forked from lix-project/lix-website
59 lines
1.5 KiB
JavaScript
59 lines
1.5 KiB
JavaScript
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var Stream = require('stream');
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var Parse = require('./parse');
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var duplexer2 = require('duplexer2');
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var BufferStream = require('./BufferStream');
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// Backwards compatibility for node versions < 8
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if (!Stream.Writable || !Stream.Writable.prototype.destroy)
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Stream = require('readable-stream');
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function parseOne(match,opts) {
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var inStream = Stream.PassThrough({objectMode:true});
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var outStream = Stream.PassThrough();
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var transform = Stream.Transform({objectMode:true});
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var re = match instanceof RegExp ? match : (match && new RegExp(match));
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var found;
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transform._transform = function(entry,e,cb) {
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if (found || (re && !re.exec(entry.path))) {
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entry.autodrain();
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return cb();
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} else {
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found = true;
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out.emit('entry',entry);
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entry.on('error',function(e) {
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outStream.emit('error',e);
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});
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entry.pipe(outStream)
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.on('error',function(err) {
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cb(err);
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})
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.on('finish',function(d) {
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cb(null,d);
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});
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}
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};
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inStream.pipe(Parse(opts))
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.on('error',function(err) {
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outStream.emit('error',err);
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})
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.pipe(transform)
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.on('error',Object) // Silence error as its already addressed in transform
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.on('finish',function() {
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if (!found)
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outStream.emit('error',new Error('PATTERN_NOT_FOUND'));
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else
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outStream.end();
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});
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var out = duplexer2(inStream,outStream);
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out.buffer = function() {
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return BufferStream(outStream);
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};
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return out;
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}
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module.exports = parseOne;
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