From 603d57ebc61970902ed9a275dd2e74a6c3eabe65 Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Thu, 11 Feb 2021 16:53:40 -0500
Subject: [PATCH] fix: user define on import.meta.env should apply during dev

---
 packages/vite/src/node/config.ts | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/packages/vite/src/node/config.ts b/packages/vite/src/node/config.ts
index 587a8b6d82d408..f8fa6873dc8bed 100644
--- a/packages/vite/src/node/config.ts
+++ b/packages/vite/src/node/config.ts
@@ -269,6 +269,15 @@ export async function resolveConfig(
 
   // load .env files
   const userEnv = loadEnv(mode, resolvedRoot)
+  // check if user defined any import.meta.env variables
+  if (config.define) {
+    const prefix = `import.meta.env.`
+    for (const key in config.define) {
+      if (key.startsWith(prefix)) {
+        userEnv[key.slice(prefix.length)] = config.define[key]
+      }
+    }
+  }
 
   // Note it is possible for user to have a custom mode, e.g. `staging` where
   // production-like behavior is expected. This is indicated by NODE_ENV=production