only clean/checkout/download artifacts on first attempt

.github/workflows/build.yml

@@ -199,26 +199,20 @@ jobs:
     runs-on: [self-hosted, X64, hathach, hardware-in-the-loop]
     steps:
       - name: Clean workspace
+        if: github.run_attempt == '1'
         run: |
-          # Skip boards that passed with previous run
-          if [ -f ${{ env.HIL_JSON }}.skip ]; then
-            SKIP_ARGS=$(cat "${HIL_JSON}.skip")
-          else
-            SKIP_ARGS=""
-          fi
-          echo "SKIP_ARGS=$SKIP_ARGS"
-          echo "SKIP_ARGS=$SKIP_ARGS" >> $GITHUB_ENV
-
-          echo "Cleaning up previous run"
+          echo "Cleaning up for the first run"
           rm -rf "${{ github.workspace }}"
           mkdir -p "${{ github.workspace }}"
 
       - name: Checkout TinyUSB
+        if: github.run_attempt == '1'
         uses: actions/checkout@v4
         with:
           sparse-checkout: test/hil
 
       - name: Download Artifacts
+        if: github.run_attempt == '1'
         uses: actions/download-artifact@v4
         with:
           path: cmake-build
@@ -227,7 +221,15 @@ jobs:
       - name: Test on actual hardware
         run: |
           ls cmake-build/
-          python3 test/hil/hil_test.py ${{ env.HIL_JSON }} $SKIP_ARGS
+
+          # Skip boards that passed with previous run, file is generated by hil_test.py
+          SKIP_BOARDS=""
+          if [ -f ${{ env.HIL_JSON }}.skip ]; then
+            SKIP_BOARDS=$(cat "${HIL_JSON}.skip")
+          fi
+          echo "SKIP_BOARDS=$SKIP_BOARDS"
+
+          python3 test/hil/hil_test.py ${{ env.HIL_JSON }} $SKIP_BOARDS
 
   # ---------------------------------------
   # Hardware in the loop (HIL)