# all files / lib/ writer.js

14.94% Statements 36/241
0.62% Branches 1/162
0% Functions 0/29
16.98% Lines 36/212

    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
    226
    227
    228
    229
    230
    231
    232
    233
    234
    235
    236
    237
    238
    239
    240
    241
    242
    243
    244
    245
    246
    247
    248
    249
    250
    251
    252
    253
    254
    255
    256
    257
    258
    259
    260
    261
    262
    263
    264
    265
    266
    267
    268
    269
    270
    271
    272
    273
    274
    275
    276
    277
    278
    279
    280
    281
    282
    283
    284
    285
    286
    287
    288
    289
    290
    291
    292
    293
    294
    295
    296
    297
    298
    299
    300
    301
    302
    303
    304
    305
    306
    307
    308
    309
    310
    311
    312
    313
    314
    315
    316
    317
    318
    319
    320
    321
    322
    323
    324
    325
    326
    327
    328
    329
    330
    331
    332
    333
    334
    335
    336
    337
    338
    339
    340
    341
    342
    343
    344
    345
    346
    347
    348
    349
    350
    351
    352
    353
    354
    355
    356
    357
    358
    359
    360
    361
    362
    363
    364
    365
    366
    367
    368
    369
    370
    371
    372
    373
    374
    375
    376
    377
    378
    379
    380
    381
    382
    383
    384
    385
    386
    387
    388
    389
    390
    3911×

    1×
    1×
    1×
    1×
    1×
    1×
    1×
    1×

    1×

    1×
    1×

    1×
    1×
    1×
    1×

    1×

    1×

    1×

    1×

    1×

    1×

    1×

    1×

    1×

    1×

    1×

    1×

    1×

    1×

    1×

    1×

    1×

    1×

    1×

    1×

     module.exports = Writer

    var fs = require('graceful-fs')
    var inherits = require('inherits')
    var rimraf = require('rimraf')
    var mkdir = require('mkdirp')
    var path = require('path')
    var umask = process.platform === 'win32' ? 0 : process.umask()
    var getType = require('./get-type.js')
    var Abstract = require('./abstract.js')

    // Must do this *before* loading the child classes
    inherits(Writer, Abstract)

    Writer.dirmode = parseInt('0777', 8) & (~umask)
    Writer.filemode = parseInt('0666', 8) & (~umask)

    var DirWriter = require('./dir-writer.js')
    var LinkWriter = require('./link-writer.js')
    var FileWriter = require('./file-writer.js')
    var ProxyWriter = require('./proxy-writer.js')

    // props is the desired state.  current is optionally the current stat,
    // provided here so that subclasses can avoid statting the target
    // more than necessary.
    function Writer (props, current) {
      var self = this

      if (typeof props === 'string') {
        props = { path: props }
      }

      if (!props.path) self.error('Must provide a path', null, true)

      // polymorphism.
      // call fstream.Writer(dir) to get a DirWriter object, etc.
      var type = getType(props)
      var ClassType = Writer

      switch (type) {
        case 'Directory':
          ClassType = DirWriter
          break
        case 'File':
          ClassType = FileWriter
          break
        case 'Link':
        case 'SymbolicLink':
          ClassType = LinkWriter
          break
        case null:
        default:
          // Don't know yet what type to create, so we wrap in a proxy.
          ClassType = ProxyWriter
          break
      }

      if (!(self instanceof ClassType)) return new ClassType(props)

      // now get down to business.

      Abstract.call(self)

      // props is what we want to set.
      // set some convenience properties as well.
      self.type = props.type
      self.props = props
      self.depth = props.depth || 0
      self.clobber = props.clobber === false ? props.clobber : true
      self.parent = props.parent || null
      self.root = props.root || (props.parent && props.parent.root) || self

      self._path = self.path = path.resolve(props.path)
      if (process.platform === 'win32') {
        self.path = self._path = self.path.replace(/\?/g, '_')
        if (self._path.length >= 260) {
          self._swallowErrors = true
          self._path = '\\\\?\\' + self.path.replace(/\//g, '\\')
        }
      }
      self.basename = path.basename(props.path)
      self.dirname = path.dirname(props.path)
      self.linkpath = props.linkpath || null

      props.parent = props.root = null

      // console.error("\n\n\n%s setting size to", props.path, props.size)
      self.size = props.size

      if (typeof props.mode === 'string') {
        props.mode = parseInt(props.mode, 8)
      }

      self.readable = false
      self.writable = true

      // buffer until ready, or while handling another entry
      self._buffer = []
      self.ready = false

      self.filter = typeof props.filter === 'function' ? props.filter : null

      // start the ball rolling.
      // this checks what's there already, and then calls
      // self._create() to call the impl-specific creation stuff.
      self._stat(current)
    }

