# - - - - - - #
#             #
#   COLORS    #
#             #
# - - - - - - #

GRAY     = "\e[0;30m"
RED      = "\e[0;31m"
GREEN    = "\e[0;32m"
YELLOW   = "\e[0;33m"
BLUE     = "\e[0;34m"
PURPLE   = "\e[0;35m"
CYAN     = "\e[0;36m"
WHITE    = "\e[0;37m"

B_GRAY   = "\e[1;30m"
B_RED    = "\e[1;31m"
B_GREEN  = "\e[1;32m"
B_YELLOW = "\e[1;33m"
B_BLUE   = "\e[1;34m"
B_PURPLE = "\e[1;35m"
B_CYAN   = "\e[1;36m"
B_WHITE  = "\e[1;37m"

RESET    = "\e[0m"

# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - #
#               . name = value \          . += append to a variable   #
#   VARIABLES   .        value            . != set result of command  #
#               . name is case sensitive  . ?= set if not already set #
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - #

# FILES :
#NAME         -> defined in subfolder makefiles
#SRCS         -> defined in subfolder makefiles
#CLONE        -> defined in subfolder makefiles
#CREATE_CLONE -> defined in subfolder makefiles
LIBS          =
D_SRCS        = .
D_HEADERS     = .
HEADERS       = 

# COMPILATION CONFIG :
CC            = clang
EXT           = c
CFLAGS        = -Wall -Wextra -Werror $(INCLUDES)
CFLAGS       += -g3

# AUTOMATICALLY CREATED :
D_OBJS        = builds
OBJS          = $(SRCS:%.$(EXT)=$(D_OBJS)/%.o)
VPATH         = $(D_SRCS)
F_INCLUDES    = $(HEADERS:%=$(D_HEADERS)/%)
INCLUDES      = -I$(D_HEADERS)
ifeq "$(D_OBJS)" "."
  RM_OBJS     = rm -f $(OBJS)
else
  RM_OBJS     = rm -rf $(D_OBJS)
endif


# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - #
#             .   target: prerequisites   .   $@ : target             #
#    RULES    .           recipe          .   $< : 1st prerequisite   #
#             .           recipe          .   $^ : all prerequisites  #
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - #

all: $(NAME)

# %.$(EXT) | $(D_OBJS) -> pipe is for order-only prerequisites :
#  - for each file "%.$(EXT)" :
#    - if it has been modified since last time
#    - execute rules on corresponding target file "$(D_OBJS)/%.o"
#  - and directory "$(D_OBJS)" is order-only prerequisite :
#    - it must exist before executing rule
#    - but last time modification is not checked
$(D_OBJS)/%.o: %.$(EXT) | $(D_OBJS)
	@echo $(CYAN)"compilation (objects.o) :"$(RESET)
	$(CC) $(CFLAGS) -c $< -o $@

$(D_OBJS):
	mkdir $@

$(OBJS): $(F_INCLUDES)

$(NAME): $(OBJS)
	@echo $(CYAN)"linkage (link objects.o) :"$(RESET)
	$(CC) $(OBJS) -o $@ $(LIBS)

leaks: $(NAME)
	valgrind --leak-check=full --show-leak-kinds=all ./$(NAME)

diff: $(NAME)
	@echo $(CYAN)"compare source with output :"$(RESET)
	$(CREATE_CLONE)
	- diff --color $(CLONE) $(SRCS); \
		if [  $$? -eq 0 ]; then echo $(GREEN)"Files $(SRCS) and $(CLONE) are identical"$(RESET); else echo $(RED)":Files $(NAME) and $(SRCS) differ"$(RESET); fi

clean:
	$(RM_OBJS)
fclean: clean
	rm -f $(NAME)
	rm -f $(CLONE)

re: fclean all

.PHONY : all clean fclean re