fix: Fettling - now attempting to restore CRC16 take 2

Author: milesburton

.github/workflows/arduino-ci.yml

@@ -15,7 +15,6 @@ jobs:
           mkdir -p $GITHUB_WORKSPACE/libraries
           mkdir -p $GITHUB_WORKSPACE/.arduino15
           mkdir -p $GITHUB_WORKSPACE/Arduino
-          mkdir -p $GITHUB_WORKSPACE/libraries/OneWire/util
       - name: Setup Arduino CLI
         uses: arduino/setup-arduino-cli@v1
       - name: Configure Arduino CLI and install cores
@@ -29,10 +28,15 @@ jobs:
       - name: Install OneWire library
         run: |
           arduino-cli lib install OneWire
-          # Create symlinks to AVR utilities
-          sudo ln -s /usr/lib/avr/include/util/crc16.h /home/runner/Arduino/libraries/OneWire/util/
-          sudo ln -s /usr/lib/avr/include/util /home/runner/Arduino/libraries/OneWire/
-          # Debug: check the symlinks
+          # Debug: Show initial contents
+          echo "Initial OneWire util directory contents:"
+          ls -la /home/runner/Arduino/libraries/OneWire/util/
+          # Only create symlink for crc16.h if it doesn't exist
+          if [ ! -f "/home/runner/Arduino/libraries/OneWire/util/crc16.h" ]; then
+            sudo ln -s /usr/lib/avr/include/util/crc16.h /home/runner/Arduino/libraries/OneWire/util/
+          fi
+          # Debug: Show final contents
+          echo "Final OneWire util directory contents:"
           ls -la /home/runner/Arduino/libraries/OneWire/util/
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1