Merge "Do not fail if unzip found no files to extract"
diff --git a/core/Makefile b/core/Makefile
index 7feec37..6926b26 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -161,295 +161,6 @@
 
 $(call dist-for-goals,sdk,$(API_FINGERPRINT))
 
-# -----------------------------------------------------------------
-# property_overrides_split_enabled
-property_overrides_split_enabled :=
-ifeq ($(BOARD_PROPERTY_OVERRIDES_SPLIT_ENABLED), true)
-  property_overrides_split_enabled := true
-endif
-
-# -----------------------------------------------------------------
-# FINAL_VENDOR_DEFAULT_PROPERTIES will be installed in vendor/build.prop if
-# property_overrides_split_enabled is true. Otherwise it will be installed in
-# /system/build.prop
-ifdef BOARD_VNDK_VERSION
-  ifeq ($(BOARD_VNDK_VERSION),current)
-    FINAL_VENDOR_DEFAULT_PROPERTIES := ro.vndk.version=$(PLATFORM_VNDK_VERSION)
-  else
-    FINAL_VENDOR_DEFAULT_PROPERTIES := ro.vndk.version=$(BOARD_VNDK_VERSION)
-  endif
-  ifdef BOARD_VNDK_RUNTIME_DISABLE
-    FINAL_VENDOR_DEFAULT_PROPERTIES += ro.vndk.lite=true
-  endif
-else
-  FINAL_VENDOR_DEFAULT_PROPERTIES := ro.vndk.version=$(PLATFORM_VNDK_VERSION)
-  FINAL_VENDOR_DEFAULT_PROPERTIES += ro.vndk.lite=true
-endif
-FINAL_VENDOR_DEFAULT_PROPERTIES += \
-    $(call collapse-pairs, $(PRODUCT_DEFAULT_PROPERTY_OVERRIDES))
-
-# Add cpu properties for bionic and ART.
-FINAL_VENDOR_DEFAULT_PROPERTIES += ro.bionic.arch=$(TARGET_ARCH)
-FINAL_VENDOR_DEFAULT_PROPERTIES += ro.bionic.cpu_variant=$(TARGET_CPU_VARIANT_RUNTIME)
-FINAL_VENDOR_DEFAULT_PROPERTIES += ro.bionic.2nd_arch=$(TARGET_2ND_ARCH)
-FINAL_VENDOR_DEFAULT_PROPERTIES += ro.bionic.2nd_cpu_variant=$(TARGET_2ND_CPU_VARIANT_RUNTIME)
-
-FINAL_VENDOR_DEFAULT_PROPERTIES += persist.sys.dalvik.vm.lib.2=libart.so
-FINAL_VENDOR_DEFAULT_PROPERTIES += dalvik.vm.isa.$(TARGET_ARCH).variant=$(DEX2OAT_TARGET_CPU_VARIANT_RUNTIME)
-ifneq ($(DEX2OAT_TARGET_INSTRUCTION_SET_FEATURES),)
-  FINAL_VENDOR_DEFAULT_PROPERTIES += dalvik.vm.isa.$(TARGET_ARCH).features=$(DEX2OAT_TARGET_INSTRUCTION_SET_FEATURES)
-endif
-
-ifdef TARGET_2ND_ARCH
-  FINAL_VENDOR_DEFAULT_PROPERTIES += dalvik.vm.isa.$(TARGET_2ND_ARCH).variant=$($(TARGET_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_CPU_VARIANT_RUNTIME)
-  ifneq ($($(TARGET_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_INSTRUCTION_SET_FEATURES),)
-    FINAL_VENDOR_DEFAULT_PROPERTIES += dalvik.vm.isa.$(TARGET_2ND_ARCH).features=$($(TARGET_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_INSTRUCTION_SET_FEATURES)
-  endif
-endif
-
-# Although these variables are prefixed with TARGET_RECOVERY_, they are also needed under charger
-# mode (via libminui).
-ifdef TARGET_RECOVERY_DEFAULT_ROTATION
-FINAL_VENDOR_DEFAULT_PROPERTIES += \
-    ro.minui.default_rotation=$(TARGET_RECOVERY_DEFAULT_ROTATION)
-endif
-ifdef TARGET_RECOVERY_OVERSCAN_PERCENT
-FINAL_VENDOR_DEFAULT_PROPERTIES += \
-    ro.minui.overscan_percent=$(TARGET_RECOVERY_OVERSCAN_PERCENT)
-endif
-ifdef TARGET_RECOVERY_PIXEL_FORMAT
-FINAL_VENDOR_DEFAULT_PROPERTIES += \
-    ro.minui.pixel_format=$(TARGET_RECOVERY_PIXEL_FORMAT)
-endif
-FINAL_VENDOR_DEFAULT_PROPERTIES := $(call uniq-pairs-by-first-component, \
-    $(FINAL_VENDOR_DEFAULT_PROPERTIES),=)
-
-BUILDINFO_SH := build/make/tools/buildinfo.sh
-BUILDINFO_COMMON_SH := build/make/tools/buildinfo_common.sh
-POST_PROCESS_PROPS :=$= build/make/tools/post_process_props.py
-
-# Generates a set of sysprops common to all partitions to a file.
-# $(1): Partition name
-# $(2): Output file name
-define generate-common-build-props
-	PRODUCT_BRAND="$(PRODUCT_BRAND)" \
-	PRODUCT_DEVICE="$(TARGET_DEVICE)" \
-	PRODUCT_MANUFACTURER="$(PRODUCT_MANUFACTURER)" \
-	PRODUCT_MODEL="$(PRODUCT_MODEL)" \
-	PRODUCT_NAME="$(TARGET_PRODUCT)" \
-	$(call generate-common-build-props-with-product-vars-set,$(1),$(2))
-endef
-
-# Like the above macro, but requiring the relevant PRODUCT_ environment
-# variables to be set when called.
-define generate-common-build-props-with-product-vars-set
-	BUILD_FINGERPRINT="$(BUILD_FINGERPRINT_FROM_FILE)" \
-	BUILD_ID="$(BUILD_ID)" \
-	BUILD_NUMBER="$(BUILD_NUMBER_FROM_FILE)" \
-	BUILD_VERSION_TAGS="$(BUILD_VERSION_TAGS)" \
-	DATE="$(DATE_FROM_FILE)" \
-	PLATFORM_SDK_VERSION="$(PLATFORM_SDK_VERSION)" \
-	PLATFORM_VERSION="$(PLATFORM_VERSION)" \
-	TARGET_BUILD_TYPE="$(TARGET_BUILD_VARIANT)" \
-	bash $(BUILDINFO_COMMON_SH) "$(1)" >> $(2)
-endef
-
-# -----------------------------------------------------------------
-# build.prop
-intermediate_system_build_prop := $(call intermediates-dir-for,ETC,system_build_prop)/build.prop
-INSTALLED_BUILD_PROP_TARGET := $(TARGET_OUT)/build.prop
-ALL_DEFAULT_INSTALLED_MODULES += $(INSTALLED_BUILD_PROP_TARGET)
-
-# TODO(b/117892318) merge DEFAULT into BUILD
-FINAL_DEFAULT_PROPERTIES := \
-    $(call collapse-pairs, $(ADDITIONAL_DEFAULT_PROPERTIES)) \
-    $(call collapse-pairs, $(PRODUCT_SYSTEM_DEFAULT_PROPERTIES))
-FINAL_DEFAULT_PROPERTIES := $(call uniq-pairs-by-first-component, \
-    $(FINAL_DEFAULT_PROPERTIES),=)
-
-FINAL_BUILD_PROPERTIES := \
-    $(call collapse-pairs, $(ADDITIONAL_BUILD_PROPERTIES))
-FINAL_BUILD_PROPERTIES := $(call uniq-pairs-by-first-component, \
-    $(FINAL_BUILD_PROPERTIES),=)
-
-# A list of arbitrary tags describing the build configuration.
-# Force ":=" so we can use +=
-BUILD_VERSION_TAGS := $(BUILD_VERSION_TAGS)
-ifeq ($(TARGET_BUILD_TYPE),debug)
-  BUILD_VERSION_TAGS += debug
-endif
-# The "test-keys" tag marks builds signed with the old test keys,
-# which are available in the SDK.  "dev-keys" marks builds signed with
-# non-default dev keys (usually private keys from a vendor directory).
-# Both of these tags will be removed and replaced with "release-keys"
-# when the target-files is signed in a post-build step.
-ifeq ($(DEFAULT_SYSTEM_DEV_CERTIFICATE),build/make/target/product/security/testkey)
-BUILD_KEYS := test-keys
-else
-BUILD_KEYS := dev-keys
-endif
-BUILD_VERSION_TAGS += $(BUILD_KEYS)
-BUILD_VERSION_TAGS := $(subst $(space),$(comma),$(sort $(BUILD_VERSION_TAGS)))
-
-# A human-readable string that descibes this build in detail.
-build_desc := $(TARGET_PRODUCT)-$(TARGET_BUILD_VARIANT) $(PLATFORM_VERSION) $(BUILD_ID) $(BUILD_NUMBER_FROM_FILE) $(BUILD_VERSION_TAGS)
-$(intermediate_system_build_prop): PRIVATE_BUILD_DESC := $(build_desc)
-
-# The string used to uniquely identify the combined build and product; used by the OTA server.
-ifeq (,$(strip $(BUILD_FINGERPRINT)))
-  ifeq ($(strip $(HAS_BUILD_NUMBER)),false)
-    BF_BUILD_NUMBER := $(BUILD_USERNAME)$$($(DATE_FROM_FILE) +%m%d%H%M)
-  else
-    BF_BUILD_NUMBER := $(file <$(BUILD_NUMBER_FILE))
-  endif
-  BUILD_FINGERPRINT := $(PRODUCT_BRAND)/$(TARGET_PRODUCT)/$(TARGET_DEVICE):$(PLATFORM_VERSION)/$(BUILD_ID)/$(BF_BUILD_NUMBER):$(TARGET_BUILD_VARIANT)/$(BUILD_VERSION_TAGS)
-endif
-# unset it for safety.
-BF_BUILD_NUMBER :=
-
-BUILD_FINGERPRINT_FILE := $(PRODUCT_OUT)/build_fingerprint.txt
-ifneq (,$(shell mkdir -p $(PRODUCT_OUT) && echo $(BUILD_FINGERPRINT) >$(BUILD_FINGERPRINT_FILE) && grep " " $(BUILD_FINGERPRINT_FILE)))
-  $(error BUILD_FINGERPRINT cannot contain spaces: "$(file <$(BUILD_FINGERPRINT_FILE))")
-endif
-BUILD_FINGERPRINT_FROM_FILE := $$(cat $(BUILD_FINGERPRINT_FILE))
-# unset it for safety.
-BUILD_FINGERPRINT :=
-
-# The string used to uniquely identify the system build; used by the OTA server.
-# This purposefully excludes any product-specific variables.
-ifeq (,$(strip $(BUILD_THUMBPRINT)))
-  BUILD_THUMBPRINT := $(PLATFORM_VERSION)/$(BUILD_ID)/$(BUILD_NUMBER_FROM_FILE):$(TARGET_BUILD_VARIANT)/$(BUILD_VERSION_TAGS)
-endif
-
-BUILD_THUMBPRINT_FILE := $(PRODUCT_OUT)/build_thumbprint.txt
-ifneq (,$(shell mkdir -p $(PRODUCT_OUT) && echo $(BUILD_THUMBPRINT) >$(BUILD_THUMBPRINT_FILE) && grep " " $(BUILD_THUMBPRINT_FILE)))
-  $(error BUILD_THUMBPRINT cannot contain spaces: "$(file <$(BUILD_THUMBPRINT_FILE))")
-endif
-BUILD_THUMBPRINT_FROM_FILE := $$(cat $(BUILD_THUMBPRINT_FILE))
-# unset it for safety.
-BUILD_THUMBPRINT :=
-
-KNOWN_OEM_THUMBPRINT_PROPERTIES := \
-    ro.product.brand \
-    ro.product.name \
-    ro.product.device
-OEM_THUMBPRINT_PROPERTIES := $(filter $(KNOWN_OEM_THUMBPRINT_PROPERTIES),\
-    $(PRODUCT_OEM_PROPERTIES))
-
-# Display parameters shown under Settings -> About Phone
-ifeq ($(TARGET_BUILD_VARIANT),user)
-  # User builds should show:
-  # release build number or branch.buld_number non-release builds
-
-  # Dev. branches should have DISPLAY_BUILD_NUMBER set
-  ifeq (true,$(DISPLAY_BUILD_NUMBER))
-    BUILD_DISPLAY_ID := $(BUILD_ID).$(BUILD_NUMBER_FROM_FILE) $(BUILD_KEYS)
-  else
-    BUILD_DISPLAY_ID := $(BUILD_ID) $(BUILD_KEYS)
-  endif
-else
-  # Non-user builds should show detailed build information
-  BUILD_DISPLAY_ID := $(build_desc)
-endif
-
-# Accepts a whitespace separated list of product locales such as
-# (en_US en_AU en_GB...) and returns the first locale in the list with
-# underscores replaced with hyphens. In the example above, this will
-# return "en-US".
-define get-default-product-locale
-$(strip $(subst _,-, $(firstword $(1))))
-endef
-
-# TARGET_BUILD_FLAVOR and ro.build.flavor are used only by the test
-# harness to distinguish builds. Only add _asan for a sanitized build
-# if it isn't already a part of the flavor (via a dedicated lunch
-# config for example).
-TARGET_BUILD_FLAVOR := $(TARGET_PRODUCT)-$(TARGET_BUILD_VARIANT)
-ifneq (, $(filter address, $(SANITIZE_TARGET)))
-ifeq (,$(findstring _asan,$(TARGET_BUILD_FLAVOR)))
-TARGET_BUILD_FLAVOR := $(TARGET_BUILD_FLAVOR)_asan
-endif
-endif
-
-ifdef TARGET_SYSTEM_PROP
-system_prop_file := $(TARGET_SYSTEM_PROP)
-else
-system_prop_file := $(wildcard $(TARGET_DEVICE_DIR)/system.prop)
-endif
-$(intermediate_system_build_prop): $(BUILDINFO_SH) $(BUILDINFO_COMMON_SH) $(INTERNAL_BUILD_ID_MAKEFILE) $(BUILD_SYSTEM)/version_defaults.mk $(system_prop_file) $(INSTALLED_ANDROID_INFO_TXT_TARGET) $(API_FINGERPRINT) $(POST_PROCESS_PROPS)
-	@echo Target buildinfo: $@
-	@mkdir -p $(dir $@)
-	$(hide) rm -f $@ && touch $@
-	$(hide) $(foreach line,$(FINAL_DEFAULT_PROPERTIES), \
-	    echo "$(line)" >> $@;)
-ifndef property_overrides_split_enabled
-	$(hide) $(foreach line,$(FINAL_VENDOR_DEFAULT_PROPERTIES), \
-	    echo "$(line)" >> $@;)
-endif
-ifneq ($(PRODUCT_OEM_PROPERTIES),)
-	$(hide) echo "#" >> $@; \
-	        echo "# PRODUCT_OEM_PROPERTIES" >> $@; \
-	        echo "#" >> $@;
-	$(hide) $(foreach prop,$(PRODUCT_OEM_PROPERTIES), \
-	    echo "import /oem/oem.prop $(prop)" >> $@;)
-endif
-	$(hide) PRODUCT_BRAND="$(PRODUCT_SYSTEM_BRAND)" \
-	        PRODUCT_MANUFACTURER="$(PRODUCT_SYSTEM_MANUFACTURER)" \
-	        PRODUCT_MODEL="$(PRODUCT_SYSTEM_MODEL)" \
-	        PRODUCT_NAME="$(PRODUCT_SYSTEM_NAME)" \
-	        PRODUCT_DEVICE="$(PRODUCT_SYSTEM_DEVICE)" \
-	        $(call generate-common-build-props-with-product-vars-set,system,$@)
-	$(hide) TARGET_BUILD_TYPE="$(TARGET_BUILD_VARIANT)" \
-	        TARGET_BUILD_FLAVOR="$(TARGET_BUILD_FLAVOR)" \
-	        TARGET_DEVICE="$(TARGET_DEVICE)" \
-	        PRODUCT_DEFAULT_LOCALE="$(call get-default-product-locale,$(PRODUCT_LOCALES))" \
-	        PRODUCT_DEFAULT_WIFI_CHANNELS="$(PRODUCT_DEFAULT_WIFI_CHANNELS)" \
-	        PRIVATE_BUILD_DESC="$(PRIVATE_BUILD_DESC)" \
-	        BUILD_ID="$(BUILD_ID)" \
-	        BUILD_DISPLAY_ID="$(BUILD_DISPLAY_ID)" \
-	        DATE="$(DATE_FROM_FILE)" \
-	        BUILD_USERNAME="$(BUILD_USERNAME)" \
-	        BUILD_HOSTNAME="$(BUILD_HOSTNAME)" \
-	        BUILD_NUMBER="$(BUILD_NUMBER_FROM_FILE)" \
-	        BOARD_BUILD_SYSTEM_ROOT_IMAGE="$(BOARD_BUILD_SYSTEM_ROOT_IMAGE)" \
-	        PLATFORM_VERSION="$(PLATFORM_VERSION)" \
-	        PLATFORM_SECURITY_PATCH="$(PLATFORM_SECURITY_PATCH)" \
-	        PLATFORM_BASE_OS="$(PLATFORM_BASE_OS)" \
-	        PLATFORM_SDK_VERSION="$(PLATFORM_SDK_VERSION)" \
-	        PLATFORM_PREVIEW_SDK_VERSION="$(PLATFORM_PREVIEW_SDK_VERSION)" \
-	        PLATFORM_PREVIEW_SDK_FINGERPRINT="$$(cat $(API_FINGERPRINT))" \
-	        PLATFORM_VERSION_CODENAME="$(PLATFORM_VERSION_CODENAME)" \
-	        PLATFORM_VERSION_ALL_CODENAMES="$(PLATFORM_VERSION_ALL_CODENAMES)" \
-	        PLATFORM_MIN_SUPPORTED_TARGET_SDK_VERSION="$(PLATFORM_MIN_SUPPORTED_TARGET_SDK_VERSION)" \
-	        BUILD_VERSION_TAGS="$(BUILD_VERSION_TAGS)" \
-	        $(if $(OEM_THUMBPRINT_PROPERTIES),BUILD_THUMBPRINT="$(BUILD_THUMBPRINT_FROM_FILE)") \
-	        TARGET_CPU_ABI_LIST="$(TARGET_CPU_ABI_LIST)" \
-	        TARGET_CPU_ABI_LIST_32_BIT="$(TARGET_CPU_ABI_LIST_32_BIT)" \
-	        TARGET_CPU_ABI_LIST_64_BIT="$(TARGET_CPU_ABI_LIST_64_BIT)" \
-	        TARGET_CPU_ABI="$(TARGET_CPU_ABI)" \
-	        TARGET_CPU_ABI2="$(TARGET_CPU_ABI2)" \
-	        bash $(BUILDINFO_SH) >> $@
-	$(hide) $(foreach file,$(system_prop_file), \
-	    if [ -f "$(file)" ]; then \
-	        echo Target buildinfo from: "$(file)"; \
-	        echo "" >> $@; \
-	        echo "#" >> $@; \
-	        echo "# from $(file)" >> $@; \
-	        echo "#" >> $@; \
-	        cat $(file) >> $@; \
-	        echo "# end of $(file)" >> $@; \
-	    fi;)
-	$(if $(FINAL_BUILD_PROPERTIES), \
-	    $(hide) echo >> $@; \
-	            echo "#" >> $@; \
-	            echo "# ADDITIONAL_BUILD_PROPERTIES" >> $@; \
-	            echo "#" >> $@; )
-	$(hide) $(foreach line,$(FINAL_BUILD_PROPERTIES), \
-	    echo "$(line)" >> $@;)
-	$(hide) $(POST_PROCESS_PROPS) $@ $(PRODUCT_SYSTEM_PROPERTY_BLACKLIST)
-
-build_desc :=
-
 INSTALLED_RECOVERYIMAGE_TARGET :=
 ifdef BUILDING_RECOVERY_IMAGE
 ifneq ($(BOARD_USES_RECOVERY_AS_BOOT),true)
@@ -457,204 +168,7 @@
 endif
 endif
 
