Initial Commit

Dockerfile

@@ -0,0 +1,15 @@
+FROM java:8
+
+ENV MIN_MEM=512M
+ENV MAX_MEM=512M
+ENV STOP="stop"
+
+COPY ./main /main
+COPY ./cmd /usr/local/bin/cmd
+COPY ./entry.sh /entry.sh
+
+EXPOSE 25565
+
+VOLUME [ "/server" ]
+
+ENTRYPOINT [ "/main" ]

docker-compose.yml

@@ -0,0 +1,15 @@
+version: '3.7'
+
+
+services:
+    proxy:
+      image: minecraft
+      restart: unless-stopped
+      environment: 
+        MAX_MEM: 2G
+      ports:
+        - 25565:25565
+      volumes: 
+        - /home/jimmy/misc/paper/:/server
+      stdin_open: true
+      tty: true

entry.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+echo $MIN_MEM $MAX_MEM
+/main $MIN_MEM $MAX_MEM

go.mod

@@ -0,0 +1,14 @@
+module minecrafttty
+
+go 1.15
+
+require (
+	github.com/creack/pty v1.1.11
+	github.com/gorilla/mux v1.8.0
+	github.com/gorilla/websocket v1.4.2
+	github.com/hpcloud/tail v1.0.0
+	github.com/kr/pty v1.1.8
+	github.com/sirupsen/logrus v1.6.0
+	gopkg.in/fsnotify.v1 v1.4.7 // indirect
+	gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 // indirect
+)

go.sum

@@ -0,0 +1,23 @@
+github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
+github.com/creack/pty v1.1.11 h1:07n33Z8lZxZ2qwegKbObQohDhXDQxiMMz1NOUGYlesw=
+github.com/creack/pty v1.1.11/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/gorilla/mux v1.8.0 h1:i40aqfkR1h2SlN9hojwV5ZA91wcXFOvkdNIeFDP5koI=
+github.com/gorilla/mux v1.8.0/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB71So=
+github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc=
+github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
+github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
+github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
+github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
+github.com/kr/pty v1.1.8 h1:AkaSdXYQOWeaO3neb8EM634ahkXXe3jYbVh/F9lq+GI=
+github.com/kr/pty v1.1.8/go.mod h1:O1sed60cT9XZ5uDucP5qwvh+TE3NnUj51EiZO/lmSfw=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/sirupsen/logrus v1.6.0 h1:UBcNElsrwanuuMsnGSlYmtmgbb23qDR5dG+6X6Oo89I=
+github.com/sirupsen/logrus v1.6.0/go.mod h1:7uNnSEd1DgxDLC74fIahvMZmmYsHGZGEOFrfsX/uA88=
+github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
+golang.org/x/sys v0.0.0-20190422165155-953cdadca894 h1:Cz4ceDQGXuKRnVBDTS23GTn/pU5OE2C0WrNTOYK1Uuc=
+golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
+gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=

src/cmd.go

@@ -0,0 +1,18 @@
+package main
+
+import (
+	"fmt"
+	"net"
+	"os"
+)
+
+func main() {
+	command := ""
+	// connect to this socket
+	conn, _ := net.Dial("tcp", "127.0.0.1:8081")
+	for _, s := range os.Args[1:] {
+		command += s + " "
+	}
+	// send to socket
+	fmt.Fprintf(conn, command+"\n")
+}

src/main.go

@@ -0,0 +1,89 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"net"
+	"os"
+	"os/exec"
+	"os/signal"
+	"strings"
+	"syscall"
+
+	"github.com/creack/pty"
+)
+
+func main() {
+	sigs := make(chan os.Signal, 1)
+	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
+
+	var minram, maxram, args, stop string
+	for _, e := range os.Environ() {
+		pair := strings.SplitN(e, "=", 2)
+		switch pair[0] {
+		case "MIN_MEM":
+			minram = "-Xms" + pair[1]
+		case "MAX_MEM":
+			maxram = "-Xmx" + pair[1]
+		case "ARGS":
+			args = pair[1]
+		case "STOP":
+			stop = pair[1]
+		}
+	}
+	var cmd *exec.Cmd
+	if args == "" {
+		cmd = exec.Command("java", minram, maxram, "-jar", "server.jar")
+	} else {
+		cmd = exec.Command("java", minram, maxram, args, "-jar", "server.jar")
+	}
+
+	cmd.Dir = "/server"
+	cmd.Stdout = os.Stdout
+	tty, err := pty.Start(cmd)
+	ln, _ := net.Listen("tcp", ":8081")
+
+	if err != nil {
+		panic(err)
+	}
+
+	defer func() {
+		cmd.Process.Kill()
+		cmd.Process.Wait()
+		tty.Close()
+		ln.Close()
+	}()
+
+	go func() {
+		sig := <-sigs
+		if sig == syscall.SIGTERM || sig == syscall.SIGINT {
+			fmt.Println("Stopping server")
+			tty.WriteString(stop + "\n\r")
+		}
+	}()
+
+	go func() {
+		//accept connections from clients
+		for {
+			conn, err := ln.Accept()
+			if err != nil {
+				continue
+			}
+			go handleClient(conn, tty)
+		}
+	}()
+
+	go func() {
+		io.Copy(tty, os.Stdin)
+	}()
+
+	cmd.Wait()
+	os.Exit(0)
+}
+
+func handleClient(conn net.Conn, tty *os.File) {
+	defer conn.Close()
+	cmd, _ := bufio.NewReader(conn).ReadString('\n')
+	tty.Write([]byte(cmd))
+}