From 5805147af3a41af1af0f8525a09767a9ec183566 Mon Sep 17 00:00:00 2001
From: webbrain-one <295484252+webbrain-one@users.noreply.github.com>
Date: Wed, 12 Aug 2026 19:21:51 +0300
Subject: [PATCH] fix: restore signal-based HMR support

Reintroduce SIGUSR2 signal transmission when HMR is enabled, which
was broken by a previous change. Add an `hmr` option to distinguish
between signal-based updates and full process restarts. Ensure the
`rs` keyboard shortcut always triggers a complete restart.

Closes #56
---
 src/index.ts | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/index.ts b/src/index.ts
index d9ce82b..9cc8146 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -64,6 +64,13 @@ export class RunScriptWebpackPlugin implements WebpackPluginInstance {
 
   private afterEmit = (compilation: Compilation, cb: () => void): void => {
     if (this.worker && this.worker.connected && this.worker?.pid) {
+      const signal = getSignal(this.options.signal);
+      if (signal) {
+        process.kill(this.worker.pid, signal);
+        cb();
+        return;
+      }
+
       if (this.options.autoRestart) {
         this._restartServer();
         cb();