-$(INSTALLED_BUILD_PROP_TARGET): $(intermediate_system_build_prop)
-	@echo "Target build info: $@"
-	$(hide) grep -v 'ro.product.first_api_level' $(intermediate_system_build_prop) > $@
-
-# -----------------------------------------------------------------
-# vendor build.prop
-#
-# For verifying that the vendor build is what we think it is
-INSTALLED_VENDOR_BUILD_PROP_TARGET := $(TARGET_OUT_VENDOR)/build.prop
-ALL_DEFAULT_INSTALLED_MODULES += $(INSTALLED_VENDOR_BUILD_PROP_TARGET)
-
-ifdef TARGET_VENDOR_PROP
-vendor_prop_files := $(TARGET_VENDOR_PROP)
-else
-vendor_prop_files := $(wildcard $(TARGET_DEVICE_DIR)/vendor.prop)
-endif
-
-ifdef property_overrides_split_enabled
-FINAL_VENDOR_BUILD_PROPERTIES += \
-    $(call collapse-pairs, $(PRODUCT_PROPERTY_OVERRIDES))
-FINAL_VENDOR_BUILD_PROPERTIES := $(call uniq-pairs-by-first-component, \
-    $(FINAL_VENDOR_BUILD_PROPERTIES),=)
-endif  # property_overrides_split_enabled
-
-$(INSTALLED_VENDOR_BUILD_PROP_TARGET): $(BUILDINFO_COMMON_SH) $(POST_PROCESS_PROPS) $(intermediate_system_build_prop) $(vendor_prop_files)
-	@echo Target vendor buildinfo: $@
-	@mkdir -p $(dir $@)
-	$(hide) rm -f $@ && touch $@
-ifdef property_overrides_split_enabled
-	$(hide) $(foreach line,$(FINAL_VENDOR_DEFAULT_PROPERTIES), \
-	  echo "$(line)" >> $@;)
-endif
-ifeq ($(PRODUCT_USE_DYNAMIC_PARTITIONS),true)
-	$(hide) echo ro.boot.dynamic_partitions=true >> $@
-endif
-ifeq ($(PRODUCT_RETROFIT_DYNAMIC_PARTITIONS),true)
-	$(hide) echo ro.boot.dynamic_partitions_retrofit=true >> $@
-endif
-	$(hide) grep 'ro.product.first_api_level' $(intermediate_system_build_prop) >> $@ || true
-	$(hide) echo ro.vendor.build.security_patch="$(VENDOR_SECURITY_PATCH)">>$@
-	$(hide) echo ro.vendor.product.cpu.abilist="$(TARGET_CPU_ABI_LIST)">>$@
-	$(hide) echo ro.vendor.product.cpu.abilist32="$(TARGET_CPU_ABI_LIST_32_BIT)">>$@
-	$(hide) echo ro.vendor.product.cpu.abilist64="$(TARGET_CPU_ABI_LIST_64_BIT)">>$@
-	$(hide) echo ro.product.board="$(TARGET_BOOTLOADER_BOARD_NAME)">>$@
-	$(hide) echo ro.board.platform="$(TARGET_BOARD_PLATFORM)">>$@
-	$(hide) echo ro.hwui.use_vulkan="$(TARGET_USES_VULKAN)">>$@
-ifdef TARGET_SCREEN_DENSITY
-	$(hide) echo ro.sf.lcd_density="$(TARGET_SCREEN_DENSITY)">>$@
-endif
-ifeq ($(AB_OTA_UPDATER),true)
-	$(hide) echo ro.build.ab_update=true >> $@
-endif
-	$(hide) $(call generate-common-build-props,vendor,$@)
-	$(hide) echo "#" >> $@; \
-	        echo "# BOOTIMAGE_BUILD_PROPERTIES" >> $@; \
-	        echo "#" >> $@;
-	$(hide) echo ro.bootimage.build.date=`$(DATE_FROM_FILE)`>>$@
-	$(hide) echo ro.bootimage.build.date.utc=`$(DATE_FROM_FILE) +%s`>>$@
-	$(hide) echo ro.bootimage.build.fingerprint="$(BUILD_FINGERPRINT_FROM_FILE)">>$@
-	$(hide) echo "#" >> $@; \
-	        echo "# ADDITIONAL VENDOR BUILD PROPERTIES" >> $@; \
-	        echo "#" >> $@;
-	$(hide) cat $(INSTALLED_ANDROID_INFO_TXT_TARGET) | grep 'require version-' | sed -e 's/require version-/ro.build.expect./g' >> $@
-ifdef property_overrides_split_enabled
-	$(hide) $(foreach file,$(vendor_prop_files), \
-	    if [ -f "$(file)" ]; then \
-	        echo Target vendor properties from: "$(file)"; \
-	        echo "" >> $@; \
-	        echo "#" >> $@; \
-	        echo "# from $(file)" >> $@; \
-	        echo "#" >> $@; \
-	        cat $(file) >> $@; \
-	        echo "# end of $(file)" >> $@; \
-	    fi;)
-	$(hide) $(foreach line,$(FINAL_VENDOR_BUILD_PROPERTIES), \
-	    echo "$(line)" >> $@;)
-endif  # property_overrides_split_enabled
-	$(hide) $(POST_PROCESS_PROPS) $@ $(PRODUCT_VENDOR_PROPERTY_BLACKLIST)
-
-# -----------------------------------------------------------------
-# product build.prop
-INSTALLED_PRODUCT_BUILD_PROP_TARGET := $(TARGET_OUT_PRODUCT)/build.prop
-ALL_DEFAULT_INSTALLED_MODULES += $(INSTALLED_PRODUCT_BUILD_PROP_TARGET)
-
-ifdef TARGET_PRODUCT_PROP
-product_prop_files := $(TARGET_PRODUCT_PROP)
-else
-product_prop_files := $(wildcard $(TARGET_DEVICE_DIR)/product.prop)
-endif
-
-FINAL_PRODUCT_PROPERTIES += \
-    $(call collapse-pairs, $(PRODUCT_PRODUCT_PROPERTIES) $(ADDITIONAL_PRODUCT_PROPERTIES))
-FINAL_PRODUCT_PROPERTIES := $(call uniq-pairs-by-first-component, \
-    $(FINAL_PRODUCT_PROPERTIES),=)
-
-$(INSTALLED_PRODUCT_BUILD_PROP_TARGET): $(BUILDINFO_COMMON_SH) $(POST_PROCESS_PROPS) $(product_prop_files)
-	@echo Target product buildinfo: $@
-	@mkdir -p $(dir $@)
-	$(hide) rm -f $@ && touch $@
-ifdef BOARD_USES_PRODUCTIMAGE
-	$(hide) $(call generate-common-build-props,product,$@)
-endif  # BOARD_USES_PRODUCTIMAGE
-	$(hide) $(foreach file,$(product_prop_files), \
-	    if [ -f "$(file)" ]; then \
-	        echo Target product properties from: "$(file)"; \
-	        echo "" >> $@; \
-	        echo "#" >> $@; \
-	        echo "# from $(file)" >> $@; \
-	        echo "#" >> $@; \
-	        cat $(file) >> $@; \
-	        echo "# end of $(file)" >> $@; \
-	    fi;)
-	$(hide) echo "#" >> $@; \
-	        echo "# ADDITIONAL PRODUCT PROPERTIES" >> $@; \
-	        echo "#" >> $@; \
-	        echo "ro.build.characteristics=$(TARGET_AAPT_CHARACTERISTICS)" >> $@;
-	$(hide) $(foreach line,$(FINAL_PRODUCT_PROPERTIES), \
-	    echo "$(line)" >> $@;)
-	$(hide) $(POST_PROCESS_PROPS) $@
-
-# ----------------------------------------------------------------
-# odm build.prop
-INSTALLED_ODM_BUILD_PROP_TARGET := $(TARGET_OUT_ODM)/etc/build.prop
-ALL_DEFAULT_INSTALLED_MODULES += $(INSTALLED_ODM_BUILD_PROP_TARGET)
-
-ifdef TARGET_ODM_PROP
-odm_prop_files := $(TARGET_ODM_PROP)
-else
-odm_prop_files := $(wildcard $(TARGET_DEVICE_DIR)/odm.prop)
-endif
-
-FINAL_ODM_BUILD_PROPERTIES += \
-    $(call collapse-pairs, $(PRODUCT_ODM_PROPERTIES))
-FINAL_ODM_BUILD_PROPERTIES := $(call uniq-pairs-by-first-component, \
-    $(FINAL_ODM_BUILD_PROPERTIES),=)
-
-$(INSTALLED_ODM_BUILD_PROP_TARGET): $(BUILDINFO_COMMON_SH) $(POST_PROCESS_PROPS) $(odm_prop_files)
-	@echo Target odm buildinfo: $@
-	@mkdir -p $(dir $@)
-	$(hide) rm -f $@ && touch $@
-	$(hide) echo ro.odm.product.cpu.abilist="$(TARGET_CPU_ABI_LIST)">>$@
-	$(hide) echo ro.odm.product.cpu.abilist32="$(TARGET_CPU_ABI_LIST_32_BIT)">>$@
-	$(hide) echo ro.odm.product.cpu.abilist64="$(TARGET_CPU_ABI_LIST_64_BIT)">>$@
-	$(hide) $(call generate-common-build-props,odm,$@)
-	$(hide) $(foreach file,$(odm_prop_files), \
-	    if [ -f "$(file)" ]; then \
-	        echo Target odm properties from: "$(file)"; \
-	        echo "" >> $@; \
-	        echo "#" >> $@; \
-	        echo "# from $(file)" >> $@; \
-	        echo "#" >> $@; \
-	        cat $(file) >> $@; \
-	        echo "# end of $(file)" >> $@; \
-	    fi;)
-	$(hide) echo "#" >> $@; \
-	        echo "# ADDITIONAL ODM BUILD PROPERTIES" >> $@; \
-	        echo "#" >> $@;
-	$(hide) $(foreach line,$(FINAL_ODM_BUILD_PROPERTIES), \
-	    echo "$(line)" >> $@;)
-	$(hide) $(POST_PROCESS_PROPS) $@
-
-# -----------------------------------------------------------------
-# system_ext build.prop
-INSTALLED_SYSTEM_EXT_BUILD_PROP_TARGET := $(TARGET_OUT_SYSTEM_EXT)/build.prop
-ALL_DEFAULT_INSTALLED_MODULES += $(INSTALLED_SYSTEM_EXT_BUILD_PROP_TARGET)
-
-ifdef TARGET_SYSTEM_EXT_PROP
-system_ext_prop_files := $(TARGET_SYSTEM_EXT_PROP)
-else
-system_ext_prop_files := $(wildcard $(TARGET_DEVICE_DIR)/system_ext.prop)
-endif
-
-FINAL_SYSTEM_EXT_PROPERTIES += \
-    $(call collapse-pairs, $(PRODUCT_SYSTEM_EXT_PROPERTIES))
-FINAL_SYSTEM_EXT_PROPERTIES := $(call uniq-pairs-by-first-component, \
-    $(FINAL_SYSTEM_EXT_PROPERTIES),=)
-
-$(INSTALLED_SYSTEM_EXT_BUILD_PROP_TARGET): $(BUILDINFO_COMMON_SH) $(POST_PROCESS_PROPS) $(system_ext_prop_files)
-	@echo Target system_ext buildinfo: $@
-	@mkdir -p $(dir $@)
-	$(hide) rm -f $@ && touch $@
-	$(hide) $(call generate-common-build-props,system_ext,$@)
-	$(hide) $(foreach file,$(system_ext_prop_files), \
-	    if [ -f "$(file)" ]; then \
-	        echo Target system_ext properties from: "$(file)"; \
-	        echo "" >> $@; \
-	        echo "#" >> $@; \
-	        echo "# from $(file)" >> $@; \
-	        echo "#" >> $@; \
-	        cat $(file) >> $@; \
-	        echo "# end of $(file)" >> $@; \
-	    fi;)
-	$(hide) echo "#" >> $@; \
-	        echo "# ADDITIONAL SYSTEM_EXT BUILD PROPERTIES" >> $@; \
-	        echo "#" >> $@;
-	$(hide) $(foreach line,$(FINAL_SYSTEM_EXT_PROPERTIES), \
-	    echo "$(line)" >> $@;)
-	$(hide) $(POST_PROCESS_PROPS) $@
+include $(BUILD_SYSTEM)/sysprop.mk
 
