1 | var assert = require('assert')
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2 | var dirname = require('path').dirname
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3 | var resolve = require('path').resolve
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4 | var isInside = require('path-is-inside')
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5 |
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6 | var rimraf = require('rimraf')
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7 | var lstat = require('graceful-fs').lstat
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8 | var readdir = require('graceful-fs').readdir
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9 | var rmdir = require('graceful-fs').rmdir
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10 | var unlink = require('graceful-fs').unlink
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11 |
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12 | module.exports = vacuum
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13 |
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14 | function vacuum (leaf, options, cb) {
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15 | assert(typeof leaf === 'string', 'must pass in path to remove')
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16 | assert(typeof cb === 'function', 'must pass in callback')
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17 |
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18 | if (!options) options = {}
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19 | assert(typeof options === 'object', 'options must be an object')
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20 |
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21 | var log = options.log ? options.log : function () {}
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22 |
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23 | leaf = leaf && resolve(leaf)
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24 | var base = options.base && resolve(options.base)
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25 | if (base && !isInside(leaf, base)) {
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26 | return cb(new Error(leaf + ' is not a child of ' + base))
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27 | }
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28 |
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29 | lstat(leaf, function (error, stat) {
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30 | if (error) {
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31 | if (error.code === 'ENOENT') return cb(null)
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32 |
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33 | log(error.stack)
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34 | return cb(error)
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35 | }
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36 |
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37 | if (!(stat && (stat.isDirectory() || stat.isSymbolicLink() || stat.isFile()))) {
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38 | log(leaf, 'is not a directory, file, or link')
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39 | return cb(new Error(leaf + ' is not a directory, file, or link'))
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40 | }
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41 |
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42 | if (options.purge) {
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43 | log('purging', leaf)
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44 | rimraf(leaf, function (error) {
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45 | if (error) return cb(error)
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46 |
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47 | next(dirname(leaf))
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48 | })
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49 | } else if (!stat.isDirectory()) {
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50 | log('removing', leaf)
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51 | unlink(leaf, function (error) {
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52 | if (error) return cb(error)
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53 |
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54 | next(dirname(leaf))
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55 | })
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56 | } else {
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57 | next(leaf)
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58 | }
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59 | })
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60 |
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61 | function next (branch) {
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62 | branch = branch && resolve(branch)
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63 |
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64 | if ((base && branch === base) || branch === dirname(branch)) {
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65 | log('finished vacuuming up to', branch)
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66 | return cb(null)
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67 | }
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68 |
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69 | readdir(branch, function (error, files) {
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70 | if (error) {
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71 | if (error.code === 'ENOENT') return cb(null)
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72 |
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73 | log('unable to check directory', branch, 'due to', error.message)
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74 | return cb(error)
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75 | }
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76 |
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77 | if (files.length > 0) {
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78 | log('quitting because other entries in', branch)
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79 | return cb(null)
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80 | }
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81 |
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82 | if (branch === process.env.HOME) {
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83 | log('quitting because cannot remove home directory', branch)
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84 | return cb(null)
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85 | }
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86 |
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87 | log('removing', branch)
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88 | lstat(branch, function (error, stat) {
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89 | if (error) {
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90 | if (error.code === 'ENOENT') return cb(null)
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91 |
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92 | log('unable to lstat', branch, 'due to', error.message)
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93 | return cb(error)
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94 | }
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95 |
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96 | var remove = stat.isDirectory() ? rmdir : unlink
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97 | remove(branch, function (error) {
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98 | if (error) {
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99 | if (error.code === 'ENOENT') {
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100 | log('quitting because lost the race to remove', branch)
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101 | return cb(null)
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102 | }
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103 | if (error.code === 'ENOTEMPTY' || error.code === 'EEXIST') {
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104 | log('quitting because new (racy) entries in', branch)
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105 | return cb(null)
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106 | }
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107 |
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108 | log('unable to remove', branch, 'due to', error.message)
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109 | return cb(error)
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110 | }
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111 |
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112 | next(dirname(branch))
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113 | })
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114 | })
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115 | })
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116 | }
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117 | }
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