defmodule Mix.Tasks.Ecto do
  use Mix.Task

  @shortdoc "Prints Ecto help information"

  @moduledoc """
  Prints Ecto tasks and their information.

      $ mix ecto

  """

  @impl true
  def run(args) do
    {_opts, args} = OptionParser.parse!(args, strict: [])

    case args do
      [] -> general()
      _ -> Mix.raise "Invalid arguments, expected: mix ecto"
    end
  end

  defp general() do
    Application.ensure_all_started(:ecto)
    Mix.shell().info "Ecto v#{Application.spec(:ecto, :vsn)}"
    Mix.shell().info "A toolkit for data mapping and language integrated query for Elixir."
    Mix.shell().info "\nAvailable tasks:\n"
    Mix.Tasks.Help.run(["--search", "ecto."])
  end
end