tool to perform recurrent actions

diff --git a/aoc b/aoc
new file mode 100755 (executable)
index 0000000..964beb4
--- /dev/null
+++ b/aoc
@@ -0,0 +1,74 @@
+#!/bin/bash
+
+usage() {
+    cat <<EOF
+usage: aoc [options] <DAY>...
+
+Options:
+  --run           run the solution for the given <DAY> (default)
+  --test          run the tests for the given <DAY>
+  --input         retrieve the input file for the given <DAY> (default)
+  --html          retrieve the writeup for a given <DAY>
+  --help          print this help and exit
+EOF
+}
+
+read_cookie() {
+    [ ! -f .cookie ] && echo "Missing .cookie file" && exit 1
+    COOKIE=$(cat .cookie)
+    [ -z "$COOKIE" ] && echo "Cookie file is empty" && exit 1
+}
+
+get_input() {
+    [ -f input/$DAY.txt ] && return
+    read_cookie
+    curl -o input/$DAY.txt \
+        -H "Cookie: session=$COOKIE" \
+        "https://adventofcode.com/2025/day/$(printf "%d" ${DAY/day/})/input"
+}
+
+get_html() {
+    read_cookie
+    curl -o html/$DAY.html \
+        -H "Cookie: session=$COOKIE" \
+        "https://adventofcode.com/2025/day/$(printf "%d" ${DAY/day/})"
+}
+
+do_test() {
+    cargo test $DAY::tests
+}
+
+do_run() {
+    cargo run --release $DAY input/$DAY.txt
+}
+
+COOKIE=""
+
+DAY=""
+DO_RUN=1
+DO_TEST=0
+DO_INPUT=1
+DO_HTML=0
+
+while [ $# -ge 1 ]; do
+    case $1 in
+        "--run") DO_RUN=1; DO_TEST=0 ;;
+        "--test") DO_RUN=0; DO_TEST=1; DO_INPUT=0 ;;
+        "--input") DO_INPUT=1; DO_RUN=0 ;;
+        "--html") DO_HTML=1; DO_RUN=0 ;;
+        "--help"|"-h") usage && exit 0 ;;
+        -*) echo "Unknown or missing option: $1" && usage && exit 1 ;;
+        *) break ;;
+    esac
+    shift
+done
+
+while [ $# -ge 1 ]; do
+    DAY=$1
+    echo "day: $DAY"
+    [ $DO_HTML -eq 1 ] && get_html
+    [ $DO_INPUT -eq 1 ] && get_input
+    [ $DO_RUN -eq 1 ] && do_run
+    [ $DO_TEST -eq 1 ] && do_test
+    shift
+done