dev

cmd/gost/main.go

@@ -39,6 +39,7 @@ var (
 	apiAddr      string
 	metricsAddr  string
 	reload       time.Duration
+	showConfig   bool
 )
 
 func init() {
@@ -102,6 +103,7 @@ func init() {
 	flag.StringVar(&apiAddr, "api", "", "api service address")
 	flag.StringVar(&metricsAddr, "metrics", "", "metrics service address")
 	flag.DurationVar(&reload, "R", 0, "auto reload period (e.g. 30s, 1m)")
+	flag.BoolVar(&showConfig, "P", false, "print config only")
 	flag.Parse()
 
 	if printVersion {

cmd/gost/program.go

@@ -2,7 +2,9 @@ package main
 
 import (
 	"context"
+	"encoding/json"
 	"errors"
+	"fmt"
 	"net/http"
 	"os"
 	"os/signal"
@@ -23,6 +25,7 @@ import (
 	metrics "github.com/go-gost/x/metrics/service"
 	"github.com/go-gost/x/registry"
 	"github.com/judwhite/go-svc"
+	"gopkg.in/yaml.v3"
 )
 
 type program struct {
@@ -90,6 +93,17 @@ func (p *program) run(cfg *config.Config) error {
 			svc.Serve()
 		}()
 	}
+	if showConfig {
+		if outputFormat == "json" {
+			marshal, _ := json.Marshal(cfg)
+			fmt.Println(string(marshal))
+		} else {
+			marshal, _ := yaml.Marshal(cfg)
+			fmt.Println(string(marshal))
+		}
+		os.Exit(0)
+		return nil
+	}
 
 	if p.srvApi != nil {
 		p.srvApi.Close()