AdventOfCode

Elixir implementation of the Advent of Code 2021 challenges

Installation

mix deps.get

Secrets config

Make a new file config/secrets.exs and define it like so:

use Mix.Config

config :advent_of_code, AdventOfCode.Input,
  session_cookie: "..." # yours will be longer

Replace the session_cookie value with your cookie from the adventofcode website

dev_input vs cache vs download

There are three different ways of gathering input:

1. Downloading input directly from the advent of code website
2. Using a cache from your saved download
3. Using dev_input directory (aka my input)

Load preference order

The input loading order depends on configuration and existence of files.

1. If allow_dev_dir? in config/config.exs is set to true and the input file exists for your specified year/day/part inside dev_input directory, the program will prioritize this first.
2. If the input file exists for your specified year/day/part inside .cache directory, the program will prioritize this second.
3. If allow_network? in config/config.exs is set to true, it will download the input directly from the Advent of Code website
   • Note: You must have your secret setup correctly. Refer to Secrets Config.

Running

mix day_runner -d X -p Y -y Z

Replace X with your day, Y with part (either 1 or 2), and Z with your year

e.g. to run day 01, part 01, year 2022

mix day_runner -d 1 -p 1 -y 2022