[yocto] Triggering a rebuild when file deployed from other recipe changes

[Kristupas Savickas]

Hello,

I have a recipe that packages images from ${DEPLOY_DIR_IMAGE} into a 
final binary that can be installed by the user. It looks something like 
this:

do_compile[depends] += "virtual/rootfs-image:do_image_complete"
do_compile[depends] += "virtual/boot-image:do_deploy"
do_compile[depends] += "virtual/bootloader:do_deploy"

do_compile() {
     zip -j --compression-method=store \
         ${B}/${IMAGE_VERSION_STR}.bin \
         ${DEPLOY_DIR_IMAGE}/${ROOTFS_IMAGE_FULLNAME} \
         ${DEPLOY_DIR_IMAGE}/${BOOT_IMAGE_FULLNAME} \
         ${DEPLOY_DIR_IMAGE}/${ABOOT_IMAGE_FULLNAME}
}

Is there a way to trigger a rebuild of this package if any other package 
it depends on rebuilds? I guess I need to do something with sstate, but 
I'm not sure what mechanism I'm supposed to follow (or am I off the 
beaten track?).

-- 
Pagarbiai,
Linux programuotojas
Kristupas Savickas
+370 633 36795