# Makefile base template
# 
# Version:
# - 1.0.0: add a version comment
# - 1.1.0: add 'help', 'sjar'
# - 1.2.0: add 'apk'
# - 1.2.1: improve 'apk' and add 'android'
# - 1.3.0: add 'man' for man(ual) pages

# Required parameters (the commented out ones are supposed to be 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"
#ID_FOR_ANDROID = id of activity to launch for Android
#RM_FOR_ANDROID = packages (if it ends with /) or classes to ignore for APK 
#		generation

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

all: build jar man

help:
	@echo "Usual options:"
	@echo "=============="
	@echo "	make		: to build the jar file and man pages IF possible"
	@echo "	make help	: to get this help screen"
	@echo "	make libs	: to update the libraries into src/"
	@echo "	make build	: to update the binaries (not the jar)"
	@echo "	make test	: to update the test binaries"
	@echo "	make build jar	: to update the binaries and jar file"
	@echo "	make sjar	: to create the sources jar file"
	@echo "	make clean	: to clean the directory of intermediate files"
	@echo "	make mrpropre	: to clean the directory of all outputs"
	@echo "	make run	: to run the program from the binaries"
	@echo "	make run-test	: to run the test program from the binaries"
	@echo "	make jrun	: to run the program from the jar file"
	@echo "	make install	: to install the application into $$PREFIX"
	@echo "	make android	: to prepare the sources in android/ for Studio"
	@echo "	make apk	: to compile the APK file"
	@echo " make ifman	: to make the manual pages (if pandoc is found)"
	@echo " make man	: to make the manual pages (requires pandoc)"

.PHONY: all clean mrproper mrpropre build run jrun jar sjar resources test-resources install libs love apk android ifman man

bin:
	@mkdir -p bin

jar: $(NAME).jar

sjar: $(NAME)-sources.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/
	rm -rf android/.gradle android/build android/app/build android/app/build.gradle
	[ ! -L android/app/src/main/java ] || rm -rf android/app/src
	@echo Removing sources taken from libs...
	@for lib in libs/*-sources.jar libs/*-sources.patch.jar; do \
		if [ "$$lib" != 'libs/*-sources.jar' -a "$$lib" != 'libs/*-sources.patch.jar' ]; then \
			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; \
		fi \
	done

mrproper: mrpropre

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

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 ../libs/*-sources.patch.jar; do \
		if [ "$$lib" != '../libs/*-sources.jar' -a "$$lib" != '../libs/*-sources.patch.jar' ]; then \
			basename "$$lib"; \
			jar xf "$$lib"; \
		fi \
	done )
	@[ ! -d libs ] || touch bin/libs

$(NAME)-sources.jar: libs
	@echo Making sources JAR file...
	@echo > bin/manifest
	@[ "$(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"

$(NAME).jar: resources
	@[ -e bin/$(MAIN).class ] || echo You need to build the sources
	@[ -e bin/$(MAIN).class ]
	@echo "Main-Class: `echo "$(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)"
	if [ -e "man/man1/$(NAME).1" ]; then \
		cp -r man/ "$(PREFIX)"/share/; \
	fi

android: android/app/src

android/app/src:
	@[ -d android ] || echo No android/ directory found
	@[ -d android ]
	@[ -e android/local.properties ] || echo 'You need to create android/local.properties and add "sdk.dir=PATH_TO_SDK"'
	@[ -e android/local.properties ]
	@mkdir -p android/app/src/main
	@echo Linking sources...
	@( \
		cd android/app/src/main; \
		ln -s ../../../../src/AndroidManifest.xml .; \
		ln -s ../../../../res .; \
		ln -s ../../../../src ./java; \
	)
	@echo Fixing configuration...
	@( \
		cd android/app/src/main/java; \
		excl="\\n";\
		if [ "${RM_FOR_ANDROID}" != "" ]; then \
			echo Ignoring uneeded sources...; \
			for file in ${RM_FOR_ANDROID}; do \
				excl="$${excl}exclude '**/$${file}'\\n";\
			done; \
		fi; \
		cd ../../../ ; \
		cat build.gradle.base \
			| sed 's:\(applicationId "\)":\1${ID_FOR_ANDROID}":' \
			| sed "s:\s*exclude '':$$excl:g" \
		> build.gradle; \
	)

apk: libs ${NAME}.apk
	@echo Building APK files...

${NAME}.apk: ${NAME}-debug.apk

${NAME}-debug.apk: android
	@echo Starting gradlew assemble...
	@( \
		cd android/; \
		bash gradlew assemble && ( \
			cd ..; \
			cp android/app/build/outputs/apk/release/app-release-unsigned.apk ${NAME}.apk; \
			cp android/app/build/outputs/apk/debug/app-debug.apk ${NAME}-debug.apk; \
			[ ! -e VERSION ] || echo Copying to "$(NAME)-`cat VERSION`.apk"...; \
			[ ! -e VERSION ] || cp $(NAME).apk "$(NAME)-`cat VERSION`.apk"; \
			[ ! -e VERSION ] || echo Copying to "$(NAME)-`cat VERSION`-debug.apk"...; \
			[ ! -e VERSION ] || cp $(NAME).apk "$(NAME)-`cat VERSION`-debug.apk"; \
		); \
	)

ifman:
	@if pandoc -v >/dev/null 2>&1; then \
		make man; \
	else \
		echo "man pages not generated: "'`'"pandoc' required"; \
	fi

man: 
	@echo Checking for possible manual pages...
	@if [ -e README.md ]; then \
		echo Sources found for man pages; \
		if pandoc -v >/dev/null 2>&1; then \
			ls README*.md 2>/dev/null \
					| grep 'README\(-..\|\)\.md' \
					| while read man; do \
				echo "	Processing page $$lang..."; \
				lang="`echo "$$man" \
					| sed 's:README\.md:en:' \
					| sed 's:README-\(.*\)\.md:\1:'`"; \
				mkdir -p man/"$$lang"/man1; \
				( \
					echo ".TH \"${NAME}\" 1 `\
						date +%Y-%m-%d\
						` \"version `cat VERSION`\""; \
					echo; \
					UNAME="`echo "${NAME}" \
						| sed 's:\(.*\):\U\1:g'`"; \
					( \
						cat "$$man" | head -n1 \
	| sed 's:.*(README\(-fr\|\)\.md).*::g'; \
						cat "$$man" | tail -n+2; \
					) | sed 's:^#\(#.*\):\1:g' \
	| sed 's:^\(#.*\):\U\1:g;s:# *'"$$UNAME"':# NAME\n'"${NAME}"' \\- :g' \
	| sed 's:--:——:g' \
	| pandoc -f markdown -t man | sed 's:——:--:g' ; \
				) > man/"$$lang"/man1/"${NAME}.1"; \
			done; \
			mkdir -p "man/man1"; \
			cp man/en/man1/"${NAME}".1 man/man1/; \
		else \
			echo "man pages generation: pandoc required" >&2; \
			false; \
		fi; \
	fi;