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

all: tp2

tp1: tp2.tex
	@latexmk -pdf tp1.tex
	@if ! cmp --silent build/tp2.pdf tp2_*.pdf; then \
		touch tp2_tmp.pdf; \
		rm tp2*.pdf; \
		cp build/tp2.pdf tp2_${timestamp}.pdf; \
		echo "Updated"; \
	fi

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