core/tasks/platform_availability_check.mk

#
# 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.
#

# Check whether there is any module that isn't available for platform
# is installed to the platform.

# Skip for unbundled builds that don't produce a platform image.
ifeq (,$(TARGET_BUILD_UNBUNDLED))

# Filter FAKE and NON_INSTALLABLE modules out and then collect those are not
# available for platform
_modules_not_available_for_platform := \
$(strip $(foreach m,$(product_MODULES),\
  $(if $(filter-out FAKE,$(ALL_MODULES.$(m).CLASS)),\
    $(if $(ALL_MODULES.$(m).INSTALLED),\
      $(if $(filter true,$(ALL_MODULES.$(m).NOT_AVAILABLE_FOR_PLATFORM)),\
        $(m))))))

ifndef ALLOW_MISSING_DEPENDENCIES
  _violators_with_path := $(foreach m,$(sort $(_modules_not_available_for_platform)),\
    $(m):$(word 1,$(ALL_MODULES.$(m).PATH))\
  )

  $(call maybe-print-list-and-error,$(_violators_with_path),\
Following modules are requested to be installed. But are not available \
for platform because they do not have "//apex_available:platform" or \
they depend on other modules that are not available for platform)

else

# Don't error out immediately when ALLOW_MISSING_DEPENDENCIES is set.
# Instead, add a dependency on a rule that prints the error message.
  define not_available_for_platform_rule
    not_installable_file := $(patsubst $(OUT_DIR)/%,$(OUT_DIR)/NOT_AVAILABLE_FOR_PLATFORM/%,$(1))
    $(1): $$(not_installable_file)
    $$(not_installable_file):
	$(call echo-error,$(2),Module is requested to be installed but is not \
available for platform because it does not have "//apex_available:platform" or \
it depends on other modules that are not available for platform.)
	exit 1
  endef

  $(foreach m,$(_modules_not_available_for_platform),\
    $(foreach i,$(filter-out $(HOST_OUT)/%,$(ALL_MODULES.$(m).INSTALLED)),\
      $(eval $(call not_available_for_platform_rule,$(i),$(m)))))
endif

endif