feat: add --year flag for download script

bin/scaffold

@@ -0,0 +1,64 @@
+#!/bin/bash
+
+set -e;
+
+if [ -z "$1" ]; then
+    >&2 echo "Argument is required for day."
+    exit 1
+fi
+
+day=$(echo "$1" | sed 's/^0*//');
+day_padded=$(printf %02d "$day");
+
+filename="$day_padded";
+
+input_path="src/inputs/$filename.txt";
+example_path="src/examples/$filename.txt";
+module_path="src/bin/$filename.rs";
+
+touch "$module_path";
+
+cat > "$module_path" <<EOF
+pub fn part_one(input: &str) -> u32 {
+    0
+}
+
+pub fn part_two(input: &str) -> u32 {
+    0
+}
+
+fn main() {
+    aoc::solve!(&aoc::read_file("inputs", DAYNUM), part_one, part_two)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_part_one() {
+        use aoc::read_file;
+        let input = read_file("examples", DAYNUM);
+        assert_eq!(part_one(&input), 0);
+    }
+
+    #[test]
+    fn test_part_two() {
+        use aoc::read_file;
+        let input = read_file("examples", DAYNUM);
+        assert_eq!(part_two(&input), 0);
+    }
+}
+EOF
+
+perl -pi -e "s,DAYNUM,$day,g" "$module_path";
+
+echo "Created module \"$module_path\"";
+
+touch "$input_path";
+echo "Created empty input file \"$input_path\"";
+
+touch "$example_path";
+echo "Created empty example file \"$example_path\"";
+echo "---"
+echo "🎄 Type \`cargo run --bin $day_padded\` to run your solution."