It's a tad lengthy but I feel like I've found the direction I would like to go in with these. Maybe I'll finally write that guide soon...
NAME = pipex
DEBUG_NAME = debug.out
SRC_DIR = srcs
OBJ_DIR = obj
PATH_MANDATORY = mandatory
PATH_BONUS = bonus
INC_DIR = includes
DEP_DIR = deps
LIBFT_DIR = $(DEP_DIR)/libft
LIBFT = $(LIBFT_DIR)/libft.a
SRC_NAMES_SHARED = utils/arr_cut.c \
utils/arr_free.c \
utils/arr_has.c \
utils/arr_len.c \
utils/dedupe.c \
utils/err.c \
parent/get_paths.c \
parent/wait_all.c \
child/dispatch.c \
child/get_cmd.c
SRC_NAMES_MANDATORY = main.c \
parent/dispatcher.c
SRC_NAMES_BONUS = main.c \
parent/dispatcher.c \
parent/here_doc.c
CC = cc
CC_EXT_SRCS = $(LIBFT)
FLAGS = -I$(INC_DIR) -Wall -Wextra -Werror
DEBUG_FLAGS = -I$(INC_DIR) -g -fsanitize=address,undefined,integer
################################################################################
OBJS_SHARED = $(SRC_NAMES_SHARED:%.c=$(OBJ_DIR)/$(PATH_MANDATORY)/%.o)
OBJS_MANDATORY = $(SRC_NAMES_MANDATORY:%.c=$(OBJ_DIR)/$(PATH_MANDATORY)/%.o)
OBJS_BONUS = $(SRC_NAMES_BONUS:%.c=$(OBJ_DIR)/$(PATH_BONUS)/%.o)
OBJS_SHARED_DEBUG = $(SRC_NAMES_SHARED:%.c=$(OBJ_DIR)/debug/$(PATH_MANDATORY)/%.o)
OBJS_MANDATORY_DEBUG = $(SRC_NAMES_MANDATORY:%.c=$(OBJ_DIR)/debug/$(PATH_MANDATORY)/%.o)
OBJS_BONUS_DEBUG = $(SRC_NAMES_BONUS:%.c=$(OBJ_DIR)/debug/$(PATH_BONUS)/%.o)
.PHONY: all bonus \
debug debug_bonus \
clean .clean fclean re
################################################################################
all: $(NAME)
$(OBJ_DIR)/debug/%.o: $(SRC_DIR)/%.c
@mkdir -p $(dir $@)
@echo "$(GREY)$(NAME) $(DEFAULT)| $(GREEN)$< $(PURPLE)$(DEBUG_FLAGS) $(RED)> $(GREY)$@$(DEFAULT)"
@$(CC) $(DEBUG_FLAGS) -c $< -o $@
$(OBJ_DIR)/%.o: $(SRC_DIR)/%.c
@mkdir -p $(dir $@)
@echo "$(GREY)$(NAME) $(DEFAULT)| $(GREEN)$< $(PURPLE)$(FLAGS) $(RED)> $(GREY)$@$(DEFAULT)"
@$(CC) $(FLAGS) -c $< -o $@
################################################################################
$(LIBFT):
@make -C $(LIBFT_DIR) bonus
################################################################################
$(NAME): $(LIBFT) $(OBJS_SHARED) $(OBJS_MANDATORY)
@$(CC) $(FLAGS) $(CC_EXT_SRCS) $(OBJS_SHARED) $(OBJS_MANDATORY) -o $(NAME)
@echo "$(GREY)$(NAME) $(DEFAULT)| $(GREEN)Mandatory done$(DEFAULT)"
.bonus: $(LIBFT) $(OBJS_SHARED) $(OBJS_BONUS)
@$(CC) $(FLAGS) $(CC_EXT_SRCS) $(OBJS_SHARED) $(OBJS_BONUS) -o $(NAME)
@touch .bonus
@echo "$(GREY)$(NAME) $(DEFAULT)| $(GREEN)Bonus done$(DEFAULT)"
bonus: .bonus
################################################################################
$(DEBUG_NAME): $(LIBFT) $(OBJS_SHARED_DEBUG) $(OBJS_MANDATORY_DEBUG)
@$(CC) $(DEBUG_FLAGS) $(CC_EXT_SRCS) $(OBJS_SHARED_DEBUG) $(OBJS_MANDATORY_DEBUG) -o $(DEBUG_NAME)
@echo "$(GREY)$(NAME) $(DEBUG_NAME) $(DEFAULT)| $(GREEN)Mandatory done$(DEFAULT)"
.debug_bonus: $(LIBFT) $(OBJS_SHARED_DEBUG) $(OBJS_BONUS_DEBUG)
@$(CC) $(DEBUG_FLAGS) $(CC_EXT_SRCS) $(OBJS_SHARED_DEBUG) $(OBJS_BONUS_DEBUG) -o $(DEBUG_NAME)
@touch .bonus
@echo "$(GREY)$(NAME) $(DEBUG_NAME) $(DEFAULT)| $(GREEN)Bonus done$(DEFAULT)"
debug_bonus: .debug_bonus
################################################################################
.clean:
@echo "$(GREY)$(NAME) $(DEFAULT)| $(RED)Removing $(DEFAULT)$(OBJ_DIR), .bonus, and .debug_bonus"
@rm -rf $(OBJ_DIR) .bonus .debug_bonus
clean: .clean
@make -C $(LIBFT_DIR) clean
fclean: .clean
@make -C $(LIBFT_DIR) fclean
@echo "$(GREY)$(NAME) $(DEFAULT)| $(RED)Removing $(DEFAULT)$(NAME) and $(DEBUG_NAME)"
@rm -f $(NAME) $(DEBUG_NAME)
re: fclean all
################################################################################
GREEN = \033[38;5;84m
RED = \033[38;5;9m
BLUE = \033[38;5;45m
#PURPLE = \033[38;5;63m
PINK = \033[38;5;207m
PURPLE = \033[38;5;165m
BLACK = \033[38;5;0m
BG_WHITE = \033[48;5;15m
BG_GREEN = \033[48;5;84m
BG_RED = \033[48;5;9m
BG_PURPLE = \033[48;5;54m
GREY = \033[38;5;8m
BOLD = \033[1m
DEFAULT = \033[0m
CHECKMARK = \xE2\x9C\x93
