs' task template to the image class due to it's
mandatory task. Moreover image class already has deps from
'do_rootfs' what makes it inconsistent for now.

Also this patch removes trailing empty line.

Signed-off-by: Alexander Smirnov <asmirnov@ilbers.de>
---
 meta-isar/recipes-core/images/isar-image-base.bb | 3 ---
 meta/classes/image.bbclass                       | 8 ++++++++
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/meta-isar/recipes-core/images/isar-image-base.bb b/meta-isar/recipes-core/images/isar-image-base.bb
index c2150b1..ad776ed 100644
--- a/meta-isar/recipes-core/images/isar-image-base.bb
+++ b/meta-isar/recipes-core/images/isar-image-base.bb
@@ -26,7 +26,6 @@ IMAGE_PREINSTALL += "apt \
 
 WORKDIR = "${TMPDIR}/work/${DISTRO}-${DISTRO_ARCH}/${PN}"
 
-do_rootfs[stamp-extra-info] = "${MACHINE}-${DISTRO}"
 do_rootfs[dirs] = "${WORKDIR}/hooks_multistrap"
 
 do_rootfs() {
@@ -70,5 +69,3 @@ do_rootfs() {
     sudo rm "${IMAGE_ROOTFS}/${DISTRO_CONFIG_SCRIPT}"
     _do_rootfs_cleanup
 }
-
-addtask rootfs before do_build after do_populate
diff --git a/meta/classes/image.bbclass b/meta/classes/image.bbclass
index 2c2bafc..7813b16 100644
--- a/meta/classes/image.bbclass
+++ b/meta/classes/image.bbclass
@@ -84,6 +84,14 @@ do_populate() {
 addtask populate before do_build after do_unpack
 do_populate[deptask] = "do_deploy_deb"
 
+do_rootfs[stamp-extra-info] = "${MACHINE}-${DISTRO}"
+
+do_rootfs() {
+    die "No root filesystem function defined, please implement in your recipe"
+}
+
+addtask rootfs before do_build after do_populate
+
 do_copy_boot_files() {
     KERNEL_IMAGE=${@get_image_name(d, 'vmlinuz')}
     if [ -n "${KERNEL_IMAGE}" ]; then
-- 
2.9.5