GoTomato/internal/metadata/version.go

package metadata

import (
	"os/exec"
	"runtime/debug"
	"strings"
)

var (
	GoTomatoVersion = "" // The GoTomato version
	ProtocolVersion = "" // The protocol version
)

func getLatestTag() string {
	output, _ := exec.Command("git", "describe", "--tags").Output()
	stripped_output := strings.TrimSpace(string(output))
	return strings.TrimLeft(stripped_output, "v")
}

// set version from runtime/debug.Main.Version
// use latest git tag as fallback
// allow GoTomatoVersion to be overwritten via ldflags
func init() {
	if GoTomatoVersion == "" {
		info, _ := debug.ReadBuildInfo()
		GoTomatoVersion = info.Main.Version
		if info.Main.Version == "(devel)" {
			GoTomatoVersion = getLatestTag()
		}
	}
	ProtocolVersion = strings.Split(GoTomatoVersion, ".")[0] // The protocol version
}