# Required parameters (the commented out ones are supposed to change per project):

#MAIN = path to main java source to compile
#MORE = path to supplementary needed resources not linked from MAIN
#NAME = name of project (used for jar output file)
#PREFIX = usually /usr/local (where to install the program)
#TEST = path to main test source to compile
#JAR_FLAGS += a list of things to pack, each usually prefixed with "-C bin/"
#SJAR_FLAGS += a list of things to pack, each usually prefixed with "-C src/", for *-sources.jar files
#TEST_PARAMS = any parameter to pass to the test runnable when "test-run"

JAVAC = javac
JAVAC_FLAGS += -encoding UTF-8 -d ./bin/ -cp ./src/
JAVA = java
JAVA_FLAGS += -cp ./bin/
JAR = jar
RJAR = java
RJAR_FLAGS += -jar

# Usual options:
# 	make		: to build the jar file
# 	make libs	: to update the libraries into src/
# 	make build	: to update the binaries (not the jar)
# 	make test	: to update the test binaries
# 	make build jar	: to update the binaries and jar file
# 	make clean	: to clean the directory of intermediate files
# 	make mrpropre	: to clean the directory of all outputs
# 	make run	: to run the program from the binaries
# 	make run-test	: to run the test program from the binaries
# 	make jrun	: to run the program from the jar file
# 	make install	: to install the application into $PREFIX

# Note: build is actually slower than rebuild in most cases except when
# small changes only are detected ; so we use rebuild by default

all: build jar

.PHONY: all clean mrproper mrpropre build run jrun jar resources test-resources install libs love 

bin:
	@mkdir -p bin

jar: $(NAME).jar

build: resources
	@echo Compiling program...
	@echo "	src/$(MAIN)"
	@$(JAVAC) $(JAVAC_FLAGS) "src/$(MAIN).java"
	@[ "$(MORE)" = "" ] || for sup in $(MORE); do \
		echo "	src/$$sup" ;\
		$(JAVAC) $(JAVAC_FLAGS) "src/$$sup.java" ; \
	done

test: test-resources
	@[ -e bin/$(MAIN).class ] || echo You need to build the sources
	@[ -e bin/$(MAIN).class ]
	@echo Compiling test program...
	@[ "$(TEST)" != "" ] || echo No test sources defined.
	@[ "$(TEST)"  = "" ] || for sup in $(TEST); do \
		echo "	src/$$sup" ;\
		$(JAVAC) $(JAVAC_FLAGS) "src/$$sup.java" ; \
	done

clean:
	rm -rf bin/
	@echo Removing sources taken from libs...
	@for lib in libs/*-sources.jar; do \
		basename "$$lib"; \
		jar tf "$$lib" | while read -r ln; do \
			[ -f "src/$$ln" ] && rm "src/$$ln"; \
		done; \
		jar tf "$$lib" | tac | while read -r ln; do \
			[ -d "src/$$ln" ] && rmdir "src/$$ln" 2>/dev/null || true; \
		done; \
	done

mrproper: mrpropre

mrpropre: clean
	rm -f $(NAME).jar
	rm -f $(NAME)-sources.jar
	[ ! -e VERSION ] || rm -f "$(NAME)-`cat VERSION`.jar"
	[ ! -e VERSION ] || rm -f "$(NAME)-`cat VERSION`-sources.jar"

love:
	@echo "	...not war."

resources: libs
	@echo Copying resources into bin/...
	@cd src && find . | grep -v '\.java$$' | grep -v '/test/' | while read -r ln; do \
		if [ -f "$$ln" ]; then \
			dir="`dirname "$$ln"`"; \
			mkdir -p "../bin/$$dir" ; \
			cp "$$ln" "../bin/$$ln" ; \
		fi ; \
	done
	@cp VERSION bin/

test-resources: resources
	@echo Copying test resources into bin/...
	@cd src && find . | grep -v '\.java$$' | grep '/test/' | while read -r ln; do \
		if [ -f "$$ln" ]; then \
			dir="`dirname "$$ln"`"; \
			mkdir -p "../bin/$$dir" ; \
			cp "$$ln" "../bin/$$ln" ; \
		fi ; \
	done

libs: bin
	@[ -e bin/libs -o ! -d libs ] || echo Extracting sources from libs...
	@[ -e bin/libs -o ! -d libs ] || (cd src && for lib in ../libs/*-sources.jar; do \
		basename "$$lib"; \
		jar xf "$$lib"; \
	done )
	@[ ! -d libs ] || touch bin/libs

$(NAME).jar: resources
	@[ -e bin/$(MAIN).class ] || echo You need to build the sources
	@[ -e bin/$(MAIN).class ]
	@echo Making JAR file...
	@echo > bin/manifest
	@[ "$(SJAR_FLAGS)" = "" ] || echo Creating $(NAME)-sources.jar...
	@[ "$(SJAR_FLAGS)" = "" ] || $(JAR) cfm $(NAME)-sources.jar bin/manifest $(SJAR_FLAGS)
	@[ "$(SJAR_FLAGS)" = "" ] || [ ! -e VERSION ] || echo Copying to "$(NAME)-`cat VERSION`-sources.jar"...
	@[ "$(SJAR_FLAGS)" = "" ] || [ ! -e VERSION ] || cp $(NAME)-sources.jar "$(NAME)-`cat VERSION`-sources.jar"
	@echo "Main-Class: `echo "$(MAIN)" | sed 's:/:.:g'`" > bin/manifest
	@echo >> bin/manifest
	$(JAR) cfm $(NAME).jar bin/manifest $(JAR_FLAGS)
	@[ ! -e VERSION ] || echo Copying to "$(NAME)-`cat VERSION`.jar"...
	@[ ! -e VERSION ] || cp $(NAME).jar "$(NAME)-`cat VERSION`.jar"

run: 
	@[ -e bin/$(MAIN).class ] || echo You need to build the sources
	@[ -e bin/$(MAIN).class ]
	@echo Running "$(NAME)"...
	$(JAVA) $(JAVA_FLAGS) $(MAIN)

jrun:
	@[ -e $(NAME).jar ] || echo You need to build the jar
	@[ -e $(NAME).jar ]
	@echo Running "$(NAME).jar"...
	$(RJAR) $(RJAR_FLAGS) $(NAME).jar

run-test: 
	@[ "$(TEST)" = "" -o -e "bin/$(TEST).class" ] || echo You need to build the test sources
	@[ "$(TEST)" = "" -o -e "bin/$(TEST).class" ]
	@echo Running tests for "$(NAME)"...
	@[ "$(TEST)" != "" ] || echo No test sources defined.
	[ "$(TEST)"  = "" ] || ( clear ; $(JAVA) $(JAVA_FLAGS) $(TEST) $(TEST_PARAMS) )

install:
	@[ -e $(NAME).jar ] || echo You need to build the jar
	@[ -e $(NAME).jar ]
	mkdir -p "$(PREFIX)/lib" "$(PREFIX)/bin"
	cp $(NAME).jar "$(PREFIX)/lib/"
	echo "#!/bin/sh" > "$(PREFIX)/bin/$(NAME)"
	echo "$(RJAR) $(RJAR_FLAGS) \"$(PREFIX)/lib/$(NAME).jar\" \"\$$@\"" >> "$(PREFIX)/bin/$(NAME)"
	chmod a+rx "$(PREFIX)/bin/$(NAME)"