🔨 Fix updated build script (MarlinFirmware#26423)

Followup to MarlinFirmware#26265

Co-authored-by: Scott Lahteine <[email protected]>

.github/workflows/test-builds.yml

@@ -118,6 +118,7 @@ jobs:
 
         # STM32H7
         - BTT_SKR_SE_BX
+        - STM32H743VI_btt
 
         # STM32F1 (Maple)
         - jgaurora_a5s_a1_maple

buildroot/share/PlatformIO/scripts/generic_create_variant.py

@@ -31,11 +31,11 @@
         }
         platform_name = framewords[platform.__class__.__name__]
     else:
-        uri = PackageSpec(platform_packages[0]).uri
-        if '@' in uri:
-            platform_name = re.sub(r'@.+', '' , uri)
+        spec = PackageSpec(platform_packages[0])
+        if spec.uri and '@' in spec.uri:
+            platform_name = re.sub(r'@.+', '', spec.uri)
         else:
-            platform_name = PackageSpec(platform_packages[0]).name
+            platform_name = spec.name
 
     FRAMEWORK_DIR = Path(platform.get_package_dir(platform_name))
     assert FRAMEWORK_DIR.is_dir()

buildroot/tests/STM32H743VI_btt

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+#
+# Build tests for STM32H743VI_btt
+# Ender-5 Plus with SKR V3.0 (STM32H7)
+#
+
+# exit on first failure
+set -e
+
+#
+# Build with the default configurations
+#
+use_example_configs "Creality/Ender-5 Plus/BigTreeTech SKR 3"
+exec_test $1 $2 "Creality Ender-5 Plus with BigTreeTech SKR 3" "$3"
+
+# clean up
+restore_configs