[Enhancement] Makefile for building all programs

.gitignore

@@ -1,3 +1,5 @@
 **/.vs
+.vscode/
+
 bin/
-.vscode/
+__record__

Makefile

@@ -0,0 +1,148 @@
+## Settings
+SHELL := /bin/sh
+CC := gcc
+# -g for debug
+CFLAGS := -O -Wall -W -pedantic -g
+
+# deletes the default value and registers only necessary ones.
+# (Refer to the chapter 16.1 in GNU make manual.)
+.SUFFIXES:
+.SUFFIXES: .c .o .h
+
+# cstr = Color STRing
+define cstr
+"\033[$1m$2\033[0m"
+endef
+name_str = $(call cstr,38;5;49;1,$1)
+build_completed_str = $(call cstr,48;5;222;30, [ BUILD COMPLETED ] )
+installation_done_str = $(call cstr,48;5;150;30, [ INSTALLATION DONE ] )
+warning_str = $(call cstr,48;5;88;37, [ WARNING ] )
+notice_str = $(call cstr,48;5;152;30, [ NOTICE ] )
+
+## Compilations
+programs := btn hd hhss nsy nsy2 yandere
+_programs := $(foreach program,$(programs),./$(program)/c/$(program))
+default_goal := __record__
+tempfile := __Utils_tempfile__
+
+define is_recent
+$(if $1,\
+	@echo $(notice_str) "The following programs have made a successful build:"$\
+	$(call name_str,$(foreach program,$1,\n\t$(program))),\
+	@echo $(notice_str) All programs are already up-to-date!!)
+endef
+
+### This is the default goal. ###
+$(default_goal): $(tempfile) $(_programs)
+	$(call is_recent,$(file < $(tempfile)))
+	rm $(tempfile)
+	touch $(default_goal)
+
+.PHONY: $(tempfile)
+$(tempfile):
+	touch $(tempfile)
+
+define program_template
+$1_path := ./$1/c
+$1_name := $$($1_path)/$1
+$1_sources := $$(wildcard $$($1_path)/*.c)
+$1_objects := $$($1_sources:.c=.o)
+all_objects += $$($1_objects)
+
+.PHONY: $1
+# This rule is for the command `make program-names...`.
+$1: $$($1_name)
+	if ! rm $(tempfile); then \
+		echo $(notice_str) $(call name_str,$1) is already up-to-date!; \
+	fi \
+
+$$($1_name): $$($1_objects)
+	$(CC) $$^ $(CFLAGS) -o $$@
+	$$(file >> $$(tempfile),$1)
+	@echo $(build_completed_str) $(call name_str,$$@)"\n"
+endef
+all_objects =
+
+$(foreach program,$(programs),$(eval $(call program_template,$(program))))
+
+## Auxiliary Tasks
+.PHONY: install
+INSTALL := install
+INSTALL_PROGRAM := $(INSTALL)
+INSTALL_DATA := $(INSTALL) -m 644
+install_path := ./bin
+bindir := $(install_path)
+datadir := $(install_path)/data
+hhss_data := hsr usr
+program_installation_cmd := $(INSTALL_PROGRAM) ./$$i/c/$$i $(bindir)
+data_installation_cmd := $(INSTALL_DATA) ./hhss/$$i $(datadir)
+
+define installation_template
+for i in $1; do \
+	if $2; then \
+		echo $(installation_done_str) $(call name_str,$$i) has been installed successfully.; \
+	else \
+		echo $(warning_str) There was a failure on installing $(call name_str,$$i).; \
+	fi \
+done
+endef
+
+install:
+	test -d $(install_path) || (mkdir $(bindir) && mkdir $(datadir))
+	$(call installation_template,$(programs),$(program_installation_cmd))
+	$(call installation_template,$(hhss_data:%=%.dat),$(data_installation_cmd))
+
+.PHONY: test
+test_path := ./test
+# It is necessary to assign values to these variables from the command line.
+testcase =
+prog =
+
+test: $(test_path)/test_maker
+	cd $(test_path) && ./test_maker ./.test/$(testcase)
+	$(test_path)/test $(bindir)/$(prog)
+
+$(test_path)/test_maker: $(test_path)/test_maker.o
+	$(CC) $^ $(CFLAGS) -o $(test_path)/test_maker
+
+.PHONY: uninstall
+uninstall:
+	rm -rf $(install_path)
+
+.PHONY: clean
+clean:
+	rm -f $(all_objects)
+	rm -f $(_programs)
+
+.PHONY: cleanall
+cleanall: uninstall clean
+	rm -f $(foreach file,test_maker.o test test_maker,$(test_path)/$(file))
+
+.PHONY: help
+cmd_group = $(call cstr,48;5;148;30, $1 )
+cmd_color = $(call cstr,38;5;220,$1)
+cmd_arg_color = $(call cstr,36,$1)
+help:
+	@echo The below are the list of available commands from this Makefile.
+	@echo
+	@echo $(call cmd_group,1. MAKING ACTIONS)
+	@echo "	make		builds every program."
+	@echo "	make "$(call cmd_color,program-names...)
+	@echo " 			builds mentioned program(s) only, e.g. make btn nsy"
+	@echo "	make "$(call cmd_color,install)"	copies the executables of each program into ./bin directory."
+	@echo
+	@echo $(call cmd_group,2. CLEANING ACTIONS)
+	@echo "	make "$(call cmd_color,clean)"	deletes all object files and all executables."
+	@echo "	make "$(call cmd_color,uninstall)"	deletes everything under ./bin directory."
+	@echo "	make "$(call cmd_color,cleanall)"	clean + uninstall + some files in ./test"
+	@echo
+	@echo $(call cmd_group,3. MISCELLANEOUS)
+	@echo "	make "$(call cmd_color,test) \
+	$(call cmd_arg_color,prog)=\"the name of a program to be tested\" $(call cmd_arg_color,testcase)=\"the name of a testcase file\"
+	@echo "			performs a test on the executable with the test file."
+	@echo "	make "$(call cmd_color,help)"	prints this long manual on the screen that you are reading now."
+
+# Frequently Used Commands
+.PHONY: bullshit
+bullshit:
+	export PATH=$(bindir) && hhss 5 | nsy e | btn 20