########
dir_guard=@mkdir -p $(@D)

########
define add_distro
# Avoid nested distro section
ifdef DISTRO_NAME
$$(error Nested distro section is not allowed! Currently in "$$(DISTRO_NAME)")
endif

undefine DISTRO_NAME
undefine PACKAGE_MANAGER

$$(eval $$(call stack_include,$1/distro.mk))

ifndef DISTRO_NAME
$$(error DISTRO_NAME not provided)
endif
ifndef PACKAGE_MANAGER
$$(error PACKAGE_MANAGER not provided)
endif

undefine DISTRO_NAME
undefine PACKAGE_MANAGER
endef

########
define add_distro_release
ifndef DISTRO_NAME
$$(error Not within distro section)
endif
ifdef RELEASE_NAME
$$(error Nested distro release section is not allowed! Currently in "$$(DISTRO_NAME) $$(RELEASE_NAME)")
endif

undefine RELEASE_NAME

$$(eval $$(call stack_include,$1/release.mk))

ifndef RELEASE_NAME
$$(error RELEASE_NAME not provided)
endif

$$(DISTRO_NAME)_$$(RELEASE_NAME)_RECEIPES :=

undefine RELEASE_NAME
endef

########
define add_receipe

ifndef RELEASE_NAME
$$(error Not within distro release section)
endif

# Cleanup and register new receipe
undefine RECEIPE_NAME
undefine COMPRESSION
undefine EXTENDS

$$(eval $$(call stack_include,$1/receipe.mk))

# Check name
ifndef RECEIPE_NAME
$$(error RECEIPE_NAME not defined)
endif
# Check compression method
ifeq ($$(COMPRESSION),zstd)
COMPRESSION_SUFFIX := tar.zst
COMPRESSION_CMD := tar --use-compress-program=zstd -cf "$$$$$$$${OUTPUT_ARCHIVE}" -C "$$$$$$$${ROOTFS_DIR}" .
else
$$(error Unsupported compression mode)
endif

# Define global references
$$(DISTRO_NAME)_$$(RELEASE_NAME)_RECEIPES := $$($$(DISTRO_NAME)_$$(RELEASE_NAME)_RECEIPES) $$(RECEIPE_NAME)
$$(DISTRO_NAME)_$$(RELEASE_NAME)_$$(RECEIPE_NAME)_DIR := $1
$$(DISTRO_NAME)_$$(RELEASE_NAME)_$$(RECEIPE_NAME)_ARTIFACT := $(DIST_DIR)/$$(DISTRO_NAME)/$$(RELEASE_NAME)/$$(DISTRO_NAME)-$$(RELEASE_NAME)-$$(RECEIPE_NAME)-rootfs.$$(COMPRESSION_SUFFIX)
ROOTFS_TARGETS += $$(DISTRO_NAME)-$$(RELEASE_NAME)-$$(RECEIPE_NAME)-rootfs

