[ci] Add ESP32 Variants clang-tidy run (S3/P4/C6) (#16825)

.clang-tidy.hash

@@ -1 +1 @@
-d583091c0f465aed86a825138e309af6d9db6834106ab424f36712424a6c2223
+d9c755e5f019b2ecb324834717bc1fb8563e622f5751794cb7156d324884481e

.github/workflows/ci.yml

@@ -722,6 +722,93 @@ jobs:
         run: script/ci-suggest-changes
         if: always()
 
+  clang-tidy-esp32-variants:
+    name: ${{ matrix.name }}
+    runs-on: ubuntu-24.04
+    needs:
+      - common
+      - determine-jobs
+    if: needs.determine-jobs.outputs.clang-tidy == 'true'
+    env:
+      GH_TOKEN: ${{ github.token }}
+      # The variant tidy envs install ESP-IDF natively; share the native IDF cache.
+      ESPHOME_ESP_IDF_PREFIX: ~/.esphome-idf
+    strategy:
+      fail-fast: false
+      max-parallel: 3
+      matrix:
+        include:
+          - id: clang-tidy
+            name: Run script/clang-tidy for ESP32 S3
+            options: --environment esp32s3-idf-tidy --grep USE_ESP32_VARIANT_ESP32S3
+          - id: clang-tidy
+            name: Run script/clang-tidy for ESP32 P4
+            # P4 has no native Wi-Fi/BLE; those run over the hosted co-processor,
+            # so their code paths differ -- lint them under the P4 build too.
+            # yamllint disable-line rule:line-length
+            options: --environment esp32p4-idf-tidy --grep USE_ESP32_VARIANT_ESP32P4 --grep USE_ESP32_HOSTED --grep USE_WIFI --grep USE_BLE
+          - id: clang-tidy
+            name: Run script/clang-tidy for ESP32 C6
+            # yamllint disable-line rule:line-length
+            options: --environment esp32c6-idf-tidy --grep USE_ESP32_VARIANT_ESP32C6 --grep USE_OPENTHREAD --grep USE_ZIGBEE
+
+    steps:
+      - name: Check out code from GitHub
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        with:
+          # Need history for HEAD~1 to work for checking changed files
+          fetch-depth: 2
+
+      - name: Restore Python
+        uses: ./.github/actions/restore-python
+        with:
+          python-version: ${{ env.DEFAULT_PYTHON }}
+          cache-key: ${{ needs.common.outputs.cache-key }}
+
+      - name: Cache ESP-IDF install
+        # Shared with the IDF/Arduino clang-tidy jobs + native-IDF build (same install).
+        uses: ./.github/actions/cache-esp-idf
+
+      - name: Register problem matchers
+        run: |
+          echo "::add-matcher::.github/workflows/matchers/gcc.json"
+          echo "::add-matcher::.github/workflows/matchers/clang-tidy.json"
+
+      - name: Check if full clang-tidy scan needed
+        id: check_full_scan
+        run: |
+          . venv/bin/activate
+          # determine-jobs.clang-tidy-full-scan is true when core C++ changed
+          # OR the ci-run-all label forced --force-all. Independent of the
+          # hash check, both must produce a full scan in the job itself.
+          if [ "${{ needs.determine-jobs.outputs.clang-tidy-full-scan }}" = "true" ]; then
+            echo "full_scan=true" >> $GITHUB_OUTPUT
+            echo "reason=determine_jobs" >> $GITHUB_OUTPUT
+          elif python script/clang_tidy_hash.py --check; then
+            echo "full_scan=true" >> $GITHUB_OUTPUT
+            echo "reason=hash_changed" >> $GITHUB_OUTPUT
+          else
+            echo "full_scan=false" >> $GITHUB_OUTPUT
+            echo "reason=normal" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Run clang-tidy
+        # Limited variant scan: only the files carrying that variant's code paths
+        # (no --all-headers; the comprehensive esp32-idf pass covers the shared tree).
+        run: |
+          . venv/bin/activate
+          if [ "${{ steps.check_full_scan.outputs.full_scan }}" = "true" ]; then
+            echo "Running FULL clang-tidy scan (reason: ${{ steps.check_full_scan.outputs.reason }})"
+            script/clang-tidy --fix ${{ matrix.options }}
+          else
+            echo "Running clang-tidy on changed files only"
+            script/clang-tidy --fix --changed ${{ matrix.options }}
+          fi
+
+      - name: Suggested changes
+        run: script/ci-suggest-changes
+        if: always()
+
   test-build-components-split:
     name: Test components batch (${{ matrix.components }})
     runs-on: ubuntu-24.04
@@ -1273,6 +1360,7 @@ jobs:
       - clang-tidy-single
       - clang-tidy-nosplit
       - clang-tidy-split
+      - clang-tidy-esp32-variants
       - determine-jobs
       - device-builder
       - test-build-components-split