 # ----------------------------------------------------------------
 
@@ -979,7 +493,7 @@
 # directory).
 event_log_tags_src := \
     $(sort $(foreach m,\
-      $(PRODUCT_PACKAGES) \
+      $(call resolve-bitness-for-modules,TARGET,$(PRODUCT_PACKAGES)) \
       $(call module-names-for-tag-list,user), \
       $(ALL_MODULES.$(m).EVENT_LOG_TAGS)) \
       $(filter-out vendor/% device/% out/%,$(all_event_log_tags_src)))
@@ -3365,10 +2879,10 @@
 # When building a standalone recovery image for non-A/B devices, recovery image must be self-signed
 # to be verified independently, and cannot be chained into vbmeta.img. See the link below for
 # details.
-ifneq ($(AB_OTA_UPDATER),true)
+ifeq ($(TARGET_OTA_ALLOW_NON_AB),true)
 ifneq ($(INSTALLED_RECOVERYIMAGE_TARGET),)
 $(if $(BOARD_AVB_RECOVERY_KEY_PATH),,\
-    $(error BOARD_AVB_RECOVERY_KEY_PATH must be defined for non-A/B devices. \
+    $(error BOARD_AVB_RECOVERY_KEY_PATH must be defined for if non-A/B is supported. \
             See https://android.googlesource.com/platform/external/avb/+/master/README.md#booting-into-recovery))
 endif
 endif
@@ -3459,7 +2973,7 @@
 
 # The recovery partition in non-A/B devices should be verified separately. Skip adding the chain
 # partition descriptor for recovery partition into vbmeta.img.
-$(if $(or $(filter true,$(AB_OTA_UPDATER)),$(filter-out recovery,$(part))),\
+$(if $(or $(filter-out true,$(TARGET_OTA_ALLOW_NON_AB)),$(filter-out recovery,$(part))),\
     $(eval INTERNAL_AVB_MAKE_VBMETA_IMAGE_ARGS += \
         --chain_partition $(part):$($(_rollback_index_location)):$(AVB_CHAIN_KEY_DIR)/$(part).avbpubkey))
 
@@ -4254,6 +3768,9 @@
 	$(hide) echo "build_type=$(TARGET_BUILD_VARIANT)" >> $@
 	$(hide) echo "ab_update=true" >> $@
 endif
+ifeq ($(TARGET_OTA_ALLOW_NON_AB),true)
+	$(hide) echo "allow_non_ab=true" >> $@
+endif
 ifdef BOARD_PREBUILT_DTBOIMAGE
 	$(hide) echo "has_dtbo=true" >> $@
 ifeq ($(BOARD_AVB_ENABLE),true)
@@ -4331,10 +3848,13 @@
 
 ifeq ($(AB_OTA_UPDATER),true)
 updater_dep := system/update_engine/update_engine.conf
-else
-# Build OTA tools if not using the AB Updater.
+endif
+
+# Build OTA tools if non-A/B is allowed
+ifeq ($(TARGET_OTA_ALLOW_NON_AB),true)
 updater_dep := $(built_ota_tools)
 endif
+
 $(BUILT_TARGET_FILES_PACKAGE): $(updater_dep)
 
 # If we are using recovery as boot, output recovery files to BOOT/.
@@ -4610,7 +4130,7 @@
 	@# Extra contents of the OTA package
 	$(hide) mkdir -p $(zip_root)/OTA
 	$(hide) cp $(INSTALLED_ANDROID_INFO_TXT_TARGET) $(zip_root)/OTA/
-ifneq ($(AB_OTA_UPDATER),true)
+ifeq ($(TARGET_OTA_ALLOW_NON_AB),true)
 ifneq ($(built_ota_tools),)
 	$(hide) mkdir -p $(zip_root)/OTA/bin
 	$(hide) cp $(PRIVATE_OTA_TOOLS) $(zip_root)/OTA/bin/
@@ -4647,7 +4167,7 @@
 	$(hide) cp $(PRODUCT_ODM_BASE_FS_PATH) \
 	  $(zip_root)/META/$(notdir $(PRODUCT_ODM_BASE_FS_PATH))
 endif
-ifneq ($(AB_OTA_UPDATER),true)
+ifeq ($(TARGET_OTA_ALLOW_NON_AB),true)
 ifneq ($(INSTALLED_RECOVERYIMAGE_TARGET),)
 	$(hide) PATH=$(INTERNAL_USERIMAGES_BINARY_PATHS):$$PATH MKBOOTIMG=$(MKBOOTIMG) \
 	    $(MAKE_RECOVERY_PATCH) $(zip_root) $(zip_root)
diff --git a/core/board_config.mk b/core/board_config.mk
index 2279c3f..0ff28c5 100644
--- a/core/board_config.mk
+++ b/core/board_config.mk
@@ -550,13 +550,31 @@
 .KATI_READONLY := BUILDING_ODM_IMAGE
 
 ###########################################
-# Ensure that only TARGET_RECOVERY_UPDATER_LIBS *or* AB_OTA_UPDATER is set.
+# Ensure consistency among TARGET_RECOVERY_UPDATER_LIBS, AB_OTA_UPDATER, and PRODUCT_OTA_FORCE_NON_AB_PACKAGE.
 TARGET_RECOVERY_UPDATER_LIBS ?=
 AB_OTA_UPDATER ?=
 .KATI_READONLY := TARGET_RECOVERY_UPDATER_LIBS AB_OTA_UPDATER
-ifeq ($(AB_OTA_UPDATER),true)
+
+# Ensure that if PRODUCT_OTA_FORCE_NON_AB_PACKAGE == true, then AB_OTA_UPDATER must be true
+ifeq ($(PRODUCT_OTA_FORCE_NON_AB_PACKAGE),true)
+  ifneq ($(AB_OTA_UPDATER),true)
+    $(error AB_OTA_UPDATER must be set to true when PRODUCT_OTA_FORCE_NON_AB_PACKAGE is true)
+  endif
+endif
+
+# In some configurations, A/B and non-A/B may coexist. Check TARGET_OTA_ALLOW_NON_AB
+# to see if non-A/B is supported.
+TARGET_OTA_ALLOW_NON_AB := false
+ifneq ($(AB_OTA_UPDATER),true)
+  TARGET_OTA_ALLOW_NON_AB := true
+else ifeq ($(PRODUCT_OTA_FORCE_NON_AB_PACKAGE),true)
+  TARGET_OTA_ALLOW_NON_AB := true
+endif
+.KATI_READONLY := TARGET_OTA_ALLOW_NON_AB
+
+ifneq ($(TARGET_OTA_ALLOW_NON_AB),true)
   ifneq ($(strip $(TARGET_RECOVERY_UPDATER_LIBS)),)
-    $(error Do not use TARGET_RECOVERY_UPDATER_LIBS when using AB_OTA_UPDATER)
+    $(error Do not use TARGET_RECOVERY_UPDATER_LIBS when using TARGET_OTA_ALLOW_NON_AB)
   endif
 endif
 
diff --git a/core/config.mk b/core/config.mk
index b2c094b..3d08ba4 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -1215,7 +1215,7 @@
 DEFAULT_DATA_OUT_MODULES := ltp $(ltp_packages) $(kselftest_modules)
 .KATI_READONLY := DEFAULT_DATA_OUT_MODULES
 
