Merge "Document how APEXes are identified in the boot jar variables."
diff --git a/CleanSpec.mk b/CleanSpec.mk
index 3beadff..e96735b 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -757,6 +757,9 @@
 # vendor-ramdisk renamed to vendor_ramdisk
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/vendor-ramdisk)
 
+# Common R directory has been removed.
+$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/R)
+
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************
diff --git a/core/Makefile b/core/Makefile
index f96e7b3..aaefacd 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -5363,25 +5363,34 @@
 endif # BUILD_OS == linux
 
 DEXPREOPT_CONFIG_ZIP := $(PRODUCT_OUT)/dexpreopt_config.zip
-$(DEXPREOPT_CONFIG_ZIP): $(FULL_SYSTEMIMAGE_DEPS) \
-	    $(INTERNAL_RAMDISK_FILES) \
-	    $(INTERNAL_USERDATAIMAGE_FILES) \
-	    $(INTERNAL_VENDORIMAGE_FILES) \
-	    $(INTERNAL_PRODUCTIMAGE_FILES) \
-	    $(INTERNAL_SYSTEM_EXTIMAGE_FILES) \
-	    $(DEX_PREOPT_CONFIG_FOR_MAKE) \
-	    $(DEX_PREOPT_SOONG_CONFIG_FOR_MAKE)
+
+$(DEXPREOPT_CONFIG_ZIP): $(INSTALLED_SYSTEMIMAGE_TARGET) \
+    $(INSTALLED_VENDORIMAGE_TARGET) \
+    $(INSTALLED_ODMIMAGE_TARGET) \
+    $(INSTALLED_PRODUCTIMAGE_TARGET) \
+
+ifeq (,$(TARGET_BUILD_UNBUNDLED))
+$(DEXPREOPT_CONFIG_ZIP): $(DEX_PREOPT_CONFIG_FOR_MAKE) \
+	  $(DEX_PREOPT_SOONG_CONFIG_FOR_MAKE) \
+
+endif
 
 $(DEXPREOPT_CONFIG_ZIP): $(SOONG_ZIP)
 	$(hide) mkdir -p $(dir $@) $(PRODUCT_OUT)/dexpreopt_config
+
+ifeq (,$(TARGET_BUILD_UNBUNDLED))
 ifneq (,$(DEX_PREOPT_CONFIG_FOR_MAKE))
 	$(hide) cp $(DEX_PREOPT_CONFIG_FOR_MAKE) $(PRODUCT_OUT)/dexpreopt_config
 endif
 ifneq (,$(DEX_PREOPT_SOONG_CONFIG_FOR_MAKE))
 	$(hide) cp $(DEX_PREOPT_SOONG_CONFIG_FOR_MAKE) $(PRODUCT_OUT)/dexpreopt_config
 endif
+endif #!TARGET_BUILD_UNBUNDLED
 	$(hide) $(SOONG_ZIP) -d -o $@ -C $(PRODUCT_OUT)/dexpreopt_config -D $(PRODUCT_OUT)/dexpreopt_config
 
+.PHONY: dexpreopt_config_zip
+dexpreopt_config_zip: $(DEXPREOPT_CONFIG_ZIP)
+
 # -----------------------------------------------------------------
 # A zip of the symbols directory.  Keep the full paths to make it
 # more obvious where these files came from.
diff --git a/core/android_soong_config_vars.mk b/core/android_soong_config_vars.mk
index 6c39b2b..46b588e 100644
--- a/core/android_soong_config_vars.mk
+++ b/core/android_soong_config_vars.mk
@@ -39,6 +39,13 @@
 ifneq (,$(findstring .android.art,$(TARGET_BUILD_APPS)))
   # Build ART modules from source if they are listed in TARGET_BUILD_APPS.
   SOONG_CONFIG_art_module_source_build := true
+else ifeq (,$(filter-out modules_% mainline_modules_%,$(TARGET_PRODUCT)))
+  # Always build from source for the module targets. This ought to be covered by
+  # the TARGET_BUILD_APPS check above, but there are test builds that don't set it.
+  SOONG_CONFIG_art_module_source_build := true
+else ifdef MODULES_BUILD_FROM_SOURCE
+  # Build from source if other Mainline modules are.
+  SOONG_CONFIG_art_module_source_build := true
 else ifneq (,$(filter true,$(NATIVE_COVERAGE) $(CLANG_COVERAGE)))
   # Always build ART APEXes from source in coverage builds since the prebuilts
   # aren't built with instrumentation.
@@ -51,6 +58,19 @@
   # Fuchsia picks out ART internal packages that aren't available in the
   # prebuilt.
   SOONG_CONFIG_art_module_source_build := true
+else ifeq (,$(filter x86 x86_64,$(HOST_CROSS_ARCH)))
+  # We currently only provide prebuilts for x86 on host. This skips prebuilts in
+  # cuttlefish builds for ARM servers.
+  SOONG_CONFIG_art_module_source_build := true
+else ifneq (,$(filter dex2oatds dex2oats,$(PRODUCT_HOST_PACKAGES)))
+  # Some products depend on host tools that aren't available as prebuilts.
+  SOONG_CONFIG_art_module_source_build := true
+else ifeq (,$(filter com.google.android.art,$(PRODUCT_PACKAGES)))
+  # TODO(b/192006406): There is currently no good way to control which prebuilt
+  # APEX (com.google.android.art or com.android.art) gets picked for deapexing
+  # to provide dex jars for hiddenapi and dexpreopting. Instead the AOSP APEX is
+  # completely disabled, and we build from source for AOSP products.
+  SOONG_CONFIG_art_module_source_build := true
 else
   # This sets the default for building ART APEXes from source rather than
   # prebuilts (in packages/modules/ArtPrebuilt and prebuilt/module_sdk/art) in
diff --git a/core/config.mk b/core/config.mk
index e30ff3f..acdf15e 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -445,6 +445,11 @@
 ifneq ($(filter true,$(SOONG_ALLOW_MISSING_DEPENDENCIES)),)
 ALLOW_MISSING_DEPENDENCIES := true
 endif
+# Mac builds default to ALLOW_MISSING_DEPENDENCIES, at least until the host
+# tools aren't enabled by default for Mac.
+ifeq ($(HOST_OS),darwin)
+  ALLOW_MISSING_DEPENDENCIES := true
+endif
 .KATI_READONLY := ALLOW_MISSING_DEPENDENCIES
 
