chore: make simslip param driven

Author: YogendraShelke

.github/workflows/ios.yml

@@ -7,6 +7,9 @@ env:
   DEVICE_MODEL: 'iPhone 17'
   IOS_VERSION: '26.2'
   USE_CCACHE: 1
+  # simslim slimming is temporarily disabled while we confirm whether it is what
+  # stops the app from requesting its Metro bundle. Set to 'true' to re-enable.
+  SIMSLIM_ENABLED: 'false'
 
 jobs:
   ios:
@@ -48,6 +51,7 @@ jobs:
         run: yarn pod
 
       - name: "Optimize simulator with simslim"
+        if: env.SIMSLIM_ENABLED == 'true'
         run: |
           if ! command -v jq &> /dev/null; then
             brew install jq
@@ -106,9 +110,43 @@ jobs:
           sleep 10
           echo "Ready to run tests"
 
+      # Diagnostics for "the app did not request its Metro bundle" failures. The
+      # harness only reports that no bundle request arrived, not why, so record the
+      # simulator-side state it depends on before the tests run.
+      - name: Simulator diagnostics
+        run: |
+          echo "--- booted devices (more than one makes 'booted' ambiguous) ---"
+          xcrun simctl list devices | grep -i booted || echo "(none)"
+
+          echo "--- app install state on ${SIMULATOR_UDID} ---"
+          xcrun simctl get_app_container "$SIMULATOR_UDID" mendixnative.example 2>&1 || \
+            echo "::warning::app container not found on target simulator"
+
+          echo "--- simslim status (skipped when slimming is disabled) ---"
+          if [ "${SIMSLIM_ENABLED}" = "true" ] && command -v simslim &> /dev/null; then
+            simslim status "$SIMULATOR_UDID" || true
+          else
+            echo "(slimming disabled)"
+          fi
+
       # Run tests
       - name: Run Harness E2E tests
         working-directory: example
         run: |
+          # An earlier run exceeded Node's default ~2GB old-space limit while the
+          # harness retried launches. Raising the ceiling keeps a retry loop from
+          # presenting as an OOM instead of the real timeout.
           export NODE_OPTIONS="--max-old-space-size=6144"
+          # Harness debug logging names the resolved simulator, the RCT_jsLocation
+          # override, and each Metro request — what identifies a missing bundle request.
+          export DEBUG="react-native-harness:*"
           yarn harness:ios
+
+      # Capture the app's own logs when the run fails: if the app launched but never
+      # asked Metro for a bundle, the reason shows up on the simulator side.
+      - name: Collect app logs on failure
+        if: failure()
+        run: |
+          xcrun simctl spawn "$SIMULATOR_UDID" log show --last 25m --style compact \
+            --predicate 'process == "MendixNativeExample"' 2>&1 | tail -300 || \
+            echo "(no app logs available)"