Add option to always list files

go/explore/explore.go

package main
import (
	"flag"
	"fmt"
	"os"
	"os/exec"
	"strings"
)
var options struct {
	listFiles bool
}
func init() {
	flag.BoolVar(&options.listFiles, "l", false, "Always list files")
}
func main() {
	flag.Parse()
	dir := "."
	if len(os.Args) > 1 {
		dir = os.Args[1]
	if flag.NArg() > 0 {
		dir = flag.Arg(0)
	}
	f, err := os.Open(dir)
		os.Exit(1)
	}
	if options.listFiles {
		cmd := exec.Command("ls", dir)
		cmd.Stdin = os.Stdin
		cmd.Stdout = os.Stdout
		cmd.Stderr = os.Stderr
		cmd.Run()
	}
	var cmd *exec.Cmd
	if fi.IsDir() {
		fis, err := f.Readdir(-1)
		if len(rs) == 0 {
			cmd = exec.Command("ls", dir)
		} else {
			if options.listFiles {
				fmt.Println()
			}
			fmt.Printf("'%s':\n", rs[0])
			cmd = exec.Command("head", "-n3", path.Join(dir, rs[0]))
		}
		cmd = exec.Command("head", "-n3", path.Join(dir, f.Name()))
	}
	if options.listFiles && cmd.Path == "ls" {
		os.Exit(0)
	}
	cmd.Stdin = os.Stdin
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr