image.bbclass: IMAGE_VARS->IMAGE_BOOT, make overridable

IMAGE_VARS usage forces images to have init, dev management, login
management and other stuff. In cases where you don't need any of those
(like initramfs images or other special-purpose images) you need to
override 4 variables in order to get clean image that only installs
things from IMAGE_INSTALL.

So, this changes IMAGE_VARS to more meaningful IMAGE_BOOT and makes it
possible to build images without boot components with single
IMAGE_BOOT="".
Acked-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Koen Kooi <koen@openembedded.org>

diff --git a/classes/image.bbclass b/classes/image.bbclass
index 3a0bc32..cbbbbd1 100644 (file)
--- a/classes/image.bbclass
+++ b/classes/image.bbclass
@@ -17,16 +17,16 @@ IMAGE_INITSCRIPTS ?= "initscripts"
 #
 IMAGE_LOGIN_MANAGER ?= "tinylogin"
 
-IMAGE_VARS = "${IMAGE_INITSCRIPTS} \
+IMAGE_BOOT ?= "${IMAGE_INITSCRIPTS} \
 ${IMAGE_DEV_MANAGER} \
 ${IMAGE_INIT_MANAGER} \
 ${IMAGE_LOGIN_MANAGER} "
 
-RDEPENDS += "${IMAGE_INSTALL} ${IMAGE_VARS}"
+RDEPENDS += "${IMAGE_INSTALL} ${IMAGE_BOOT}"
 
 # "export IMAGE_BASENAME" not supported at this time
 IMAGE_BASENAME[export] = "1"
-export PACKAGE_INSTALL ?= "${IMAGE_INSTALL} ${IMAGE_VARS}"
+export PACKAGE_INSTALL ?= "${IMAGE_INSTALL} ${IMAGE_BOOT}"
 
 # We need to recursively follow RDEPENDS and RRECOMMENDS for images
 do_rootfs[recrdeptask] += "do_deploy do_populate_staging"