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CC ?= cc
PKG_CONFIG ?= pkg-config
PREFIX ?= /usr/local
BINDIR ?= $(PREFIX)/bin
DESTDIR ?=

GIT_HASH := $(shell git rev-parse --short HEAD)
GIT_DATE := $(shell git log -1 --format='%ad' --date='format:%y.%m.%d')
GIT_BRANCH := $(shell git rev-parse --abbrev-ref HEAD)
GIT_REMOTE := $(shell git remote get-url origin)
GIT_TAG := $(shell git describe --tags --exact-match HEAD 2>/dev/null)

VERSION := $(if $(GIT_TAG),$(GIT_TAG),$(GIT_DATE)+$(GIT_HASH)_$(GIT_BRANCH))

TARGET := bin/yapssg
SOURCES := src/Main.c $(wildcard src/*/*.c)
OBJECTS := $(patsubst src/%.c,obj/%.o,$(SOURCES))

CPPFLAGS += -Isrc $(shell $(PKG_CONFIG) --cflags libxml-2.0 luajit)
CFLAGS ?= -O2 -Wall -Wextra -Werror -std=c99
LDLIBS += $(shell $(PKG_CONFIG) --libs libxml-2.0 luajit)

.PHONY: all clean install FORCE

all: $(TARGET)

$(TARGET): $(OBJECTS) | bin
	$(CC) $(LDFLAGS) $(OBJECTS) $(LDLIBS) -o $@

obj/%.o: src/%.c
	mkdir -p $(@D)
	$(CC) $(CPPFLAGS) $(CFLAGS) -MMD -MP -c $< -o $@

obj/Version/Version.o: CPPFLAGS += -DYAPSSG_VERSION=\"$(VERSION)\"
obj/Version/Version.o: FORCE

FORCE:

bin:
	mkdir -p $@

clean:
	rm -rf obj bin

install: $(TARGET)
	install -Dm755 $(TARGET) $(DESTDIR)$(BINDIR)/yapssg

-include $(OBJECTS:.o=.d)