Files
McSrvWrapper/serverwrapper.go
2021-06-03 21:36:32 +02:00

134 lines
2.5 KiB
Go

package main
import (
"bufio"
// "fmt"
"io"
"log"
"time"
// "math"
"container/ring"
"os/exec"
"github.com/jroimartin/gocui"
"github.com/pelletier/go-toml"
)
var settings *toml.Tree
var stdout_ring *ring.Ring
var srv_stdin io.WriteCloser
var new_stdout bool = false
// reload settings (and maybe other things too)
func reload() {
settings, _ = toml.LoadFile("serverwrapper.toml")
}
//builds the cmd which is called to run the server
func build_cmd() (string, []string) {
return "ping", []string{"-t", "8.8.8.8"}
}
//run the server-thread
func server_run() {
//create the command
cmd_str, cmd_args := build_cmd()
cmd := exec.Command(cmd_str, cmd_args...)
//connect pipes
stdout, err := cmd.StdoutPipe()
cmd.Stderr = cmd.Stdout
srv_stdin, err = cmd.StdinPipe() //this one is global, because we write to it elsewhere
// run the process
err = cmd.Start()
if err != nil {
log.Panicln("Failed to call server command \"" + cmd.String() + "\"")
}
//read pipes and write them to the ring buffer
buf := bufio.NewScanner(stdout)
for {
if buf.Scan() {
stdout_ring.Value = buf.Text()
stdout_ring = stdout_ring.Next()
new_stdout = true
} else {
time.Sleep(300 * time.Millisecond)
}
}
}
func main() {
//initialize settings by "re"loading them from disk
reload()
//initialize the stdout/err ringbuffer
stdout_ring = ring.New(255)
//init the CUI
g, err := gocui.NewGui(gocui.OutputNormal)
if err != nil {
log.Panicln(err)
}
defer g.Close()
g.SetManagerFunc(layout)
if err := g.SetKeybinding("", gocui.KeyCtrlC, gocui.ModNone, quit); err != nil {
log.Panicln(err)
}
go server_run()
go func(g *gocui.Gui) {
for {
time.Sleep(50 * time.Millisecond)
if new_stdout {
new_stdout = false
g.Update(layout)
}
}
}(g)
//run the CUI main loop
if err := g.MainLoop(); err != nil && err != gocui.ErrQuit {
log.Panicln(err)
}
}
//create or update the CUI layout
func layout(g *gocui.Gui) error {
maxX, maxY := g.Size()
v, err := g.SetView("srv_log", 0, 0, maxX-1, int(float32(maxY) * 0.8))
if err != nil {
if err != gocui.ErrUnknownView {
return err
}
//dont put code in here you idiot
}
v.Clear()
vW, vH := v.Size()
r := stdout_ring.Prev()
for i := 0; i < vH; i++ {
v.SetCursor(0, vH - i - 1)
if r.Value != nil {
s := r.Value.(string)
for i := 0; i < len(s) && i < vW; i++ {
v.EditWrite([]rune(s)[i])
}
}
r = r.Prev()
}
return nil
}
func quit(g *gocui.Gui, v *gocui.View) error {
return gocui.ErrQuit
}