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53 lines
1.5 KiB
53 lines
1.5 KiB
// Basically just a wrapper around an fs.readlink |
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// |
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// XXX: Enhance this to support the Link type, by keeping |
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// a lookup table of {<dev+inode>:<path>}, so that hardlinks |
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// can be preserved in tarballs. |
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module.exports = LinkReader |
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var fs = require('graceful-fs') |
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var inherits = require('inherits') |
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var Reader = require('./reader.js') |
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inherits(LinkReader, Reader) |
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function LinkReader (props) { |
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var self = this |
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if (!(self instanceof LinkReader)) { |
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throw new Error('LinkReader must be called as constructor.') |
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} |
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if (!((props.type === 'Link' && props.Link) || |
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(props.type === 'SymbolicLink' && props.SymbolicLink))) { |
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throw new Error('Non-link type ' + props.type) |
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} |
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Reader.call(self, props) |
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} |
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// When piping a LinkReader into a LinkWriter, we have to |
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// already have the linkpath property set, so that has to |
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// happen *before* the "ready" event, which means we need to |
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// override the _stat method. |
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LinkReader.prototype._stat = function (currentStat) { |
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var self = this |
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fs.readlink(self._path, function (er, linkpath) { |
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if (er) return self.error(er) |
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self.linkpath = self.props.linkpath = linkpath |
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self.emit('linkpath', linkpath) |
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Reader.prototype._stat.call(self, currentStat) |
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}) |
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} |
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LinkReader.prototype._read = function () { |
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var self = this |
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if (self._paused) return |
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// basically just a no-op, since we got all the info we need |
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// from the _stat method |
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if (!self._ended) { |
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self.emit('end') |
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self.emit('close') |
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self._ended = true |
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} |
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}
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