filename=$(shell basename $(shell pwd))
timestamp=$(shell date +%Y-%m-%d_%H:%M)

all: snapshot exercices dm1 controle1

snapshot: main.tex
	@latexmk -pdf main.tex
	@if ! cmp --silent build/main.pdf ${filename}_*.pdf; then \
		touch ${filename}_tmp.pdf; \
		rm ${filename}*.pdf; \
		cp build/main.pdf ${filename}_${timestamp}.pdf; \
		echo "Updated"; \
	fi

exercices: exercices.tex
	@latexmk -pdf exercices.tex
	@if ! cmp --silent build/exercices.pdf exercices_*.pdf; then \
		touch exercices_tmp.pdf; \
		rm exercices*.pdf; \
		cp build/exercices.pdf exercices_${timestamp}.pdf; \
		echo "Updated"; \
	fi

dm1: dm1.tex
	@latexmk -pdf dm1.tex
	@if ! cmp --silent build/dm1.pdf dm1_*.pdf; then \
		touch dm1_tmp.pdf; \
		rm dm1*.pdf; \
		cp build/dm1.pdf dm1_${timestamp}.pdf; \
		echo "Updated"; \
	fi

controle1: controle1.tex
	@latexmk -pdf controle1.tex
	@if ! cmp --silent build/controle1.pdf controle1_*.pdf; then \
		touch controle1_tmp.pdf; \
		rm controle1*.pdf; \
		cp build/controle1.pdf controle1_${timestamp}.pdf; \
		echo "Updated"; \
	fi

clean:
	@rm -rf build 2>/dev/null