46 lines
1023 B
JavaScript
46 lines
1023 B
JavaScript
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var duplexer = require('duplexer')
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var through = require('through')
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module.exports = function () {
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var streams
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if(arguments.length == 1 && Array.isArray(arguments[0])) {
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streams = arguments[0]
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} else {
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streams = [].slice.call(arguments)
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}
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if(streams.length == 0)
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return through()
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else if(streams.length == 1)
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return streams[0]
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var first = streams[0]
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, last = streams[streams.length - 1]
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, thepipe = duplexer(first, last)
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//pipe all the streams together
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function recurse (streams) {
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if(streams.length < 2)
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return
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streams[0].pipe(streams[1])
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recurse(streams.slice(1))
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}
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recurse(streams)
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function onerror () {
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var args = [].slice.call(arguments)
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args.unshift('error')
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thepipe.emit.apply(thepipe, args)
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}
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//es.duplex already reemits the error from the first and last stream.
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//add a listener for the inner streams in the pipeline.
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for(var i = 1; i < streams.length - 1; i ++)
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streams[i].on('error', onerror)
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return thepipe
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}
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