package metadata

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

var ChronoTomatoVersion = "" // The GoTomato version

func stripVersionPrefix(version string) string {
	return strings.TrimLeft(version, "v")
}

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

// set GoTomatoVersion from runtime/debug.Main.Version
// use latest git tag as fallback
// can be overwritten via ldflags (e,g. by goreleaser)
func init() {
	if ChronoTomatoVersion == "" {
		info, _ := debug.ReadBuildInfo()
		if info.Main.Version != "(devel)" {
			ChronoTomatoVersion = stripVersionPrefix(info.Main.Version)
		} else {
			ChronoTomatoVersion = getLatestTag()
		}
	}
}