🔨 Simplify generic variants, update DFU tool (#27502)

buildroot/share/PlatformIO/scripts/generic_create_variant.py

@@ -40,26 +40,17 @@ if pioutil.is_pio_build():
     FRAMEWORK_DIR = Path(platform.get_package_dir(platform_name))
     assert FRAMEWORK_DIR.is_dir()
 
+    #
+    # Point variants_dir to our variant folder when board_build.variant
+    # is provided and the variant name begins with "marlin_".
+    #
     board = env.BoardConfig()
-
-    #mcu_type = board.get("build.mcu")[:-2]
     variant = board.get("build.variant")
+    #mcu_type = board.get("build.mcu")[:-2]
     #series = mcu_type[:7].upper() + "xx"
 
-    # Only prepare a new variant if the PlatformIO configuration provides it (board_build.variant).
-    # This check is important to avoid deleting official board config variants.
+    # Make sure the local variant sub-folder exists
     if marlin_variant_pattern.match(str(variant).lower()):
-        # Prepare a new empty folder at the destination
-        variant_dir = FRAMEWORK_DIR / "variants" / variant
-        if variant_dir.is_dir():
-            shutil.rmtree(variant_dir)
-        if not variant_dir.is_dir():
-            variant_dir.mkdir()
-
-        # Source dir is a local variant sub-folder
         source_dir = Path("buildroot/share/PlatformIO/variants", variant)
         assert source_dir.is_dir()
-
-        print("Copying variant " + str(variant) + " to framework directory...")
-
-        marlin.copytree(source_dir, variant_dir)
+        board.update("build.variants_dir", "buildroot/share/PlatformIO/variants");