 TARGET_BUILD_USE_PREBUILT_SDKS :=
diff --git a/core/definitions.mk b/core/definitions.mk
index 102827b..0fd023a 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -1106,11 +1106,11 @@
 $(hide) mkdir -p $(dir $@)
 $(hide) $(BCC_COMPAT) -O3 -o $(dir $@)/$(notdir $(<:.bc=.o)) -fPIC -shared \
   -rt-path $(RS_PREBUILT_CLCORE) -mtriple $(RS_COMPAT_TRIPLE) $<
-$(hide) $(PRIVATE_CXX_LINK) -shared -Wl,-soname,$(notdir $@) -nostdlib \
+$(hide) $(PRIVATE_CXX_LINK) -fuse-ld=lld -target $(CLANG_TARGET_TRIPLE) -shared -Wl,-soname,$(notdir $@) -nostdlib \
   -Wl,-rpath,\$$ORIGIN/../lib \
   $(dir $@)/$(notdir $(<:.bc=.o)) \
   $(RS_PREBUILT_COMPILER_RT) \
-  -o $@ $(CLANG_TARGET_GLOBAL_LDFLAGS) -Wl,--hash-style=sysv \
+  -o $@ $(CLANG_TARGET_GLOBAL_LLDFLAGS) -Wl,--hash-style=sysv \
   -L $(SOONG_OUT_DIR)/ndk/platforms/android-$(PRIVATE_SDK_VERSION)/arch-$(TARGET_ARCH)/usr/lib64 \
   -L $(SOONG_OUT_DIR)/ndk/platforms/android-$(PRIVATE_SDK_VERSION)/arch-$(TARGET_ARCH)/usr/lib \
   $(call intermediates-dir-for,SHARED_LIBRARIES,libRSSupport)/libRSSupport.so \
@@ -1928,21 +1928,10 @@
 # b/37750224
 AAPT_ASAN_OPTIONS := ASAN_OPTIONS=detect_leaks=0
 
-# Search for generated R.java/Manifest.java in $1, copy the found R.java as $2.
-# Also copy them to a central 'R' directory to make it easier to add the files to an IDE.
+# Search for generated R.java in $1, copy the found R.java as $2.
 define find-generated-R.java
-$(hide) for GENERATED_MANIFEST_FILE in `find $(1) \
-  -name Manifest.java 2> /dev/null`; do \
-    dir=`awk '/package/{gsub(/\./,"/",$$2);gsub(/;/,"",$$2);print $$2;exit}' $$GENERATED_MANIFEST_FILE`; \
-    mkdir -p $(TARGET_COMMON_OUT_ROOT)/R/$$dir; \
-    cp $$GENERATED_MANIFEST_FILE $(TARGET_COMMON_OUT_ROOT)/R/$$dir; \
-  done;
 $(hide) for GENERATED_R_FILE in `find $(1) \
   -name R.java 2> /dev/null`; do \
-    dir=`awk '/package/{gsub(/\./,"/",$$2);gsub(/;/,"",$$2);print $$2;exit}' $$GENERATED_R_FILE`; \
-    mkdir -p $(TARGET_COMMON_OUT_ROOT)/R/$$dir; \
-    cp $$GENERATED_R_FILE $(TARGET_COMMON_OUT_ROOT)/R/$$dir \
-      || exit 31; \
     cp $$GENERATED_R_FILE $(2) || exit 32; \
   done;
 @# Ensure that the target file is always created, i.e. also in case we did not
diff --git a/core/dex_preopt_odex_install.mk b/core/dex_preopt_odex_install.mk
index a2837f3..fcdfa82 100644
--- a/core/dex_preopt_odex_install.mk
+++ b/core/dex_preopt_odex_install.mk
@@ -278,6 +278,7 @@
 my_dexpreopt_image_locations_on_host :=
 my_dexpreopt_image_locations_on_device :=
 my_dexpreopt_infix := boot
+my_create_dexpreopt_config :=
 ifeq (true, $(DEXPREOPT_USE_ART_IMAGE))
   my_dexpreopt_infix := art
 endif
@@ -293,7 +294,16 @@
       LOCAL_UNCOMPRESS_DEX := true
     endif
   endif
+  my_create_dexpreopt_config := true
+endif
 