    // Calling this means that it's something we can't create.
    // Just assert that it's already there, otherwise raise a warning.
    Writer.prototype._create = function () {
      var self = this
      fs[self.props.follow ? 'stat' : 'lstat'](self._path, function (er) {
        if (er) {
          return self.warn('Cannot create ' + self._path + '\n' +
            'Unsupported type: ' + self.type, 'ENOTSUP')
        }
        self._finish()
      })
    }

    Writer.prototype._stat = function (current) {
      var self = this
      var props = self.props
      var stat = props.follow ? 'stat' : 'lstat'
      var who = self._proxy || self

      if (current) statCb(null, current)
      else fs[stat](self._path, statCb)

      function statCb (er, current) {
        if (self.filter && !self.filter.call(who, who, current)) {
          self._aborted = true
          self.emit('end')
          self.emit('close')
          return
        }

        // if it's not there, great.  We'll just create it.
        // if it is there, then we'll need to change whatever differs
        if (er || !current) {
          return create(self)
        }

        self._old = current
        var currentType = getType(current)

        // if it's a type change, then we need to clobber or error.
        // if it's not a type change, then let the impl take care of it.
        if (currentType !== self.type) {
          return rimraf(self._path, function (er) {
            if (er) return self.error(er)
            self._old = null
            create(self)
          })
        }

        // otherwise, just handle in the app-specific way
        // this creates a fs.WriteStream, or mkdir's, or whatever
        create(self)
      }
    }

    function create (self) {
      // console.error("W create", self._path, Writer.dirmode)

      // XXX Need to clobber non-dirs that are in the way,
      // unless { clobber: false } in the props.
      mkdir(path.dirname(self._path), Writer.dirmode, function (er, made) {
        // console.error("W created", path.dirname(self._path), er)
        if (er) return self.error(er)

        // later on, we have to set the mode and owner for these
        self._madeDir = made
        return self._create()
      })
    }

    function endChmod (self, want, current, path, cb) {
      var wantMode = want.mode
      var chmod = want.follow || self.type !== 'SymbolicLink'
        ? 'chmod' : 'lchmod'

      if (!fs[chmod]) return cb()
      if (typeof wantMode !== 'number') return cb()

      var curMode = current.mode & parseInt('0777', 8)
      wantMode = wantMode & parseInt('0777', 8)
      if (wantMode === curMode) return cb()

      fs[chmod](path, wantMode, cb)
    }

    function endChown (self, want, current, path, cb) {
      // Don't even try it unless root.  Too easy to EPERM.
      if (process.platform === 'win32') return cb()
      if (!process.getuid || process.getuid() !== 0) return cb()
      if (typeof want.uid !== 'number' &&
        typeof want.gid !== 'number') return cb()

      if (current.uid === want.uid &&
        current.gid === want.gid) return cb()

      var chown = (self.props.follow || self.type !== 'SymbolicLink')
        ? 'chown' : 'lchown'
      if (!fs[chown]) return cb()

      if (typeof want.uid !== 'number') want.uid = current.uid
      if (typeof want.gid !== 'number') want.gid = current.gid

      fs[chown](path, want.uid, want.gid, cb)
    }

    function endUtimes (self, want, current, path, cb) {
      if (!fs.utimes || process.platform === 'win32') return cb()

      var utimes = (want.follow || self.type !== 'SymbolicLink')
        ? 'utimes' : 'lutimes'

      if (utimes === 'lutimes' && !fs[utimes]) {
        utimes = 'utimes'
      }

      if (!fs[utimes]) return cb()

      var curA = current.atime
      var curM = current.mtime
      var meA = want.atime
      var meM = want.mtime

      if (meA === undefined) meA = curA
      if (meM === undefined) meM = curM

      if (!isDate(meA)) meA = new Date(meA)
      if (!isDate(meM)) meA = new Date(meM)

      if (meA.getTime() === curA.getTime() &&
        meM.getTime() === curM.getTime()) return cb()

      fs[utimes](path, meA, meM, cb)
    }

    // XXX This function is beastly.  Break it up!
    Writer.prototype._finish = function () {
      var self = this

      if (self._finishing) return
      self._finishing = true

      // console.error(" W Finish", self._path, self.size)

