templates: Support extracting only either common or target device blobs

Change-Id: I33e8c4b79985912199b9776529a32a8a5d7a5aef

templates/multi-device/common/extract-files.sh

@@ -24,11 +24,19 @@ source "${HELPER}"
 # Default to sanitizing the vendor folder before extraction
 CLEAN_VENDOR=true
 
+ONLY_COMMON=
+ONLY_TARGET=
 KANG=
 SECTION=
 
 while [ "${#}" -gt 0 ]; do
     case "${1}" in
+        --only-common )
+                ONLY_COMMON=true
+                ;;
+        --only-target )
+                ONLY_TARGET=true
+                ;;
         -n | --no-cleanup )
                 CLEAN_VENDOR=false
                 ;;
@@ -61,12 +69,14 @@ function blob_fixup() {
     esac
 }
 
+if [ -z "${ONLY_TARGET}" ]; then
     # Initialize the helper for common device
     setup_vendor "${DEVICE_COMMON}" "${VENDOR}" "${ANDROID_ROOT}" true "${CLEAN_VENDOR}"
 
     extract "${MY_DIR}/proprietary-files.txt" "${SRC}" "${KANG}" --section "${SECTION}"
+fi
 
-if [ -s "${MY_DIR}/../${DEVICE}/proprietary-files.txt" ]; then
+if [ -z "${ONLY_COMMON}" ] && [ -s "${MY_DIR}/../${DEVICE}/proprietary-files.txt" ]; then
     # Reinitialize the helper for device
     source "${MY_DIR}/../${DEVICE}/extract-files.sh"
     setup_vendor "${DEVICE}" "${VENDOR}" "${ANDROID_ROOT}" false "${CLEAN_VENDOR}"