From feaa47b5777886e57335a5ee20f3e736d7ba0151 Mon Sep 17 00:00:00 2001
From: Ajay Kongara <akongara@google.com>
Date: Fri, 4 Nov 2022 12:05:27 -0700
Subject: [PATCH] Send the port on which the server was opened back to the
 parent process, if this process was opened with an IPC channel.

---
 src/bin/firebase-functions.ts | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/bin/firebase-functions.ts b/src/bin/firebase-functions.ts
index 83d131282..3d75cbdce 100644
--- a/src/bin/firebase-functions.ts
+++ b/src/bin/firebase-functions.ts
@@ -78,4 +78,9 @@ if (process.env.PORT) {
 }
 
 console.log("Serving at port", port);
-server = app.listen(port);
+server = app.listen(port, () => {
+  const address = server.address();
+  if (process.send && typeof address === "object") {
+    process.send(address.port);
+  }
+});