-# Make RECORD_ALL_DEPS readonly
-RECORD_ALL_DEPS :=$= $(filter true,$(RECORD_ALL_DEPS))
+# Make RECORD_ALL_DEPS readonly and also set it if deps-license is a goal.
+RECORD_ALL_DEPS :=$= $(filter true,$(RECORD_ALL_DEPS))$(filter deps-license,$(MAKECMDGOALS))
 
 include $(BUILD_SYSTEM)/dumpvar.mk
diff --git a/core/main.mk b/core/main.mk
index 0299e70..9c52b01 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -115,7 +115,7 @@
 # -----------------------------------------------------------------
 # Validate ADDITIONAL_DEFAULT_PROPERTIES.
 ifneq ($(ADDITIONAL_DEFAULT_PROPERTIES),)
-$(error ADDITIONAL_DEFAULT_PROPERTIES must not be set before here: $(ADDITIONAL_DEFAULT_PROPERTIES))
+$(error ADDITIONAL_DEFAULT_PROPERTIES is deprecated)
 endif
 
 #
@@ -207,9 +207,9 @@
 # Sets ro.actionable_compatible_property.enabled to know on runtime whether the whitelist
 # of actionable compatible properties is enabled or not.
 ifeq ($(PRODUCT_ACTIONABLE_COMPATIBLE_PROPERTY_DISABLE),true)
-ADDITIONAL_DEFAULT_PROPERTIES += ro.actionable_compatible_property.enabled=false
+ADDITIONAL_BUILD_PROPERTIES += ro.actionable_compatible_property.enabled=false
 else
-ADDITIONAL_DEFAULT_PROPERTIES += ro.actionable_compatible_property.enabled=${PRODUCT_COMPATIBLE_PROPERTY}
+ADDITIONAL_BUILD_PROPERTIES += ro.actionable_compatible_property.enabled=${PRODUCT_COMPATIBLE_PROPERTY}
 endif
 
 # Add the system server compiler filter if they are specified for the product.
@@ -229,7 +229,7 @@
 #
 # It then uses ${ro.postinstall.fstab.prefix}/etc/fstab.postinstall to
 # mount system_other partition.
-ADDITIONAL_DEFAULT_PROPERTIES += ro.postinstall.fstab.prefix=/system
+ADDITIONAL_BUILD_PROPERTIES += ro.postinstall.fstab.prefix=/system
 
 # Set ro.product.vndk.version to know the VNDK version required by product
 # modules. It uses the version in PRODUCT_PRODUCT_VNDK_VERSION. If the value
@@ -261,11 +261,11 @@
 tags_to_install :=
 ifneq (,$(user_variant))
   # Target is secure in user builds.
-  ADDITIONAL_DEFAULT_PROPERTIES += ro.secure=1
-  ADDITIONAL_DEFAULT_PROPERTIES += security.perf_harden=1
+  ADDITIONAL_BUILD_PROPERTIES += ro.secure=1
+  ADDITIONAL_BUILD_PROPERTIES += security.perf_harden=1
 
   ifeq ($(user_variant),user)
-    ADDITIONAL_DEFAULT_PROPERTIES += ro.adb.secure=1
+    ADDITIONAL_BUILD_PROPERTIES += ro.adb.secure=1
   endif
 
   ifeq ($(user_variant),userdebug)
@@ -277,25 +277,25 @@
   endif
 
   # Disallow mock locations by default for user builds
-  ADDITIONAL_DEFAULT_PROPERTIES += ro.allow.mock.location=0
+  ADDITIONAL_BUILD_PROPERTIES += ro.allow.mock.location=0
 
 else # !user_variant
   # Turn on checkjni for non-user builds.
   ADDITIONAL_BUILD_PROPERTIES += ro.kernel.android.checkjni=1
   # Set device insecure for non-user builds.
-  ADDITIONAL_DEFAULT_PROPERTIES += ro.secure=0
+  ADDITIONAL_BUILD_PROPERTIES += ro.secure=0
   # Allow mock locations by default for non user builds
-  ADDITIONAL_DEFAULT_PROPERTIES += ro.allow.mock.location=1
+  ADDITIONAL_BUILD_PROPERTIES += ro.allow.mock.location=1
 endif # !user_variant
 
 ifeq (true,$(strip $(enable_target_debugging)))
   # Target is more debuggable and adbd is on by default
-  ADDITIONAL_DEFAULT_PROPERTIES += ro.debuggable=1
+  ADDITIONAL_BUILD_PROPERTIES += ro.debuggable=1
   # Enable Dalvik lock contention logging.
   ADDITIONAL_BUILD_PROPERTIES += dalvik.vm.lockprof.threshold=500
 else # !enable_target_debugging
   # Target is less debuggable and adbd is off by default
-  ADDITIONAL_DEFAULT_PROPERTIES += ro.debuggable=0
+  ADDITIONAL_BUILD_PROPERTIES += ro.debuggable=0
 endif # !enable_target_debugging
 
 ## eng ##
@@ -388,8 +388,6 @@
 
 # Strip and readonly a few more variables so they won't be modified.
 $(readonly-final-product-vars)
-ADDITIONAL_DEFAULT_PROPERTIES := $(strip $(ADDITIONAL_DEFAULT_PROPERTIES))
-.KATI_READONLY := ADDITIONAL_DEFAULT_PROPERTIES
 ADDITIONAL_BUILD_PROPERTIES := $(strip $(ADDITIONAL_BUILD_PROPERTIES))
 .KATI_READONLY := ADDITIONAL_BUILD_PROPERTIES
 ADDITIONAL_PRODUCT_PROPERTIES := $(strip $(ADDITIONAL_PRODUCT_PROPERTIES))
@@ -1186,15 +1184,17 @@
 
   # Some modules produce only host installed files when building with TARGET_BUILD_APPS
   ifeq ($(TARGET_BUILD_APPS),)
-    _modules := $(foreach m,$(PRODUCT_PACKAGES) \
-                            $(PRODUCT_PACKAGES_DEBUG) \
-                            $(PRODUCT_PACKAGES_DEBUG_ASAN) \
-                            $(PRODUCT_PACKAGES_ENG) \
-                            $(PRODUCT_PACKAGES_TESTS),\
+    _modules := $(call resolve-bitness-for-modules,TARGET, \
+      $(PRODUCT_PACKAGES) \
+      $(PRODUCT_PACKAGES_DEBUG) \
+      $(PRODUCT_PACKAGES_DEBUG_ASAN) \
+      $(PRODUCT_PACKAGES_ENG) \
+      $(PRODUCT_PACKAGES_TESTS))
+    _host_modules := $(foreach m,$(_modules), \
                   $(if $(ALL_MODULES.$(m).INSTALLED),\
                     $(if $(filter-out $(HOST_OUT_ROOT)/%,$(ALL_MODULES.$(m).INSTALLED)),,\
                       $(m))))
-    $(call maybe-print-list-and-error,$(sort $(_modules)),\
+    $(call maybe-print-list-and-error,$(sort $(_host_modules)),\
       Host modules should be in PRODUCT_HOST_PACKAGES$(comma) not PRODUCT_PACKAGES)
   endif
 
diff --git a/core/ninja_config.mk b/core/ninja_config.mk
index 336048f..1ead512 100644
--- a/core/ninja_config.mk
+++ b/core/ninja_config.mk
@@ -24,6 +24,7 @@
 	continuous_native_tests \
 	cts \
 	custom_images \
+	deps-license \
 	dicttool_aosp \
 	dump-products \
 	eng \
diff --git a/core/product.mk b/core/product.mk
index ea9be72..0aa07ef 100644
--- a/core/product.mk
+++ b/core/product.mk
@@ -393,6 +393,13 @@
 # If set, device retrofits virtual A/B.
 _product_single_value_vars += PRODUCT_VIRTUAL_AB_OTA_RETROFIT
 
+# If set, forcefully generate a non-A/B update package.
+# Note: A device configuration should inherit from virtual_ab_ota_plus_non_ab.mk
+# instead of setting this variable directly.
+# Note: Use TARGET_OTA_ALLOW_NON_AB in the build system because
+# TARGET_OTA_ALLOW_NON_AB takes the value of AB_OTA_UPDATER into account.
+_product_single_value_vars += PRODUCT_OTA_FORCE_NON_AB_PACKAGE
+
 # If set, Java module in product partition cannot use hidden APIs.
 _product_single_value_vars += PRODUCT_ENFORCE_PRODUCT_PARTITION_INTERFACE
 
