# all files / lib/ link-reader.js

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     // Basically just a wrapper around an fs.readlink
    //
    // XXX: Enhance this to support the Link type, by keeping
    // a lookup table of {<dev+inode>:<path>}, so that hardlinks
    // can be preserved in tarballs.

    module.exports = LinkReader

    var fs = require('graceful-fs')
    var inherits = require('inherits')
    var Reader = require('./reader.js')

    inherits(LinkReader, Reader)

    function LinkReader (props) {
      var self = this
      if (!(self instanceof LinkReader)) {
        throw new Error('LinkReader must be called as constructor.')
      }

      if (!((props.type === 'Link' && props.Link) ||
        (props.type === 'SymbolicLink' && props.SymbolicLink))) {
        throw new Error('Non-link type ' + props.type)
      }

      Reader.call(self, props)
    }

    // When piping a LinkReader into a LinkWriter, we have to
    // already have the linkpath property set, so that has to
    // happen *before* the "ready" event, which means we need to
    // override the _stat method.
    LinkReader.prototype._stat = function (currentStat) {
      var self = this
      fs.readlink(self._path, function (er, linkpath) {
        if (er) return self.error(er)
        self.linkpath = self.props.linkpath = linkpath
        self.emit('linkpath', linkpath)
        Reader.prototype._stat.call(self, currentStat)
      })
    }

    LinkReader.prototype._read = function () {
      var self = this
      if (self._paused) return
      // basically just a no-op, since we got all the info we need
      // from the _stat method
      if (!self._ended) {
        self.emit('end')
        self.emit('close')
        self._ended = true
      }
    }