make

makefile

 
 .SILENT:
 
-PYTHONPATH := .
 CODE := $(shell find . -path "./y????/p??.py" -type f | xargs ls -rt | tail -n 1)
 DATA := $(shell echo ${CODE} | sed s/.py/.dat/)
 YEAR := $(shell echo ${CODE} | sed 's/[^0-9]/ /g' | cut -d' ' -f4)
 DAY := $(shell echo ${CODE} | sed 's/[^0-9]/ /g' | cut -d' ' -f6)
 URL := https://adventofcode.com/${YEAR}/day/`echo ${DAY} | bc`/input
 
-main:
+pyrun: ${DATA}
+	PYTHONPATH=. python3 -u ${CODE} < ${DATA}
+
+${DATA}:
 	# avoid spam in the lead up to the event
 	test ${YEAR}${DAY} -le `date +%Y%d`
 	# only poll if data isn't yet stored locally
 	test -f ${DATA} || curl -s -b "session=${SESSION}" ${URL} > ${DATA}
-	# have fun! (access data through `open(0)`)
-	cat $(DATA) | python3 -u ${CODE}