# Populate workdir
# Ensure prereq exists
define check_receipe_exist
ifndef $$(DISTRO_NAME)_$$(RELEASE_NAME)_$$(1)_DIR
$$$$(error $$(RECEIPE_NAME) requires $$(1), but it is missing)
endif
endef
$$(foreach dep,$$(EXTENDS),$$(eval $$(call check_receipe_exist,$$(dep))))
undefine check_receipe_exist
# Does not contains itself, may be referenced by other receipes
$$(DISTRO_NAME)_$$(RELEASE_NAME)_$$(RECEIPE_NAME)_DEPS := $$(foreach depname,$$(EXTENDS),$$($$(DISTRO_NAME)_$$(RELEASE_NAME)_$$(depname)_DEPS) $$($$(DISTRO_NAME)_$$(RELEASE_NAME)_$$(depname)_DIR))
# Itself is listed for constructing current receipe
$$(DISTRO_NAME)_$$(RELEASE_NAME)_$$(RECEIPE_NAME)_DEPS_FULL := $$($$(DISTRO_NAME)_$$(RELEASE_NAME)_$$(RECEIPE_NAME)_DEPS) $$($$(DISTRO_NAME)_$$(RELEASE_NAME)_$$(RECEIPE_NAME)_DIR)
$$(DISTRO_NAME)_$$(RELEASE_NAME)_$$(RECEIPE_NAME)_DEPS_FULL := $$(foreach dep,$$($$(DISTRO_NAME)_$$(RELEASE_NAME)_$$(RECEIPE_NAME)_DEPS_FULL),$$(dep)/)
define GENERATE_SYNC_TARGET
$(STAGING_DIR)/$$(DISTRO_NAME)/$$(RELEASE_NAME)/receipes/$$(RECEIPE_NAME): $$$$(foreach dep,$$$$($$(DISTRO_NAME)_$$(RELEASE_NAME)_$$(RECEIPE_NAME)_DEPS_FULL),$$$$(shell find -L $$$$(dep) -type f,d | tr '\n' ' '))
	$$$$(dir_guard)
	$(ECHOCTL)rm -rf "$$$$@"
	@# Not preserving modification time, aka -t
	$(ECHOCTL)rsync -rLpgoD --exclude receipe.mk $$($$(DISTRO_NAME)_$$(RELEASE_NAME)_$$(RECEIPE_NAME)_DEPS_FULL) $$$$@
endef
# Introduce one level of indirection to evaluate receipes ahead of time
$$(eval $$(GENERATE_SYNC_TARGET))

# Define entry target
.PHONY: $$(DISTRO_NAME)-$$(RELEASE_NAME)-$$(RECEIPE_NAME)-rootfs
$$(DISTRO_NAME)-$$(RELEASE_NAME)-$$(RECEIPE_NAME)-rootfs: $$($$(DISTRO_NAME)_$$(RELEASE_NAME)_$$(RECEIPE_NAME)_ARTIFACT)
define GENERATE_TAR_TARGET
$$($$(DISTRO_NAME)_$$(RELEASE_NAME)_$$(RECEIPE_NAME)_ARTIFACT): $(STAGING_DIR)/$$(DISTRO_NAME)/$$(RELEASE_NAME)/receipes/$$(RECEIPE_NAME)
	$$$$(dir_guard)
	$(ECHOCTL)$(CONTAINER_CMD) run --rm \
		-v $(ROOT_DIR)/tools:/image-builder/tools:ro \
		-v $$$$<:/image-builder/receipe:ro \
		-v $$$$(dir $$$$@):/image-builder/output \
		$(CONTAINER_IMAGE_TAG) \
		/bin/sh -c ' \
		mkdir /tmp/rootfs && \
		cd /image-builder/tools && \
		LOG_LEVEL=$(LOG_LEVEL) ./build_rootfs.sh -i /image-builder/receipe -o /tmp/rootfs -p $$(PACKAGE_MANAGER) && \
		export OUTPUT_ARCHIVE=/image-builder/output/$$$$(notdir $$$$@) && \
		export ROOTFS_DIR=/tmp/rootfs && \
		$$(COMPRESSION_CMD)'
endef
$$(eval $$(GENERATE_TAR_TARGET))


# Reset registers again
undefine GENERATE_TAR_TARGET
undefine EXTENDS
undefine COMPRESSION_CMD
undefine COMPRESSION_SUFFIX
undefine COMPRESSION
undefine RECEIPE_NAME

endef

########
define add_device
ifndef RELEASE_NAME
$$(error Not within distro release section)
endif
ifdef DEVICE_NAME
$$(error Nested device section is not allowed! Currently in "$$(DISTRO_NAME) $$(RELEASE_NAME) $$(DEVICE_NAME)")
endif

undefine DEVICE_NAME

$$(eval $$(call stack_include,$1/device.mk))

ifndef DEVICE_NAME
$$(error DEVICE_NAME not provided)
endif

undefine DEVICE_NAME
endef


########
define add_device_profile
ifndef DEVICE_NAME
$$(error Not within device section)
endif
ifdef PROFILE_NAME
$$(error Nested profile section is not allowed! Currently in "$$(DISTRO_NAME) $$(RELEASE_NAME) $$(DEVICE_NAME)" $$(PROFILE_NAME))
endif

undefine PROFILE_NAME

$$(eval $$(call stack_include,$1/profile.mk))

ifndef PROFILE_NAME
$$(error PROFILE_NAME not provided)
endif

BSP_PROFILE_DIR := $1

define GENERATE_RECEIPE_PROFILE_MATRIX
BSP_TARGETS += $$(DISTRO_NAME)-$$(RELEASE_NAME)-$$(1)-$$(DEVICE_NAME)-$$(PROFILE_NAME)
$$(DISTRO_NAME)-$$(RELEASE_NAME)-$$(1)-$$(DEVICE_NAME)_PROFILES += $$(PROFILE_NAME)

