Streamline makefile

Makefile

@@ -1,14 +1,30 @@
+INITIAL_COMMIT		=	6587a780
+INITIAL_LINECOUNT	=	6642	
+
+SRC_FOLDER			=	book
+
+MAIN_FILE			=	RiichiBook1
+LATEX_FILES			=	${SRC_FOLDER}/*.tex
+TARGET				=	${SRC_FOLDER}/${MAIN_FILE}.pdf
+
+DOCKER_IMAGE		=	loopfz/riichi
+
 all: build
 
 build:
-	@docker build --tag=loopfz/riichi:latest .
+	@docker build --tag=${DOCKER_IMAGE}:latest .
 
-book: book/RiichiBook1.pdf
+book:		${TARGET}
 
-book/RiichiBook1.pdf: book/*.tex
+${TARGET}:	${LATEX_FILES}
 	# Build twice to resolve chapter links
-	@docker run -it -v ${PWD}/book:/data --privileged loopfz/riichi lualatex --interaction=nonstopmode --halt-on-error RiichiBook1.tex
-	@docker run -it -v ${PWD}/book:/data --privileged loopfz/riichi lualatex --interaction=nonstopmode --halt-on-error RiichiBook1.tex
+	@docker run -it -v ${PWD}/${SRC_FOLDER}:/data --privileged ${DOCKER_IMAGE} lualatex --interaction=nonstopmode --halt-on-error ${MAIN_FILE}.tex
+	@docker run -it -v ${PWD}/${SRC_FOLDER}:/data --privileged ${DOCKER_IMAGE} lualatex --interaction=nonstopmode --halt-on-error ${MAIN_FILE}.tex
 
 interactive:
-	@docker run -it -v ${PWD}/book:/data --privileged loopfz/riichi bash
+	@docker run -it -v ${PWD}/${SRC_FOLDER}:/data --privileged ${DOCKER_IMAGE} bash
+
+progress:
+	@REMAIN=`{ for f in ${LATEX_FILES}; do git blame $$f; done } | grep ${INITIAL_COMMIT} | wc -l`; \
+	echo $$REMAIN lines from original document; \
+	echo Progress: `expr \( \( ${INITIAL_LINECOUNT} - $$REMAIN \) \* 100 \) / ${INITIAL_LINECOUNT}`\%