This repository sets up everything you need to start solving the Advent of Code puzzles in Typescript.

• Watch mode for quick feedback
• Timing of solutions
• Automatic reading of input files through convention so that you can focus on solving the problem
• Automatic creation of files and folders for each day
• Eslint, Prettier, and Typechecking preconfigured

1. Clone this repository
2. Run npm install
3. (Optionally) Rename the .env.sample file to .env and fill in your session cookie from adventofcode.com and the year. This will allow you to automatically fetch your input data instead of needing to copy and paste it into the input.txt file.
4. Run npm run bootstrap-day to create the files and folders for the first day. (pass -- --day X to create the files and folders for a specific day).
5. Copy and Paste your input (if you didn't complete step 3) and sample input into the ./src/day-x/input.txt and ./src/day-x/input-sample-part-1.txt files.
6. Go to ./src/day-x/solution.ts and enter the expectedPartOneSampleOutput for your sample input data.
7. Run npm run watch -- --day 1 --part 1 --test to test your solution for day 1 against the sample input.
8. Code your solution in the solvePartOne function of ./src/day-x/solution.ts
9. Run npm run solve -- --day 1 --part 1 to run your solution against the input data.
10. Each day, run npm run bootstrap-day to create the files for the next day and continue solving the puzzles.

If you want to automatically fetch your input data, you will need the following environment variables set:

AOC_SESSION - Your session cookie from adventofcode.com. You can find this by logging into adventofcode.com and looking at the value of the session cookie. AOC_YEAR - The year you are solving for.

Must export functions named solvePartOne and solvePartTwo that each take a string as args and returns a string or Promise<string> (this function can be async). If you want to use test mode to run your solution against the sample input, you will need to export a string named expectedPartOneSampleOutput and expectedPartTwoSampleOutput that contains the expected output for the sample input.

The input for the given day.

The sample input for part 1 for the given day.

The sample input for part 2 for the given day.

To run your solution, enter your data into the input.txt file and run the following command:

npm run solve -- --day 1

This will run both parts 1 and 2. You can also run one part at a time by specifying the part flag:

npm run solve -- --day 1 --part 1

To run your solution in watch mode (so that your solutions rerun whenever you make changes) enter your data into the input.txt file and run the following command:

npm run watch -- --day 1 --part 1

This supports the same --part flag as solve mode.

You can run your solution against the sample input via the --test flag. This works in both watch and solve mode.

You will need to fill out the expectedPartOneSampleOutput and expectedPartTwoSampleOutput exported string in the solution.ts file with the expected output for the sample input as well as fill in the input-sample-part-1.txt and input-sample-part-2.txt files with your sample input.

npm run watch -- --day 1 --part 1 --test

To bootstrap the files and folders for a day, run the following command:

npm run bootstrap-day

This will automatically create the files and folders for the next day.

To create a specific day, pass in the day flag:

npm run bootstrap-day -- --day 1

To create all the days at once, pass in the all flag:

npm run bootstrap-day -- --all

To check your types, run the following command:

npm run typecheck

To lint your code, run the following command:

npm run lint

To format your code, run the following command:

npm run prettier

This project uses commitlint to enforce conventional commit messages. Run npm run commit and follow the prompts to create a commit message.