diff --git a/core/sysprop.mk b/core/sysprop.mk
new file mode 100644
index 0000000..ed13c03
--- /dev/null
+++ b/core/sysprop.mk
@@ -0,0 +1,507 @@
+#
+# Copyright (C) 2020 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# sysprop.mk defines rules for generating <partition>/build.prop files
+
+# -----------------------------------------------------------------
+# property_overrides_split_enabled
+property_overrides_split_enabled :=
+ifeq ($(BOARD_PROPERTY_OVERRIDES_SPLIT_ENABLED), true)
+  property_overrides_split_enabled := true
+endif
+
+# -----------------------------------------------------------------
+# FINAL_VENDOR_DEFAULT_PROPERTIES will be installed in vendor/build.prop if
+# property_overrides_split_enabled is true. Otherwise it will be installed in
+# /system/build.prop
+ifdef BOARD_VNDK_VERSION
+  ifeq ($(BOARD_VNDK_VERSION),current)
+    FINAL_VENDOR_DEFAULT_PROPERTIES := ro.vndk.version=$(PLATFORM_VNDK_VERSION)
+  else
+    FINAL_VENDOR_DEFAULT_PROPERTIES := ro.vndk.version=$(BOARD_VNDK_VERSION)
+  endif
+  ifdef BOARD_VNDK_RUNTIME_DISABLE
+    FINAL_VENDOR_DEFAULT_PROPERTIES += ro.vndk.lite=true
+  endif
+else
+  FINAL_VENDOR_DEFAULT_PROPERTIES := ro.vndk.version=$(PLATFORM_VNDK_VERSION)
+  FINAL_VENDOR_DEFAULT_PROPERTIES += ro.vndk.lite=true
+endif
+FINAL_VENDOR_DEFAULT_PROPERTIES += \
+    $(call collapse-pairs, $(PRODUCT_DEFAULT_PROPERTY_OVERRIDES))
+
+# Add cpu properties for bionic and ART.
+FINAL_VENDOR_DEFAULT_PROPERTIES += ro.bionic.arch=$(TARGET_ARCH)
+FINAL_VENDOR_DEFAULT_PROPERTIES += ro.bionic.cpu_variant=$(TARGET_CPU_VARIANT_RUNTIME)
+FINAL_VENDOR_DEFAULT_PROPERTIES += ro.bionic.2nd_arch=$(TARGET_2ND_ARCH)
+FINAL_VENDOR_DEFAULT_PROPERTIES += ro.bionic.2nd_cpu_variant=$(TARGET_2ND_CPU_VARIANT_RUNTIME)
+
+FINAL_VENDOR_DEFAULT_PROPERTIES += persist.sys.dalvik.vm.lib.2=libart.so
+FINAL_VENDOR_DEFAULT_PROPERTIES += dalvik.vm.isa.$(TARGET_ARCH).variant=$(DEX2OAT_TARGET_CPU_VARIANT_RUNTIME)
+ifneq ($(DEX2OAT_TARGET_INSTRUCTION_SET_FEATURES),)
+  FINAL_VENDOR_DEFAULT_PROPERTIES += dalvik.vm.isa.$(TARGET_ARCH).features=$(DEX2OAT_TARGET_INSTRUCTION_SET_FEATURES)
+endif
+
+ifdef TARGET_2ND_ARCH
+  FINAL_VENDOR_DEFAULT_PROPERTIES += dalvik.vm.isa.$(TARGET_2ND_ARCH).variant=$($(TARGET_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_CPU_VARIANT_RUNTIME)
+  ifneq ($($(TARGET_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_INSTRUCTION_SET_FEATURES),)
+    FINAL_VENDOR_DEFAULT_PROPERTIES += dalvik.vm.isa.$(TARGET_2ND_ARCH).features=$($(TARGET_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_INSTRUCTION_SET_FEATURES)
+  endif
+endif
+
+# Although these variables are prefixed with TARGET_RECOVERY_, they are also needed under charger
+# mode (via libminui).
+ifdef TARGET_RECOVERY_DEFAULT_ROTATION
+FINAL_VENDOR_DEFAULT_PROPERTIES += \
+    ro.minui.default_rotation=$(TARGET_RECOVERY_DEFAULT_ROTATION)
+endif
+ifdef TARGET_RECOVERY_OVERSCAN_PERCENT
+FINAL_VENDOR_DEFAULT_PROPERTIES += \
+    ro.minui.overscan_percent=$(TARGET_RECOVERY_OVERSCAN_PERCENT)
+endif
+ifdef TARGET_RECOVERY_PIXEL_FORMAT
+FINAL_VENDOR_DEFAULT_PROPERTIES += \
+    ro.minui.pixel_format=$(TARGET_RECOVERY_PIXEL_FORMAT)
+endif
+FINAL_VENDOR_DEFAULT_PROPERTIES := $(call uniq-pairs-by-first-component, \
+    $(FINAL_VENDOR_DEFAULT_PROPERTIES),=)
+
+BUILDINFO_SH := build/make/tools/buildinfo.sh
+BUILDINFO_COMMON_SH := build/make/tools/buildinfo_common.sh
+POST_PROCESS_PROPS :=$= build/make/tools/post_process_props.py
+
+# Generates a set of sysprops common to all partitions to a file.
+# $(1): Partition name
+# $(2): Output file name
+define generate-common-build-props
+	PRODUCT_BRAND="$(PRODUCT_BRAND)" \
+	PRODUCT_DEVICE="$(TARGET_DEVICE)" \
+	PRODUCT_MANUFACTURER="$(PRODUCT_MANUFACTURER)" \
+	PRODUCT_MODEL="$(PRODUCT_MODEL)" \
+	PRODUCT_NAME="$(TARGET_PRODUCT)" \
+	$(call generate-common-build-props-with-product-vars-set,$(1),$(2))
+endef
+
+# Like the above macro, but requiring the relevant PRODUCT_ environment
+# variables to be set when called.
+define generate-common-build-props-with-product-vars-set
+	BUILD_FINGERPRINT="$(BUILD_FINGERPRINT_FROM_FILE)" \
+	BUILD_ID="$(BUILD_ID)" \
+	BUILD_NUMBER="$(BUILD_NUMBER_FROM_FILE)" \
+	BUILD_VERSION_TAGS="$(BUILD_VERSION_TAGS)" \
+	DATE="$(DATE_FROM_FILE)" \
+	PLATFORM_SDK_VERSION="$(PLATFORM_SDK_VERSION)" \
+	PLATFORM_VERSION_LAST_STABLE="$(PLATFORM_VERSION_LAST_STABLE)" \
+	PLATFORM_VERSION="$(PLATFORM_VERSION)" \
+	TARGET_BUILD_TYPE="$(TARGET_BUILD_VARIANT)" \
+	bash $(BUILDINFO_COMMON_SH) "$(1)" >> $(2)
+endef
+
+# -----------------------------------------------------------------
+# build.prop
+intermediate_system_build_prop := $(call intermediates-dir-for,ETC,system_build_prop)/build.prop
+INSTALLED_BUILD_PROP_TARGET := $(TARGET_OUT)/build.prop
+ALL_DEFAULT_INSTALLED_MODULES += $(INSTALLED_BUILD_PROP_TARGET)
+
+# TODO(b/117892318) merge DEFAULT into BUILD
+FINAL_DEFAULT_PROPERTIES := \
+    $(call collapse-pairs, $(PRODUCT_SYSTEM_DEFAULT_PROPERTIES))
+FINAL_DEFAULT_PROPERTIES := $(call uniq-pairs-by-first-component, \
+    $(FINAL_DEFAULT_PROPERTIES),=)
+
+FINAL_BUILD_PROPERTIES := \
+    $(call collapse-pairs, $(ADDITIONAL_BUILD_PROPERTIES))
+FINAL_BUILD_PROPERTIES := $(call uniq-pairs-by-first-component, \
+    $(FINAL_BUILD_PROPERTIES),=)
+
+# A list of arbitrary tags describing the build configuration.
+# Force ":=" so we can use +=
+BUILD_VERSION_TAGS := $(BUILD_VERSION_TAGS)
+ifeq ($(TARGET_BUILD_TYPE),debug)
+  BUILD_VERSION_TAGS += debug
+endif
+# The "test-keys" tag marks builds signed with the old test keys,
+# which are available in the SDK.  "dev-keys" marks builds signed with
+# non-default dev keys (usually private keys from a vendor directory).
+# Both of these tags will be removed and replaced with "release-keys"
+# when the target-files is signed in a post-build step.
+ifeq ($(DEFAULT_SYSTEM_DEV_CERTIFICATE),build/make/target/product/security/testkey)
+BUILD_KEYS := test-keys
+else
+BUILD_KEYS := dev-keys
+endif
+BUILD_VERSION_TAGS += $(BUILD_KEYS)
+BUILD_VERSION_TAGS := $(subst $(space),$(comma),$(sort $(BUILD_VERSION_TAGS)))
+
+# A human-readable string that descibes this build in detail.
+build_desc := $(TARGET_PRODUCT)-$(TARGET_BUILD_VARIANT) $(PLATFORM_VERSION) $(BUILD_ID) $(BUILD_NUMBER_FROM_FILE) $(BUILD_VERSION_TAGS)
+$(intermediate_system_build_prop): PRIVATE_BUILD_DESC := $(build_desc)
+
+# The string used to uniquely identify the combined build and product; used by the OTA server.
+ifeq (,$(strip $(BUILD_FINGERPRINT)))
+  ifeq ($(strip $(HAS_BUILD_NUMBER)),false)
+    BF_BUILD_NUMBER := $(BUILD_USERNAME)$$($(DATE_FROM_FILE) +%m%d%H%M)
+  else
+    BF_BUILD_NUMBER := $(file <$(BUILD_NUMBER_FILE))
+  endif
+  BUILD_FINGERPRINT := $(PRODUCT_BRAND)/$(TARGET_PRODUCT)/$(TARGET_DEVICE):$(PLATFORM_VERSION)/$(BUILD_ID)/$(BF_BUILD_NUMBER):$(TARGET_BUILD_VARIANT)/$(BUILD_VERSION_TAGS)
+endif
+# unset it for safety.
+BF_BUILD_NUMBER :=
+
+BUILD_FINGERPRINT_FILE := $(PRODUCT_OUT)/build_fingerprint.txt
+ifneq (,$(shell mkdir -p $(PRODUCT_OUT) && echo $(BUILD_FINGERPRINT) >$(BUILD_FINGERPRINT_FILE) && grep " " $(BUILD_FINGERPRINT_FILE)))
+  $(error BUILD_FINGERPRINT cannot contain spaces: "$(file <$(BUILD_FINGERPRINT_FILE))")
+endif
+BUILD_FINGERPRINT_FROM_FILE := $$(cat $(BUILD_FINGERPRINT_FILE))
+# unset it for safety.
+BUILD_FINGERPRINT :=
+
+# The string used to uniquely identify the system build; used by the OTA server.
+# This purposefully excludes any product-specific variables.
+ifeq (,$(strip $(BUILD_THUMBPRINT)))
+  BUILD_THUMBPRINT := $(PLATFORM_VERSION)/$(BUILD_ID)/$(BUILD_NUMBER_FROM_FILE):$(TARGET_BUILD_VARIANT)/$(BUILD_VERSION_TAGS)
+endif
+
+BUILD_THUMBPRINT_FILE := $(PRODUCT_OUT)/build_thumbprint.txt
+ifneq (,$(shell mkdir -p $(PRODUCT_OUT) && echo $(BUILD_THUMBPRINT) >$(BUILD_THUMBPRINT_FILE) && grep " " $(BUILD_THUMBPRINT_FILE)))
+  $(error BUILD_THUMBPRINT cannot contain spaces: "$(file <$(BUILD_THUMBPRINT_FILE))")
+endif
+BUILD_THUMBPRINT_FROM_FILE := $$(cat $(BUILD_THUMBPRINT_FILE))
+# unset it for safety.
+BUILD_THUMBPRINT :=
+
+KNOWN_OEM_THUMBPRINT_PROPERTIES := \
+    ro.product.brand \
+    ro.product.name \
+    ro.product.device
+OEM_THUMBPRINT_PROPERTIES := $(filter $(KNOWN_OEM_THUMBPRINT_PROPERTIES),\
+    $(PRODUCT_OEM_PROPERTIES))
+
+# Display parameters shown under Settings -> About Phone
+ifeq ($(TARGET_BUILD_VARIANT),user)
+  # User builds should show:
+  # release build number or branch.buld_number non-release builds
+
+  # Dev. branches should have DISPLAY_BUILD_NUMBER set
+  ifeq (true,$(DISPLAY_BUILD_NUMBER))
+    BUILD_DISPLAY_ID := $(BUILD_ID).$(BUILD_NUMBER_FROM_FILE) $(BUILD_KEYS)
+  else
+    BUILD_DISPLAY_ID := $(BUILD_ID) $(BUILD_KEYS)
+  endif
+else
+  # Non-user builds should show detailed build information
+  BUILD_DISPLAY_ID := $(build_desc)
+endif
+
+# Accepts a whitespace separated list of product locales such as
+# (en_US en_AU en_GB...) and returns the first locale in the list with
+# underscores replaced with hyphens. In the example above, this will
+# return "en-US".
+define get-default-product-locale
+$(strip $(subst _,-, $(firstword $(1))))
+endef
+
+# TARGET_BUILD_FLAVOR and ro.build.flavor are used only by the test
+# harness to distinguish builds. Only add _asan for a sanitized build
+# if it isn't already a part of the flavor (via a dedicated lunch
+# config for example).
+TARGET_BUILD_FLAVOR := $(TARGET_PRODUCT)-$(TARGET_BUILD_VARIANT)
+ifneq (, $(filter address, $(SANITIZE_TARGET)))
+ifeq (,$(findstring _asan,$(TARGET_BUILD_FLAVOR)))
+TARGET_BUILD_FLAVOR := $(TARGET_BUILD_FLAVOR)_asan
+endif
+endif
+
+ifdef TARGET_SYSTEM_PROP
+system_prop_file := $(TARGET_SYSTEM_PROP)
+else
+system_prop_file := $(wildcard $(TARGET_DEVICE_DIR)/system.prop)
+endif
+$(intermediate_system_build_prop): $(BUILDINFO_SH) $(BUILDINFO_COMMON_SH) $(INTERNAL_BUILD_ID_MAKEFILE) $(BUILD_SYSTEM)/version_defaults.mk $(system_prop_file) $(INSTALLED_ANDROID_INFO_TXT_TARGET) $(API_FINGERPRINT) $(POST_PROCESS_PROPS)
+	@echo Target buildinfo: $@
+	@mkdir -p $(dir $@)
+	$(hide) rm -f $@ && touch $@
+	$(hide) $(foreach line,$(FINAL_DEFAULT_PROPERTIES), \
+	    echo "$(line)" >> $@;)
+ifndef property_overrides_split_enabled
+	$(hide) $(foreach line,$(FINAL_VENDOR_DEFAULT_PROPERTIES), \
+	    echo "$(line)" >> $@;)
+endif
+ifneq ($(PRODUCT_OEM_PROPERTIES),)
+	$(hide) echo "#" >> $@; \
+	        echo "# PRODUCT_OEM_PROPERTIES" >> $@; \
+	        echo "#" >> $@;
+	$(hide) $(foreach prop,$(PRODUCT_OEM_PROPERTIES), \
+	    echo "import /oem/oem.prop $(prop)" >> $@;)
+endif
+	$(hide) PRODUCT_BRAND="$(PRODUCT_SYSTEM_BRAND)" \
+	        PRODUCT_MANUFACTURER="$(PRODUCT_SYSTEM_MANUFACTURER)" \
+	        PRODUCT_MODEL="$(PRODUCT_SYSTEM_MODEL)" \
+	        PRODUCT_NAME="$(PRODUCT_SYSTEM_NAME)" \
+	        PRODUCT_DEVICE="$(PRODUCT_SYSTEM_DEVICE)" \
+	        $(call generate-common-build-props-with-product-vars-set,system,$@)
+	$(hide) TARGET_BUILD_TYPE="$(TARGET_BUILD_VARIANT)" \
+	        TARGET_BUILD_FLAVOR="$(TARGET_BUILD_FLAVOR)" \
+	        TARGET_DEVICE="$(TARGET_DEVICE)" \
+	        PRODUCT_DEFAULT_LOCALE="$(call get-default-product-locale,$(PRODUCT_LOCALES))" \
+	        PRODUCT_DEFAULT_WIFI_CHANNELS="$(PRODUCT_DEFAULT_WIFI_CHANNELS)" \
+	        PRIVATE_BUILD_DESC="$(PRIVATE_BUILD_DESC)" \
+	        BUILD_ID="$(BUILD_ID)" \
+	        BUILD_DISPLAY_ID="$(BUILD_DISPLAY_ID)" \
+	        DATE="$(DATE_FROM_FILE)" \
+	        BUILD_USERNAME="$(BUILD_USERNAME)" \
+	        BUILD_HOSTNAME="$(BUILD_HOSTNAME)" \
+	        BUILD_NUMBER="$(BUILD_NUMBER_FROM_FILE)" \
+	        BOARD_BUILD_SYSTEM_ROOT_IMAGE="$(BOARD_BUILD_SYSTEM_ROOT_IMAGE)" \
+	        PLATFORM_VERSION="$(PLATFORM_VERSION)" \
+	        PLATFORM_VERSION_LAST_STABLE="$(PLATFORM_VERSION_LAST_STABLE)" \
+	        PLATFORM_SECURITY_PATCH="$(PLATFORM_SECURITY_PATCH)" \
+	        PLATFORM_BASE_OS="$(PLATFORM_BASE_OS)" \
+	        PLATFORM_SDK_VERSION="$(PLATFORM_SDK_VERSION)" \
+	        PLATFORM_PREVIEW_SDK_VERSION="$(PLATFORM_PREVIEW_SDK_VERSION)" \
+	        PLATFORM_PREVIEW_SDK_FINGERPRINT="$$(cat $(API_FINGERPRINT))" \
+	        PLATFORM_VERSION_CODENAME="$(PLATFORM_VERSION_CODENAME)" \
+	        PLATFORM_VERSION_ALL_CODENAMES="$(PLATFORM_VERSION_ALL_CODENAMES)" \
+	        PLATFORM_MIN_SUPPORTED_TARGET_SDK_VERSION="$(PLATFORM_MIN_SUPPORTED_TARGET_SDK_VERSION)" \
+	        BUILD_VERSION_TAGS="$(BUILD_VERSION_TAGS)" \
+	        $(if $(OEM_THUMBPRINT_PROPERTIES),BUILD_THUMBPRINT="$(BUILD_THUMBPRINT_FROM_FILE)") \
