# Compiler and flags
CPPC = gcc
LINKER_FLAGS = -lm
COMMON_CPPC_FLAGS = -Wall -Wextra
CPPC_FLAGS = $(COMMON_CPPC_FLAGS) -s -O3
DEBUG_FLAGS = $(COMMON_CPPC_FLAGS) -ggdb
DEBUG_ASANITIZE = $(DEBUG_FLAGS) -fsanitize=address -fno-omit-frame-pointer


SRC_PATH := src
OBJ_PATH := build/obj
BIN_PATH := build/bin
BIN_NAME := pupes-backup-server


SRC_FILES := $(shell find $(SRC_PATH) -name '*.c')
OBJ_FILES := $(patsubst $(SRC_PATH)/%.c,$(OBJ_PATH)/%.o,$(SRC_FILES))


all: make-build-dir $(BIN_PATH)/$(BIN_NAME)


debug: CPPC_FLAGS = $(DEBUG_FLAGS)
debug: make-build-dir $(BIN_PATH)/$(BIN_NAME)

asan: CPPC_FLAGS = $(DEBUG_ASANITIZE)
asan: make-build-dir $(BIN_PATH)/$(BIN_NAME)


make-build-dir:
	mkdir -p $(OBJ_PATH)
	mkdir -p $(BIN_PATH)


$(BIN_PATH)/$(BIN_NAME): $(OBJ_FILES)
	$(CPPC) $(CPPC_FLAGS) $^ -o $@ $(LINKER_FLAGS)


$(OBJ_PATH)/%.o: $(SRC_PATH)/%.c
	$(CPPC) $(CPPC_FLAGS) -c $< -o $@


install:
	@install -vpm 755 -o root -g root $(BIN_PATH)/$(BIN_NAME) /usr/bin/
	@install -vpm 644 -o root -g root pupes-backup.service /etc/systemd/system/
	useradd -m -d /srv/backup -r -s /usr/sbin/nologin pupes_backup

clean:
	rm -fr build

.PHONY: all clean install debug asan