chore(dx): Change generate-public-api to find Xcode 16 (#6955)

Author: philprime

scripts/update-api.sh

@@ -6,9 +6,30 @@ XCODE_VERSION=$(xcodebuild -version | head -n 1 | awk '{print $2}')
 XCODE_MAJOR_VERSION=$(echo "$XCODE_VERSION" | cut -d. -f1)
 
 if [[ "$XCODE_MAJOR_VERSION" != "16" ]]; then
-    echo "Error: Xcode 16 is required for running the update-api.sh script, because Xcode 26 doesn't include the ObjC public API, but Xcode $XCODE_VERSION is currently selected."
-    echo "Please select Xcode 16 using 'sudo xcode-select' or 'xcodes select 16.x'"
-    exit 1
+    # Try to find an Xcode 16 installation
+    XCODE_16_PATH=$(find /Applications -maxdepth 1 -type d -name "Xcode-16*" 2>/dev/null | head -n 1)
+    
+    if [[ -n "$XCODE_16_PATH" ]]; then
+        echo "Xcode $XCODE_VERSION is currently selected, but found Xcode 16 at $XCODE_16_PATH"
+        echo "Using Xcode 16 for this script execution..."
+        export DEVELOPER_DIR="$XCODE_16_PATH/Contents/Developer"
+        
+        # Verify the Xcode 16 installation works
+        XCODE_16_VERSION=$(xcodebuild -version | head -n 1 | awk '{print $2}')
+        XCODE_16_MAJOR_VERSION=$(echo "$XCODE_16_VERSION" | cut -d. -f1)
+        
+        if [[ "$XCODE_16_MAJOR_VERSION" != "16" ]]; then
+            echo "Error: Found Xcode installation at $XCODE_16_PATH but it's version $XCODE_16_VERSION, not 16"
+            exit 1
+        fi
+        
+        echo "Successfully using Xcode 16 ($XCODE_16_VERSION)"
+    else
+        echo "Error: Xcode 16 is required for running the update-api.sh script, because Xcode 26 doesn't include the ObjC public API, but Xcode $XCODE_VERSION is currently selected."
+        echo "Please select Xcode 16 using 'sudo xcode-select' or 'xcodes select 16.x'"
+        echo "Alternatively, install Xcode 16 as '/Applications/Xcode-16*.app'"
+        exit 1
+    fi
 fi
 
 ./scripts/build-xcframework-slice.sh "iphoneos" "Sentry" "-Dynamic" "mh_dylib"