CONFIG=config.mak

include $(CONFIG)

COV_DIR=$(OUT)coverage/
APP_DIR=$(SRC_DIR)apps/
CC=gcc
SHELL=/bin/bash

CCFLAGS = -Wall -Werror
CCFLAGS += -std=c99 -D_POSIX_C_SOURCE=200809L
CCFLAGS += -I$(SRC_DIR)

CCFLAGS += -I/usr/include/glib-2.0/
LDFLAGS += -lglib-2.0

CCFLAGS += $(CCFLAGS_EXTRA)
LDFLAGS += $(LDFLAGS_EXTRA)

FILTER = $(foreach v,$(2),$(if $(findstring $(1),$(v)),$(v),))

C_SOURCES = $(shell find $(SRC_DIR) -name "*.c")
ALL_OBJS = $(patsubst $(SRC_DIR)%.c, $(OUT)%.o, $(C_SOURCES))
APP_OBJS = $(filter $(OUT)apps/%, $(ALL_OBJS))
TEST_OBJS = $(call FILTER,/tests/, $(ALL_OBJS))
OBJS = $(filter-out $(TEST_OBJS) $(APP_OBJS), $(ALL_OBJS))
APPS = $(patsubst %.o, %, $(APP_OBJS))

.PHONY: all
all: gbdb gbasm tests

.PHONY: gbdb gbasm
gbdb: $(OUT)apps/gbdb
gbasm: $(OUT)apps/gbasm

.PHONY: gbasm-test tests

TESTS = $(patsubst %.o, %, $(filter %/test.o, $(ALL_OBJS)))
tests: $(TESTS)

$(ALL_OBJS): $(CONFIG)

.PHONY: info
info:
	$(info SRC_DIR is ${SRC_DIR})
	$(info OUT is ${OUT})
	$(info C_SOURCES is ${C_SOURCES})
	$(info OBJSs is ${OBJS})
	$(info ALL_OBJS is ${ALL_OBJS})
	$(info APP_OBJS is ${APP_OBJS})
	$(info TEST_OBJS is ${TEST_OBJS})


$(OUT)%.o: $(SRC_DIR)%.c $(CONFIG)
	@echo "    CC   $@"
	$(shell mkdir -p $(@D))
	$(CC) -c $(CCFLAGS) -o $@ $<

objs: $(OBJS)
	$(info OBJS=$(OBJS))

.SECONDEXPANSION:
$(APPS) $(TESTS): $(OBJS) $$@.o
	@echo "    LD   $@"
	@echo "      objs=$^"
	@$(shell mkdir -p $(@D))
	$(CC) $^ $(LDFLAGS) -o $@

.PHONY: check cov-report

define run_tests =
	@for i in $(TESTS); do \
		echo "    TEST $$i"; \
		$$i | sed 's/^/         /'; \
		if [ $${PIPESTATUS[0]} -ne 0 ]; then \
			exit 1; \
		fi; \
	done;
endef

.PHONY: check coverage coverage-report
check: $(TESTS)
	$(run_tests)

COV_BASE=$(COV_DIR)cov_base.info
.PHONY: $(COV_BASE)
$(COV_BASE):
	@mkdir -p $(COV_DIR)
	@lcov -q -c -i -d $(OUT) -o $(COV_BASE)

$(COV_DIR)coverage.info coverage: $(TESTS) $(COV_BASE)
	$(call run_tests)
	@lcov -q -c -d $(OUT) -o $(COV_DIR)results.info -t results
	@lcov -q -a $(COV_DIR)results.info -o $(COV_DIR)coverage.info
	@lcov --summary $(COV_DIR)coverage.info

coverage-report: coverage
	@mkdir -p $(COV_DIR)html/
	@genhtml -q --prefix $(PWD) \
		--output-directory=$(COV_DIR)html \
		$(COV_DIR)coverage.info

.PHONY: clean realclean cov-clean

cov-clean:
	@find $(OUT) \( -iname *.gcno -o -iname *.gcda \) -delete
	@rm -rf $(COV_DIR)

clean: cov-clean
	@rm -f $(ALL_OBJS) $(APPS) $(TESTS)

realclean: clean
	@rm -f $(CONFIG)