reorganization for easier testing

src/akhamoth.erl

@@ -1,14 +1,17 @@
 -module(akhamoth).
 
--export([compile/1, collect/2]).
+-export([compile_file/1, compile_binary/1, collect/2]).
 
-compile(Path) ->
-    {ok, Src} = file:read_file(Path),
-    Lexer = akh_lexer:new(Src),
-    collect(Lexer, []).
+compile_file(Path) ->
+    {ok, Source} = file:read_file(Path),
+    compile_binary(Source).
 
-collect(Lexer, Acc) ->
-    case akh_lexer:next(Lexer) of
+compile_binary(Source) ->
+    Lx = akh_lexer:new(Source),
+    collect(Lx, []).
+
+collect(Lx, Acc) ->
+    case akh_lexer:next(Lx) of
         none -> Acc;
         {ok, T, L} -> collect(L, [T | Acc])
     end.