vinniecent / advent-of-code-2023

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Advent of code 2023

Forked from: https://github.com/Martinsos/aoc-2023-haskell-template

Setup

You are expected to have ghcup installed on your machine.

Run ./ghcup-set.sh to set the intended version of GHC, cabal and HLS via GHCup.

If any of the versions needed are not yet installed on your machine, you can use ghcup tui to install them.

It might work with other combination of versions also, but this combo works for sure.

If all is good, cabal build should complete successfully for you.

Organization of the codebase

src/ contains all the Haskell code. src/Day01.hs, src/Day02.hs, ... each contain the solution for that specific day, and they are all imported into the src/Main.hs, which is the executable that we use to easily run the solution for the specific day.

data/ dir is where puzzle input files go for each day. Each day, you should save a new file there, named dayXY-input.txt where XY is day number (01, 25, ...). Your code in src/DayXX.hs can then read those files as needed. These data files are gitignored, since AoC authors ask not to publicly post your puzzle input files.

Running

Easiest way is calling ./day <num> to run specific day, e.g. ./day 01 or ./day 25.

day is really just a helper script for calling cabal run, so you can use cabal run directly if you want more control. cabal run will build all your code (same as cabal build) and then run the executable which has src/Main.hs as its entry point.

cabal repl is also interesting option: it will take you to ghci where all the modules are already loaded for you and you can easily run any function, this is great for debugging and testing, or even normal running. You can just type day01 and run it that way. Type :r to reload upon changes in the code.

Project config

This is a cabal-based project.

aoc2023.cabal file already contains the default configuration that should work fine for you.

You will notice it also contains some commented-out extensions and dependencies(packages). These are some common extensions and dependencies that we think you are likely to need so we put them there for your convenience, you just need to uncomment them in order to get going with them.

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