Fix serverStart for canceling build to stop server

build.gradle

@@ -130,25 +130,35 @@ def serverStart(String serverName) {
     Thread outputThread = proc.consumeProcessOutputStream(System.out)
     outputThread.setName("${serverName} - OutputThread")
 
-    Thread inputThread = new Thread(new Runnable() {
-        @Override
-        void run() {
-            Reader reader = System.in.newReader()
-            Writer writer = proc.getOutputStream().newWriter()
-            try {
-                while (true) {
-                    String s = reader.readLine()
-                    writer.write(s + "\n")
-                    writer.flush()
-                }
-            } catch (InterruptedIOException e) {
-
+    Thread inputThread = new Thread({
+        Reader reader = System.in.newReader()
+        Writer writer = proc.getOutputStream().newWriter()
+        try {
+            while (proc.alive) {
+                String s = reader.readLine()
+                writer.write(s + "\n")
+                writer.flush()
             }
+        } catch (IOException e) {
+            // Ignored
         }
     })
     inputThread.setName("${serverName} - InputThread")
     inputThread.start()
 
+    gradle.buildFinished { buildResult ->
+        if (!proc.alive) {
+            return
+        }
+        Writer writer = proc.getOutputStream().newWriter()
+        writer.write("stop\n")
+        writer.flush()
+
+        proc.closeStreams()
+        outputThread.interrupt()
+        inputThread.interrupt()
+    }
+
     while (proc.alive) {
         Thread.sleep(10)
     }