Advent of Code 2024

This is the first year I want to participate in Advent of Code. In the past years I always skipped it, because .. yeah. Why not.

And, just because I can, I want to use a different programming language for every day. Nix provides me with the power to do so.

Every program is written such that it reads an example input from stdin and writes the transformed one to stdout.

You can run a specific part of a specific day directly via flake outputs. It is not needed to clone this repository, you could just run it on a system with a flake-enabled nix.

nix run github:jkuball/advent-of-code-2024#day-12-part2

# (keep in mind that this waits for input from stdin)

I am also providing the usual example input and my own challenge input.

nix run .#day-01-part1 < tests/__fixtures/day-01/baseline.txt

# or using the standard cli
std //code/challenges/day-01-part2:run < tests/__fixtures/day-01/challenge.txt

You can use the standard cli to explore this repository and everything it provides: nix run github:divnix/std.

Overview

Day	Status Part 1	Status Part 2	Language
01.12.2024	⭐ DONE	⭐ DONE	bash (pkgs.writeShellApplication)
02.12.2024	⭐ DONE	⭐ DONE	fish (pkgs.writers.writeFishBin)
03.12.2024	🔜 OPEN	🔒 LOCK
04.12.2024	❓ TBD	❓ TBD

Run the Tests

I am using namaka for snapshot based testing. This is the first time using std and namaka together, and I think I did some things weirdly, even wrongly. Maybe I will revisit this in the future.

But right now, to run the tests, one has to update the subflake first:

$ nix flake update --flake ./cells/tests
• Updated input 'aoc':
[...]

$ std //tests/checks/snapshots:check
✔ day-01-part1-baseline
✔ day-01-part1-challenge
✔ day-02-part2-baseline
✔ day-01-part2-baseline
✔ day-01-part2-challenge
✔ day-02-part2-challenge
✔ day-02-part1-baseline
✔ day-02-part1-challenge
All 8 tests succeeded