go 1.18 debug.ReadBuildInfo() testing

main.go

package main

import (
	"flag"
	"fmt"
	"runtime/debug"
	"strings"
)

var (
	version     = "(development)"
	showVersion = flag.Bool("version", false, "show version")
)

// instead of go build --ldflags '-X "version=`git rev-parse HEAD`"'
func init() {
	info, ok := debug.ReadBuildInfo()
	if !ok {
		return
	}

	for _, s := range info.Settings {
		if strings.Contains(s.Key, "vcs.revision") {
			version = s.Value
			break
		}
	}
}

func main() {
	flag.Parse()
	if *showVersion {
		fmt.Printf("version: build %s\n", version)
	}

}