+	        TARGET_CPU_ABI_LIST="$(TARGET_CPU_ABI_LIST)" \
+	        TARGET_CPU_ABI_LIST_32_BIT="$(TARGET_CPU_ABI_LIST_32_BIT)" \
+	        TARGET_CPU_ABI_LIST_64_BIT="$(TARGET_CPU_ABI_LIST_64_BIT)" \
+	        TARGET_CPU_ABI="$(TARGET_CPU_ABI)" \
+	        TARGET_CPU_ABI2="$(TARGET_CPU_ABI2)" \
+	        bash $(BUILDINFO_SH) >> $@
+	$(hide) $(foreach file,$(system_prop_file), \
+	    if [ -f "$(file)" ]; then \
+	        echo Target buildinfo from: "$(file)"; \
+	        echo "" >> $@; \
+	        echo "#" >> $@; \
+	        echo "# from $(file)" >> $@; \
+	        echo "#" >> $@; \
+	        cat $(file) >> $@; \
+	        echo "# end of $(file)" >> $@; \
+	    fi;)
+	$(if $(FINAL_BUILD_PROPERTIES), \
+	    $(hide) echo >> $@; \
+	            echo "#" >> $@; \
+	            echo "# ADDITIONAL_BUILD_PROPERTIES" >> $@; \
+	            echo "#" >> $@; )
+	$(hide) $(foreach line,$(FINAL_BUILD_PROPERTIES), \
+	    echo "$(line)" >> $@;)
+	$(hide) $(POST_PROCESS_PROPS) $@ $(PRODUCT_SYSTEM_PROPERTY_BLACKLIST)
+
+build_desc :=
+
+$(INSTALLED_BUILD_PROP_TARGET): $(intermediate_system_build_prop)
+	@echo "Target build info: $@"
+	$(hide) grep -v 'ro.product.first_api_level' $(intermediate_system_build_prop) > $@
+
+# -----------------------------------------------------------------
+# vendor build.prop
+#
+# For verifying that the vendor build is what we think it is
+INSTALLED_VENDOR_BUILD_PROP_TARGET := $(TARGET_OUT_VENDOR)/build.prop
+ALL_DEFAULT_INSTALLED_MODULES += $(INSTALLED_VENDOR_BUILD_PROP_TARGET)
+
+ifdef TARGET_VENDOR_PROP
+vendor_prop_files := $(TARGET_VENDOR_PROP)
+else
+vendor_prop_files := $(wildcard $(TARGET_DEVICE_DIR)/vendor.prop)
+endif
+
+ifdef property_overrides_split_enabled
+FINAL_VENDOR_BUILD_PROPERTIES += \
+    $(call collapse-pairs, $(PRODUCT_PROPERTY_OVERRIDES))
+FINAL_VENDOR_BUILD_PROPERTIES := $(call uniq-pairs-by-first-component, \
+    $(FINAL_VENDOR_BUILD_PROPERTIES),=)
+endif  # property_overrides_split_enabled
+
+$(INSTALLED_VENDOR_BUILD_PROP_TARGET): $(BUILDINFO_COMMON_SH) $(POST_PROCESS_PROPS) $(intermediate_system_build_prop) $(vendor_prop_files)
+	@echo Target vendor buildinfo: $@
+	@mkdir -p $(dir $@)
+	$(hide) rm -f $@ && touch $@
+ifdef property_overrides_split_enabled
+	$(hide) $(foreach line,$(FINAL_VENDOR_DEFAULT_PROPERTIES), \
+	  echo "$(line)" >> $@;)
+endif
+ifeq ($(PRODUCT_USE_DYNAMIC_PARTITIONS),true)
+	$(hide) echo ro.boot.dynamic_partitions=true >> $@
+endif
+ifeq ($(PRODUCT_RETROFIT_DYNAMIC_PARTITIONS),true)
+	$(hide) echo ro.boot.dynamic_partitions_retrofit=true >> $@
+endif
+	$(hide) grep 'ro.product.first_api_level' $(intermediate_system_build_prop) >> $@ || true
+	$(hide) echo ro.vendor.build.security_patch="$(VENDOR_SECURITY_PATCH)">>$@
+	$(hide) echo ro.vendor.product.cpu.abilist="$(TARGET_CPU_ABI_LIST)">>$@
+	$(hide) echo ro.vendor.product.cpu.abilist32="$(TARGET_CPU_ABI_LIST_32_BIT)">>$@
+	$(hide) echo ro.vendor.product.cpu.abilist64="$(TARGET_CPU_ABI_LIST_64_BIT)">>$@
+	$(hide) echo ro.product.board="$(TARGET_BOOTLOADER_BOARD_NAME)">>$@
+	$(hide) echo ro.board.platform="$(TARGET_BOARD_PLATFORM)">>$@
+	$(hide) echo ro.hwui.use_vulkan="$(TARGET_USES_VULKAN)">>$@
+ifdef TARGET_SCREEN_DENSITY
+	$(hide) echo ro.sf.lcd_density="$(TARGET_SCREEN_DENSITY)">>$@
+endif
+ifeq ($(AB_OTA_UPDATER),true)
+	$(hide) echo ro.build.ab_update=true >> $@
+endif
+	$(hide) $(call generate-common-build-props,vendor,$@)
+	$(hide) echo "#" >> $@; \
+	        echo "# BOOTIMAGE_BUILD_PROPERTIES" >> $@; \
+	        echo "#" >> $@;
+	$(hide) echo ro.bootimage.build.date=`$(DATE_FROM_FILE)`>>$@
+	$(hide) echo ro.bootimage.build.date.utc=`$(DATE_FROM_FILE) +%s`>>$@
+	$(hide) echo ro.bootimage.build.fingerprint="$(BUILD_FINGERPRINT_FROM_FILE)">>$@
+	$(hide) echo "#" >> $@; \
+	        echo "# ADDITIONAL VENDOR BUILD PROPERTIES" >> $@; \
+	        echo "#" >> $@;
+	$(hide) cat $(INSTALLED_ANDROID_INFO_TXT_TARGET) | grep 'require version-' | sed -e 's/require version-/ro.build.expect./g' >> $@
+ifdef property_overrides_split_enabled
+	$(hide) $(foreach file,$(vendor_prop_files), \
+	    if [ -f "$(file)" ]; then \
+	        echo Target vendor properties from: "$(file)"; \
+	        echo "" >> $@; \
+	        echo "#" >> $@; \
+	        echo "# from $(file)" >> $@; \
+	        echo "#" >> $@; \
+	        cat $(file) >> $@; \
+	        echo "# end of $(file)" >> $@; \
+	    fi;)
+	$(hide) $(foreach line,$(FINAL_VENDOR_BUILD_PROPERTIES), \
+	    echo "$(line)" >> $@;)
+endif  # property_overrides_split_enabled
+	$(hide) $(POST_PROCESS_PROPS) $@ $(PRODUCT_VENDOR_PROPERTY_BLACKLIST)
+
+
+# -----------------------------------------------------------------
+# product build.prop
+INSTALLED_PRODUCT_BUILD_PROP_TARGET := $(TARGET_OUT_PRODUCT)/build.prop
+ALL_DEFAULT_INSTALLED_MODULES += $(INSTALLED_PRODUCT_BUILD_PROP_TARGET)
+
+ifdef TARGET_PRODUCT_PROP
+product_prop_files := $(TARGET_PRODUCT_PROP)
+else
+product_prop_files := $(wildcard $(TARGET_DEVICE_DIR)/product.prop)
+endif
+
+FINAL_PRODUCT_PROPERTIES += \
+    $(call collapse-pairs, $(PRODUCT_PRODUCT_PROPERTIES) $(ADDITIONAL_PRODUCT_PROPERTIES))
+FINAL_PRODUCT_PROPERTIES := $(call uniq-pairs-by-first-component, \
+    $(FINAL_PRODUCT_PROPERTIES),=)
+
+$(INSTALLED_PRODUCT_BUILD_PROP_TARGET): $(BUILDINFO_COMMON_SH) $(POST_PROCESS_PROPS) $(product_prop_files)
+	@echo Target product buildinfo: $@
+	@mkdir -p $(dir $@)
+	$(hide) rm -f $@ && touch $@
+ifdef BOARD_USES_PRODUCTIMAGE
+	$(hide) $(call generate-common-build-props,product,$@)
+endif  # BOARD_USES_PRODUCTIMAGE
+	$(hide) $(foreach file,$(product_prop_files), \
+	    if [ -f "$(file)" ]; then \
+	        echo Target product properties from: "$(file)"; \
+	        echo "" >> $@; \
+	        echo "#" >> $@; \
+	        echo "# from $(file)" >> $@; \
+	        echo "#" >> $@; \
+	        cat $(file) >> $@; \
+	        echo "# end of $(file)" >> $@; \
+	    fi;)
+	$(hide) echo "#" >> $@; \
+	        echo "# ADDITIONAL PRODUCT PROPERTIES" >> $@; \
+	        echo "#" >> $@; \
+	        echo "ro.build.characteristics=$(TARGET_AAPT_CHARACTERISTICS)" >> $@;
+	$(hide) $(foreach line,$(FINAL_PRODUCT_PROPERTIES), \
+	    echo "$(line)" >> $@;)
+	$(hide) $(POST_PROCESS_PROPS) $@
+
+# ----------------------------------------------------------------
+# odm build.prop
+INSTALLED_ODM_BUILD_PROP_TARGET := $(TARGET_OUT_ODM)/etc/build.prop
+ALL_DEFAULT_INSTALLED_MODULES += $(INSTALLED_ODM_BUILD_PROP_TARGET)
+
+ifdef TARGET_ODM_PROP
+odm_prop_files := $(TARGET_ODM_PROP)
+else
+odm_prop_files := $(wildcard $(TARGET_DEVICE_DIR)/odm.prop)
+endif
+
+FINAL_ODM_BUILD_PROPERTIES += \
+    $(call collapse-pairs, $(PRODUCT_ODM_PROPERTIES))
+FINAL_ODM_BUILD_PROPERTIES := $(call uniq-pairs-by-first-component, \
+    $(FINAL_ODM_BUILD_PROPERTIES),=)
+
+$(INSTALLED_ODM_BUILD_PROP_TARGET): $(BUILDINFO_COMMON_SH) $(POST_PROCESS_PROPS) $(odm_prop_files)
+	@echo Target odm buildinfo: $@
+	@mkdir -p $(dir $@)
+	$(hide) rm -f $@ && touch $@
+	$(hide) echo ro.odm.product.cpu.abilist="$(TARGET_CPU_ABI_LIST)">>$@
+	$(hide) echo ro.odm.product.cpu.abilist32="$(TARGET_CPU_ABI_LIST_32_BIT)">>$@
+	$(hide) echo ro.odm.product.cpu.abilist64="$(TARGET_CPU_ABI_LIST_64_BIT)">>$@
+	$(hide) $(call generate-common-build-props,odm,$@)
+	$(hide) $(foreach file,$(odm_prop_files), \
+	    if [ -f "$(file)" ]; then \
+	        echo Target odm properties from: "$(file)"; \
+	        echo "" >> $@; \
+	        echo "#" >> $@; \
+	        echo "# from $(file)" >> $@; \
+	        echo "#" >> $@; \
+	        cat $(file) >> $@; \
+	        echo "# end of $(file)" >> $@; \
+	    fi;)
+	$(hide) echo "#" >> $@; \
+	        echo "# ADDITIONAL ODM BUILD PROPERTIES" >> $@; \
+	        echo "#" >> $@;
+	$(hide) $(foreach line,$(FINAL_ODM_BUILD_PROPERTIES), \
+	    echo "$(line)" >> $@;)
+	$(hide) $(POST_PROCESS_PROPS) $@
+
+# -----------------------------------------------------------------
+# system_ext build.prop
+INSTALLED_SYSTEM_EXT_BUILD_PROP_TARGET := $(TARGET_OUT_SYSTEM_EXT)/build.prop
+ALL_DEFAULT_INSTALLED_MODULES += $(INSTALLED_SYSTEM_EXT_BUILD_PROP_TARGET)
+
+ifdef TARGET_SYSTEM_EXT_PROP
+system_ext_prop_files := $(TARGET_SYSTEM_EXT_PROP)
+else
+system_ext_prop_files := $(wildcard $(TARGET_DEVICE_DIR)/system_ext.prop)
+endif
+
+FINAL_SYSTEM_EXT_PROPERTIES += \
+    $(call collapse-pairs, $(PRODUCT_SYSTEM_EXT_PROPERTIES))
+FINAL_SYSTEM_EXT_PROPERTIES := $(call uniq-pairs-by-first-component, \
+    $(FINAL_SYSTEM_EXT_PROPERTIES),=)
+
+$(INSTALLED_SYSTEM_EXT_BUILD_PROP_TARGET): $(BUILDINFO_COMMON_SH) $(POST_PROCESS_PROPS) $(system_ext_prop_files)
+	@echo Target system_ext buildinfo: $@
+	@mkdir -p $(dir $@)
+	$(hide) rm -f $@ && touch $@
+	$(hide) $(call generate-common-build-props,system_ext,$@)
+	$(hide) $(foreach file,$(system_ext_prop_files), \
+	    if [ -f "$(file)" ]; then \
+	        echo Target system_ext properties from: "$(file)"; \
+	        echo "" >> $@; \
+	        echo "#" >> $@; \
+	        echo "# from $(file)" >> $@; \
+	        echo "#" >> $@; \
+	        cat $(file) >> $@; \
+	        echo "# end of $(file)" >> $@; \
+	    fi;)
+	$(hide) echo "#" >> $@; \
+	        echo "# ADDITIONAL SYSTEM_EXT BUILD PROPERTIES" >> $@; \
+	        echo "#" >> $@;
+	$(hide) $(foreach line,$(FINAL_SYSTEM_EXT_PROPERTIES), \
+	    echo "$(line)" >> $@;)
+	$(hide) $(POST_PROCESS_PROPS) $@
diff --git a/core/tasks/deps_licenses.mk b/core/tasks/deps_licenses.mk
new file mode 100644
index 0000000..daf986f
--- /dev/null
+++ b/core/tasks/deps_licenses.mk
@@ -0,0 +1,59 @@
+#
+# Copyright (C) 2015 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# Print modules and their transitive dependencies with license files.
+# To invoke, run "make deps-license PROJ_PATH=<proj-path-patterns> DEP_PATH=<dep-path-patterns>".
+# PROJ_PATH restricts the paths of the source modules; DEP_PATH restricts the paths of the dependency modules.
+# Both can be makefile patterns supported by makefile function $(filter).
+# Example: "make deps-license packages/app/% external/%" prints all modules in packages/app/ with their dpendencies in external/.
+# The printout lines look like "<module_name> :: <module_paths> :: <license_files>".
+
+ifneq (,$(filter deps-license,$(MAKECMDGOALS)))
+ifndef PROJ_PATH
+$(error To "make deps-license" you must specify PROJ_PATH and DEP_PATH.)
+endif
+ifndef DEP_PATH
+$(error To "make deps-license" you must specify PROJ_PATH and DEP_PATH.)
+endif
+
+# Expand a module's dependencies transitively.
+# $(1): the variable name to hold the result.
+# $(2): the initial module name.
+define get-module-all-dependencies
+$(eval _gmad_new := $(sort $(filter-out $($(1)),\
+  $(foreach m,$(2),$(ALL_DEPS.$(m).ALL_DEPS)))))\
+$(if $(_gmad_new),$(eval $(1) += $(_gmad_new))\
+  $(call get-module-all-dependencies,$(1),$(_gmad_new)))
+endef
+
+define print-deps-license
+$(foreach m, $(sort $(ALL_DEPS.MODULES)),\
+  $(eval m_p := $(sort $(ALL_MODULES.$(m).PATH) $(ALL_MODULES.$(m)$(TARGET_2ND_ARCH_MODULE_SUFFIX).PATH)))\
+  $(if $(filter $(PROJ_PATH),$(m_p)),\
+    $(eval deps :=)\
+    $(eval $(call get-module-all-dependencies,deps,$(m)))\
+    $(info $(m) :: $(m_p) :: $(ALL_DEPS.$(m).LICENSE))\
+    $(foreach d,$(deps),\
+      $(eval d_p := $(sort $(ALL_MODULES.$(d).PATH) $(ALL_MODULES.$(d)$(TARGET_2ND_ARCH_MODULE_SUFFIX).PATH)))\
+      $(if $(filter $(DEP_PATH),$(d_p)),\
+        $(info $(space)$(space)$(space)$(space)$(d) :: $(d_p) :: $(ALL_DEPS.$(d).LICENSE))))))
+endef
+
+.PHONY: deps-license
+deps-license:
+	@$(call print-deps-license)
+
+endif
diff --git a/core/tasks/tools/compatibility.mk b/core/tasks/tools/compatibility.mk
index 87582a5..89b0b9b 100644
--- a/core/tasks/tools/compatibility.mk
+++ b/core/tasks/tools/compatibility.mk
@@ -30,6 +30,7 @@
 test_artifacts := $(COMPATIBILITY.$(test_suite_name).FILES)
 test_tools := $(HOST_OUT_JAVA_LIBRARIES)/hosttestlib.jar \
   $(HOST_OUT_JAVA_LIBRARIES)/tradefed.jar \
+  $(HOST_OUT_JAVA_LIBRARIES)/tradefed-test-framework.jar \
   $(HOST_OUT_JAVA_LIBRARIES)/loganalysis.jar \
   $(HOST_OUT_JAVA_LIBRARIES)/compatibility-host-util.jar \
   $(HOST_OUT_JAVA_LIBRARIES)/compatibility-host-util-tests.jar \
diff --git a/target/board/BoardConfigEmuCommon.mk b/target/board/BoardConfigEmuCommon.mk
index a2e5518..e9fb096 100644
--- a/target/board/BoardConfigEmuCommon.mk
+++ b/target/board/BoardConfigEmuCommon.mk
@@ -33,8 +33,6 @@
   # emulator needs super.img
   BOARD_BUILD_SUPER_IMAGE_BY_DEFAULT := true
 
