diff --git a/platformio/builder/tools/pioino.py b/platformio/builder/tools/pioino.py
index 7a95da9b..0c1f59a2 100644
--- a/platformio/builder/tools/pioino.py
+++ b/platformio/builder/tools/pioino.py
@@ -225,11 +225,15 @@ class InoToCPPConverter(object):
         return "\n".join(result)
 
 
-def ConvertInoToCpp(env):
+def FindInoNodes(env):
     src_dir = glob.escape(env.subst("$PROJECT_SRC_DIR"))
-    ino_nodes = env.Glob(os.path.join(src_dir, "*.ino")) + env.Glob(
+    return env.Glob(os.path.join(src_dir, "*.ino")) + env.Glob(
         os.path.join(src_dir, "*.pde")
     )
+
+
+def ConvertInoToCpp(env):
+    ino_nodes = env.FindInoNodes()
     if not ino_nodes:
         return
     c = InoToCPPConverter(env)
@@ -247,6 +251,7 @@ def _delete_file(path):
 
 
 def generate(env):
+    env.AddMethod(FindInoNodes)
     env.AddMethod(ConvertInoToCpp)