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A small framework to solve Advent of Code problems in Elixir

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aoc lib mix tasks aoc.fetch.ex
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lib/mix/tasks/aoc.fetch.ex 

defmodule Mix.Tasks.Aoc.Fetch do

  alias AoC.CLI

  use Mix.Task



  @shortdoc "Fetch the Advent of Code puzzle input"

  @command CLI.year_day_command(__MODULE__)



  @moduledoc """

  This task will fetch the puzzle into `priv/inputs`.



  It will not overwrite an existing input file.



  #{CLI.format_usage(@command, format: :moduledoc)}

  """



  def run(argv) do

    CLI.init_env()



    %{options: options} = CLI.parse_or_halt!(argv, @command)

    %{year: year, day: day} = CLI.validate_options!(options)



    case AoC.Input.ensure_local(year, day) do

      {:ok, path} -> IO.puts("Input #{year}--#{day}: #{path}")

      err -> IO.puts("Error: #{inspect(err)}")

    end

  end

end