ci: build: optimizations to make builds more robust

Take inspiration from the Arduino's fork [1] to improve the
CI for building and testing samples in the project

Signed-off-by: Dhruva Gole <[email protected]>

Author: DhruvaG2000

.github/workflows/build.yml

@@ -12,24 +12,43 @@ jobs:
           docker volume prune -f
 
   build:
+    name: Build Arduino-API Zephyr samples
     runs-on: ubuntu-latest
-    container: zephyrprojectrtos/ci:latest
+    container: zephyrprojectrtos/ci-base:latest
     env:
       CMAKE_PREFIX_PATH: /opt/toolchains
+      CCACHE_IGNOREOPTIONS: -specs=*
+      MODULE_PATH: ../modules/lib/ArduinoCore-zephyr
+
     steps:
       - name: Checkout
         uses: actions/checkout@v4
         with:
-          path: Arduino-Zephyr-API
+          fetch-depth: 0
+          persist-credentials: false
+          path: subfolder
+
+      - name: Fix module path, list needed HALs
+        run: |
+          mkdir -p $(dirname $MODULE_PATH) && mv subfolder $MODULE_PATH
+          NEEDED_HALS=$(grep 'build.zephyr_hals=' $MODULE_PATH/boards.txt | cut -d '=' -f 2 | xargs -n 1 echo | sort -u)
+          HAL_FILTER="-hal_.*"
+          for hal in $NEEDED_HALS; do
+            HAL_FILTER="$HAL_FILTER,+$hal"
+          done
+          echo "HAL_FILTER=$HAL_FILTER" | tee -a $GITHUB_ENV
+
+      - name: Setup Zephyr project
+        uses: zephyrproject-rtos/action-zephyr-setup@v1
+        with:
+          toolchains: arm-zephyr-eabi
+          manifest-file-name: ${{ env.MODULE_PATH }}/west.yml
+          west-project-filter: ${{ env.HAL_FILTER }}
+          enable-ccache: false
 
-      - name: Initialize
+      - name: Add manifest path as module
         run: |
-          west init -l Arduino-Zephyr-API/
-          west update
-          git clone https://github.com/arduino/ArduinoCore-API.git ArduinoCore-API
-          mkdir -p modules/lib
-          ln -s Arduino-Zephyr-API modules/lib/
-          cp -rfp ArduinoCore-API/api Arduino-Zephyr-API/cores/arduino/
+          echo EXTRA_ZEPHYR_MODULES="$(pwd)/$MODULE_PATH" >> $GITHUB_ENV
 
       - name: Build fade
         working-directory: Arduino-Zephyr-API