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process_hub

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Distributed processes manager and global process registry

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process_hub lib process_hub injector.ex
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lib/process_hub/injector.ex 

defmodule ProcessHub.Injector do

  defmacro __using__(opts) do

    quote do

      Module.put_attribute(__MODULE__, :base_module, unquote(opts[:base_module]))

      Module.put_attribute(__MODULE__, :overrides, unquote(opts[:override]))



      @before_compile ProcessHub.Injector

    end

  end



  defmacro __before_compile__(env) do

    base_module = Module.get_attribute(env.module, :base_module) || []

    overrides = Module.get_attribute(env.module, :overrides) || []



    exports =

      Macro.expand(base_module, __ENV__).module_info(:exports)

      |> Enum.filter(fn {func, _} -> func not in overrides end)



    for {func, arity} <- exports, func not in ~w|module_info __info__|a do

      args = for i <- 0..arity, i > 0, do: Macro.var(:"arg#{i}", __MODULE__)



      quote do

        defdelegate unquote(func)(unquote_splicing(args)), to: unquote(base_module)

      end

    end

  end

end