[PATCH v2] image.bbclass: allow overriding dependency on virtual/kernel:do_deploy

[Dmitry Baryshkov <dmitry.baryshkov@linaro.org>]

From: Dmitry Baryshkov <dbaryshkov@gmail.com>

Since the commit fe26b2379ecd ("image.bbclass: Depend on
virtual/kernel:do_deploy"), the image.bbclass made building images
depend on virtual/kernel. For some images, including small initramfs,
this is not the case. Allow overriding this dependency in case
developers knows what they are doing.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---

Changes since v1:
 - Use the same variable in both lines
 - Change the var name to KERNEL_DEPLOY_DEPEND as suggested in the
   revert message.

---
 meta/classes/image.bbclass | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/meta/classes/image.bbclass b/meta/classes/image.bbclass
index 7f1f6f80a464..c4051961c030 100644
--- a/meta/classes/image.bbclass
+++ b/meta/classes/image.bbclass
@@ -132,7 +132,12 @@ def rootfs_variables(d):
 
 do_rootfs[vardeps] += "${@rootfs_variables(d)}"
 
-do_build[depends] += "virtual/kernel:do_deploy"
+# This is needed to have kernel image in DEPLOY_DIR.
+# This follow many common usecases and user expectations.
+# But if you are building an image which doesn't need the kernel image at all,
+# you can unset this variable manually.
+KERNEL_DEPLOY_DEPEND ?= "virtual/kernel:do_deploy"
+do_build[depends] += "${KERNEL_DEPLOY_DEPEND}"
 
 
 python () {
-- 
2.30.2