board/common: generate version info similar to Infix

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

Author: troglobit

board/common/post-build.sh

@@ -9,16 +9,8 @@ done
 # because by default container runtimes manage all networking.
 rm "${TARGET_DIR}/etc/network/interfaces"
 
-if [ -z "$GIT_VERSION" ]; then
-    GIT_VERSION=$(git -C "$BR2_EXTERNAL_CURIOS_PATH" describe --always --dirty --tags)
-fi
-
-# Override VERSION in /etc/os-release and filenames for release builds
-if [ -n "$RELEASE" ]; then
-    VERSION="$RELEASE"
-else
-    VERSION=$GIT_VERSION
-fi
+VERSION="${CURIOS_VERSION}"
+GIT_VERSION="${CURIOS_BUILD_ID}"
 
 # Buildroot original remain in /usr/lib/os-release
 rm "${TARGET_DIR}/etc/os-release"

external.mk

@@ -1,5 +1,8 @@
 include $(sort $(wildcard $(BR2_EXTERNAL_CURIOS_PATH)/package/*/*.mk))
 
+export CURIOS_BUILD_ID ?= $(shell git -C $(BR2_EXTERNAL_CURIOS_PATH) describe --dirty --always --tags)
+export CURIOS_VERSION   = $(if $(RELEASE),$(RELEASE),$(CURIOS_BUILD_ID))
+
 .PHONY: upload
 upload: all
 	(cd $O/images; skopeo copy oci:rootfs-oci:edge docker://ghcr.io/kernelkit/curios:edge)