day 22

Signed-off-by: Amneesh Singh <natto@weirdnatto.in>

fetch.sh

@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+
+SOURCE_DIR=$(realpath "$(dirname "$0")")
+INPUT_DIR=${INPUT_DIR:="$SOURCE_DIR/inputs"}
+
+help () {
+  echo "usage:   $0 <day1-day25>"
+  echo "example: $0 day15"
+  echo "         $0 15"
+  echo "         $0 all"
+}
+
+fetch () {
+  TMPFILE=$(mktemp)
+  curl "https://adventofcode.com/2024/day/${1}/input"          \
+    -s --fail-with-body --cookie "session=$AOC_SESSION"            \
+    -o "${TMPFILE}"
+
+  mkdir -p "$INPUT_DIR"
+  mv "$TMPFILE" "$INPUT_DIR/day${1}.in"
+  echo "Fetched Day $1"
+}
+
+if [[ $# != 1 || ! "${1#day}" =~ ^([1-9]|1[0-9]|2[0-5]|all)$ ]]; then
+  help
+  exit 1
+fi
+
+if [[ -z "${AOC_SESSION}" ]]; then
+  echo "\$AOC_SESSION is not set"
+  exit 1
+fi
+
+if [[ $1 == "all" ]]; then
+    for x in {1..25}; do fetch "$x"; done
+else
+    fetch "${1#day}"
+fi