classes/recipes: Switch to use inherit_defer

Now that bitbake supports the use of inherit_defer, switch all conditional
(variable based) inherits to use this instead. This leads to more a more
deterministic user experience since there is no longer an immediate expansion
and later changes to the variables in question (e.g. a bbappend) are
accounted for.

This patch tries to ensure the behaviour before/after remains as unchanged
as it reasonably can, e.g. by always inherting populate_sdk_base. native
and nativesdk continue to need to be inherited last, hence being used
with inherit_defer in a handful of very specific cases.

(From OE-Core rev: 451363438d38bd4552d5bcec4a92332f5819a5d4)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/meta/classes-recipe/image.bbclass b/meta/classes-recipe/image.bbclass
index 6bdddc0134..28be6c6362 100644
--- a/meta/classes-recipe/image.bbclass
+++ b/meta/classes-recipe/image.bbclass
@@ -14,14 +14,15 @@ ROOTFS_BOOTSTRAP_INSTALL = "run-postinsts"
 IMGCLASSES = "rootfs_${IMAGE_PKGTYPE} image_types ${IMAGE_CLASSES}"
 # Only Linux SDKs support populate_sdk_ext, fall back to populate_sdk_base
 # in the non-Linux SDK_OS case, such as mingw32
-IMGCLASSES += "${@['populate_sdk_base', 'populate_sdk_ext']['linux' in d.getVar("SDK_OS")]}"
+inherit populate_sdk_base
+IMGCLASSES += "${@['', 'populate_sdk_ext']['linux' in d.getVar("SDK_OS")]}"
 IMGCLASSES += "${@bb.utils.contains_any('IMAGE_FSTYPES', 'live iso hddimg', 'image-live', '', d)}"
 IMGCLASSES += "${@bb.utils.contains('IMAGE_FSTYPES', 'container', 'image-container', '', d)}"
 IMGCLASSES += "image_types_wic"
 IMGCLASSES += "rootfs-postcommands"
 IMGCLASSES += "image-postinst-intercepts"
 IMGCLASSES += "overlayfs-etc"
-inherit ${IMGCLASSES}
+inherit_defer ${IMGCLASSES}
 
 TOOLCHAIN_TARGET_TASK += "${PACKAGE_INSTALL}"
 TOOLCHAIN_TARGET_TASK_ATTEMPTONLY += "${PACKAGE_INSTALL_ATTEMPTONLY}"