fix(dev): drain stdin when not interactive

If stdin.on('data') isn't called, 'end' is never emitted. This works in
interactive mode (ie. stdin.isTTY) since readline drains stdin.

Author: thatguystone

packages/vite/src/node/utils.ts

@@ -1634,12 +1634,17 @@ const parentSigtermCallback: SigtermCallback = async (signal, exitCode) => {
   await Promise.all([...sigtermCallbacks].map((cb) => cb(signal, exitCode)))
 }
 
+const drain = () => {}
+
 export const setupSIGTERMListener = (
   callback: (signal?: 'SIGTERM', exitCode?: number) => Promise<void>,
 ): void => {
   if (sigtermCallbacks.size === 0) {
     process.once('SIGTERM', parentSigtermCallback)
     if (process.env.CI !== 'true') {
+      if (!process.stdin.isTTY) {
+        process.stdin.on("data", drain)
+      }
       process.stdin.on('end', parentSigtermCallback)
     }
   }
@@ -1653,6 +1658,7 @@ export const teardownSIGTERMListener = (
   if (sigtermCallbacks.size === 0) {
     process.off('SIGTERM', parentSigtermCallback)
     if (process.env.CI !== 'true') {
+      process.stdin.off("data", drain)
       process.stdin.off('end', parentSigtermCallback)
     }
   }