From d4a59d807391ec49813ee3d2f32b18f3de11e9cc Mon Sep 17 00:00:00 2001
From: Adrian Moldovan <3854374+adimoldovan@users.noreply.github.com>
Date: Tue, 1 Sep 2026 15:19:03 +0300
Subject: [PATCH] Build/Test Tools: Copy local environment configuration
 synchronously.

Backport of [62871] to the 6.7 branch.

`start.js` copied `.env.example` asynchronously, then read `.env` on the next
line. On a fresh checkout the read can win, and the process then runs with no
configuration. Copy synchronously instead, guarded by `existsSync`, so `.env`
exists before `dotenv.config()` runs. Dropping the swallow-all callback also
lets a real copy error surface.
---
 tools/local-env/scripts/start.js | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/local-env/scripts/start.js b/tools/local-env/scripts/start.js
index ef7fb7b7d4360..c1344c901df0a 100644
--- a/tools/local-env/scripts/start.js
+++ b/tools/local-env/scripts/start.js
@@ -2,12 +2,12 @@ const dotenv       = require( 'dotenv' );
 const dotenvExpand = require( 'dotenv-expand' );
 const { execSync } = require( 'child_process' );
 const local_env_utils = require( './utils' );
-const { constants, copyFile } = require( 'node:fs' );
+const { copyFileSync, existsSync } = require( 'node:fs' );
 
 // Copy the default .env file when one is not present.
-copyFile( '.env.example', '.env', constants.COPYFILE_EXCL, (e) => {
-	console.log( '.env file already exists. .env.example was not copied.' );
-});
+if ( ! existsSync( '.env' ) ) {
+	copyFileSync( '.env.example', '.env' );
+}
 
 dotenvExpand.expand( dotenv.config() );