Make layer inclusion a neutral operation

Classes are and bbappends are reworked so that mere inclusion of
this layer to bbappends.conf doesn't change anything. In addition
class behavior can now be controlled by both inheriting sota.bblcass
and enabling "sota" DISTRO_FEATURE.

4 files changed, 28 insertions, 27 deletions

diff --git a/classes/sota.bbclass b/classes/sota.bbclass
index 0697932..ab9611a 100644
--- a/classes/sota.bbclass
+++ b/classes/sota.bbclass
@@ -1,19 +1,19 @@
-DISTRO_FEATURES_append = " sota"
-OVERRIDES .= ":sota"
+python __anonymous() {
+    if bb.utils.contains('DISTRO_FEATURES', 'sota', True, False, d):
+        d.appendVar("OVERRIDES", ":sota")
+        #d.appendVar("IMAGE_INSTALL", " ostree os-release")
 
-IMAGE_INSTALL_append = " ostree os-release"
+        d.appendVarFlag("do_image_wic", "depends", " %s:do_image_otaimg" % d.getVar("IMAGE_BASENAME", True))
+        #d.appendVar("EXTRA_IMAGEDEPENDS", " parted-native mtools-native dosfstools-native")
+}
 
-# live image for OSTree-enabled systems
-IMAGE_CLASSES += "image_types_ostree image_types_ota"
-IMAGE_FSTYPES += "ostreepush otaimg"
+IMAGE_INSTALL_append_sota = " ostree os-release"
+IMAGE_CLASSES += " image_types_ostree image_types_ota"
+IMAGE_FSTYPES += "${@bb.utils.contains('DISTRO_FEATURES', 'sota', 'ostreepush otaimg wic', ' ', d)}"
 
-# if don't build wic image unless IMAGE_BOOT_FILES is set. Prevents build from failing
-#   on machines that don't support updater yet
-IMAGE_FSTYPES += "${@' wic' if (d.getVar("IMAGE_BOOT_FILES", True)) else ''}"
-WKS_FILE ?= "sdimage-sota.wks"
-do_image_wic[depends] += "${IMAGE_BASENAME}:do_image_otaimg"
+WKS_FILE_sota ?= "sdimage-sota.wks"
 
-EXTRA_IMAGEDEPENDS += " parted-native mtools-native dosfstools-native"
+EXTRA_IMAGEDEPENDS_append_sota = " parted-native mtools-native dosfstools-native"
 
 # Please redefine OSTREE_REPO in order to have a persistent OSTree repo
 OSTREE_REPO ?= "${DEPLOY_DIR_IMAGE}/ostree_repo"
@@ -21,13 +21,11 @@ OSTREE_BRANCHNAME ?= "ota-${MACHINE}"
 OSTREE_OSNAME ?= "poky"
 OSTREE_INITRAMFS_IMAGE ?= "initramfs-ostree-image"
 
-# Prelinking increases the size of downloads and causes build errors
-USER_CLASSES_remove = "image-prelink"
+SOTA_MACHINE ??="none"
+SOTA_MACHINE_raspberrypi2 ?= "raspberrypi"
+SOTA_MACHINE_rarpberrypi3 ?= "raspberrypi"
+SOTA_MACHINE_porter ?= "porter"
+SOTA_MACHINE_intel-corei7-64 ?= "minnowboard"
+SOTA_MACHINE_qemux86-64 ?= "qemux86-64"
 
-SOTA_MACHINE ?= "none"
-SOTA_MACHINE_raspberrypi = "raspberrypi"
-SOTA_MACHINE_raspberrypi3 = "raspberrypi"
-SOTA_MACHINE_porter = "porter"
-SOTA_MACHINE_intel-corei7-64 = "minnowboard"
-SOTA_MACHINE_qemux86-64 = "qemux86-64"
 inherit sota_${SOTA_MACHINE}
diff --git a/classes/sota_minnowboard.bbclass b/classes/sota_minnowboard.bbclass
index 970bd6a..8417348 100644
--- a/classes/sota_minnowboard.bbclass
+++ b/classes/sota_minnowboard.bbclass
@@ -1,7 +1,7 @@
 OSTREE_BOOTLOADER ?= "grub"
-EFI_PROVIDER = "grub-efi"
+EFI_PROVIDER_sota = "grub-efi"
 
-WKS_FILE = "efiimage-sota.wks"
-IMAGE_BOOT_FILES = ""
+WKS_FILE_sota = "efiimage-sota.wks"
+IMAGE_BOOT_FILES_sota = ""
 
 OSTREE_KERNEL_ARGS ?= "ramdisk_size=16384 rw rootfstype=ext4 rootwait rootdelay=2 console=ttyS0,115200 console=tty0"
diff --git a/classes/sota_minnowboard_uboot.inc b/classes/sota_minnowboard_uboot.inc
index 5097e9d..85d6a60 100644
--- a/classes/sota_minnowboard_uboot.inc
+++ b/classes/sota_minnowboard_uboot.inc
@@ -1,8 +1,8 @@
-PREFERRED_PROVIDER_virtual/bootloader = "u-boot-ota"
-UBOOT_MACHINE = "minnowmax_defconfig"
+PREFERRED_PROVIDER_virtual/bootloader_sota ?= "u-boot-ota"
+UBOOT_MACHINE_sota ?= "minnowmax_defconfig"
 
-EXTRA_IMAGEDEPENDS_append = " minnowboard-bootfiles"
-IMAGE_BOOT_FILES = "minnowboard-bootfiles/*"
+EXTRA_IMAGEDEPENDS_append_sota = " minnowboard-bootfiles"
+IMAGE_BOOT_FILES_sota ?= "minnowboard-bootfiles/*"
 
 OSTREE_KERNEL_ARGS ?= "ramdisk_size=16384 rw rootfstype=ext4 rootwait rootdelay=2 ostree_root=/dev/hda console=ttyS0,115200 console=tty0"
 
diff --git a/classes/sota_none.bbclass b/classes/sota_none.bbclass
index dc72a07..86eaf0b 100644
--- a/classes/sota_none.bbclass
+++ b/classes/sota_none.bbclass
@@ -1 +1,4 @@
 # null machine it's here to make bitbake happy when SOTA_MACHINE is undefined
+python __anonymous() {
+        bb.warn("SOTA functionality is not yet supported for your machine")
+}