fix

script/analyze_component_buses.py

@@ -40,6 +40,15 @@ from esphome.config_helpers import Extend, Remove
 # Path to common bus configs
 COMMON_BUS_PATH = Path("tests/test_build_components/common")
 
+# Components that must be tested in isolation (not grouped or batched with others)
+# These have known build issues that prevent grouping
+# NOTE: This should be kept in sync with both test_build_components and split_components_for_ci.py
+ISOLATED_COMPONENTS = {
+    "camera_encoder": "Multiple definition errors: esp32-camera IDF component conflicts with ESPHome camera component",
+    "camera": "Uses relative include paths that break when merged with other components",
+    "esphome": "Defines devices/areas in esphome: section that are referenced in other sections - breaks when merged",
+}
+
 
 @lru_cache(maxsize=1)
 def get_common_bus_packages() -> frozenset[str]:

script/split_components_for_ci.py

@@ -21,19 +21,11 @@ import sys
 sys.path.insert(0, str(Path(__file__).parent.parent))
 
 from script.analyze_component_buses import (
+    ISOLATED_COMPONENTS,
     analyze_all_components,
     create_grouping_signature,
 )
 
-# Components that must be tested in isolation (not grouped or batched with others)
-# These have known build issues that prevent grouping
-# NOTE: This should be kept in sync with ISOLATED_COMPONENTS in test_build_components
-ISOLATED_COMPONENTS = {
-    "camera_encoder": "Multiple definition errors: esp32-camera IDF component conflicts with ESPHome camera component",
-    "camera": "Uses relative include paths that break when merged with other components",
-    "esphome": "Defines devices/areas in esphome: section that are referenced in other sections - breaks when merged",
-}
-
 
 def has_test_files(component_name: str, tests_dir: Path) -> bool:
     """Check if a component has test files.
@@ -94,26 +86,16 @@ def create_intelligent_batches(
     signature_groups: dict[str, list[str]] = defaultdict(list)
 
     for component in components_with_tests:
-        # Components in ISOLATED_COMPONENTS can share a batch/runner with others
+        # Components that can't be grouped get unique signatures
-        # but won't be grouped/merged - they're tested individually
+        # This includes both manually curated ISOLATED_COMPONENTS and
-        # Give each one a unique signature so they can be batched but not grouped
+        # automatically detected non_groupable components
-        if component in ISOLATED_COMPONENTS:
+        # These can share a batch/runner but won't be grouped/merged
+        if component in ISOLATED_COMPONENTS or component in non_groupable:
             signature_groups[f"isolated_{component}"].append(component)
             continue
 
-        # Components that can't be grouped (use local files, etc.)
-        # Also get unique signatures
-        if component in non_groupable:
-            signature_groups[f"isolated_{component}"].append(component)
-            continue
-
-        if component not in component_buses:
-            # Component has no bus configs, put in "no_buses" group
-            # These components CAN be grouped together
-            signature_groups["no_buses"].append(component)
-            continue
-
         # Get signature from any platform (they should all have the same buses)
+        # Components not in component_buses were filtered out by has_test_files check
         comp_platforms = component_buses[component]
         for platform, buses in comp_platforms.items():
             if buses:
@@ -149,9 +131,9 @@ def create_intelligent_batches(
 
     # Flatten all groups in signature-sorted order
     # Components within each signature group stay in their natural order
-    all_components = []
+    all_components = [
-    for signature, group_components in sorted_groups:
+        comp for _, group_components in sorted_groups for comp in group_components
-        all_components.extend(group_components)
+    ]
 
     # Split into batches of batch_size
     # Isolated components are included in all_components (in "isolated" group)

script/test_build_components.py

@@ -27,6 +27,7 @@ sys.path.insert(0, str(Path(__file__).parent.parent))
 
 # pylint: disable=wrong-import-position
 from script.analyze_component_buses import (
+    ISOLATED_COMPONENTS,
     analyze_all_components,
     create_grouping_signature,
     is_platform_component,
@@ -34,14 +35,6 @@ from script.analyze_component_buses import (
 )
 from script.merge_component_configs import merge_component_configs
 
-# Components that must be tested in isolation (not grouped)
-# These have known build issues that prevent grouping
-ISOLATED_COMPONENTS = {
-    "camera_encoder": "Multiple definition errors: esp32-camera IDF component conflicts with ESPHome camera component (buffer_impl.cpp symbols defined in both src/camera/ and src/esphome/components/camera/)",
-    "camera": "Uses relative include paths that break when merged with other components",
-    "esphome": "Defines devices/areas in esphome: section that are referenced in other sections - breaks when merged",
-}
-
 
 def find_component_tests(
     components_dir: Path, component_pattern: str = "*"