Merge changes Ib2a4a208,Ic8235912

* changes:
  Set allow list for generic ramdisk
  Add a "relaxed" mode for require-artifacts-in-path

core/artifact_path_requirements.mk

@@ -35,7 +35,9 @@ $(foreach makefile,$(ARTIFACT_PATH_REQUIREMENT_PRODUCTS),\
     $(makefile) produces files outside its artifact path requirement. \
     Allowed paths are $(subst $(space),$(comma)$(space),$(addsuffix *,$(requirements)))) \
   $(eval unused_allowed := $(filter-out $(files),$(allowed_patterns))) \
-  $(call maybe-print-list-and-error,$(unused_allowed),$(makefile) includes redundant allowed entries in its artifact path requirement.) \
+  $(if $(PRODUCTS.$(makefile).ARTIFACT_PATH_REQUIREMENT_IS_RELAXED),, \
+    $(call maybe-print-list-and-error,$(unused_allowed),$(makefile) includes redundant allowed entries in its artifact path requirement.) \
+  ) \
   $(eval ### Optionally verify that nothing else produces files inside this artifact path requirement.) \
   $(eval extra_files := $(filter-out $(files) $(HOST_OUT)/%,$(product_target_FILES))) \
   $(eval files_in_requirement := $(filter $(path_patterns),$(extra_files))) \

core/product.mk

@@ -463,6 +463,13 @@ define require-artifacts-in-path
     $(sort $(ARTIFACT_PATH_REQUIREMENT_PRODUCTS) $(current_mk)))
 endef
 
+# Like require-artifacts-in-path, but does not require all allow-list entries to
+# have an effect.
+define require-artifacts-in-path-relaxed
+  $(require-artifacts-in-path) \
+  $(eval PRODUCTS.$(current_mk).ARTIFACT_PATH_REQUIREMENT_IS_RELAXED := true)
+endef
+
 # Makes including non-existent modules in PRODUCT_PACKAGES an error.
 # $(1): list of non-existent modules to allow.
 define enforce-product-packages-exist

target/board/generic_arm64/device.mk

@@ -32,3 +32,5 @@ endif
 
 PRODUCT_BUILD_VENDOR_BOOT_IMAGE := false
 PRODUCT_BUILD_RECOVERY_IMAGE := false
+
+$(call inherit-product, $(SRC_TARGET_DIR)/product/generic_ramdisk.mk)

target/product/generic_ramdisk.mk

@@ -0,0 +1,42 @@
+#
+# 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.
+#
+
+# This makefile installs contents of the generic ramdisk.
+# Inherit from this makefile to declare that this product uses generic ramdisk.
+# This makefile checks that other makefiles must not install things to the
+# ramdisk.
+
+PRODUCT_NAME := generic_ramdisk
+PRODUCT_BRAND := generic
+
+# Ramdisk
+PRODUCT_PACKAGES += \
+    init_first_stage \
+
+# Debug ramdisk
+PRODUCT_PACKAGES += \
+    userdebug_plat_sepolicy.cil \
+
+_my_paths := \
+    $(TARGET_COPY_OUT_RAMDISK) \
+    $(TARGET_COPY_OUT_DEBUG_RAMDISK) \
+    system/usr/share/zoneinfo/tz_version \
+    system/usr/share/zoneinfo/tzdata \
+
+# We use the "relaxed" version here because tzdata / tz_version is only produced
+# by this makefile on a subset of devices.
+# TODO: remove this
+$(call require-artifacts-in-path-relaxed, $(_my_paths), )