      // set up all the things.
      // At this point, we're already done writing whatever we've gotta write,
      // adding files to the dir, etc.
      var todo = 0
      var errState = null
      var done = false

      if (self._old) {
        // the times will almost *certainly* have changed.
        // adds the utimes syscall, but remove another stat.
        self._old.atime = new Date(0)
        self._old.mtime = new Date(0)
        // console.error(" W Finish Stale Stat", self._path, self.size)
        setProps(self._old)
      } else {
        var stat = self.props.follow ? 'stat' : 'lstat'
        // console.error(" W Finish Stating", self._path, self.size)
        fs[stat](self._path, function (er, current) {
          // console.error(" W Finish Stated", self._path, self.size, current)
          if (er) {
            // if we're in the process of writing out a
            // directory, it's very possible that the thing we're linking to
            // doesn't exist yet (especially if it was intended as a symlink),
            // so swallow ENOENT errors here and just soldier on.
            if (er.code === 'ENOENT' &&
              (self.type === 'Link' || self.type === 'SymbolicLink') &&
              process.platform === 'win32') {
              self.ready = true
              self.emit('ready')
              self.emit('end')
              self.emit('close')
              self.end = self._finish = function () {}
              return
            } else return self.error(er)
          }
          setProps(self._old = current)
        })
      }

      return

      function setProps (current) {
        todo += 3
        endChmod(self, self.props, current, self._path, next('chmod'))
        endChown(self, self.props, current, self._path, next('chown'))
        endUtimes(self, self.props, current, self._path, next('utimes'))
      }

      function next (what) {
        return function (er) {
          // console.error("   W Finish", what, todo)
          if (errState) return
          if (er) {
            er.fstream_finish_call = what
            return self.error(errState = er)
          }
          if (--todo > 0) return
          if (done) return
          done = true

          // we may still need to set the mode/etc. on some parent dirs
          // that were created previously.  delay end/close until then.
          if (!self._madeDir) return end()
          else endMadeDir(self, self._path, end)

          function end (er) {
            if (er) {
              er.fstream_finish_call = 'setupMadeDir'
              return self.error(er)
            }
            // all the props have been set, so we're completely done.
            self.emit('end')
            self.emit('close')
          }
        }
      }
    }

    function endMadeDir (self, p, cb) {
      var made = self._madeDir
      // everything *between* made and path.dirname(self._path)
      // needs to be set up.  Note that this may just be one dir.
      var d = path.dirname(p)

      endMadeDir_(self, d, function (er) {
        if (er) return cb(er)
        if (d === made) {
          return cb()
        }
        endMadeDir(self, d, cb)
      })
    }

    function endMadeDir_ (self, p, cb) {
      var dirProps = {}
      Object.keys(self.props).forEach(function (k) {
        dirProps[k] = self.props[k]

        // only make non-readable dirs if explicitly requested.
        if (k === 'mode' && self.type !== 'Directory') {
          dirProps[k] = dirProps[k] | parseInt('0111', 8)
        }
      })

      var todo = 3
      var errState = null
      fs.stat(p, function (er, current) {
        if (er) return cb(errState = er)
        endChmod(self, dirProps, current, p, next)
        endChown(self, dirProps, current, p, next)
        endUtimes(self, dirProps, current, p, next)
      })

      function next (er) {
        if (errState) return
        if (er) return cb(errState = er)
        if (--todo === 0) return cb()
      }
    }

    Writer.prototype.pipe = function () {
      this.error("Can't pipe from writable stream")
    }

    Writer.prototype.add = function () {
      this.error("Can't add to non-Directory type")
    }

    Writer.prototype.write = function () {
      return true
    }

    function objectToString (d) {
      return Object.prototype.toString.call(d)
    }

    function isDate (d) {
      return typeof d === 'object' && objectToString(d) === '[object Date]'
    }