From a73ef77ff05defe97fb9d03b6752e1da91b5dc4e Mon Sep 17 00:00:00 2001
From: Yegor Jbanov <yjbanov@google.com>
Date: Wed, 25 Sep 2019 09:02:23 -0700
Subject: [PATCH] Force exit felt tool on sigint, sigterm

---
 lib/web_ui/dev/felt.dart | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/lib/web_ui/dev/felt.dart b/lib/web_ui/dev/felt.dart
index 4b49a7506002b..ca9eafbb3d0a5 100644
--- a/lib/web_ui/dev/felt.dart
+++ b/lib/web_ui/dev/felt.dart
@@ -25,6 +25,8 @@ void main(List<String> args) async {
     io.exit(64); // Exit code 64 indicates a usage error.
   }
 
+  _listenToShutdownSignals();
+
   try {
     final bool result = await runner.run(args);
     if (result == false) {
@@ -41,3 +43,14 @@ void main(List<String> args) async {
   // Sometimes the Dart VM refuses to quit.
   io.exit(io.exitCode);
 }
+
+void _listenToShutdownSignals() {
+  io.ProcessSignal.sigint.watch().listen((_) {
+    print('Received SIGINT. Shutting down.');
+    io.exit(1);
+  });
+  io.ProcessSignal.sigterm.watch().listen((_) {
+    print('Received SIGTERM. Shutting down.');
+    io.exit(1);
+  });
+}