+# dexpreopt is disabled when TARGET_BUILD_UNBUNDLED_IMAGE is true,
+# but dexpreopt config files are required to dexpreopt in post-processing.
+ifeq ($(TARGET_BUILD_UNBUNDLED_IMAGE),true)
+  my_create_dexpreopt_config := true
+endif
+
+ifeq ($(my_create_dexpreopt_config), true)
   ifeq ($(LOCAL_MODULE_CLASS),JAVA_LIBRARIES)
     my_module_multilib := $(LOCAL_MULTILIB)
     # If the module is not an SDK library and it's a system server jar, only preopt the primary arch.
@@ -402,8 +412,6 @@
 
   my_dexpreopt_config := $(intermediates)/dexpreopt.config
   my_dexpreopt_config_for_postprocessing := $(PRODUCT_OUT)/dexpreopt_config/$(LOCAL_MODULE)_dexpreopt.config
-  my_dexpreopt_script := $(intermediates)/dexpreopt.sh
-  my_dexpreopt_zip := $(intermediates)/dexpreopt.zip
   my_dexpreopt_config_merger := $(BUILD_SYSTEM)/dex_preopt_config_merger.py
 
   $(my_dexpreopt_config): $(my_dexpreopt_dep_configs) $(my_dexpreopt_config_merger)
@@ -416,6 +424,13 @@
 	echo -e -n '$(subst $(newline),\n,$(subst ','\'',$(subst \,\\,$(PRIVATE_CONTENTS))))' > $@
 	$(PRIVATE_CONFIG_MERGER) $@ $(PRIVATE_DEP_CONFIGS)
 
+$(eval $(call copy-one-file,$(my_dexpreopt_config),$(my_dexpreopt_config_for_postprocessing)))
+
+$(LOCAL_INSTALLED_MODULE): $(my_dexpreopt_config_for_postprocessing)
+
+ifdef LOCAL_DEX_PREOPT
+  my_dexpreopt_script := $(intermediates)/dexpreopt.sh
+  my_dexpreopt_zip := $(intermediates)/dexpreopt.zip
   .KATI_RESTAT: $(my_dexpreopt_script)
   $(my_dexpreopt_script): PRIVATE_MODULE := $(LOCAL_MODULE)
   $(my_dexpreopt_script): PRIVATE_GLOBAL_SOONG_CONFIG := $(DEX_PREOPT_SOONG_CONFIG_FOR_MAKE)
@@ -431,8 +446,6 @@
 	-dexpreopt_script $@ \
 	-out_dir $(OUT_DIR)
 
-  $(eval $(call copy-one-file,$(my_dexpreopt_config),$(my_dexpreopt_config_for_postprocessing)))
-
   my_dexpreopt_deps := $(my_dex_jar)
   my_dexpreopt_deps += $(if $(my_process_profile),$(LOCAL_DEX_PREOPT_PROFILE))
   my_dexpreopt_deps += \
@@ -468,7 +481,6 @@
 
   $(LOCAL_INSTALLED_MODULE): PRIVATE_POST_INSTALL_CMD := $(LOCAL_POST_INSTALL_CMD)
   $(LOCAL_INSTALLED_MODULE): $(my_dexpreopt_zip)
-  $(LOCAL_INSTALLED_MODULE): $(my_dexpreopt_config_for_postprocessing)
 
   $(my_all_targets): $(my_dexpreopt_zip)
 
@@ -477,3 +489,4 @@
   my_dexpreopt_zip :=
   my_dexpreopt_config_for_postprocessing :=
 endif # LOCAL_DEX_PREOPT
+endif # my_create_dexpreopt_config
\ No newline at end of file
diff --git a/core/java_renderscript.mk b/core/java_renderscript.mk
index 572d6e4..055ff14 100644
--- a/core/java_renderscript.mk
+++ b/core/java_renderscript.mk
@@ -107,7 +107,7 @@
 # Prevent these from showing up on the device
 # One exception is librsjni.so, which is needed for
 # both native path and compat path.
-rs_jni_lib := $(call intermediates-dir-for,SHARED_LIBRARIES,librsjni.so)/librsjni.so
+rs_jni_lib := $(call intermediates-dir-for,SHARED_LIBRARIES,librsjni)/librsjni.so
 LOCAL_JNI_SHARED_LIBRARIES += librsjni
 
 ifneq (,$(TARGET_BUILD_USE_PREBUILT_SDKS)$(FORCE_BUILD_RS_COMPAT))
diff --git a/core/main.mk b/core/main.mk
index 0393bee..21f4387 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -547,7 +547,12 @@
 
