Note that auto-discovery of imports in src/Problems currently depends on a
light ruby script, so a functioning ruby install is required.
To auth input and prompt fetches, log in in the web and copy the session
cookie to ./session.
# Print full help message
$ stack run -- advent help
# Scaffold prompt and solution for a day
$ stack run -- advent [-y <year>] [-d <day>] init
# Run a solution
$ stack run -- advent [-y <year>] [-d <day>] run
# Run a solution and submit the answer
$ stack run -- advent [-y <year>] [-d <day>] run --submit <part>
# Run with profiling
$ stack run --profile -- advent run +RTS -p