feat: fetch golang info from runtime

Dockerfile

@@ -35,8 +35,7 @@ FROM ${GOLANG_IMG} AS xproxy
 COPY . /XProxy
 WORKDIR /XProxy
 RUN go mod download -x
-RUN env CGO_ENABLED=0 go build -v -o xproxy -trimpath \
+RUN env CGO_ENABLED=0 go build -v -o xproxy -trimpath -ldflags "-s -w" ./cmd/ && mv ./xproxy /tmp/
-      -ldflags "-X 'main.goVersion=$(go version)' -s -w" ./cmd/ && mv ./xproxy /tmp/
 
 FROM alpine:3.16 AS asset
 WORKDIR /tmp/

cmd/xproxy.go

@@ -11,6 +11,7 @@ import (
     "io"
     "os"
     "path"
+    "runtime"
     "strconv"
 )
 
@@ -22,7 +23,6 @@ var v6TProxyPort = 7289
 var configDir = "/etc/xproxy"
 var assetFile = "/assets.tar.xz"
 
-var goVersion string
 var subProcess []*process.Process
 var assetDir, exposeDir, configFile string
 
@@ -53,8 +53,8 @@ func xproxyInit() {
     isDebug := flag.Bool("debug", os.Getenv("DEBUG") == "true", "Enable debug mode")
     configName := flag.String("config", xproxyConfig, "Config file name")
     flag.Parse()
-    if *isVersion {
+    if *isVersion { // show version info and exit
-        fmt.Printf("XProxy version %s (%s)\n", version, goVersion) // show version info and exit
+        fmt.Printf("XProxy version %s (%s %s/%s)\n", version, runtime.Version(), runtime.GOOS, runtime.GOARCH)
         os.Exit(0)
     }
 
@@ -96,7 +96,7 @@ func main() {
     }()
     xproxyInit()
     var settings config.Config
-    log.Infof("XProxy %s start (%s)", version, goVersion)
+    log.Infof("XProxy %s start (%s %s/%s)", version, runtime.Version(), runtime.GOOS, runtime.GOARCH)
     config.Load(configFile, &settings)
     loadNetwork(&settings)
     loadProxy(&settings)