 $(foreach mk,$(subdir_makefiles),$(info [$(call inc_and_print,subdir_makefiles_inc)/$(subdir_makefiles_total)] including $(mk) ...)$(eval include $(mk)))
 
+# For an unbundled image, we can skip blueprint_tools because unbundled image
+# aims to remove a large number framework projects from the manifest, the
+# sources or dependencies for these tools may be missing from the tree.
+ifeq (,$(TARGET_BUILD_UNBUNDLED_IMAGE))
 droid_targets : blueprint_tools
+endif
 
 endif # dont_bother
 
@@ -1732,7 +1737,6 @@
   $(call dist-for-goals, droidcore, \
     $(BUILT_OTATOOLS_PACKAGE) \
     $(APPCOMPAT_ZIP) \
-    $(DEXPREOPT_CONFIG_ZIP) \
     $(DEXPREOPT_TOOLS_ZIP) \
   )
 
@@ -1780,6 +1784,7 @@
     $(INSTALLED_ANDROID_INFO_TXT_TARGET) \
     $(INSTALLED_MISC_INFO_TARGET) \
     $(INSTALLED_RAMDISK_TARGET) \
+    $(DEXPREOPT_CONFIG_ZIP) \
   )
 
   # Put a copy of the radio/bootloader files in the dist dir.
diff --git a/core/product_config.rbc b/core/product_config.rbc
index 111e759..8e85c4b 100644
--- a/core/product_config.rbc
+++ b/core/product_config.rbc
@@ -62,7 +62,8 @@
     elif _options.format == "pretty":
         print(attr, "=", repr(value))
     elif _options.format == "make":
-        print(attr, ":=", value)
+        # Trim all spacing to a single space
+        print(attr, ":=", _mkstrip(value))
     else:
         fail("bad output format", _options.format)
 
@@ -432,6 +433,66 @@
     """Prints info."""
     print(message)
 
+
+def __mkpatsubst_word(parsed_pattern,parsed_subst, word):
+    (before, after) = parsed_pattern
+    if not word.startswith(before):
+        return word
+    if not word.endswith(after):
+        return word
+    if len(parsed_subst) < 2:
+        return parsed_subst[0]
+    return parsed_subst[0] + word[len(before):len(word) - len(after)] + parsed_subst[1]
+
+
+def _mkpatsubst(pattern, replacement, s):
+    """Emulates Make's patsubst.
+
+    Tokenizes `s` (unless it is already a list), and then performs a simple
+    wildcard substitution (in other words, `foo%bar` pattern is equivalent to
+    the regular expression `^foo(.*)bar$, and the first `%` in replacement is
+    $1 in regex terms). Escaping % is not supported
+    """
+    if pattern.find("\\") >= 0:
+        fail("'\\' in pattern is not allowed")
+    parsed_pattern = pattern.split("%", 1)
+    words = s if type(s) == "list" else _mkstrip(s).split(" ")
+    if len(parsed_pattern) == 1:
+        out_words = [ replacement if x == pattern else x for x in words]
+    else:
+        parsed_replacement = replacement.split("%", 1)
+        out_words = [__mkpatsubst_word(parsed_pattern, parsed_replacement, x) for x in words]
+    return out_words if type(s) == "list" else " ".join(out_words)
+
+
+def _mkstrip(s):
+    """Emulates Make's strip.
+
+    That is, removes string's leading and trailing whitespace characters and
+    replaces any sequence of whitespace characters with with a single space.
+    """
+    result = ""
+    was_space = False
+    for ch in s.strip().elems():
+        is_space = ch.isspace()
+        if not is_space:
+            if was_space:
+                result += " "
+            result += ch
+        was_space = is_space
+    return result
+
+def _mksubst(old, new, s):
+    """Emulates Make's subst.
+
+    Replaces each occurence of 'old' with 'new'.
+    If 's' is a list, applies substitution to each item.
+    """
+    if type(s) == "list":
+        return [e.replace(old, new) for e in s]
+    return s.replace(old, new)
+
+
 def __get_options():
     """Returns struct containing runtime global settings."""
     settings = dict(
@@ -478,7 +539,10 @@
     indirect = _indirect,
     mkinfo = _mkinfo,
     mkerror = _mkerror,
+    mkpatsubst = _mkpatsubst,
     mkwarning = _mkwarning,
+    mkstrip = _mkstrip,
+    mksubst = _mksubst,
     printvars = _printvars,
     product_configuration = _product_configuration,
     require_artifacts_in_path = _require_artifacts_in_path,
diff --git a/core/soong_config.mk b/core/soong_config.mk
index ec67560..1d94661 100644
--- a/core/soong_config.mk
+++ b/core/soong_config.mk
@@ -37,6 +37,7 @@
 $(call add_json_bool, Allow_missing_dependencies,        $(filter true,$(ALLOW_MISSING_DEPENDENCIES)))
 $(call add_json_bool, Unbundled_build,                   $(TARGET_BUILD_UNBUNDLED))
 $(call add_json_bool, Unbundled_build_apps,              $(TARGET_BUILD_APPS))
+$(call add_json_bool, Unbundled_build_image,             $(TARGET_BUILD_UNBUNDLED_IMAGE))
 $(call add_json_bool, Always_use_prebuilt_sdks,          $(TARGET_BUILD_USE_PREBUILT_SDKS))
 $(call add_json_bool, Skip_boot_jars_check,              $(SKIP_BOOT_JARS_CHECK))
 
