github/workflows: Add esp32 to code size report.

Add an esp32 build (specifically ESP32_GENERIC) to the CI code-size check.
Multiple new steps must be done to prepare for building esp32, and caching
is used to speed up both the install of the IDF and the build process.

Signed-off-by: Jeff Epler <jepler@unpythonic.net>

.github/workflows/code_size.yml

@@ -30,6 +30,30 @@ jobs:
         fetch-depth: 100
     - name: Install packages
       run: tools/ci.sh code_size_setup
+
+    # Needs to be kept in synch with ports_esp32.yml
+    - id: idf_ver
+      name: Read the ESP-IDF version (including Python version) and set outputs.IDF_VER
+      run: tools/ci.sh esp32_idf_ver | tee "${GITHUB_OUTPUT}"
+    - name: Cached ESP-IDF install
+      id: cache_esp_idf
+      uses: actions/cache@v4
+      with:
+        path: |
+          ./esp-idf/
+          ~/.espressif/
+          !~/.espressif/dist/
+          ~/.cache/pip/
+        key: esp-idf-${{ steps.idf_ver.outputs.IDF_VER }}
+    - name: Install ESP-IDF packages
+      if: steps.cache_esp_idf.outputs.cache-hit != 'true'
+      run: tools/ci.sh esp32_idf_setup
+
+    - name: ccache
+      uses: hendrikmuhs/ccache-action@v1.2
+      with:
+        key: code_size
+
     - name: Build
       run: tools/ci.sh code_size_build
     - name: Compute code size difference

.github/workflows/ports_esp32.yml

@@ -35,6 +35,7 @@ jobs:
     steps:
     - uses: actions/checkout@v6
 
+    # Needs to be kept in synch with code_size.yml
     - id: idf_ver
       name: Read the ESP-IDF version (including Python version) and set outputs.IDF_VER
       run: tools/ci.sh esp32_idf_ver | tee "${GITHUB_OUTPUT}"
@@ -54,6 +55,7 @@ jobs:
       if: steps.cache_esp_idf.outputs.cache-hit != 'true'
       run: tools/ci.sh esp32_idf_setup
 
+    # Needs to be kept in synch with code_size.yml
     - name: ccache
       uses: hendrikmuhs/ccache-action@v1.2
       with:

tools/ci.sh

@@ -87,7 +87,7 @@ function _ci_is_git_merge {
 function ci_code_size_build {
     # check the following ports for the change in their code size
     # Override the list by setting PORTS_TO_CHECK in the environment before invoking ci.
-    : ${PORTS_TO_CHECK:=bmusxpdv}
+    : ${PORTS_TO_CHECK:=bmus3xpdv}
     
     SUBMODULES="lib/asf4 lib/berkeley-db-1.xx lib/btstack lib/cyw43-driver lib/lwip lib/mbedtls lib/micropython-lib lib/nxp_driver lib/pico-sdk lib/stm32lib lib/tinyusb"