slackhq.nebula/cmd/nebula/main.go

package main

import (
	"flag"
	"fmt"
	"os"

	"github.com/slackhq/nebula"
)

// A version string that can be set with
//
//     -ldflags "-X main.Build=SOMEVERSION"
//
// at compile-time.
var Build string

func main() {
	configPath := flag.String("config", "", "Path to either a file or directory to load configuration from")
	configTest := flag.Bool("test", false, "Test the config and print the end result. Non zero exit indicates a faulty config")
	printVersion := flag.Bool("version", false, "Print version")
	printUsage := flag.Bool("help", false, "Print command line usage")

	flag.Parse()

	if *printVersion {
		fmt.Printf("Build: %s\n", Build)
		os.Exit(0)
	}

	if *printUsage {
		flag.Usage()
		os.Exit(0)
	}

	if *configPath == "" {
		fmt.Println("-config flag must be set")
		flag.Usage()
		os.Exit(1)
	}

	nebula.Main(*configPath, *configTest, Build)
}