1 // Basically just a wrapper around an fs.readlink
3 // XXX: Enhance this to support the Link type, by keeping
4 // a lookup table of {<dev+inode>:<path>}, so that hardlinks
5 // can be preserved in tarballs.
7 module.exports = LinkReader
9 var fs = require('graceful-fs')
10 var inherits = require('inherits')
11 var Reader = require('./reader.js')
13 inherits(LinkReader, Reader)
15 function LinkReader (props) {
17 if (!(self instanceof LinkReader)) {
18 throw new Error('LinkReader must be called as constructor.')
21 if (!((props.type === 'Link' && props.Link) ||
22 (props.type === 'SymbolicLink' && props.SymbolicLink))) {
23 throw new Error('Non-link type ' + props.type)
26 Reader.call(self, props)
29 // When piping a LinkReader into a LinkWriter, we have to
30 // already have the linkpath property set, so that has to
31 // happen *before* the "ready" event, which means we need to
32 // override the _stat method.
33 LinkReader.prototype._stat = function (currentStat) {
35 fs.readlink(self._path, function (er, linkpath) {
36 if (er) return self.error(er)
37 self.linkpath = self.props.linkpath = linkpath
38 self.emit('linkpath', linkpath)
39 Reader.prototype._stat.call(self, currentStat)
43 LinkReader.prototype._read = function () {
45 if (self._paused) return
46 // basically just a no-op, since we got all the info we need
47 // from the _stat method