initial commit

node_modules/fstream/lib/link-writer.js

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+module.exports = LinkWriter
+
+var fs = require('graceful-fs')
+var Writer = require('./writer.js')
+var inherits = require('inherits')
+var path = require('path')
+var rimraf = require('rimraf')
+
+inherits(LinkWriter, Writer)
+
+function LinkWriter (props) {
+  var self = this
+  if (!(self instanceof LinkWriter)) {
+    throw new Error('LinkWriter must be called as constructor.')
+  }
+
+  // should already be established as a Link type
+  if (!((props.type === 'Link' && props.Link) ||
+    (props.type === 'SymbolicLink' && props.SymbolicLink))) {
+    throw new Error('Non-link type ' + props.type)
+  }
+
+  if (props.linkpath === '') props.linkpath = '.'
+  if (!props.linkpath) {
+    self.error('Need linkpath property to create ' + props.type)
+  }
+
+  Writer.call(this, props)
+}
+
+LinkWriter.prototype._create = function () {
+  // console.error(" LW _create")
+  var self = this
+  var hard = self.type === 'Link' || process.platform === 'win32'
+  var link = hard ? 'link' : 'symlink'
+  var lp = hard ? path.resolve(self.dirname, self.linkpath) : self.linkpath
+
+  // can only change the link path by clobbering
+  // For hard links, let's just assume that's always the case, since
+  // there's no good way to read them if we don't already know.
+  if (hard) return clobber(self, lp, link)
+
+  fs.readlink(self._path, function (er, p) {
+    // only skip creation if it's exactly the same link
+    if (p && p === lp) return finish(self)
+    clobber(self, lp, link)
+  })
+}
+
+function clobber (self, lp, link) {
+  rimraf(self._path, function (er) {
+    if (er) return self.error(er)
+    create(self, lp, link)
+  })
+}
+
+function create (self, lp, link) {
+  fs[link](lp, self._path, function (er) {
+    // if this is a hard link, and 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 in.
+    // Additionally, an EPERM or EACCES can happen on win32 if it's trying
+    // to make a link to a directory.  Again, just skip it.
+    // A better solution would be to have fs.symlink be supported on
+    // windows in some nice fashion.
+    if (er) {
+      if ((er.code === 'ENOENT' ||
+        er.code === 'EACCES' ||
+        er.code === 'EPERM') && process.platform === 'win32') {
+        self.ready = true
+        self.emit('ready')
+        self.emit('end')
+        self.emit('close')
+        self.end = self._finish = function () {}
+      } else return self.error(er)
+    }
+    finish(self)
+  })
+}
+
+function finish (self) {
+  self.ready = true
+  self.emit('ready')
+  if (self._ended && !self._finished) self._finish()
+}
+
+LinkWriter.prototype.end = function () {
+  // console.error("LW finish in end")
+  this._ended = true
+  if (this.ready) {
+    this._finished = true
+    this._finish()
+  }
+}