error

** (CompileError) test/script_test.exs:8: function content/0 undefined
    (stdlib) lists.erl:1336: :lists.foreach/2
    (stdlib) erl_eval.erl:657: :erl_eval.do_apply/6
    (stdlib) erl_eval.erl:121: :erl_eval.exprs/5

gistfile1.ex

defmodule Exredis.Script do
  defmacro __using__(_) do
    quote do
      import Exredis.Script
    end
  end

  defmacro defredis_script(name, file_path: file_path) do
    quote do
      {:ok, content} = File.read(unquote(file_path))
      defredis_script(unquote(name), content)
    end
  end
  defmacro defredis_script(name, script) do
    quote do
      @script_sha :crypto.hash(:sha, unquote(script))
      def unquote(name)(client, keys \\ [], argv \\ []) do
        query_args = [length(keys)] ++ keys ++ argv
        case Exredis.query client, ["EVALSHA", @script_sha] ++ query_args do
          <<"NOSCRIPT", _ :: binary>> ->
            Exredis.query client, ["EVAL", unquote(script)] ++ query_args
          reply -> reply
        end
      end
    end
  end
end

Macro.expand

  {:ok, content} = File.read("test/example_script.lua")
  defredis_script(:return_one_file, content)

defmodule Exredis.Script do
  defmacro __using__(_) do
    quote do
      import Exredis.Script
    end
  end

  defmacro defredis_script(name, file_path: file_path) do
    {:ok, content} = File.read(file_path)
    quote do
      defredis_script(unquote(name), unquote(content))
    end
  end
  defmacro defredis_script(name, script) do
    quote do
      @script_sha :crypto.hash(:sha, unquote(script))
      def unquote(name)(client, keys \\ [], argv \\ []) do
        query_args = [length(keys)] ++ keys ++ argv
        case Exredis.query client, ["EVALSHA", @script_sha] ++ query_args do
          <<"NOSCRIPT", _ :: binary>> ->
            Exredis.query client, ["EVAL", unquote(script)] ++ query_args
          reply -> reply
        end
      end
    end
  end
end