DAYS = $(shell seq 1 25 | xargs printf "%02i\n")

.PHONY: all
all::

define make-day
all:: $1/run
.PHONY: $1/run
$1/main: $1/main.zig
	zig build-exe \
		--pkg-begin "aoc" "common/aoc.zig" --pkg-end \
		--pkg-begin "console8" "common/console8.zig" --pkg-end \
		--cache-dir .cache/zig -femit-bin=$1/main -freference-trace \
		$1/main.zig
$1/run: $1/main
	@echo "== day $1 =="
	@echo -en "\npart 1: " && cd $1 && time ./main 1
	@echo -en "\npart 2: " && cd $1 && time ./main 2
	@echo ""
endef
$(foreach day,$(DAYS),$(eval $(call make-day,$(day))))