列出目录下的所有目录和文件

dirs_files.js

exports.dirs_files = function dirs_files(dir, callback) {
  var returned = false
    , result = { dirs: [], files: [] }
    , remaining = 1

  if ('function' === typeof dir) {
    callback = dir
    dir = '.'
  }
  if ('.' === dir[0]) {
    dir = path.resolve(dir)
  }
  function errorWrap (fn) {
    return function(err) {
      if (returned || err) {
        if (!returned) {
          returned = true
          return callback(err)
        }
        return
      }
      fn.apply(this, Array.prototype.slice.call(arguments, 1))
    }
  }
  function dirs (dir) {
    result.dirs.push(dir)
    fs.readdir(dir, errorWrap(function(files) {
      remaining += files.length
      files.forEach(function(file) {
        file = path.resolve(dir, file)
        fs.stat(file, errorWrap(function(stats) {
          if (stats.isFile()) {
            result.files.push(file)
            --remaining || done()
          } else if (stats.isDirectory()) {
            dirs(file)
          } else {
            --remaining || done()
          }
        }))
      })
      --remaining || done()
    }))
  }
  function done () {
    callback(null, result)
  }

  fs.stat(dir, function(err, stats) {
    if (err) {
      callback(err)
    } else if (!stats.isDirectory()) {
      callback(new Error('first parament is not a directory path'))
    } else {
      dirs(dir)
    }
  })
}