loadModule for __init__.py and bs

`loadModule` loads the file directly instead of searching in
a directory.

__init__.py

@@ -406,12 +406,9 @@ def write(s):
 	with open(CACHE, "bw") as file:
 		pickle.dump(cache, file)
 
-def main():
+def main(loadModule):
 	if entry := first(entry for entry in ["bs", "bs.py"] if path.exists(entry)):
-		entry = path.abspath(entry)
-		with open(entry) as source: script = compile(source.read(), entry, "exec")
-
-		try: exec(script, exports)
+		try: loadModule("bs", entry)
 		except Exception as e:
 			tb = e.__traceback__
 			while tb and tb.tb_frame.f_code.co_filename != entry: tb = tb.tb_next

__main__.py

@@ -1,15 +1,12 @@
 #!/usr/bin/env python
-import os.path as path
+import os.path as osp
 import sys
-from importlib import util as ilu, machinery as ilm
+from importlib import machinery as ilm
 
-def main():
-	if not (bt := sys.modules.get("bt", None)):
-		spec = ilm.PathFinder().find_spec("bt", [path.dirname(path.dirname(path.realpath(__file__)))])
-		bt = ilu.module_from_spec(spec)
-		sys.modules[bt.__name__] = bt
-		spec.loader.exec_module(bt)
+def loadModule(name, path):
+	return ilm.SourceFileLoader(name, path).load_module()
 
-	bt.main()
+def main():
+	(sys.modules.get("bt", None) or loadModule("bt", osp.join(osp.dirname(osp.realpath(__file__)), "__init__.py"))).main(loadModule)
 
 if __name__ == "__main__": main()