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 6ba86de..8e6c306 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -241,7 +241,7 @@
     #  It must be of the form "YYYY-MM-DD" on production devices.
     #  It must match one of the Android Security Patch Level strings of the Public Security Bulletins.
     #  If there is no $PLATFORM_SECURITY_PATCH set, keep it empty.
-      PLATFORM_SECURITY_PATCH := 2021-06-05
+      PLATFORM_SECURITY_PATCH := 2021-07-05
 endif
 .KATI_READONLY := PLATFORM_SECURITY_PATCH
 
diff --git a/envsetup.sh b/envsetup.sh
index 4f9440e..77b2247 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -1871,6 +1871,16 @@
     fi
 }
 
+# Source necessary setup scripts needed to run the build with Remote Execution.
+function source_rbe() {
+    local T=$(gettop)
+
+    if [[ "x$USE_RBE" != "x" && "$USE_RBE" != "false" ]]; then
+        . $T/build/make/rbesetup.sh --skip-envsetup
+    fi
+}
+
 validate_current_shell
 source_vendorsetup
+source_rbe
 addcompletions
diff --git a/rbesetup.sh b/rbesetup.sh
index ec39e6e..3b0e7cf 100644
--- a/rbesetup.sh
+++ b/rbesetup.sh
@@ -24,8 +24,11 @@
 }
 
 # This function needs to run first as the remaining defining functions may be
-# using the envsetup.sh defined functions.
-_source_env_setup_script || return
+# using the envsetup.sh defined functions. Skip this part if this script is already
+# being invoked from envsetup.sh.
+if [[ "$1" != "--skip-envsetup" ]]; then
+  _source_env_setup_script || return
+fi
 
 # This function prefixes the given command with appropriate variables needed
 # for the build to be executed with RBE.
diff --git a/target/product/base_vendor.mk b/target/product/base_vendor.mk
index b955841..a087f4c 100644
--- a/target/product/base_vendor.mk
+++ b/target/product/base_vendor.mk
@@ -81,3 +81,9 @@
 # /vendor. TODO(b/141648565): Don't install these unless they're needed.
 PRODUCT_PACKAGES += \
     applypatch
+
+# Base modules and settings for the debug ramdisk, which is then packed
+# into a boot-debug.img and a vendor_boot-debug.img.
+PRODUCT_PACKAGES += \
+    adb_debug.prop \
+    userdebug_plat_sepolicy.cil
diff --git a/tests/run.rbc b/tests/run.rbc
index b13f835..4cda180 100644
--- a/tests/run.rbc
+++ b/tests/run.rbc
@@ -1,4 +1,3 @@
-
 # Copyright 2021 Google LLC
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -28,6 +27,22 @@
     if expected != actual:
         fail("Expected %s, got %s" % (expected, actual))
 
+# Unit tests for non-trivial runtime functions
+assert_eq("", rblf.mkstrip(" \n \t    "))
+assert_eq("a b c", rblf.mkstrip("  a b   \n  c \t"))
+
+assert_eq("b1 b2", rblf.mksubst("a", "b", "a1 a2"))
+assert_eq(["b1", "x2"], rblf.mksubst("a", "b", ["a1", "x2"]))
+
+assert_eq("ABcdYZ", rblf.mkpatsubst("ab%yz", "AB%YZ", "abcdyz"))
+assert_eq("bcz", rblf.mkpatsubst("a%z", "A%Z", "bcz"))
+assert_eq(["Ay", "Az"], rblf.mkpatsubst("a%", "A%", ["ay", "az"]))
+assert_eq("AcZ bcz", rblf.mkpatsubst("a%z", "A%Z", "acz  bcz"))
+assert_eq("Abcd", rblf.mkpatsubst("a%", "A%", "abcd"))
+assert_eq("abcZ", rblf.mkpatsubst("%z", "%Z", "abcz"))
+assert_eq("azx b", rblf.mkpatsubst("az", "AZ", "azx  b"))
+assert_eq(["azx", "b"], rblf.mkpatsubst("az", "AZ", ["azx", "b"]))
+assert_eq("ABC", rblf.mkpatsubst("abc", "ABC", "abc"))
 
 globals, config = rblf.product_configuration("test/device", init)
 assert_eq(
diff --git a/tools/fs_config/Android.mk b/tools/fs_config/Android.mk
index 10d25e0..63cb4eb 100644
--- a/tools/fs_config/Android.mk
+++ b/tools/fs_config/Android.mk
@@ -27,7 +27,22 @@
 system_android_filesystem_config := system/core/libcutils/include/private/android_filesystem_config.h
 system_capability_header := bionic/libc/kernel/uapi/linux/capability.h
 
