Advent of Code

Attempt at solving the annual Advent of Code puzzle fun.

Git-Crypt

The issue to not publish your input files came up on Reddit.

There are multiple ways to honor this request. I chose encrypting the input files before pushing them to a public repo. For this I'm using git-crypt, kudos to shrugalic for showing me how to set it up.

Steps to decrypt puzzle files

Install tools

brew install git-crypt
brew install 1password-cli

Get key from 1Password and decrypt

op read --out-file aoc_git-crypt2.key "op://Personal/Advent of Code Git-Crypt Key/aoc_git-crypt.key"
git-crypt unlock aoc_git-crypt.key

It goes without saying that future me should not commit the key file.

Additional Infos

Git-Crypt configuration see: .gitattributes file

Helpful git-crypt commands

git-crypt status # check what will be encrypted
git-crypt status -e # show only files that are or should be encrypted

The following operations require the working directory to be clean

git-crypt lock # Lock files in repo (happens transparently on push to remote)
git-crypt unlock ../advent_of_code_git-crypt.key # Unlock encrypted files in local repo (also happens transparently on pull)