-  BOARD_EXT4_SHARE_DUP_BLOCKS := true
-
   # 3G + header
   BOARD_SUPER_PARTITION_SIZE := 3229614080
   BOARD_SUPER_PARTITION_GROUPS := emulator_dynamic_partitions
diff --git a/target/board/BoardConfigMainlineCommon.mk b/target/board/BoardConfigMainlineCommon.mk
index c57968e..bf015e5 100644
--- a/target/board/BoardConfigMainlineCommon.mk
+++ b/target/board/BoardConfigMainlineCommon.mk
@@ -6,6 +6,8 @@
 TARGET_NO_BOOTLOADER := true
 TARGET_NO_RECOVERY := true
 
+BOARD_EXT4_SHARE_DUP_BLOCKS := true
+
 TARGET_USERIMAGES_USE_EXT4 := true
 
 # Mainline devices must have /system_ext, /vendor and /product partitions.
diff --git a/target/board/generic_arm64/BoardConfig.mk b/target/board/generic_arm64/BoardConfig.mk
index 16c6c6d..2963ee4 100644
--- a/target/board/generic_arm64/BoardConfig.mk
+++ b/target/board/generic_arm64/BoardConfig.mk
@@ -54,8 +54,6 @@
 
 include build/make/target/board/BoardConfigGsiCommon.mk
 
-BOARD_EXT4_SHARE_DUP_BLOCKS := true
-
 TARGET_NO_KERNEL := false
 TARGET_NO_VENDOR_BOOT := true
 BOARD_USES_RECOVERY_AS_BOOT := true
diff --git a/target/product/virtual_ab_ota_plus_non_ab.mk b/target/product/virtual_ab_ota_plus_non_ab.mk
new file mode 100644
index 0000000..325d75e
--- /dev/null
+++ b/target/product/virtual_ab_ota_plus_non_ab.mk
@@ -0,0 +1,21 @@
+#
+# Copyright (C) 2020 The Android Open-Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+$(call inherit-product, $(SRC_TARGET_DIR)/product/virtual_ab_ota.mk)
+
+PRODUCT_OTA_FORCE_NON_AB_PACKAGE := true
+
+PRODUCT_PROPERTY_OVERRIDES += ro.virtual_ab.allow_non_ab=true
diff --git a/tools/releasetools/blockimgdiff.py b/tools/releasetools/blockimgdiff.py
index 72f065d..8b6a690 100644
--- a/tools/releasetools/blockimgdiff.py
+++ b/tools/releasetools/blockimgdiff.py
@@ -1558,6 +1558,7 @@
     split_large_apks = []
     cache_size = common.OPTIONS.cache_size
     split_threshold = 0.125
+    assert cache_size is not None
     max_blocks_per_transfer = int(cache_size * split_threshold /
                                   self.tgt.blocksize)
     empty = RangeSet()
diff --git a/tools/releasetools/common.py b/tools/releasetools/common.py
index 2b04334..96f93a8 100644
--- a/tools/releasetools/common.py
+++ b/tools/releasetools/common.py
@@ -848,12 +848,13 @@
 def LoadRecoveryFSTab(read_helper, fstab_version, recovery_fstab_path,
                       system_root_image=False):
   class Partition(object):
-    def __init__(self, mount_point, fs_type, device, length, context):
+    def __init__(self, mount_point, fs_type, device, length, context, slotselect):
       self.mount_point = mount_point
       self.fs_type = fs_type
       self.device = device
       self.length = length
       self.context = context
+      self.slotselect = slotselect
 
   try:
     data = read_helper(recovery_fstab_path)
@@ -881,10 +882,13 @@
 
     # It's a good line, parse it.
     length = 0
+    slotselect = False
     options = options.split(",")
     for i in options:
       if i.startswith("length="):
         length = int(i[7:])
+      elif i == "slotselect":
+        slotselect = True
       else:
         # Ignore all unknown options in the unified fstab.
         continue
@@ -898,7 +902,8 @@
 
     mount_point = pieces[1]
     d[mount_point] = Partition(mount_point=mount_point, fs_type=pieces[2],
-                               device=pieces[0], length=length, context=context)
+                               device=pieces[0], length=length, context=context,
+                               slotselect=slotselect)
 
   # / is used for the system mount point when the root directory is included in
   # system. Other areas assume system is always at "/system" so point /system
@@ -913,7 +918,8 @@
   """Finds the path to recovery fstab and loads its contents."""
   # recovery fstab is only meaningful when installing an update via recovery
   # (i.e. non-A/B OTA). Skip loading fstab if device used A/B OTA.
-  if info_dict.get('ab_update') == 'true':
+  if info_dict.get('ab_update') == 'true' and \
+     info_dict.get("allow_non_ab") != "true":
     return None
 
   # We changed recovery.fstab path in Q, from ../RAMDISK/etc/recovery.fstab to
@@ -2680,11 +2686,12 @@
       self.device = 'map_partition("%s")' % partition
     else:
       if OPTIONS.source_info_dict is None:
-        _, device_path = GetTypeAndDevice("/" + partition, OPTIONS.info_dict)
+        _, device_expr = GetTypeAndDeviceExpr("/" + partition,
+                                              OPTIONS.info_dict)
       else:
-        _, device_path = GetTypeAndDevice("/" + partition,
-                                          OPTIONS.source_info_dict)
-      self.device = '"%s"' % device_path
+        _, device_expr = GetTypeAndDeviceExpr("/" + partition,
+                                              OPTIONS.source_info_dict)
+      self.device = device_expr
 
   @property
   def required_cache(self):
@@ -2916,16 +2923,51 @@
     "squashfs": "EMMC"
 }
 
-
-def GetTypeAndDevice(mount_point, info):
+def GetTypeAndDevice(mount_point, info, check_no_slot=True):
+  """
+  Use GetTypeAndDeviceExpr whenever possible. This function is kept for
+  backwards compatibility. It aborts if the fstab entry has slotselect option
+  (unless check_no_slot is explicitly set to False).
+  """
   fstab = info["fstab"]
   if fstab:
+    if check_no_slot:
+      assert not fstab[mount_point].slotselect, \
+             "Use GetTypeAndDeviceExpr instead"
     return (PARTITION_TYPES[fstab[mount_point].fs_type],
             fstab[mount_point].device)
   else:
     raise KeyError
 
 
+def GetTypeAndDeviceExpr(mount_point, info):
+  """
+  Return the filesystem of the partition, and an edify expression that evaluates
+  to the device at runtime.
+  """
+  fstab = info["fstab"]
+  if fstab:
+    p = fstab[mount_point]
+    device_expr = '"%s"' % fstab[mount_point].device
+    if p.slotselect:
+      device_expr = 'add_slot_suffix(%s)' % device_expr
+    return (PARTITION_TYPES[fstab[mount_point].fs_type], device_expr)
+  else:
+    raise KeyError
+
+
+def GetEntryForDevice(fstab, device):
+  """
+  Returns:
+    The first entry in fstab whose device is the given value.
+  """
+  if not fstab:
+    return None
+  for mount_point in fstab:
+    if fstab[mount_point].device == device:
+      return fstab[mount_point]
+  return None
+
 def ParseCertificate(data):
   """Parses and converts a PEM-encoded certificate into DER-encoded.
 
