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File Content: `vacuum.js`

var assert = require('assert')
var dirname = require('path').dirname
var resolve = require('path').resolve
var isInside = require('path-is-inside')

var rimraf = require('rimraf')
var lstat = require('graceful-fs').lstat
var readdir = require('graceful-fs').readdir
var rmdir = require('graceful-fs').rmdir
var unlink = require('graceful-fs').unlink

module.exports = vacuum

function vacuum (leaf, options, cb) {
  assert(typeof leaf === 'string', 'must pass in path to remove')
  assert(typeof cb === 'function', 'must pass in callback')

  if (!options) options = {}
  assert(typeof options === 'object', 'options must be an object')

  var log = options.log ? options.log : function () {}

  leaf = leaf && resolve(leaf)
  var base = options.base && resolve(options.base)
  if (base && !isInside(leaf, base)) {
    return cb(new Error(leaf + ' is not a child of ' + base))
  }

  lstat(leaf, function (error, stat) {
    if (error) {
      if (error.code === 'ENOENT') return cb(null)

      log(error.stack)
      return cb(error)
    }

    if (!(stat && (stat.isDirectory() || stat.isSymbolicLink() || stat.isFile()))) {
      log(leaf, 'is not a directory, file, or link')
      return cb(new Error(leaf + ' is not a directory, file, or link'))
    }

    if (options.purge) {
      log('purging', leaf)
      rimraf(leaf, function (error) {
        if (error) return cb(error)

        next(dirname(leaf))
      })
    } else if (!stat.isDirectory()) {
      log('removing', leaf)
      unlink(leaf, function (error) {
        if (error) return cb(error)

        next(dirname(leaf))
      })
    } else {
      next(leaf)
    }
  })

  function next (branch) {
    branch = branch && resolve(branch)
    // either we've reached the base or we've reached the root
    if ((base && branch === base) || branch === dirname(branch)) {
      log('finished vacuuming up to', branch)
      return cb(null)
    }

    readdir(branch, function (error, files) {
      if (error) {
        if (error.code === 'ENOENT') return cb(null)

        log('unable to check directory', branch, 'due to', error.message)
        return cb(error)
      }

      if (files.length > 0) {
        log('quitting because other entries in', branch)
        return cb(null)
      }

      if (branch === process.env.HOME) {
        log('quitting because cannot remove home directory', branch)
        return cb(null)
      }

      log('removing', branch)
      lstat(branch, function (error, stat) {
        if (error) {
          if (error.code === 'ENOENT') return cb(null)

          log('unable to lstat', branch, 'due to', error.message)
          return cb(error)
        }

        var remove = stat.isDirectory() ? rmdir : unlink
        remove(branch, function (error) {
          if (error) {
            if (error.code === 'ENOENT') {
              log('quitting because lost the race to remove', branch)
              return cb(null)
            }
            if (error.code === 'ENOTEMPTY' || error.code === 'EEXIST') {
              log('quitting because new (racy) entries in', branch)
              return cb(null)
            }

            log('unable to remove', branch, 'due to', error.message)
            return cb(error)
          }

          next(dirname(branch))
        })
      })
    })
  }
}
Name	Size	Permission
.eslintrc	421 bytes	0644
.npmignore	13 bytes	0644
.travis.yml	215 bytes	0644
LICENSE	736 bytes	0644
README.md	1214 bytes	0644
package.json	1560 bytes	0644
vacuum.js	3302 bytes	0644
File Content: vacuum.js

File Content: `vacuum.js`
