Modernize iOS CI workflow

- Bump actions/checkout v2 → v4 (silences Node 20 deprecation warning).
- Pin runner to macos-15 and select Xcode via maxim-lobanov/setup-xcode
  (latest-stable), so the build runs against the latest available Xcode
  rather than whatever macos-latest happens to alias to.
- Add concurrency cancel-in-progress to drop superseded PR runs.
- Replace the inline shell hacks with a small JSON-based simulator
  picker that returns a UDID (sturdier than name parsing).
- Pipe xcodebuild through xcbeautify for readable test output, and pass
  CODE_SIGNING_ALLOWED=NO so CI never tries to sign.

Author: ssathy2

.github/workflows/ios.yml

@@ -6,40 +6,56 @@ on:
   pull_request:
     branches: [ main ]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   build:
-    name: Build and Test SDKHostApp scheme using any available iPhone simulator
-    runs-on: macos-latest
+    name: Build & test SDKHostApp
+    runs-on: macos-15
+    env:
+      SCHEME: SDKHostApp
+      PROJECT: IFTTT SDK.xcodeproj
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
-      - name: Build and Test
-        env:
-          scheme: ${{ 'SDKHostApp' }}
+        uses: actions/checkout@v4
+
+      - name: Select Xcode
+        uses: maxim-lobanov/setup-xcode@v1
+        with:
+          xcode-version: latest-stable
+
+      - name: Toolchain versions
+        run: |
+          xcodebuild -version
+          swift --version
+
+      - name: Pick iPhone simulator
+        id: sim
+        run: |
+          udid=$(xcrun simctl list devices available --json | python3 -c '
+          import json, sys
+          data = json.load(sys.stdin)
+          for runtime, devices in data["devices"].items():
+              if "iOS" not in runtime:
+                  continue
+              for dev in devices:
+                  if dev["name"].startswith("iPhone") and dev.get("isAvailable", False):
+                      print(dev["udid"])
+                      sys.exit(0)
+          sys.exit("No available iPhone simulator found")
+          ')
+          echo "destination=platform=iOS Simulator,id=$udid" >> "$GITHUB_OUTPUT"
+          echo "Using simulator $udid"
+
+      - name: Build & test
         run: |
-          # xcrun xctrace returns via stderr, not the expected stdout (see https://developer.apple.com/forums/thread/663959)
-
-          if [ $scheme = default ]; then scheme=$(cat default); fi
-          
-          # Determine file to build: .xcworkspace or .xcodeproj
-          if [ "`ls -A | grep -i \\.xcworkspace\$`" ]; then filetype_parameter="workspace" && file_to_build="`ls -A | grep -i \\.xcworkspace\$`"; else filetype_parameter="project" && file_to_build="`ls -A | grep -i \\.xcodeproj\$`"; fi
-          
-          # Clean up whitespace
-          file_to_build=`echo $file_to_build | awk '{$1=$1;print}'`
-          
-          # Find first available simulator
-          device_name=$(xcrun simctl list devices available | grep "iPhone" | head -n 1 | sed -E 's/^[[:space:]]*([^()]+)[[:space:]]*\(.*$/\1/' | awk '{$1=$1; print}')
-
-          if [ -z "$device_name" ]; then
-            echo "❌ Failed to find a valid iOS device."
-            exit 1
-          fi
-
-          echo "📱 Using device: $device_name"
-
-          # Build and run the tests
+          set -o pipefail
           xcodebuild test \
-            -scheme "$scheme" \
-            -"$filetype_parameter" "$file_to_build" \
-            -destination "platform=iOS Simulator,name=$device_name"
+            -project "$PROJECT" \
+            -scheme "$SCHEME" \
+            -destination "${{ steps.sim.outputs.destination }}" \
+            CODE_SIGNING_ALLOWED=NO \
+          | xcbeautify --renderer github-actions