A simple template main Go file for use that uses kolide/kit's version package.

template.go

package main

import (
	"fmt"
	"os"
	"strings"

	"github.com/kolide/kit/version"
)

func runVersion(args []string) error {
	version.PrintFull()
	return nil
}

func usage() {
	fmt.Fprintf(os.Stderr, "USAGE\n")
	fmt.Fprintf(os.Stderr, "  %s <mode> --help\n", os.Args[0])
	fmt.Fprintf(os.Stderr, "\n")
	fmt.Fprintf(os.Stderr, "MODES\n")
	fmt.Fprintf(os.Stderr, "  version      Print full version information\n")
	fmt.Fprintf(os.Stderr, "\n")
	fmt.Fprintf(os.Stderr, "VERSION\n")
	fmt.Fprintf(os.Stderr, "  %s\n", version.Version().Version)
	fmt.Fprintf(os.Stderr, "\n")
}

func main() {
	if len(os.Args) < 2 {
		usage()
		os.Exit(1)
	}

	var run func([]string) error
	switch strings.ToLower(os.Args[1]) {
	case "version":
		run = runVersion
	default:
		usage()
		os.Exit(1)
	}

	if err := run(os.Args[2:]); err != nil {
		fmt.Fprintf(os.Stderr, "%v\n", err)
		os.Exit(1)
	}
}