[ci] Add ci-run-all label to force full CI matrix (#16421)

script/determine-jobs.py

@@ -1062,22 +1062,42 @@ def main() -> None:
     parser.add_argument(
         "-b", "--branch", help="Branch to compare changed files against"
     )
+    parser.add_argument(
+        "--force-all",
+        action="store_true",
+        help=(
+            "Force every job to run regardless of what changed. Used by CI "
+            "when the ci-run-all label is applied to a PR (escape hatch for "
+            "changes that need full-matrix validation but don't touch enough "
+            "files to trigger it organically)."
+        ),
+    )
     args = parser.parse_args()
 
     # Determine what should run
-    integration_run_all, integration_test_files = determine_integration_tests(
-        args.branch
-    )
+    if args.force_all:
+        integration_run_all, integration_test_files = True, []
+        run_clang_tidy = True
+        run_clang_format = True
+        run_python_linters = True
+        run_import_time = True
+        run_device_builder = True
+        native_idf_components = sorted(NATIVE_IDF_TEST_COMPONENTS)
+        run_native_idf = True
+    else:
+        integration_run_all, integration_test_files = determine_integration_tests(
+            args.branch
+        )
+        run_clang_tidy = should_run_clang_tidy(args.branch)
+        run_clang_format = should_run_clang_format(args.branch)
+        run_python_linters = should_run_python_linters(args.branch)
+        run_import_time = should_run_import_time(args.branch)
+        run_device_builder = should_run_device_builder(args.branch)
+        native_idf_components = native_idf_components_to_test(args.branch)
+        run_native_idf = bool(native_idf_components)
     run_integration, integration_test_buckets = _compute_integration_test_buckets(
         integration_run_all, integration_test_files
     )
-    run_clang_tidy = should_run_clang_tidy(args.branch)
-    run_clang_format = should_run_clang_format(args.branch)
-    run_python_linters = should_run_python_linters(args.branch)
-    run_import_time = should_run_import_time(args.branch)
-    run_device_builder = should_run_device_builder(args.branch)
-    native_idf_components = native_idf_components_to_test(args.branch)
-    run_native_idf = bool(native_idf_components)
     changed_cpp_file_count = count_changed_cpp_files(args.branch)
 
     # Get changed components
@@ -1106,11 +1126,27 @@ def main() -> None:
         changed_components = changed_components_result
         is_core_change = False
 
-    # Filter to only components that have test files
-    # Components without tests shouldn't generate CI test jobs
-    changed_components_with_tests = [
-        component for component in changed_components if _component_has_tests(component)
-    ]
+    if args.force_all:
+        # Force every component with tests into the CI matrix. Each disk entry
+        # under tests/components/<name> is treated as a component; filtered
+        # below by _component_has_tests so components without YAML tests are
+        # still excluded.
+        tests_root = Path(root_path) / ESPHOME_TESTS_COMPONENTS_PATH
+        all_components = sorted(d.name for d in tests_root.iterdir() if d.is_dir())
+        changed_components_with_tests = [
+            component for component in all_components if _component_has_tests(component)
+        ]
+        # Treat as a core change so downstream logic (clang-tidy full scan,
+        # dep expansion) sees the same world as when esphome/core/ changes.
+        is_core_change = True
+    else:
+        # Filter to only components that have test files
+        # Components without tests shouldn't generate CI test jobs
+        changed_components_with_tests = [
+            component
+            for component in changed_components
+            if _component_has_tests(component)
+        ]
 
     # Get directly changed components with tests (for isolated testing)
     # These will be tested WITHOUT --testing-mode in CI to enable full validation
@@ -1143,8 +1179,10 @@ def main() -> None:
     memory_impact = detect_memory_impact_config(args.branch)
 
     # Determine clang-tidy mode based on actual files that will be checked
+    is_full_scan = False
     if run_clang_tidy:
         # Full scan needed if: hash changed OR core files changed
+        # (is_core_change is forced True under --force-all)
         is_full_scan = _is_clang_tidy_full_scan() or is_core_change
 
         if is_full_scan:
@@ -1177,10 +1215,12 @@ def main() -> None:
 
     # Build output
     # Determine which C++ unit tests to run
-    cpp_run_all, cpp_components = determine_cpp_unit_tests(args.branch)
-
-    # Determine if benchmarks should run
-    run_benchmarks = should_run_benchmarks(args.branch)
+    if args.force_all:
+        cpp_run_all, cpp_components = True, []
+        run_benchmarks = True
+    else:
+        cpp_run_all, cpp_components = determine_cpp_unit_tests(args.branch)
+        run_benchmarks = should_run_benchmarks(args.branch)
 
     # Split components into batches for CI testing
     # This intelligently groups components with similar bus configurations
@@ -1219,6 +1259,7 @@ def main() -> None:
         "integration_test_buckets": integration_test_buckets,
         "clang_tidy": run_clang_tidy,
         "clang_tidy_mode": clang_tidy_mode,
+        "clang_tidy_full_scan": is_full_scan,
         "clang_format": run_clang_format,
         "python_linters": run_python_linters,
         "import_time": run_import_time,