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https://github.com/amacgregor/advent-of-code-elixir


https://github.com/amacgregor/advent-of-code-elixir

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README 

        
# Advent of Code Elixir Starter



A batteries included starter pack for participating in [Advent of Code](https://www.adventofcode.com) using Elixir!



## Usage



There are 25 modules, 25 tests, and 50 mix tasks.



1. Fill in the tests with the example solutions.

1. Write your implementation.

1. Fill in the final problem inputs into the mix task and run `mix d01.p1`!

    - Benchmark your solution by passing the `-b` flag, `mix d01.p1 -b`



```elixir

defmodule AdventOfCode.Day01 do

  def part1(args) do

  end



  def part2(args) do

  end

end

```



```elixir

defmodule AdventOfCode.Day01Test do

  use ExUnit.Case



  import AdventOfCode.Day01



  @tag :skip # Make sure to remove to run your test.

  test "part1" do

    input = nil

    result = part1(input)



    assert result

  end



  @tag :skip # Make sure to remove to run your test.

  test "part2" do

    input = nil

    result = part2(input)



    assert result

  end

end

```



```elixir

defmodule Mix.Tasks.D01.P1 do

  use Mix.Task



  import AdventOfCode.Day01



  @shortdoc "Day 01 Part 1"

  def run(args) do

    input = AdventOfCode.Input.get!(1, 2020)



    if Enum.member?(args, "-b"),

      do: Benchee.run(%{part_1: fn -> input |> part1() end}),

      else:

        input

        |> part1()

        |> IO.inspect(label: "Part 1 Results")

  end

end

```



### 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. You can do this by creating a `config/secrets.exs` file containing

the following:



```elixir

import Config



config :advent_of_code, AdventOfCode.Input,

  allow_network?: true,

  session_cookie: "..." # yours will be longer

```



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



```elixir

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!

```



## Installation



```bash

# clone

$ git clone [email protected]:mhanberg/advent-of-code-elixir-starter.git advent-of-code

$ cd advent-of-code



# Reinitialize your git repo

$ rm -rf .git && rm -rf .github

$ git init

```

### Get started coding with zero configuration



#### Using Visual Studio Code



1. [Install Docker Desktop](https://www.docker.com/products/docker-desktop)

1. Open project directory in VS Code

1. Press F1, and select `Remote-Containers: Reopen in Container...`

1. Wait a few minutes as it pulls image down and builds Dev Conatiner Docker image (this should only need to happen once unless you modify the Dockerfile)

    1. You can see progress of the build by clicking `Starting Dev Container (show log): Building image` that appears in bottom right corner

    1. During the build process it will also automatically run `mix deps.get`

1. Once complete VS Code will connect your running Dev Container and will feel like your doing local development

1. If you would like to use a specific version of Elixir change the `VARIANT` version in `.devcontainer/devcontainer.json`

1. If you would like more information about VS Code Dev Containers check out the [dev container documentation](https://code.visualstudio.com/docs/remote/create-dev-container/?WT.mc_id=AZ-MVP-5003399)



#### Compatible with Github Codespaces

1. If you dont have Github Codespaces beta access, sign up for the beta https://github.com/features/codespaces/signup

1. On GitHub, navigate to the main page of the repository.

1. Under the repository name, use the  Code drop-down menu, and select Open with Codespaces.

1. If you already have a codespace for the branch, click  New codespace.