split code into modules

aoc_runner.ex

@@ -0,0 +1,15 @@
+defmodule AOCRunner do
+  def run(advent) do
+    result = IO.stream() |> 
+    Enum.reduce_while(
+      advent.init_state(),
+      fn line, acc -> line
+        |> advent.to_command()
+        |> advent.apply_command(acc)
+        |> then(fn acc -> if elem(acc, 2) do {:halt, acc} else {:cont, acc} end end)
+      end
+    )
+
+    IO.puts(advent.get_answer(result))
+  end
+end

day1.ex

@@ -41,14 +41,3 @@ defmodule Exercise1 do
   end
 end
 
-result = IO.stream() |> 
-  Enum.reduce_while(
-    Exercise1.init_state(),
-    fn line, acc -> line
-      |> Exercise1.to_command()
-      |> Exercise1.apply_command(acc)
-      |> then(fn acc -> if elem(acc, 2) do {:halt, acc} else {:cont, acc} end end)
-    end
-  )
-
-  IO.puts(Exercise1.get_answer(result))

main.exs

@@ -0,0 +1,3 @@
+import AOCRunner
+import Exercise1
+AOCRunner.run(Exercise1)