Simple static files web server written in golang

srv.go

package main

import "fmt"
import "net/http"
import "flag"
import "os"
import "path/filepath"

func main() {
    // --help
    flag.Usage = func() {
        _, filename := filepath.Split(os.Args[0])

        fmt.Printf("Simple webserver for serving static files from a file system\n")
        fmt.Printf("Usage: %s -p=port_number directory\n", filename)
        flag.PrintDefaults()
        fmt.Printf("If the directory is not provided, workdir is served\n")
    }

    // Run quiet?
    var quiet bool
    flag.BoolVar(&quiet, "q", false, "Don't print initial message. Default is to print it.")

    // Define port
    var port int
    flag.IntVar(&port, "p", 8000, "The port number to bind on. Default is 8000.")
    flag.Parse()

    // Define path
    var path string
    if (len(os.Args) > 1) { // serve provided path
        path = os.Args[1]
    } else { // serve the workdir
        dir, err := os.Getwd()
        if err != nil {
            fmt.Printf("Error can't get workdir to serve\n")
            os.Exit(2)
        }
        path = dir
    }

    // Run webserver
    if (!quiet) {
        fmt.Printf("Serving on port %d, workdir %s\n", port, path)
    }
    panic(http.ListenAndServe(fmt.Sprintf(":%d", port), http.FileServer(http.Dir(path))))
}