Advent of Code Runner

Why use a single language when you could have them all?

Here, you’ll find the code I’ve used for every problem I managed to solve. As I use a different language every time, there are orphan branches for each language with the solutions I have used that tech. To manage the solution, I’ve made a simple shell script that uses git worktree to address the “subrepos” along with yq to run simple tests.

Since there are multiple inputs for the same problem and I didn’t want to publish mine, the input folder is empty. To include your inputs, you’ll need to put them at yyyy/MM-{1,2}.txt - the same path for the tests but with a txt extension instead. The script then pipes inputs to solutions housed at solutions/<lang>, which come from branches with the language name. Each language used to solve the challenges must have a basic Justfile with three recipes:

• setup: for laying foundations, such as runtimes and other dependencies;
• prepare puzzle: for doing pre-work right before running a solution;
• solve puzzle: for receiving the forwarded input and giving a clean output, such as expected by the site.

To run the project, all you need is to set your language of choice with ./advent-of-code -s -l <lang> and then solve the challenges with ./advent-of-code yyyy/MM-{1,2} -l lang.

Tips

• Whenever developing or focusing on a single language, create a .envrc to export the LANGUAGE variable so you don’t need to use -l <lang> every time.