[OE-core] [PATCH 02/18] kernel-yocto: move SRCREV validation to patching phase

[Richard Purdie]

On Sat, 2014-08-30 at 00:38 -0400, Bruce Ashfield wrote:
> Rather than attempting to condition the entire tree to machine SRCREV (since
> we don't know what branch will be built), we can instead wait until patching
> has completed and then confirm that we are indeed building a decendant of the
> specified SRCREV. The result is a much simpler check, and no mangling of the
> tree.
> 
> Signed-off-by: Bruce Ashfield <bruce.ashfield at windriver.com>
> ---
>  meta/classes/kernel-yocto.bbclass | 39 +++++++++++++++++++++++----------------
>  1 file changed, 23 insertions(+), 16 deletions(-)

Looks like some versions of git on the AB cluster don't support this. Do
we need to bump the minimum git version and install buildtools-tarball
on the affected machines? Or can we use some other construct here?

https://autobuilder.yoctoproject.org/main/builders/nightly-x86-64/builds/24/steps/BuildImages/logs/stdio

Cheers,

Richard


> diff --git a/meta/classes/kernel-yocto.bbclass b/meta/classes/kernel-yocto.bbclass
> index 38c886b21b09..4938712c7cff 100644
> --- a/meta/classes/kernel-yocto.bbclass
> +++ b/meta/classes/kernel-yocto.bbclass
> @@ -71,6 +71,7 @@ do_patch() {
>  	fi
>  
>  	machine_branch="${@ get_machine_branch(d, "${KBRANCH}" )}"
> +	machine_srcrev="${SRCREV_machine}"
>  
>  	# if we have a defined/set meta branch we should not be generating
>  	# any meta data. The passed branch has what we need.
> @@ -122,6 +123,17 @@ do_patch() {
>  		exit 1
>  	fi
>  
> +	# see if the branch we are about to patch has been properly reset to the defined
> +	# SRCREV .. if not, we reset it.
> +	branch_head=`git rev-parse HEAD`
> +	if [ "${machine_srcrev}" != "AUTOINC" ]; then
> +	 	if [ "${machine_srcrev}" != "${branch_head}" ]; then
> +			current_branch=`git rev-parse --abbrev-ref HEAD`
> +			git branch "$current_branch-orig"
> +			git reset --hard ${machine_srcrev}
> +		fi
> +	fi
> +
>  	# executes and modifies the source tree as required
>  	patchme ${KMACHINE}
>  	if [ $? -ne 0 ]; then
> @@ -130,6 +142,17 @@ do_patch() {
>  		exit 1
>  	fi
>  
> +	# check to see if the specified SRCREV is reachable from the final branch.
> +	# if it wasn't something wrong has happened, and we should error.
> +	if [ "${machine_srcrev}" != "AUTOINC" ]; then
> +		git merge-base --is-ancestor ${machine_srcrev} HEAD
> +	 	if [ $? -ne 0 ]; then
> +			bbnote "ERROR: SRCREV ${machine_srcrev} was specified, but is not reachable"
> +			bbnote "       Check the BSP description for incorrect branch selection, or other errors."
> +			exit 1
> +		fi
> +	fi
> +
>  	# Perform a final check. If something other than the default kernel
>  	# branch was requested, and that's not where we ended up, then we 
>  	# should thrown an error, since we aren't building what was expected
> @@ -335,22 +358,6 @@ do_validate_branches() {
>  		exit 1
>  	fi
>  
> -	# force the SRCREV in each branch that contains the specified
> -	# SRCREV (if it isn't the current HEAD of that branch)
> -	git checkout -q master
> -	for b in $containing_branches; do
> -		branch_head=`git show-ref -s --heads ${b}`		
> -		if [ "$branch_head" != "$machine_srcrev" ]; then
> -			echo "[INFO] Setting branch $b to ${machine_srcrev}"
> -			if [ "$b" = "master" ]; then
> -				git reset --hard $machine_srcrev > /dev/null
> -			else
> -				git branch -D $b > /dev/null
> -				git branch $b $machine_srcrev > /dev/null
> -			fi
> -		fi
> -	done
> -
>  	## KMETA branch validation.
>  	## We do validation if the meta branch exists, and AUTOREV hasn't been set
>   	meta_head=`git show-ref -s --heads ${KMETA}`