diff options
Diffstat (limited to 'deps/npm/node_modules/fstream/lib/link-reader.js')
-rw-r--r-- | deps/npm/node_modules/fstream/lib/link-reader.js | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/deps/npm/node_modules/fstream/lib/link-reader.js b/deps/npm/node_modules/fstream/lib/link-reader.js new file mode 100644 index 0000000000..fb4cc67a98 --- /dev/null +++ b/deps/npm/node_modules/fstream/lib/link-reader.js @@ -0,0 +1,53 @@ +// 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 + } +} |