.gitignore

@@ -141,6 +141,7 @@ tests/.esphome/
 
 sdkconfig.*
 !sdkconfig.defaults
+!sdkconfig.defaults.*
 
 .tests/
 

esphome/core/defines.h

@@ -64,6 +64,7 @@
 #define USE_ESP32_BLE_PSRAM
 #define USE_ESP32_CAMERA_JPEG_CONVERSION
 #define USE_ESP32_HOSTED
+#define USE_ESP32_HOSTED_HTTP_UPDATE
 #define USE_ESP32_IMPROV_STATE_CALLBACK
 #define USE_EVENT
 #define USE_FAN
@@ -312,6 +313,7 @@
 #define ESPHOME_WIFI_POWER_SAVE_LISTENERS 2
 #define USE_WIFI_RUNTIME_POWER_SAVE
 #define USB_HOST_MAX_REQUESTS 16
+#define USB_HOST_MAX_PACKET_SIZE 64
 #define USB_UART_OUTPUT_CHUNK_COUNT 5
 
 #ifdef USE_ARDUINO

esphome/espidf/clang_tidy.py

@@ -339,11 +339,18 @@ def _write_tidy_project(
     # ESPHome's static-analysis sdkconfig (repo root): enables the flags any
     # component sets (e.g. CONFIG_BT_ENABLED) so sdkconfig-gated IDF components
     # register and expose their includes. IDF reads ``sdkconfig.defaults`` from
-    # the project root.
+    # the project root, plus a per-target ``sdkconfig.defaults.<idf_target>``
+    # for variant-only components (e.g. openthread on c6/h2).
+    repo_root = esphome_dir.parent
     (work_dir / "sdkconfig.defaults").write_text(
-        (esphome_dir.parent / "sdkconfig.defaults").read_text(encoding="utf-8"),
+        (repo_root / "sdkconfig.defaults").read_text(encoding="utf-8"),
         encoding="utf-8",
     )
+    target_defaults = repo_root / f"sdkconfig.defaults.{settings.idf_target}"
+    if target_defaults.is_file():
+        (work_dir / target_defaults.name).write_text(
+            target_defaults.read_text(encoding="utf-8"), encoding="utf-8"
+        )
 
 
 def _generate_compile_commands(

platformio.ini

@@ -392,6 +392,17 @@ build_flags =
     ${flags:runtime.build_flags}
     -DUSE_ESP32_VARIANT_ESP32P4
 
+[env:esp32p4-idf-tidy]
+extends = common:esp32-idf
+board = esp32-p4-evboard
+board_build.esp-idf.sdkconfig_path = .temp/sdkconfig-esp32p4-idf-tidy
+build_flags =
+    ${common:esp32-idf.build_flags}
+    ${flags:clangtidy.build_flags}
+    -DUSE_ESP32_VARIANT_ESP32P4
+build_unflags =
+    ${common.build_unflags}
+
 ;;;;;;;; ESP32-S2 ;;;;;;;;
 
 [env:esp32s2-arduino]

script/clang_tidy_hash.py

@@ -99,11 +99,12 @@ def calculate_clang_tidy_hash(repo_root: Path | None = None) -> str:
     platformio_content = read_file_bytes(platformio_path)
     hasher.update(platformio_content)
 
-    # Hash sdkconfig.defaults file
-    sdkconfig_path = repo_root / "sdkconfig.defaults"
-    if sdkconfig_path.exists():
-        sdkconfig_content = read_file_bytes(sdkconfig_path)
-        hasher.update(sdkconfig_content)
+    # Hash sdkconfig.defaults and any per-target sdkconfig.defaults.<target>:
+    # the per-target files flip CONFIG flags that change which variant code
+    # paths clang-tidy sees. Include the filename so a rename is detected.
+    for sdkconfig_path in sorted(repo_root.glob("sdkconfig.defaults*")):
+        hasher.update(sdkconfig_path.name.encode())
+        hasher.update(read_file_bytes(sdkconfig_path))
 
     # Hash esphome/idf_component.yml: its managed deps drive the ESP-IDF
     # build's include set, which clang-tidy analyzes.

