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config.go
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config.go
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package main
import (
"encoding/json"
"fmt"
"os"
"os/exec"
"path/filepath"
"sort"
"strings"
"sync"
"syscall"
)
type Service struct {
ID string `json:"id"`
Name string `json:"name"`
Running bool `json:"running"`
Building bool `json:"building"`
Flags []string `json:"-"`
Cmd *exec.Cmd `json:"-"`
Output *Output `json:"-"`
}
type Output struct {
Content *strings.Builder
Cond *sync.Cond
Data []byte
Finish chan struct{}
}
func (s *Output) Write(p []byte) (n int, err error) {
s.Data = p
s.Cond.L.Lock()
s.Cond.Broadcast()
s.Cond.L.Unlock()
return s.Content.Write(p)
}
var lock = &sync.Mutex{}
var servicesCond = sync.NewCond(&sync.Mutex{})
var services = map[string]*Service{
"anarchy": NewService("anarchy", "Nv7's Anarchy"),
//"bsharp": NewService("bsharp", "B Sharpener"),
"elemental_discord": NewService("elemental_discord", "Nv7's Elemental + Nv7 Bot"),
"eod": NewService("eod", "EoD Everywhere"),
//"joe": NewService("joe", "Average Joe"),
//"names": NewService("names", "NameBot"),
"nv7haven": NewService("nv7haven", "The nv7haven.com Backend"),
"single": NewService("single", "Nv7's Singleplayer"),
//"vdrive": NewService("vdrive", "VDrive"),
//"elemcraft": NewService("elemcraft", "Elemcraft", "serve"),
//"altruity": NewService("altruity", "Altruity", "serve", `--http=127.0.0.1:`+os.Getenv("ALTRUITY_PORT")),
"when3meet": NewService("when3meet", "When3meet", "serve", `--http=127.0.0.1:`+os.Getenv("WHEN3MEET_PORT")),
"commuter": NewService("commuter", "Commuter", "serve", `--http=127.0.0.1:`+os.Getenv("COMMUTER_PORT")),
"studier": NewService("studier", "Studier", "serve", `--http=127.0.0.1:`+os.Getenv("STUDIER_PORT")),
}
func NewService(id, name string, flags ...string) *Service {
return &Service{
ID: id,
Name: name,
Output: &Output{
Content: &strings.Builder{},
Cond: sync.NewCond(&sync.Mutex{}),
Finish: make(chan struct{}),
},
Flags: flags,
}
}
func marshalServices() []byte {
arr := make([]*Service, 0, len(services))
lock.Lock()
for _, s := range services {
arr = append(arr, s)
}
lock.Unlock()
sort.Slice(arr, func(i, j int) bool {
return arr[i].Name < arr[j].Name
})
v, err := json.Marshal(arr)
if err != nil {
panic(err)
}
return v
}
func PublishServices() {
servicesCond.L.Lock()
servicesCond.Broadcast()
servicesCond.L.Unlock()
}
func Build(s *Service) error {
s.Building = true
PublishServices()
defer func() {
s.Building = false
PublishServices()
}()
wd, err := os.Getwd()
if err != nil {
return err
}
// Pull
err = exec.Command("git", "pull").Run()
if err != nil {
return err
}
// Build
cmd := exec.Command("go", "build", "-o", filepath.Join(wd, "build", s.ID))
cmd.Dir = filepath.Join(wd, "run", s.ID)
cmd.Stderr = &strings.Builder{}
return cmd.Run()
}
func autoRestart(s *Service, wd string) {
err := s.Cmd.Wait()
if s.Running {
if printerr {
if err != nil {
fmt.Println(s.ID + " crashed with error: " + err.Error())
fmt.Println(s.Output.Content.String())
}
}
s.Output.Write([]byte("Server crashed with error: " + err.Error() + "\n"))
s.Cmd = exec.Command(filepath.Join(wd, "build", s.ID), s.Flags...)
s.Cmd.Stdout = s.Output
s.Cmd.Stderr = s.Output
s.Cmd.SysProcAttr = &syscall.SysProcAttr{
Setpgid: true,
}
err = s.Cmd.Start()
if err != nil {
s.Output.Write([]byte("Server couldn't start with error: " + err.Error() + "\n"))
s.Running = false
PublishServices()
} else {
go autoRestart(s, wd)
}
} else {
s.Output.Finish <- struct{}{}
}
}
func Run(s *Service) error {
wd, err := os.Getwd()
if err != nil {
return err
}
s.Cmd = exec.Command(filepath.Join(wd, "build", s.ID), s.Flags...)
s.Output.Content = &strings.Builder{}
s.Cmd.Stdout = s.Output
s.Cmd.Stderr = s.Output
s.Cmd.SysProcAttr = &syscall.SysProcAttr{
Setpgid: true,
}
err = s.Cmd.Start()
if err != nil {
return err
}
s.Running = true
PublishServices()
go autoRestart(s, wd)
return nil
}
func Stop(s *Service) error {
s.Running = false
err := s.Cmd.Process.Signal(os.Interrupt)
if err != nil {
return err
}
<-s.Output.Finish
s.Cmd = nil
PublishServices()
return nil
}