package main

import (
  "crypto/md5"
  "fmt"
  "io"
  "io/ioutil"
  "log"
  "os"
  "path/filepath"
  "strings"
)

func md5Sum(fullpath string) []uint8 {
  hasher := md5.New()
  file, err := os.Open(fullpath)
  if err != nil {
    log.Fatal(err)
  }
  defer file.Close()
  if _, err := io.Copy(hasher, file); err != nil {
    // It's a directory
    return []uint8{0}
  }
  return hasher.Sum(nil)
}

func printDir(fullpath string, entry os.FileInfo, indent int) {
  fullpath = filepath.Join(fullpath, entry.Name())
  digest := md5Sum(fullpath)
  fmt.Printf("%s %x %s\n", strings.Repeat("-", indent), digest, entry.Name())
  if entry.IsDir() {
    printDirs(fullpath, indent+1)
  }
}

func printDirs(fullpath string, indent int) {
  dirs, _ := ioutil.ReadDir(fullpath)
  for _, entry := range dirs {
    printDir(fullpath, entry, indent)
  }
}

func main() {
  printDirs(".", 0)
}