fix: propagate resolved port to build when default port is unavailable

When the default port (8081) is busy and the user accepts an alternative
port, the resolved port was only used to start Metro but not propagated
to args.port. This caused the iOS build (via RCT_METRO_PORT env var)
and Android build (via -PreactNativeDevServerPort and adb reverse) to
still use the original port, so the app would fail to connect to Metro.

Author: janicduplessis

packages/cli-platform-android/src/commands/runAndroid/index.ts

@@ -70,6 +70,10 @@ async function runAndroid(_argv: Array<string>, config: Config, args: Flags) {
         args.terminal,
       );
     }
+
+    if (newPort !== port) {
+      args.port = newPort;
+    }
   }
 
   if (config.reactNativeVersion !== 'unknown') {

packages/cli-platform-apple/src/commands/runCommand/createRun.ts

@@ -124,6 +124,10 @@ const createRun =
           args.terminal,
         );
       }
+
+      if (newPort !== port) {
+        args.port = newPort;
+      }
     }
 
     if (ctx.reactNativeVersion !== 'unknown') {