-# List of supported vendor, oem, odm, vendor_dlkm, odm_dlkm, product and system_ext Partitions
+# Use snapshots if exist
+vendor_android_filesystem_config := $(strip \
+  $(if $(filter-out current,$(BOARD_VNDK_VERSION)), \
+    $(SOONG_VENDOR_$(BOARD_VNDK_VERSION)_SNAPSHOT_DIR)/include/$(system_android_filesystem_config)))
+ifeq (,$(wildcard $(vendor_android_filesystem_config)))
+vendor_android_filesystem_config := $(system_android_filesystem_config)
+endif
+
+vendor_capability_header := $(strip \
+  $(if $(filter-out current,$(BOARD_VNDK_VERSION)), \
+    $(SOONG_VENDOR_$(BOARD_VNDK_VERSION)_SNAPSHOT_DIR)/include/$(system_capability_header)))
+ifeq (,$(wildcard $(vendor_capability_header)))
+vendor_capability_header := $(system_capability_header)
+endif
+
+# List of supported vendor, oem, odm, vendor_dlkm and odm_dlkm Partitions
 fs_config_generate_extra_partition_list := $(strip \
   $(if $(BOARD_USES_VENDORIMAGE)$(BOARD_VENDORIMAGE_FILE_SYSTEM_TYPE),vendor) \
   $(if $(BOARD_USES_OEMIMAGE)$(BOARD_OEMIMAGE_FILE_SYSTEM_TYPE),oem) \
@@ -206,10 +221,10 @@
 LOCAL_INSTALLED_MODULE_STEM := fs_config_dirs
 LOCAL_MODULE_PATH := $(TARGET_OUT_VENDOR)/etc
 include $(BUILD_SYSTEM)/base_rules.mk
-$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_FS_HDR := $(system_android_filesystem_config)
-$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_CAP_HDR := $(system_capability_header)
+$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_FS_HDR := $(vendor_android_filesystem_config)
+$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_CAP_HDR := $(vendor_capability_header)
 $(LOCAL_BUILT_MODULE): PRIVATE_TARGET_FS_CONFIG_GEN := $(TARGET_FS_CONFIG_GEN)
-$(LOCAL_BUILT_MODULE): $(LOCAL_PATH)/fs_config_generator.py $(TARGET_FS_CONFIG_GEN) $(system_android_filesystem_config) $(system_capability_header)
+$(LOCAL_BUILT_MODULE): $(LOCAL_PATH)/fs_config_generator.py $(TARGET_FS_CONFIG_GEN) $(vendor_android_filesystem_config) $(vendor_capability_header)
 	@mkdir -p $(dir $@)
 	$< fsconfig \
 	   --aid-header $(PRIVATE_ANDROID_FS_HDR) \
@@ -232,10 +247,10 @@
 LOCAL_INSTALLED_MODULE_STEM := fs_config_files
 LOCAL_MODULE_PATH := $(TARGET_OUT_VENDOR)/etc
 include $(BUILD_SYSTEM)/base_rules.mk
-$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_FS_HDR := $(system_android_filesystem_config)
-$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_CAP_HDR := $(system_capability_header)
+$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_FS_HDR := $(vendor_android_filesystem_config)
+$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_CAP_HDR := $(vendor_capability_header)
 $(LOCAL_BUILT_MODULE): PRIVATE_TARGET_FS_CONFIG_GEN := $(TARGET_FS_CONFIG_GEN)
-$(LOCAL_BUILT_MODULE): $(LOCAL_PATH)/fs_config_generator.py $(TARGET_FS_CONFIG_GEN) $(system_android_filesystem_config) $(system_capability_header)
+$(LOCAL_BUILT_MODULE): $(LOCAL_PATH)/fs_config_generator.py $(TARGET_FS_CONFIG_GEN) $(vendor_android_filesystem_config) $(vendor_capability_header)
 	@mkdir -p $(dir $@)
 	$< fsconfig \
 	   --aid-header $(PRIVATE_ANDROID_FS_HDR) \
@@ -316,10 +331,10 @@
 LOCAL_INSTALLED_MODULE_STEM := fs_config_dirs
 LOCAL_MODULE_PATH := $(TARGET_OUT_ODM)/etc
 include $(BUILD_SYSTEM)/base_rules.mk
-$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_FS_HDR := $(system_android_filesystem_config)
-$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_CAP_HDR := $(system_capability_header)
+$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_FS_HDR := $(vendor_android_filesystem_config)
+$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_CAP_HDR := $(vendor_capability_header)
 $(LOCAL_BUILT_MODULE): PRIVATE_TARGET_FS_CONFIG_GEN := $(TARGET_FS_CONFIG_GEN)
-$(LOCAL_BUILT_MODULE): $(LOCAL_PATH)/fs_config_generator.py $(TARGET_FS_CONFIG_GEN) $(system_android_filesystem_config) $(system_capability_header)
+$(LOCAL_BUILT_MODULE): $(LOCAL_PATH)/fs_config_generator.py $(TARGET_FS_CONFIG_GEN) $(vendor_android_filesystem_config) $(vendor_capability_header)
 	@mkdir -p $(dir $@)
 	$< fsconfig \
 	   --aid-header $(PRIVATE_ANDROID_FS_HDR) \
@@ -342,10 +357,10 @@
 LOCAL_INSTALLED_MODULE_STEM := fs_config_files
 LOCAL_MODULE_PATH := $(TARGET_OUT_ODM)/etc
 include $(BUILD_SYSTEM)/base_rules.mk
-$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_FS_HDR := $(system_android_filesystem_config)
-$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_CAP_HDR := $(system_capability_header)
+$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_FS_HDR := $(vendor_android_filesystem_config)
+$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_CAP_HDR := $(vendor_capability_header)
 $(LOCAL_BUILT_MODULE): PRIVATE_TARGET_FS_CONFIG_GEN := $(TARGET_FS_CONFIG_GEN)
-$(LOCAL_BUILT_MODULE): $(LOCAL_PATH)/fs_config_generator.py $(TARGET_FS_CONFIG_GEN) $(system_android_filesystem_config) $(system_capability_header)
+$(LOCAL_BUILT_MODULE): $(LOCAL_PATH)/fs_config_generator.py $(TARGET_FS_CONFIG_GEN) $(vendor_android_filesystem_config) $(vendor_capability_header)
 	@mkdir -p $(dir $@)
 	$< fsconfig \
 	   --aid-header $(PRIVATE_ANDROID_FS_HDR) \
@@ -371,10 +386,10 @@
 LOCAL_INSTALLED_MODULE_STEM := fs_config_dirs
 LOCAL_MODULE_PATH := $(TARGET_OUT_VENDOR_DLKM)/etc
 include $(BUILD_SYSTEM)/base_rules.mk
-$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_FS_HDR := $(system_android_filesystem_config)
-$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_CAP_HDR := $(system_capability_header)
+$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_FS_HDR := $(vendor_android_filesystem_config)
+$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_CAP_HDR := $(vendor_capability_header)
 $(LOCAL_BUILT_MODULE): PRIVATE_TARGET_FS_CONFIG_GEN := $(TARGET_FS_CONFIG_GEN)
-$(LOCAL_BUILT_MODULE): $(LOCAL_PATH)/fs_config_generator.py $(TARGET_FS_CONFIG_GEN) $(system_android_filesystem_config) $(system_capability_header)
+$(LOCAL_BUILT_MODULE): $(LOCAL_PATH)/fs_config_generator.py $(TARGET_FS_CONFIG_GEN) $(vendor_android_filesystem_config) $(vendor_capability_header)
 	@mkdir -p $(dir $@)
 	$< fsconfig \
 	   --aid-header $(PRIVATE_ANDROID_FS_HDR) \
@@ -397,10 +412,10 @@
 LOCAL_INSTALLED_MODULE_STEM := fs_config_files
 LOCAL_MODULE_PATH := $(TARGET_OUT_VENDOR_DLKM)/etc
 include $(BUILD_SYSTEM)/base_rules.mk
-$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_FS_HDR := $(system_android_filesystem_config)
-$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_CAP_HDR := $(system_capability_header)
+$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_FS_HDR := $(vendor_android_filesystem_config)
+$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_CAP_HDR := $(vendor_capability_header)
 $(LOCAL_BUILT_MODULE): PRIVATE_TARGET_FS_CONFIG_GEN := $(TARGET_FS_CONFIG_GEN)
-$(LOCAL_BUILT_MODULE): $(LOCAL_PATH)/fs_config_generator.py $(TARGET_FS_CONFIG_GEN) $(system_android_filesystem_config) $(system_capability_header)
+$(LOCAL_BUILT_MODULE): $(LOCAL_PATH)/fs_config_generator.py $(TARGET_FS_CONFIG_GEN) $(vendor_android_filesystem_config) $(vendor_capability_header)
 	@mkdir -p $(dir $@)
 	$< fsconfig \
 	   --aid-header $(PRIVATE_ANDROID_FS_HDR) \
@@ -426,10 +441,10 @@
 LOCAL_INSTALLED_MODULE_STEM := fs_config_dirs
 LOCAL_MODULE_PATH := $(TARGET_OUT_ODM_DLKM)/etc
 include $(BUILD_SYSTEM)/base_rules.mk
-$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_FS_HDR := $(system_android_filesystem_config)
-$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_CAP_HDR := $(system_capability_header)
+$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_FS_HDR := $(vendor_android_filesystem_config)
+$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_CAP_HDR := $(vendor_capability_header)
 $(LOCAL_BUILT_MODULE): PRIVATE_TARGET_FS_CONFIG_GEN := $(TARGET_FS_CONFIG_GEN)
-$(LOCAL_BUILT_MODULE): $(LOCAL_PATH)/fs_config_generator.py $(TARGET_FS_CONFIG_GEN) $(system_android_filesystem_config) $(system_capability_header)
+$(LOCAL_BUILT_MODULE): $(LOCAL_PATH)/fs_config_generator.py $(TARGET_FS_CONFIG_GEN) $(vendor_android_filesystem_config) $(vendor_capability_header)
 	@mkdir -p $(dir $@)
 	$< fsconfig \
 	   --aid-header $(PRIVATE_ANDROID_FS_HDR) \
@@ -452,10 +467,10 @@
 LOCAL_INSTALLED_MODULE_STEM := fs_config_files
 LOCAL_MODULE_PATH := $(TARGET_OUT_ODM_DLKM)/etc
 include $(BUILD_SYSTEM)/base_rules.mk
-$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_FS_HDR := $(system_android_filesystem_config)
-$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_CAP_HDR := $(system_capability_header)
+$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_FS_HDR := $(vendor_android_filesystem_config)
+$(LOCAL_BUILT_MODULE): PRIVATE_ANDROID_CAP_HDR := $(vendor_capability_header)
 $(LOCAL_BUILT_MODULE): PRIVATE_TARGET_FS_CONFIG_GEN := $(TARGET_FS_CONFIG_GEN)
-$(LOCAL_BUILT_MODULE): $(LOCAL_PATH)/fs_config_generator.py $(TARGET_FS_CONFIG_GEN) $(system_android_filesystem_config) $(system_capability_header)
+$(LOCAL_BUILT_MODULE): $(LOCAL_PATH)/fs_config_generator.py $(TARGET_FS_CONFIG_GEN) $(vendor_android_filesystem_config) $(vendor_capability_header)
 	@mkdir -p $(dir $@)
 	$< fsconfig \
 	   --aid-header $(PRIVATE_ANDROID_FS_HDR) \
diff --git a/tools/releasetools/add_img_to_target_files.py b/tools/releasetools/add_img_to_target_files.py
index 28a2f5a..b8c812d 100644
--- a/tools/releasetools/add_img_to_target_files.py
+++ b/tools/releasetools/add_img_to_target_files.py
@@ -706,6 +706,31 @@
       common.ZipWrite(output_zip, output_file, arc_name)
 
