A simple file list program

ls.go

package main

import (
        "path/filepath"
        "fmt"
        "log"
        "os"
)

type visitor struct {
        root  string
        files []string
        dirs  int
}

func (v *visitor) run() {
        errors := make(chan os.Error)
        defer close(errors)

        go func() {
                for err := range errors {
                        log.Printf("walk: %s", err)
                }
        }()

        filepath.Walk(v.root, v, errors)
}

func (v *visitor) VisitDir(path string, f *os.FileInfo) bool {
        v.dirs += 1
        return true
}

func (v *visitor) VisitFile(path string, f *os.FileInfo) {
        v.files = append(v.files, path)
}

func main() {
        v := visitor{root: "."}

        if len(os.Args) > 1 {
                v.root = os.Args[1]
        }

        v.run()
        for _, path := range v.files {
                fmt.Println(path)
        }
}