[gnome-continuous-yocto/gnomeostree-3.28-rocko: 2544/8267] kernel.bbclass: Add kernel_version_sanity_check function

[Emmanuele Bassi <ebassi src gnome org>]

commit 0eacf03de18b7eeb3460a4d102dd5932cd73cd06
Author: California Sullivan <california l sullivan intel com>
Date:   Fri Sep 16 16:48:24 2016 -0700

    kernel.bbclass: Add kernel_version_sanity_check function
    
    The kernel being built should match what the recipe claims it is
    building. This function ensures that happens by comparing the version
    information in the kernel's Makefile to the PV the recipe is using.
    
    v2 changes:
    * Match against PV instead of LINUX_VERSION
    * Match against EXTRAVERSION as well (e.g., -rc4)
    * Cleaned up version string building
    
    Fixes [YOCTO #6767].
    
    (From OE-Core rev: ec467cfaea5c8cf22c61daa8845c2e4e96449512)
    
    Signed-off-by: California Sullivan <california l sullivan intel com>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 meta/classes/kernel.bbclass               |   30 +++++++++++++++++++++++++++++
 meta/recipes-kernel/linux/linux-yocto.inc |    1 +
 2 files changed, 31 insertions(+), 0 deletions(-)
---
diff --git a/meta/classes/kernel.bbclass b/meta/classes/kernel.bbclass
index bfb7350..25a153c 100644
--- a/meta/classes/kernel.bbclass
+++ b/meta/classes/kernel.bbclass
@@ -327,6 +327,36 @@ kernel_do_install() {
 }
 do_install[prefuncs] += "package_get_auto_pr"
 
+# Must be ran no earlier than after do_kernel_checkout or else Makefile won't be in ${S}/Makefile
+do_kernel_version_sanity_check() {
+       # The Makefile determines the kernel version shown at runtime
+       # Don't use KERNEL_VERSION because the headers it grabs the version from aren't generated until 
do_compile
+       VERSION=$(grep "^VERSION =" ${S}/Makefile | sed s/.*=\ *//)
+       PATCHLEVEL=$(grep "^PATCHLEVEL =" ${S}/Makefile | sed s/.*=\ *//)
+       SUBLEVEL=$(grep "^SUBLEVEL =" ${S}/Makefile | sed s/.*=\ *//)
+       EXTRAVERSION=$(grep "^EXTRAVERSION =" ${S}/Makefile | sed s/.*=\ *//)
+
+       # Build a string for regex and a plain version string
+       reg="^${VERSION}\.${PATCHLEVEL}"
+       vers="${VERSION}.${PATCHLEVEL}"
+       if [ -n "${SUBLEVEL}" ]; then
+               # Ignoring a SUBLEVEL of zero is fine
+               if [ "${SUBLEVEL}" = "0" ]; then
+                       reg="${reg}(\.${SUBLEVEL})?"
+               else
+                       reg="${reg}\.${SUBLEVEL}"
+                       vers="${vers}.${SUBLEVEL}"
+               fi
+       fi
+       vers="${vers}${EXTRAVERSION}"
+       reg="${reg}${EXTRAVERSION}"
+
+       if [ -z `echo ${PV} | grep -E "${reg}"` ]; then
+               bbfatal "Package Version (${PV}) does not match of kernel being built (${vers}). Please 
update the PV variable to match the kernel source."
+       fi
+       exit 0
+}
+
 addtask shared_workdir after do_compile before do_compile_kernelmodules
 addtask shared_workdir_setscene
 
diff --git a/meta/recipes-kernel/linux/linux-yocto.inc b/meta/recipes-kernel/linux/linux-yocto.inc
index 98a48ec..d979662 100644
--- a/meta/recipes-kernel/linux/linux-yocto.inc
+++ b/meta/recipes-kernel/linux/linux-yocto.inc
@@ -55,6 +55,7 @@ do_install_append(){
 }
 
 # extra tasks
+addtask kernel_version_sanity_check after do_kernel_checkout before do_compile
 addtask kernel_link_images after do_compile before do_install
 addtask validate_branches before do_patch after do_kernel_checkout
 addtask kernel_configcheck after do_configure before do_compile