 
+def AddVbmetaDigest(output_zip):
+  """Write the vbmeta digest to the output dir and zipfile."""
+
+  # Calculate the vbmeta digest and put the result in to META/
+  boot_images = OPTIONS.info_dict.get("boot_images")
+  # Disable the digest calculation if the target_file is used as a container
+  # for boot images.
+  boot_container = boot_images and len(boot_images.split()) >= 2
+  if (OPTIONS.info_dict.get("avb_enable") == "true" and not boot_container and
+      OPTIONS.info_dict.get("avb_building_vbmeta_image") == "true"):
+    avbtool = OPTIONS.info_dict["avb_avbtool"]
+    digest = verity_utils.CalculateVbmetaDigest(OPTIONS.input_tmp, avbtool)
+    vbmeta_digest_txt = os.path.join(OPTIONS.input_tmp, "META",
+                                     "vbmeta_digest.txt")
+    with open(vbmeta_digest_txt, 'w') as f:
+      f.write(digest)
+    # writes to the output zipfile
+    if output_zip:
+      arc_name = "META/vbmeta_digest.txt"
+      if arc_name in output_zip.namelist():
+        OPTIONS.replace_updated_files_list.append(arc_name)
+      else:
+        common.ZipWriteStr(output_zip, arc_name, digest)
+
+
 def AddImagesToTargetFiles(filename):
   """Creates and adds images (boot/recovery/system/...) to a target_files.zip.
 
