File: copy.js

package info (click to toggle)
node-copy-concurrently 1.0.5-7
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, sid
  • size: 144 kB
  • sloc: javascript: 652; makefile: 2
file content (225 lines) | stat: -rw-r--r-- 7,364 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
'use strict'
module.exports = copy
module.exports.item = copyItem
module.exports.recurse = recurseDir
module.exports.symlink = copySymlink
module.exports.file = copyFile

var nodeFs = require('fs')
var path = require('path')
var validate = require('aproba')
var stockWriteStreamAtomic = require('fs-write-stream-atomic')
var mkdirp = require('mkdirp')
var rimraf = require('rimraf')
var isWindows = require('./is-windows')
var RunQueue = require('run-queue')
var extend = Object.assign || require('util')._extend

function promisify (Promise, fn) {
  return function () {
    var args = [].slice.call(arguments)
    return new Promise(function (resolve, reject) {
      return fn.apply(null, args.concat(function (err, value) {
        if (err) {
          reject(err)
        } else {
          resolve(value)
        }
      }))
    })
  }
}

function copy (from, to, opts) {
  validate('SSO|SS', arguments)
  opts = extend({}, opts || {})

  var Promise = opts.Promise || global.Promise
  var fs = opts.fs || nodeFs

  if (opts.isWindows == null) opts.isWindows = isWindows
  if (!opts.Promise) opts.Promise = Promise
  if (!opts.fs) opts.fs = fs
  if (!opts.recurseWith) opts.recurseWith = copyItem
  if (!opts.lstat) opts.lstat = promisify(opts.Promise, fs.lstat)
  if (!opts.stat) opts.stat = promisify(opts.Promise, fs.stat)
  if (!opts.chown) opts.chown = promisify(opts.Promise, fs.chown)
  if (!opts.readdir) opts.readdir = promisify(opts.Promise, fs.readdir)
  if (!opts.readlink) opts.readlink = promisify(opts.Promise, fs.readlink)
  if (!opts.symlink) opts.symlink = promisify(opts.Promise, fs.symlink)
  if (!opts.chmod) opts.chmod = promisify(opts.Promise, fs.chmod)

  opts.top = from
  opts.mkdirpAsync = mkdirp
  var rimrafAsync = promisify(opts.Promise, rimraf)

  var queue = new RunQueue({
    maxConcurrency: opts.maxConcurrency,
    Promise: Promise
  })
  opts.queue = queue

  queue.add(0, copyItem, [from, to, opts])

  return queue.run().catch(function (err) {
    // if the target already exists don't clobber it
    if (err.code === 'EEXIST' || err.code === 'EPERM') {
      return passThroughError()
    } else {
      return remove(to).then(passThroughError, passThroughError)
    }
    function passThroughError () {
      return Promise.reject(err)
    }
  })

  function remove (target) {
    var opts = {
      unlink: fs.unlink,
      chmod: fs.chmod,
      stat: fs.stat,
      lstat: fs.lstat,
      rmdir: fs.rmdir,
      readdir: fs.readdir,
      glob: false
    }
    return rimrafAsync(target, opts)
  }
}

function copyItem (from, to, opts) {
  validate('SSO', [from, to, opts])
  var fs = opts.fs || nodeFs
  var Promise = opts.Promise || global.Promise
  var lstat = opts.lstat || promisify(Promise, fs.lstat)

  return lstat(to).then(function () {
    return Promise.reject(eexists(from, to))
  }, function (err) {
    if (err && err.code !== 'ENOENT') return Promise.reject(err)
    return lstat(from)
  }).then(function (fromStat) {
    var cmdOpts = extend(extend({}, opts), fromStat)
    if (fromStat.isDirectory()) {
      return recurseDir(from, to, cmdOpts)
    } else if (fromStat.isSymbolicLink()) {
      opts.queue.add(1, copySymlink, [from, to, cmdOpts])
    } else if (fromStat.isFile()) {
      return copyFile(from, to, cmdOpts)
    } else if (fromStat.isBlockDevice()) {
      return Promise.reject(eunsupported(from + " is a block device, and we don't know how to copy those."))
    } else if (fromStat.isCharacterDevice()) {
      return Promise.reject(eunsupported(from + " is a character device, and we don't know how to copy those."))
    } else if (fromStat.isFIFO()) {
      return Promise.reject(eunsupported(from + " is a FIFO, and we don't know how to copy those."))
    } else if (fromStat.isSocket()) {
      return Promise.reject(eunsupported(from + " is a socket, and we don't know how to copy those."))
    } else {
      return Promise.reject(eunsupported("We can't tell what " + from + " is and so we can't copy it."))
    }
  })
}

