build.sh: add repo meta information to kbuild build version

If this was built out of a repo tree (which is usually the case for the prebuilt kernel images), compute KBUILD_BUILD_VERSION out of repo's current manifest branch. This creates an entry that can be inspected by `uname -v` at runtime or can be derived from the kernel binary: $ zgrep -a 'Linux version' Image.gz Linux version 5.4.0 .... #1 repo:common-android-mainline SMP PREEMPT .. Bug: 143359504 Change-Id: Ib6c2ce1f96e9a4003a74d448751750d61e97d584 Signed-off-by: Matthias Maennich <[email protected]>
MiCode · Oct 28, 2019 · c3c82f0 · c3c82f0
1 parent 5e39cad
commit c3c82f0
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/_setup_env.sh b/_setup_env.sh
@@ -32,6 +32,13 @@ export COMMON_OUT_DIR=$(readlink -m ${OUT_DIR:-${ROOT_DIR}/out/${BRANCH}})
 export OUT_DIR=$(readlink -m ${COMMON_OUT_DIR}/${KERNEL_DIR})
 export DIST_DIR=$(readlink -m ${DIST_DIR:-${COMMON_OUT_DIR}/dist})
 
+if which repo > /dev/null; then
+  # extract the repo branch name (e.g. common-android-mainline)
+  repo_branch=$(repo --color=never info -o | grep -E "Manifest merge branch" |
+                                             sed "s|.*refs/heads/\(.*\)|\1|")
+  export KBUILD_BUILD_VERSION="1 repo:$repo_branch"
+fi
+
 echo "========================================================"
 echo "= build config: ${ROOT_DIR}/${BUILD_CONFIG}"
 cat ${ROOT_DIR}/${BUILD_CONFIG}