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src/main.go

@@ -21,6 +21,7 @@ func main() {
 	sigs := make(chan os.Signal, 1)
 	signal.Notify(sigs, syscall.SIGTERM)
 
+	//get environmental variables
 	var minram, maxram, args, stop, jar, regex string
 	for _, e := range os.Environ() {
 		pair := strings.SplitN(e, "=", 2)
@@ -40,16 +41,15 @@ func main() {
 		}
 	}
 
-
 	log.Printf("Ram: Min: %s Max: %s Stop: %s Jar: %s\n\r", minram, maxram, stop, jar)
 
-	
+	//check if there is a server jar
-
 	if _, err := os.Stat("/server/"+jar); os.IsNotExist(err) {
 		log.Println("\033[31mJar \"" + jar + "\" not found\033[0m")
 		os.Exit(1)
 	}
 	
+	//create command
 	var cmd *exec.Cmd
 	if args == "" {
 		cmd = exec.Command("java", minram, maxram, "-jar", jar)
@@ -58,16 +58,16 @@ func main() {
 		log.Printf("Args: %s \n\r", args)
 	}
 
-
+	//start server
 	cmd.Dir = "/server"
 	tty, err := pty.Start(cmd)
-	ln, _ := net.Listen("tcp", ":8081")
 	
 	if err != nil {
 		panic(err)
 	
 	}
 	
+	//cleanup
 	defer func() {
 		cmd.Process.Kill()
 		cmd.Process.Wait()
@@ -84,6 +84,8 @@ func main() {
 		}
 	}()
 
+	//accepts command from cmd.go and sends them to the server
+	ln, _ := net.Listen("tcp", ":8081")
 	go func() {
 		//accept connections from clients
 		for {
@@ -95,7 +97,7 @@ func main() {
 		}
 	}()
 
-	
+	//copy to standard out. If the the is a regex pattern, do output anything that matches
 	go func() {
 		filter := regexp.MustCompile(regex)
 		if(regex != "") {
@@ -106,20 +108,22 @@ func main() {
 					fmt.Println(text)
 				}
 			}
-		} else {
+		} else { //don't filter
 			io.Copy(os.Stdout, tty)
 		}
 	}()
 
+	//copy stdin
 	go func() {
 		io.Copy(tty, os.Stdin)
 	}()
 
-	cmd.Wait()
+	cmd.Wait() //wait for server to stop
 	tty.Write([]byte("\033[31mServer Stopped\033[0m"))
 	os.Exit(0)
 }
 
+//take commands from cmd.go and send it to sdtin of the server
 func handleClient(conn net.Conn, tty *os.File) {
 	defer conn.Close()
 	cmd, _ := bufio.NewReader(conn).ReadString('\n')