@@ -3050,8 +3092,10 @@
   try:
     # The following GetTypeAndDevice()s need to use the path in the target
     # info_dict instead of source_info_dict.
-    boot_type, boot_device = GetTypeAndDevice("/boot", info_dict)
-    recovery_type, recovery_device = GetTypeAndDevice("/recovery", info_dict)
+    boot_type, boot_device = GetTypeAndDevice("/boot", info_dict,
+                                              check_no_slot=False)
+    recovery_type, recovery_device = GetTypeAndDevice("/recovery", info_dict,
+                                                      check_no_slot=False)
   except KeyError:
     return
 
@@ -3093,8 +3137,8 @@
        'recovery_size': recovery_img.size,
        'recovery_sha1': recovery_img.sha1,
        'boot_type': boot_type,
-       'boot_device': boot_device,
-       'recovery_type': recovery_type,
+       'boot_device': boot_device + '$(getprop ro.boot.slot_suffix)',
+       'recovery_type': recovery_type + '$(getprop ro.boot.slot_suffix)',
        'recovery_device': recovery_device,
        'bonus_args': bonus_args}
 
diff --git a/tools/releasetools/edify_generator.py b/tools/releasetools/edify_generator.py
index 7ed85fe..99e21f1 100644
--- a/tools/releasetools/edify_generator.py
+++ b/tools/releasetools/edify_generator.py
@@ -183,11 +183,30 @@
     It checks the checksums of the given partitions. If none of them matches the
     expected checksum, updater will additionally look for a backup on /cache.
     """
+    self._CheckSecondTokenNotSlotSuffixed(target, "PatchPartitionExprCheck")
+    self._CheckSecondTokenNotSlotSuffixed(source, "PatchPartitionExprCheck")
+    self.PatchPartitionExprCheck('"%s"' % target, '"%s"' % source)
+
+  def PatchPartitionExprCheck(self, target_expr, source_expr):
+    """Checks whether updater can patch the given partitions.
+
+    It checks the checksums of the given partitions. If none of them matches the
+    expected checksum, updater will additionally look for a backup on /cache.
+
+    Args:
+      target_expr: an Edify expression that serves as the target arg to
+        patch_partition. Must be evaluated to a string in the form of
+        foo:bar:baz:quux
+      source_expr: an Edify expression that serves as the source arg to
+        patch_partition. Must be evaluated to a string in the form of
+        foo:bar:baz:quux
+    """
     self.script.append(self.WordWrap((
-        'patch_partition_check("{target}",\0"{source}") ||\n    abort('
-        '"E{code}: \\"{target}\\" or \\"{source}\\" has unexpected '
-        'contents.");').format(
-            target=target, source=source,
+        'patch_partition_check({target},\0{source}) ||\n    abort('
+        'concat("E{code}: \\"",{target},"\\" or \\"",{source},"\\" has '
+        'unexpected contents."));').format(
+            target=target_expr,
+            source=source_expr,
             code=common.ErrorCode.BAD_PATCH_FILE)))
 
   def CacheFreeSpaceCheck(self, amount):
@@ -218,8 +237,9 @@
       mount_flags = mount_dict.get(p.fs_type, "")
       if p.context is not None:
         mount_flags = p.context + ("," + mount_flags if mount_flags else "")
-      self.script.append('mount("%s", "%s", "%s", "%s", "%s");' % (
-          p.fs_type, common.PARTITION_TYPES[p.fs_type], p.device,
+      self.script.append('mount("%s", "%s", %s, "%s", "%s");' % (
+          p.fs_type, common.PARTITION_TYPES[p.fs_type],
+          self._GetSlotSuffixDeviceForEntry(p),
           p.mount_point, mount_flags))
       self.mounts.add(p.mount_point)
 
@@ -242,8 +262,9 @@
         raise ValueError("Partition %s cannot be tuned\n" % (partition,))
     self.script.append(
         'tune2fs(' + "".join(['"%s", ' % (i,) for i in options]) +
-        '"%s") || abort("E%d: Failed to tune partition %s");' % (
-            p.device, common.ErrorCode.TUNE_PARTITION_FAILURE, partition))
+        '%s) || abort("E%d: Failed to tune partition %s");' % (
+            self._GetSlotSuffixDeviceForEntry(p),
+            common.ErrorCode.TUNE_PARTITION_FAILURE, partition))
 
   def FormatPartition(self, partition):
     """Format the given partition, specified by its mount point (eg,
@@ -252,18 +273,19 @@
     fstab = self.fstab
     if fstab:
       p = fstab[partition]
-      self.script.append('format("%s", "%s", "%s", "%s", "%s");' %
+      self.script.append('format("%s", "%s", %s, "%s", "%s");' %
                          (p.fs_type, common.PARTITION_TYPES[p.fs_type],
-                          p.device, p.length, p.mount_point))
+                          self._GetSlotSuffixDeviceForEntry(p),
+                          p.length, p.mount_point))
 
   def WipeBlockDevice(self, partition):
     if partition not in ("/system", "/vendor"):
       raise ValueError(("WipeBlockDevice doesn't work on %s\n") % (partition,))
     fstab = self.fstab
     size = self.info.get(partition.lstrip("/") + "_size", None)
-    device = fstab[partition].device
+    device = self._GetSlotSuffixDeviceForEntry(fstab[partition])
 
-    self.script.append('wipe_block_device("%s", %s);' % (device, size))
+    self.script.append('wipe_block_device(%s, %s);' % (device, size))
 
   def ApplyPatch(self, srcfile, tgtfile, tgtsize, tgtsha1, *patchpairs):
     """Apply binary patches (in *patchpairs) to the given srcfile to
@@ -296,14 +318,69 @@
     self.PatchPartition(target, source, patch)
 
   def PatchPartition(self, target, source, patch):
-    """Applies the patch to the source partition and writes it to target."""
+    """
+    Applies the patch to the source partition and writes it to target.
+
+    Args:
+      target: the target arg to patch_partition. Must be in the form of
+        foo:bar:baz:quux
+      source: the source arg to patch_partition. Must be in the form of
+        foo:bar:baz:quux
+      patch: the patch arg to patch_partition. Must be an unquoted string.
+    """
+    self._CheckSecondTokenNotSlotSuffixed(target, "PatchPartitionExpr")
+    self._CheckSecondTokenNotSlotSuffixed(source, "PatchPartitionExpr")
+    self.PatchPartitionExpr('"%s"' % target, '"%s"' % source, '"%s"' % patch)
+
+  def PatchPartitionExpr(self, target_expr, source_expr, patch_expr):
+    """
+    Applies the patch to the source partition and writes it to target.
+
+    Args:
+      target_expr: an Edify expression that serves as the target arg to
+        patch_partition. Must be evaluated to a string in the form of
+        foo:bar:baz:quux
+      source_expr: an Edify expression that serves as the source arg to
+        patch_partition. Must be evaluated to a string in the form of
+        foo:bar:baz:quux
+      patch_expr: an Edify expression that serves as the patch arg to
+        patch_partition. Must be evaluated to a string.
+    """
     self.script.append(self.WordWrap((
-        'patch_partition("{target}",\0"{source}",\0'
-        'package_extract_file("{patch}")) ||\n'
-        '    abort("E{code}: Failed to apply patch to {source}");').format(
-            target=target, source=source, patch=patch,
+        'patch_partition({target},\0{source},\0'
+        'package_extract_file({patch})) ||\n'
+        '    abort(concat('
+        '        "E{code}: Failed to apply patch to ",{source}));').format(
+            target=target_expr,
+            source=source_expr,
+            patch=patch_expr,
             code=common.ErrorCode.APPLY_PATCH_FAILURE)))
 
+  def _GetSlotSuffixDeviceForEntry(self, entry=None):
+    """
+    Args:
+      entry: the fstab entry of device "foo"
+    Returns:
+      An edify expression. Caller must not quote result.
+      If foo is slot suffixed, it returns
+        'add_slot_suffix("foo")'
+      Otherwise it returns
+        '"foo"' (quoted)
+    """
+    assert entry is not None
+    if entry.slotselect:
+      return 'add_slot_suffix("%s")' % entry.device
+    return '"%s"' % entry.device
+
+  def _CheckSecondTokenNotSlotSuffixed(self, s, fn):
+    lst = s.split(':')
+    assert(len(s) == 4), "{} does not contain 4 tokens".format(s)
+    if self.fstab:
+      entry = common.GetEntryForDevice(s[1])
+      if entry is not None:
+        assert not entry.slotselect, \
+          "Use %s because %s is slot suffixed" % (fn, s[1])
+
   def WriteRawImage(self, mount_point, fn, mapfn=None):
     """Write the given package file into the partition for the given
     mount point."""
@@ -312,15 +389,16 @@
     if fstab:
       p = fstab[mount_point]
       partition_type = common.PARTITION_TYPES[p.fs_type]
-      args = {'device': p.device, 'fn': fn}
+      device = self._GetSlotSuffixDeviceForEntry(p)
+      args = {'device': device, 'fn': fn}
       if partition_type == "EMMC":
         if mapfn:
           args["map"] = mapfn
           self.script.append(
-              'package_extract_file("%(fn)s", "%(device)s", "%(map)s");' % args)
+              'package_extract_file("%(fn)s", %(device)s, "%(map)s");' % args)
         else:
           self.script.append(
-              'package_extract_file("%(fn)s", "%(device)s");' % args)
+              'package_extract_file("%(fn)s", %(device)s);' % args)
       else:
         raise ValueError(
             "don't know how to write \"%s\" partitions" % p.fs_type)
diff --git a/tools/releasetools/ota_from_target_files.py b/tools/releasetools/ota_from_target_files.py
index ad001d1..16b278a 100755
--- a/tools/releasetools/ota_from_target_files.py
+++ b/tools/releasetools/ota_from_target_files.py
@@ -78,6 +78,13 @@
       Write a copy of the metadata to a separate file. Therefore, users can
       read the post build fingerprint without extracting the OTA package.
 
+  --force_non_ab
+      This flag can only be set on an A/B device that also supports non-A/B
+      updates. Implies --two_step.
+      If set, generate that non-A/B update package.
+      If not set, generates A/B package for A/B device and non-A/B package for
+      non-A/B device.
+
 Non-A/B OTA specific options
 
   -b  (--binary) <file>
@@ -251,6 +258,7 @@
 OPTIONS.output_metadata_path = None
 OPTIONS.disable_fec_computation = False
 OPTIONS.boot_variable_values = None
+OPTIONS.force_non_ab = False
 
 
 METADATA_NAME = 'META-INF/com/android/metadata'
@@ -933,7 +941,7 @@
           'ro.build.version.security_patch'),
   }
 
-  if target_info.is_ab:
+  if target_info.is_ab and not OPTIONS.force_non_ab:
     metadata['ota-type'] = 'AB'
     metadata['ota-required-cache'] = '0'
   else:
@@ -1455,7 +1463,8 @@
   required_cache_sizes = [diff.required_cache for diff in
                           block_diff_dict.values()]
   if updating_boot:
-    boot_type, boot_device = common.GetTypeAndDevice("/boot", source_info)
+    boot_type, boot_device_expr = common.GetTypeAndDeviceExpr("/boot",
+                                                              source_info)
     d = common.Difference(target_boot, source_boot)
     _, _, d = d.ComputePatch()
     if d is None:
@@ -1470,11 +1479,11 @@
 
       common.ZipWriteStr(output_zip, "boot.img.p", d)
 
-      script.PatchPartitionCheck(
-          "{}:{}:{}:{}".format(
-              boot_type, boot_device, target_boot.size, target_boot.sha1),
-          "{}:{}:{}:{}".format(
-              boot_type, boot_device, source_boot.size, source_boot.sha1))
+      target_expr = 'concat("{}:",{},":{}:{}")'.format(
+          boot_type, boot_device_expr, target_boot.size, target_boot.sha1)
+      source_expr = 'concat("{}:",{},":{}:{}")'.format(
+          boot_type, boot_device_expr, source_boot.size, source_boot.sha1)
+      script.PatchPartitionExprCheck(target_expr, source_expr)
 
       required_cache_sizes.append(target_boot.size)
 
@@ -1542,12 +1551,11 @@
         logger.info("boot image changed; including patch.")
         script.Print("Patching boot image...")
         script.ShowProgress(0.1, 10)
-        script.PatchPartition(
-            '{}:{}:{}:{}'.format(
-                boot_type, boot_device, target_boot.size, target_boot.sha1),
-            '{}:{}:{}:{}'.format(
-                boot_type, boot_device, source_boot.size, source_boot.sha1),
-            'boot.img.p')
+        target_expr = 'concat("{}:",{},":{}:{}")'.format(
+            boot_type, boot_device_expr, target_boot.size, target_boot.sha1)
+        source_expr = 'concat("{}:",{},":{}:{}")'.format(
+            boot_type, boot_device_expr, source_boot.size, source_boot.sha1)
+        script.PatchPartitionExpr(target_expr, source_expr, '"boot.img.p"')
     else:
       logger.info("boot image unchanged; skipping.")
 
@@ -2067,6 +2075,8 @@
       OPTIONS.output_metadata_path = a
     elif o == "--disable_fec_computation":
       OPTIONS.disable_fec_computation = True
+    elif o == "--force_non_ab":
+      OPTIONS.force_non_ab = True
     else:
       return False
     return True
@@ -2103,6 +2113,7 @@
                                  "skip_compatibility_check",
                                  "output_metadata_path=",
                                  "disable_fec_computation",
+                                 "force_non_ab",
                              ], extra_option_handler=option_handler)
 
   if len(args) != 2:
@@ -2164,11 +2175,17 @@
     OPTIONS.skip_postinstall = True
 
   ab_update = OPTIONS.info_dict.get("ab_update") == "true"
+  allow_non_ab = OPTIONS.info_dict.get("allow_non_ab") == "true"
+  if OPTIONS.force_non_ab:
+    assert allow_non_ab, "--force_non_ab only allowed on devices that supports non-A/B"
+    assert ab_update, "--force_non_ab only allowed on A/B devices"
+
+  generate_ab = not OPTIONS.force_non_ab and ab_update
 
   # Use the default key to sign the package if not specified with package_key.
   # package_keys are needed on ab_updates, so always define them if an
-  # ab_update is getting created.
-  if not OPTIONS.no_signing or ab_update:
+  # A/B update is getting created.
+  if not OPTIONS.no_signing or generate_ab:
     if OPTIONS.package_key is None:
       OPTIONS.package_key = OPTIONS.info_dict.get(
           "default_system_dev_certificate",
@@ -2176,7 +2193,7 @@
     # Get signing keys
     OPTIONS.key_passwords = common.GetKeyPasswords([OPTIONS.package_key])
 
-  if ab_update:
+  if generate_ab:
     GenerateAbOtaPackage(
         target_file=args[0],
         output_file=args[1],