@@ -959,19 +984,7 @@
     with open(pack_radioimages_txt) as f:
       AddPackRadioImages(output_zip, f.readlines())
 
-  # Calculate the vbmeta digest and put the result in to META/
-  boot_images = OPTIONS.info_dict.get("boot_images")
-  # Disable the digest calculation if the target_file is used as a container
-  # for boot images.
-  boot_container = boot_images and len(boot_images.split()) >= 2
-  if (OPTIONS.info_dict.get("avb_enable") == "true" and not boot_container and
-      OPTIONS.info_dict.get("avb_building_vbmeta_image") == "true"):
-    avbtool = OPTIONS.info_dict["avb_avbtool"]
-    digest = verity_utils.CalculateVbmetaDigest(OPTIONS.input_tmp, avbtool)
-    vbmeta_digest_txt = os.path.join(OPTIONS.input_tmp, "META",
-                                     "vbmeta_digest.txt")
-    with open(vbmeta_digest_txt, 'w') as f:
-      f.write(digest)
+  AddVbmetaDigest(output_zip)
 
   if output_zip:
     common.ZipClose(output_zip)
diff --git a/tools/zipalign/ZipEntry.cpp b/tools/zipalign/ZipEntry.cpp
index 5233f0a..fcad96c 100644
--- a/tools/zipalign/ZipEntry.cpp
+++ b/tools/zipalign/ZipEntry.cpp
@@ -87,7 +87,7 @@
     }
 
     /*
-     * Sanity-check the LFH.  Note that this will fail if the "kUsesDataDescr"
+     * Check the LFH.  Note that this will fail if the "kUsesDataDescr"
      * flag is set, because the LFH is incomplete.  (Not a problem, since we
      * prefer the CDE values.)
      */