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Generating sitemap.xml

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sitemap lib ex_sitemap_generator dsl.ex
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lib/ex_sitemap_generator/dsl.ex 

defmodule Sitemap.DSL do

  defmacro __using__(_opts) do

    quote do

      Module.register_attribute(__MODULE__, :opts, accumulate: true)

      @before_compile unquote(__MODULE__)



      import unquote(__MODULE__)

      import Sitemap.Generator

    end

  end



  defmacro create(contents) do

    contents =

      case contents do

        [do: block] ->

          quote do

            unquote(block); fin

            :ok

          end

        _ ->

          quote do

            try(unquote(contents)); fin

            :ok

          end

      end



    contents = Macro.escape(contents, unquote: true)



    Code.eval_quoted(quote do

      unquote(contents)

    end)

  end



  defmacro alt(name, options) do

    quote do

      @opt {unquote(name), unquote(options)}

    end

  end



  defmacro __before_compile__(env) do

    opts = Module.get_attribute(env.module, :opts)

    quote do

      defp __resource__, do: unquote(opts)

    end

  end

end