function recurseDir (from, to, opts) {
  validate('SSO', [from, to, opts])
  var recurseWith = opts.recurseWith || copyItem
  var fs = opts.fs || nodeFs
  var chown = opts.chown || promisify(Promise, fs.chown)
  var readdir = opts.readdir || promisify(Promise, fs.readdir)
  var mkdirpAsync = opts.mkdirpAsync || mkdirp

  return mkdirpAsync(to, {fs: fs, mode: opts.mode}).then(function () {
    var getuid = opts.getuid || process.getuid
    if (getuid && opts.uid != null && getuid() === 0) {
      return chown(to, opts.uid, opts.gid)
    }
  }).then(function () {
    return readdir(from)
  }).then(function (files) {
    files.forEach(function (file) {
      opts.queue.add(0, recurseWith, [path.join(from, file), path.join(to, file), opts])
    })
  })
}

function copySymlink (from, to, opts) {
  validate('SSO', [from, to, opts])
  var fs = opts.fs || nodeFs
  var readlink = opts.readlink || promisify(Promise, fs.readlink)
  var stat = opts.stat || promisify(Promise, fs.symlink)
  var symlink = opts.symlink || promisify(Promise, fs.symlink)
  var Promise = opts.Promise || global.Promise

  return readlink(from).then(function (fromDest) {
    var absoluteDest = path.resolve(path.dirname(from), fromDest)
    // Treat absolute paths that are inside the tree we're
    // copying as relative. This necessary to properly support junctions
    // on windows (which are always absolute) but is also DWIM with symlinks.
    var relativeDest = path.relative(opts.top, absoluteDest)
    var linkFrom = relativeDest.substr(0, 2) === '..' ? fromDest : path.relative(path.dirname(from), absoluteDest)
    if (opts.isWindows) {
      return stat(absoluteDest).catch(function () { return null }).then(function (destStat) {
        var isDir = destStat && destStat.isDirectory()
        var type = isDir ? 'dir' : 'file'
        return symlink(linkFrom, to, type).catch(function (err) {
          if (type === 'dir') {
            return symlink(linkFrom, to, 'junction')
          } else {
            return Promise.reject(err)
          }
        })
      })
    } else {
      return symlink(linkFrom, to)
    }
  })
}

function copyFile (from, to, opts) {
  validate('SSO', [from, to, opts])
  var fs = opts.fs || nodeFs
  var writeStreamAtomic = opts.writeStreamAtomic || stockWriteStreamAtomic
  var Promise = opts.Promise || global.Promise
  var chmod = opts.chmod || promisify(Promise, fs.chmod)

  var writeOpts = {}
  var getuid = opts.getuid || process.getuid
  if (getuid && opts.uid != null && getuid() === 0) {
    writeOpts.chown = {
      uid: opts.uid,
      gid: opts.gid
    }
  }

  return new Promise(function (resolve, reject) {
    var errored = false
    function onError (err) {
      errored = true
      reject(err)
    }
    fs.createReadStream(from)
      .once('error', onError)
      .pipe(writeStreamAtomic(to, writeOpts))
      .once('error', onError)
      .once('close', function () {
        if (errored) return
        if (opts.mode != null) {
          resolve(chmod(to, opts.mode))
        } else {
          resolve()
        }
      })
  })
}

function eexists (from, to) {
  var err = new Error('Could not move ' + from + ' to ' + to + ': destination already exists.')
  err.code = 'EEXIST'
  return err
}

function eunsupported (msg) {
  var err = new Error(msg)
  err.code = 'EUNSUPPORTED'
  return err
}