Add Debugger for remote JVM

buildSrc/src/steamwar.devserver.gradle

@@ -86,6 +86,7 @@ class DevServer extends DefaultTask {
 
             if (worldName == null) worldName = properties.get("worldName")
             host = properties.get("host")
+            debugPort = new Random().nextInt(5001, 10000)
 
             if (host == null) {
                 throw new GradleException("Please supply the 'host' in a 'steamwar.properties' files either in this project dir or any parent project!")
@@ -94,6 +95,7 @@ class DevServer extends DefaultTask {
         doLast {
             setupTemplate(template)
             uploadDependencies()
+            startDebugPort()
             startDevServer()
         }
         finalizedBy(new Finalizer())
@@ -105,6 +107,9 @@ class DevServer extends DefaultTask {
     @Internal
     String host
 
+    @Internal
+    int debugPort
+
     @Internal
     Boolean running = true
 
@@ -213,6 +218,17 @@ class DevServer extends DefaultTask {
         }
     }
 
+    void startDebugPort() {
+        def process = new ProcessBuilder("ssh", host, "-L", "5005:localhost:$debugPort").start()
+        def processOutput = new BufferedReader(new InputStreamReader(process.inputStream))
+        new Thread({
+            while (running) {
+            }
+            processOutput.close()
+            process.errorStream.close()
+        }).start()
+    }
+
     void startDevServer() {
         def devPy = new StringBuilder().append("dev.py")
         if (port != null) devPy.append(" --port $port")
@@ -225,6 +241,7 @@ class DevServer extends DefaultTask {
             devPy.append(" -D${dParam.key}=${dParam.value}")
         }
         devPy.append(" $template")
+        devPy.append(" -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=*:$debugPort")
         if (jvmArgs != null) devPy.append(" $jvmArgs")
         println("Starting $template with command ${devPy.toString()}")