Mix task to list information about all dependencies

deps.info.ex

defmodule Mix.Tasks.Deps.Info do
  use Mix.Task

  @moduledoc """
  Prints information for every dependency from Hex
  """

  def run(_args) do
    Mix.Project.get!
    Mix.Dep.loaded([env: :prod])
    |> Enum.each(fn(dep) ->
      {200, %{"meta" => info, "name" => name}, _api} = Hex.API.Package.get(dep.app)
      IO.puts("""
      #{name}:
          description: #{info["description"]}
          licenses: #{info["licenses"] |> format_list}
          link: #{info["links"] |> get_one_value}
      """)
    end)
  end

  defp format_list(nil), do: ""
  defp format_list(list), do: Enum.join(list, " ")

  defp get_one_value(nil), do: ""
  defp get_one_value(map) do
    map |> Map.values |> hd
  end

end