sdkconfig.defaults

@@ -15,8 +15,3 @@ CONFIG_BT_ENABLED=y
 
 # esp32_camera
 CONFIG_SPIRAM=y
-
-# zigbee
-CONFIG_ZB_ENABLED=y
-CONFIG_ZB_ZED=y
-CONFIG_ZB_RADIO_NATIVE=y

sdkconfig.defaults.esp32c6

@@ -0,0 +1,14 @@
+# Per-target ESP-IDF sdkconfig defaults for esp32c6 static analysis (clang-tidy) only.
+# Read by IDF in addition to sdkconfig.defaults. Enables variant-only components so
+# their headers register for the tidy translation unit (these are normally set at
+# codegen via add_idf_sdkconfig_option, which the stub tidy build skips).
+
+# openthread (only the C6/H2 variants have the 802.15.4 radio)
+CONFIG_IEEE802154_ENABLED=y
+CONFIG_OPENTHREAD_ENABLED=y
+CONFIG_OPENTHREAD_RADIO_NATIVE=y
+
+# zigbee
+CONFIG_ZB_ENABLED=y
+CONFIG_ZB_ZED=y
+CONFIG_ZB_RADIO_NATIVE=y

sdkconfig.defaults.esp32p4

@@ -0,0 +1,31 @@
+# Per-target ESP-IDF sdkconfig defaults for esp32p4 static analysis (clang-tidy) only.
+# Read by IDF in addition to sdkconfig.defaults. Enables variant-only components so
+# their headers register for the tidy translation unit (these are normally set at
+# codegen via add_idf_sdkconfig_option, which the stub tidy build skips).
+
+# esp32_hosted (P4 has no native Wi-Fi; it drives a co-processor over SDIO/SPI).
+# Mirrors a default SDIO 4-bit setup (slot 1, ESP32-C6 slave) so the esp_hosted
+# code paths compile under static analysis.
+CONFIG_SLAVE_IDF_TARGET_ESP32C6=y
+CONFIG_ESP_HOSTED_SDIO_SLOT_1=y
+CONFIG_ESP_HOSTED_SDIO_4_BIT_BUS=y
+CONFIG_ESP_HOSTED_CUSTOM_SDIO_PINS=y
+CONFIG_ESP_HOSTED_SDIO_CLOCK_FREQ_KHZ=40000
+CONFIG_ESP_HOSTED_SDIO_RESET_ACTIVE_HIGH=y
+CONFIG_ESP_HOSTED_SDIO_GPIO_RESET_SLAVE=54
+CONFIG_ESP_HOSTED_PRIV_SDIO_PIN_CLK_SLOT_1=18
+CONFIG_ESP_HOSTED_PRIV_SDIO_PIN_CMD_SLOT_1=19
+CONFIG_ESP_HOSTED_PRIV_SDIO_PIN_D0_SLOT_1=14
+CONFIG_ESP_HOSTED_PRIV_SDIO_PIN_D1_4BIT_BUS_SLOT_1=15
+CONFIG_ESP_HOSTED_PRIV_SDIO_PIN_D2_4BIT_BUS_SLOT_1=16
+CONFIG_ESP_HOSTED_PRIV_SDIO_PIN_D3_4BIT_BUS_SLOT_1=17
+
+# BLE runs over the hosted co-processor on P4 (no native BT controller), so
+# esp32_ble_tracker must take the hosted bluedroid path instead of <esp_bt.h>.
+CONFIG_ESP_HOSTED_ENABLE_BT_BLUEDROID=y
+
+# tinyusb CDC (usb_cdc_acm), same as esp32s3
+CONFIG_TINYUSB_CDC_ENABLED=y
+CONFIG_TINYUSB_CDC_COUNT=1
+CONFIG_TINYUSB_CDC_RX_BUFSIZE=256
+CONFIG_TINYUSB_CDC_TX_BUFSIZE=256

sdkconfig.defaults.esp32s3

@@ -0,0 +1,12 @@
+# Per-target ESP-IDF sdkconfig defaults for esp32s3 static analysis (clang-tidy) only.
+# Read by IDF in addition to sdkconfig.defaults. Enables variant-only components so
+# their headers register for the tidy translation unit (these are normally set at
+# codegen via add_idf_sdkconfig_option, which the stub tidy build skips).
+
+# tinyusb CDC (usb_cdc_acm) -- the esp_tinyusb managed component is already in
+# esphome/idf_component.yml; these enable its CDC class so tud_cdc_* and the
+# CONFIG_TINYUSB_CDC_* macros are declared.
+CONFIG_TINYUSB_CDC_ENABLED=y
+CONFIG_TINYUSB_CDC_COUNT=1
+CONFIG_TINYUSB_CDC_RX_BUFSIZE=256
+CONFIG_TINYUSB_CDC_TX_BUFSIZE=256

tests/script/test_clang_tidy_hash.py

@@ -63,6 +63,7 @@ def test_calculate_clang_tidy_hash_with_sdkconfig(tmp_path: Path) -> None:
     expected_hasher.update(clang_tidy_content)
     expected_hasher.update(requirements_version.encode())
     expected_hasher.update(platformio_content)
+    expected_hasher.update(b"sdkconfig.defaults")
     expected_hasher.update(sdkconfig_content)
     expected_hash = expected_hasher.hexdigest()
 
