Utility to download Advent of Code puzzle inputs.

cargo install aochelper

Run

aochelper set year <year>

in the directory in which you'll be working to set the puzzle year.

The authentication is automatic if you log into Advent of Code with Snap-installed Firefox on Linux. Otherwise, get your Advent of Code session cookie from your browser of choice, and run

aochelper set session_key <your key here>

To download a puzzle for a given day:

aochelper get <day>

This will download the puzzle inputs to inputs/year.day.

Works on my machine!