From 6bd5d2b731109fe85503e4d15f360affa8371f26 Mon Sep 17 00:00:00 2001
From: Rob Hogan <rob@rhogan.net>
Date: Fri, 17 May 2024 11:28:32 -0700
Subject: [PATCH] Add server_listening reporter event with actually-bound port
 and address

---
 packages/metro/src/index.flow.js        | 8 ++++++++
 packages/metro/src/lib/reporting.js     | 6 ++++++
 packages/metro/types/lib/reporting.d.ts | 6 ++++++
 3 files changed, 20 insertions(+)

diff --git a/packages/metro/src/index.flow.js b/packages/metro/src/index.flow.js
index c35cdf5eb1..4daea115c9 100644
--- a/packages/metro/src/index.flow.js
+++ b/packages/metro/src/index.flow.js
@@ -309,6 +309,14 @@ exports.runServer = async (
       });
 
       httpServer.listen(config.server.port, host, () => {
+        const {address, port, family} = httpServer.address();
+        config.reporter.update({
+          type: 'server_listening',
+          address,
+          port, // Assigned port if configured with port 0
+          family,
+        });
+
         if (onReady) {
           onReady(httpServer);
         }
diff --git a/packages/metro/src/lib/reporting.js b/packages/metro/src/lib/reporting.js
index 9971d41be1..7087762e41 100644
--- a/packages/metro/src/lib/reporting.js
+++ b/packages/metro/src/lib/reporting.js
@@ -132,6 +132,12 @@ export type ReportableEvent =
       type: 'resolver_warning',
       message: string,
     }
+  | {
+      type: 'server_listening',
+      port: number,
+      address: string,
+      family: string,
+    }
   | {
       type: 'transformer_load_started',
     }
diff --git a/packages/metro/types/lib/reporting.d.ts b/packages/metro/types/lib/reporting.d.ts
index b7d6e9f497..c47ae99a17 100644
--- a/packages/metro/types/lib/reporting.d.ts
+++ b/packages/metro/types/lib/reporting.d.ts
@@ -96,6 +96,12 @@ export type ReportableEvent =
         | 'debug';
       data: unknown[];
     }
+  | {
+      type: 'server_listening';
+      port: number;
+      address: string;
+      family: string;
+    }
   | {
       type: 'transformer_load_started';
     }