@@ -71,6 +72,29 @@ def test_calculate_clang_tidy_hash_with_sdkconfig(tmp_path: Path) -> None:
     assert result == expected_hash
 
 
+def test_calculate_clang_tidy_hash_includes_per_target_sdkconfig(
+    tmp_path: Path,
+) -> None:
+    """Per-target sdkconfig.defaults.<target> files must be part of the hash."""
+    (tmp_path / ".clang-tidy").write_bytes(b"Checks: '-*'\n")
+    (tmp_path / "platformio.ini").write_bytes(b"[env:esp32]\n")
+    (tmp_path / "requirements_dev.txt").write_text("clang-tidy==18.1.5\n")
+    (tmp_path / "sdkconfig.defaults").write_bytes(b"CONFIG_BASE=y\n")
+
+    before = clang_tidy_hash.calculate_clang_tidy_hash(repo_root=tmp_path)
+
+    # Adding a per-target file must change the hash.
+    per_target = tmp_path / "sdkconfig.defaults.esp32c6"
+    per_target.write_bytes(b"CONFIG_OPENTHREAD_ENABLED=y\n")
+    after_add = clang_tidy_hash.calculate_clang_tidy_hash(repo_root=tmp_path)
+    assert after_add != before
+
+    # Editing the per-target file must change the hash again.
+    per_target.write_bytes(b"CONFIG_OPENTHREAD_ENABLED=n\n")
+    after_edit = clang_tidy_hash.calculate_clang_tidy_hash(repo_root=tmp_path)
+    assert after_edit != after_add
+
+
 def test_calculate_clang_tidy_hash_without_sdkconfig(tmp_path: Path) -> None:
     """Test calculating hash without sdkconfig.defaults file."""
     clang_tidy_content = b"Checks: '-*,readability-*'\n"

tests/unit_tests/test_espidf_clang_tidy.py

@@ -1,24 +1,51 @@
-"""Tests for esphome.espidf.clang_tidy tidy-project setup."""
+"""Tests for esphome.espidf.clang_tidy tidy-project generation."""
 
 import os
 from pathlib import Path
 
 import pytest
 
-from esphome.espidf.clang_tidy import _Settings, _setup_core
+from esphome.espidf.clang_tidy import _Settings, _setup_core, _write_tidy_project
+
+REPO_ROOT = Path(__file__).resolve().parents[2]
 
 
-def _settings(target_framework: str) -> _Settings:
+def _settings(idf_target: str = "esp32", target_framework: str = "espidf") -> _Settings:
     return _Settings(
-        idf_target="esp32",
-        variant="ESP32",
+        idf_target=idf_target,
+        variant=idf_target.upper(),
         idf_version="5.5.4",
         target_framework=target_framework,
-        platform_defines=("USE_ESP32",),
+        platform_defines=(
+            "USE_ESP32",
+            f"USE_ESP32_VARIANT_{idf_target.upper()}",
+            "USE_ESP_IDF",
+        ),
         framework_deps={},
     )
 
 
+def test_write_tidy_project_copies_base_sdkconfig(tmp_path: Path) -> None:
+    """The shared sdkconfig.defaults is always copied; no per-target file for esp32."""
+    _write_tidy_project(tmp_path, [], {}, _settings("esp32"))
+
+    assert (tmp_path / "sdkconfig.defaults").is_file()
+    # esp32 has no sdkconfig.defaults.esp32, so nothing extra is copied.
+    assert not (tmp_path / "sdkconfig.defaults.esp32").exists()
+
+
+def test_write_tidy_project_copies_per_target_sdkconfig(tmp_path: Path) -> None:
+    """A repo-root sdkconfig.defaults.<target> is also copied into the build dir."""
+    _write_tidy_project(tmp_path, [], {}, _settings("esp32c6"))
+
+    target = tmp_path / "sdkconfig.defaults.esp32c6"
+    assert (tmp_path / "sdkconfig.defaults").is_file()
+    assert target.is_file()
+    assert target.read_text(encoding="utf-8") == (
+        REPO_ROOT / "sdkconfig.defaults.esp32c6"
+    ).read_text(encoding="utf-8")
+
+
 @pytest.mark.parametrize(
     ("target_framework", "expected"),
     [("arduino", "1"), ("espidf", "0")],
@@ -34,6 +61,6 @@ def test_setup_core_sets_arduino_env(
     # restored after the test instead of leaking into later tests.
     monkeypatch.delenv("ESPHOME_ARDUINO", raising=False)
 
-    _setup_core(tmp_path / "proj", _settings(target_framework))
+    _setup_core(tmp_path / "proj", _settings(target_framework=target_framework))
 
     assert os.environ["ESPHOME_ARDUINO"] == expected