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app_cmd.go
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app_cmd.go
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package apps
import (
"errors"
"fmt"
teaconst "github.com/TeaOSLab/EdgeNode/internal/const"
executils "github.com/TeaOSLab/EdgeNode/internal/utils/exec"
"github.com/iwind/TeaGo/logs"
"github.com/iwind/TeaGo/maps"
"github.com/iwind/TeaGo/types"
"github.com/iwind/gosock/pkg/gosock"
"os"
"os/exec"
"path/filepath"
"runtime"
"strconv"
"strings"
"syscall"
"time"
)
// AppCmd App命令帮助
type AppCmd struct {
product string
version string
usages []string
options []*CommandHelpOption
appendStrings []string
directives []*Directive
sock *gosock.Sock
}
func NewAppCmd() *AppCmd {
return &AppCmd{
sock: gosock.NewTmpSock(teaconst.ProcessName),
}
}
type CommandHelpOption struct {
Code string
Description string
}
// Product 产品
func (this *AppCmd) Product(product string) *AppCmd {
this.product = product
return this
}
// Version 版本
func (this *AppCmd) Version(version string) *AppCmd {
this.version = version
return this
}
// Usage 使用方法
func (this *AppCmd) Usage(usage string) *AppCmd {
this.usages = append(this.usages, usage)
return this
}
// Option 选项
func (this *AppCmd) Option(code string, description string) *AppCmd {
this.options = append(this.options, &CommandHelpOption{
Code: code,
Description: description,
})
return this
}
// Append 附加内容
func (this *AppCmd) Append(appendString string) *AppCmd {
this.appendStrings = append(this.appendStrings, appendString)
return this
}
// Print 打印
func (this *AppCmd) Print() {
fmt.Println(this.product + " v" + this.version)
fmt.Println("Usage:")
for _, usage := range this.usages {
fmt.Println(" " + usage)
}
if len(this.options) > 0 {
fmt.Println("")
fmt.Println("Options:")
var spaces = 20
var max = 40
for _, option := range this.options {
l := len(option.Code)
if l < max && l > spaces {
spaces = l + 4
}
}
for _, option := range this.options {
if len(option.Code) > max {
fmt.Println("")
fmt.Println(" " + option.Code)
option.Code = ""
}
fmt.Printf(" %-"+strconv.Itoa(spaces)+"s%s\n", option.Code, ": "+option.Description)
}
}
if len(this.appendStrings) > 0 {
fmt.Println("")
for _, s := range this.appendStrings {
fmt.Println(s)
}
}
}
// On 添加指令
func (this *AppCmd) On(arg string, callback func()) {
this.directives = append(this.directives, &Directive{
Arg: arg,
Callback: callback,
})
}
// Run 运行
func (this *AppCmd) Run(main func()) {
// 获取参数
var args = os.Args[1:]
if len(args) > 0 {
var mainArg = args[0]
this.callDirective(mainArg + ":before")
switch mainArg {
case "-v", "version", "-version", "--version":
this.runVersion()
return
case "?", "help", "-help", "h", "-h":
this.runHelp()
return
case "start":
this.runStart()
return
case "stop":
this.runStop()
return
case "restart":
this.runRestart()
return
case "status":
this.runStatus()
return
}
// 查找指令
for _, directive := range this.directives {
if directive.Arg == mainArg {
directive.Callback()
return
}
}
fmt.Println("unknown command '" + mainArg + "'")
return
}
// 日志
var writer = new(LogWriter)
writer.Init()
logs.SetWriter(writer)
// 运行主函数
main()
}
// 版本号
func (this *AppCmd) runVersion() {
fmt.Println(this.product+" v"+this.version, "(build: "+runtime.Version(), runtime.GOOS, runtime.GOARCH, teaconst.Tag+")")
}
// 帮助
func (this *AppCmd) runHelp() {
this.Print()
}
// 启动
func (this *AppCmd) runStart() {
var pid = this.getPID()
if pid > 0 {
fmt.Println(this.product+" already started, pid:", pid)
return
}
_ = os.Setenv("EdgeBackground", "on")
var cmd = exec.Command(this.exe())
cmd.SysProcAttr = &syscall.SysProcAttr{
Foreground: false,
Setsid: true,
}
err := cmd.Start()
if err != nil {
fmt.Println(this.product+" start failed:", err.Error())
return
}
// create symbolic links
_ = this.createSymLinks()
fmt.Println(this.product+" started ok, pid:", cmd.Process.Pid)
}
// 停止
func (this *AppCmd) runStop() {
var pid = this.getPID()
if pid == 0 {
fmt.Println(this.product + " not started yet")
return
}
// 从systemd中停止
if runtime.GOOS == "linux" {
systemctl, _ := executils.LookPath("systemctl")
if len(systemctl) > 0 {
go func() {
// 有可能会长时间执行,这里不阻塞进程
_ = exec.Command(systemctl, "stop", teaconst.SystemdServiceName).Run()
}()
}
}
// 如果仍在运行,则发送停止指令
_, _ = this.sock.SendTimeout(&gosock.Command{Code: "stop"}, 1*time.Second)
fmt.Println(this.product+" stopped ok, pid:", types.String(pid))
}
// 重启
func (this *AppCmd) runRestart() {
this.runStop()
time.Sleep(1 * time.Second)
this.runStart()
}
// 状态
func (this *AppCmd) runStatus() {
var pid = this.getPID()
if pid == 0 {
fmt.Println(this.product + " not started yet")
return
}
fmt.Println(this.product + " is running, pid: " + types.String(pid))
}
// 获取当前的PID
func (this *AppCmd) getPID() int {
if !this.sock.IsListening() {
return 0
}
reply, err := this.sock.Send(&gosock.Command{Code: "pid"})
if err != nil {
return 0
}
return maps.NewMap(reply.Params).GetInt("pid")
}
// ParseOptions 分析参数中的选项
func (this *AppCmd) ParseOptions(args []string) map[string][]string {
var result = map[string][]string{}
for _, arg := range args {
var pieces = strings.SplitN(arg, "=", 2)
var key = strings.TrimLeft(pieces[0], "- ")
key = strings.TrimSpace(key)
var value = ""
if len(pieces) == 2 {
value = strings.TrimSpace(pieces[1])
}
result[key] = append(result[key], value)
}
return result
}
func (this *AppCmd) exe() string {
var exe, _ = os.Executable()
if len(exe) == 0 {
exe = os.Args[0]
}
return exe
}
// 创建软链接
func (this *AppCmd) createSymLinks() error {
if runtime.GOOS != "linux" {
return nil
}
var exe, _ = os.Executable()
if len(exe) == 0 {
return nil
}
var errorList = []string{}
// bin
{
var target = "/usr/bin/" + teaconst.ProcessName
old, _ := filepath.EvalSymlinks(target)
if old != exe {
_ = os.Remove(target)
err := os.Symlink(exe, target)
if err != nil {
errorList = append(errorList, err.Error())
}
}
}
// log
{
var realPath = filepath.Dir(filepath.Dir(exe)) + "/logs/run.log"
var target = "/var/log/" + teaconst.ProcessName + ".log"
old, _ := filepath.EvalSymlinks(target)
if old != realPath {
_ = os.Remove(target)
err := os.Symlink(realPath, target)
if err != nil {
errorList = append(errorList, err.Error())
}
}
}
if len(errorList) > 0 {
return errors.New(strings.Join(errorList, "\n"))
}
return nil
}
func (this *AppCmd) callDirective(code string) {
for _, directive := range this.directives {
if directive.Arg == code {
if directive.Callback != nil {
directive.Callback()
}
return
}
}
}