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reactor_file

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A Reactor extension which provides steps for working with the filesystem.

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reactor_file lib reactor file step io_read.ex
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lib/reactor/file/step/io_read.ex 

defmodule Reactor.File.Step.IoRead do

  @moduledoc false

  use Reactor.File.Step,

    arg_schema: [

      device: [

        type: :any,

        required: true,

        doc: "The IO device to read from"

      ]

    ],

    opt_schema: [

      line_or_chars: [

        type: {:or, [{:in, [:eof, :line]}, :non_neg_integer]},

        required: true,

        doc: "Controls how the device is iterated."

      ]

    ],

    moduledoc: "A step which runs `IO.read/2`"



  @doc false

  @impl true

  def mutate(arguments, context, options) do

    case io_read(arguments.device, options[:line_or_chars], context.current_step) do

      :eof -> {:ok, :eof}

      {:error, reason} -> {:error, reason}

      data -> {:ok, data}

    end

  end

end