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Composable Igniter tasks for bootstrapping Phoenix applications

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project lib mix tasks project add tidewave.ex
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lib/mix/tasks/project/add/tidewave.ex 

defmodule Mix.Tasks.Project.Add.Tidewave do

  @shortdoc "Adds Tidewave AI assistant"

  @moduledoc "Adds `tidewave` AI assistant."

  use Igniter.Mix.Task



  @impl Igniter.Mix.Task

  def igniter(igniter) do

    igniter

    |> add_dep()

    |> update_endpoint()

  end



  defp add_dep(igniter) do

    {package, version} = Igniter.Project.Deps.determine_dep_type_and_version!("tidewave")

    Igniter.Project.Deps.add_dep(igniter, {package, version, only: :dev})

  end



  defp update_endpoint(igniter) do

    {_, endpoint} = Igniter.Libs.Phoenix.select_endpoint(igniter)



    if endpoint do

      code = """

      # Tidewave

      if Code.ensure_loaded?(Tidewave) do

        plug Tidewave

      end

      """



      Igniter.Project.Module.find_and_update_module!(igniter, endpoint, fn zipper ->

        case Sourceror.Zipper.search_pattern(zipper, "if code_reloading? do end") do

          nil -> Igniter.Code.Common.add_code(zipper, code, placement: :after)

          found -> {:ok, Igniter.Code.Common.add_code(found, code, placement: :before)}

        end

      end)

    else

      Igniter.add_warning(igniter, "No Phoenix endpoint found!")

    end

  end

end