# SPDX-License-Identifier: GPL-3.0+

BOARD ?= devkit
TYPE ?= latest
DIST ?= buster+ci

SHELL := /bin/bash

# Get a variable from the board config
# $1 : Variable name to get the value for
define get_board_var
$(shell pureos_board=$(BOARD); . conf/board; echo $$$1)
endef

STAMPFILE := tmp/$(BOARD).img.stamp
IMAGES := $(BOARD).img
ifeq ($(call get_board_var,want_boot_image),1)
  IMAGES += $(BOARD)-boot.img
endif
COMPRESSED := $(addsuffix .xz,$(IMAGES))
CHECKSUM := sha256sums
DEPS=\
  build-image   \
  root.sh       \
  conf/board    \
  conf/packages \
  $(NULL)

SHELLCHECK_SCRIPTS=\
  ./build-image             \
  build/build_kernel_deb.sh \
  $(NULL)

all: $(COMPRESSED)

$(IMAGES): $(STAMPFILE)

# Use an order-only dependency to prevent rebuilding $(STAMPFILE) every time
# local.sh-link is out of date (it is always out of date because of .PHONY).
$(STAMPFILE): | local.sh-link

$(STAMPFILE): $(DEPS)
	./build-image -b $(BOARD) -T $(TYPE) -d $(DIST)
	touch $@

%.img.xz: %.img
	xz -T0 --stdout $< > $@.tmp
	mv $@.tmp $@

$(CHECKSUM): $(COMPRESSED)
	sha256sum $(COMPRESSED) > $@.tmp
	mv $@.tmp $@

clean:
	rm -rf files/ tmp/ $(IMAGES) $(COMPRESSED) $(CHECKSUM) *.tmp

check:
	shellcheck -x $(SHELLCHECK_SCRIPTS)
	bash -n root.sh

publish: $(CHECKSUM)
	bin/sign-checksum
	bin/publish -T ${TYPE}

local.sh-link:
	if test -e local.sh; then \
		mkdir -p files; \
		ln -sf ../local.sh files; \
	fi

.PHONY: all publish local.sh-link