.PHONY: $$(DISTRO_NAME)-$$(RELEASE_NAME)-$$(1)-$$(DEVICE_NAME)-$$(PROFILE_NAME)
$$(DISTRO_NAME)-$$(RELEASE_NAME)-$$(1)-$$(DEVICE_NAME)-$$(PROFILE_NAME): $(STAGING_DIR)/$$(DISTRO_NAME)/$$(RELEASE_NAME)/bsp/$$(DEVICE_NAME)/$$(PROFILE_NAME)/$$(1) $$($$(DISTRO_NAME)_$$(RELEASE_NAME)_$$(1)_ARTIFACT)
	@mkdir -p $(DIST_DIR)/$$(DISTRO_NAME)/$$(RELEASE_NAME)/$$(DEVICE_NAME)
	$(ECHOCTL)$(CONTAINER_CMD) run --privileged --rm \
		-v $(ROOT_DIR)/tools:/image-builder/tools:ro \
		-v $$$$<:/image-builder/receipe:ro \
		-v $$($$(DISTRO_NAME)_$$(RELEASE_NAME)_$$(1)_ARTIFACT):/image-builder/$$(notdir $$($$(DISTRO_NAME)_$$(RELEASE_NAME)_$$(1)_ARTIFACT)):ro \
		-v $(DIST_DIR)/$$(DISTRO_NAME)/$$(RELEASE_NAME)/$$(DEVICE_NAME):/image-builder/output \
		$(CONTAINER_IMAGE_TAG) \
		/bin/sh -c 'cd /image-builder/tools && \
		LOG_LEVEL=$(LOG_LEVEL) ./build_bsp.sh -i /image-builder/receipe -s /image-builder/$$(notdir $$($$(DISTRO_NAME)_$$(RELEASE_NAME)_$$(1)_ARTIFACT)) -o /image-builder/output/$$(DISTRO_NAME)-$$(RELEASE_NAME)-$$(1)-$$(DEVICE_NAME)-$$(PROFILE_NAME) -p $$(PACKAGE_MANAGER)'

ifneq ($$$$(wildcard $$(BSP_PROFILE_DIR)/extensions/$$(1)/.),)
# corresponding extension exists
BSP_PROFILE_EXTENSION_DIR := $$(BSP_PROFILE_DIR)/extensions/$$(1)
endif

.PHONY: $(STAGING_DIR)/$$(DISTRO_NAME)/$$(RELEASE_NAME)/bsp/$$(DEVICE_NAME)/$$(PROFILE_NAME)/$$(1)
$(STAGING_DIR)/$$(DISTRO_NAME)/$$(RELEASE_NAME)/bsp/$$(DEVICE_NAME)/$$(PROFILE_NAME)/$$(1): $$$$(BSP_PROFILE_DIR) $$$$(BSP_PROFILE_EXTENSION_DIR)
	$$$$(dir_guard)
	$(ECHOCTL)rm -rf "$$$$@"
	@# Not preserving modification time, aka -t
	$(ECHOCTL)rsync -rLpgoD --exclude profile.mk --exclude extensions $$$$(foreach dep,$$$$+,$$$$(dep)/) $$$$@

undefine BSP_PROFILE_EXTENSION_DIR
endef
$$(foreach receipe,$$($$(DISTRO_NAME)_$$(RELEASE_NAME)_RECEIPES),$$(eval $$(call GENERATE_RECEIPE_PROFILE_MATRIX,$$(receipe))))

undefine PROFILE_NAME
undefine BSP_PROFILE_DIR
undefine GENERATE_RECEIPE_PROFILE_MATRIX
endef