Advent

An Advent of Code boilerplate for Elixir.

Uses Ash Project’s Igniter tool to generate each day’s template files.

Based on Mitchell Hanberg’s advent-of-code-elixir-starter.

Watch the related YouTube video:

Usage

Each day in December, run mix advent.generate.day to generate files related to the current day’s challenge.

This will generate the following files:

• Advent.Year1234.Day01: Write your solution here
• Advent.Year1234.Day01Test: Write tests here
• Mix.Tasks.Year1234.D01.P1: A mix task to run part 1 of the day’s challenge with your input
• Mix.Tasks.Year1234.D01.P2: A mix task to run part 2 of the day’s challenge with your input

Specify a day

To generate a specific day’s files, add the day and optionally the year positional arguments to the generation command. For example, to generate December 1, 2022’s file:

mix advent.generate.day 1 2022

Optional Automatic Input Retriever

This starter comes with a module that will automatically get your inputs so you don't have to mess with copy/pasting. Don't worry, it automatically caches your inputs to your machine so you don't have to worry about slamming the Advent of Code server. You will need to configure it with your cookie and make sure to enable it.

Make sure to set the ADVENT_OF_CODE_SESSION_COOKIE environment variable and set allow_network? to true in config/config.exs.

After which, you can retrieve your inputs using the module:

day = 1
year = 2020
AdventOfCode.Input.get!(day, year)
# or just have it auto-detect the current year
AdventOfCode.Input.get!(7)
# and if your input somehow gets mangled and you need a fresh one:
AdventOfCode.Input.delete!(7, 2019)
# and the next time you `get!` it will download a fresh one -- use this sparingly!