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ex_debug_toolbar

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A debug web toolbar for Phoenix projects to display all sorts of information about request

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ex_debug_toolbar lib ex_debug_toolbar breakpoint pry.ex
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lib/ex_debug_toolbar/breakpoint/pry.ex 

defmodule ExDebugToolbar.Breakpoint.Pry do

  @moduledoc false



  def code_snippet(%Macro.Env{file: file, line: line}) do

    case whereami(file, line, 2) do

      {:ok, lines} -> lines

      :error -> []

    end

  end



  defp whereami(file, line, radius)

      when is_binary(file) and is_integer(line) and is_integer(radius) and radius > 0 do

    with true <- File.regular?(file),

         [_ | _] = lines <- whereami_lines(file, line, radius) do

      {:ok, lines}

    else

      _ -> :error

    end

  end



  defp whereami_lines(file, line, radius) do

    min = max(line - radius - 1, 0)

    max = line + radius - 1



    file

    |> File.stream!

    |> Enum.slice(min..max)

    |> Enum.with_index(min + 1)

  end

end