blob: e27bfb18cfad09bfad743fe009094884bde91467 (
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#!/bin/bash
set -euo pipefail
AOC_DIR="${AOC_DIR:-$HOME/.aoc}"
CACHE_DIR="$AOC_DIR/cache"
SESSION_FILE="$AOC_DIR/session"
usage() {
pname=$(basename "$0")
echo "Usage: $pname <year> <day>" >&2
exit 1
}
verify_int() {
if ! [[ "$1" =~ ^[0-9]+$ ]]; then
echo "'$1' is not an integer" >&2
usage
fi
}
if [ $# != 2 ]; then
usage
fi
year="$1"
day="$2"
verify_int "$year"
verify_int "$day"
year_cache_dir="$CACHE_DIR/$year"
cache_file="$year_cache_dir/d$day.in"
mkdir -p "$year_cache_dir"
if [ ! -f "$cache_file" ]; then
echo "Input not cached, downloading..." >&2
if [ ! -f "$SESSION_FILE" ]; then
echo "Error: No session file available" >&2
exit 1
fi
session="$(cat "$SESSION_FILE")"
url="https://adventofcode.com/$year/day/$day/input"
curl -f "$url" -o "$cache_file" -b "session=$session"
fi
cat "$cache_file"
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