| 1 | var pull = require('pull-stream')
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| 2 |
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| 3 | function all(ary, abort, cb) {
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| 4 | var n = ary.length
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| 5 | ary.forEach(function (f) {
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| 6 | if(f) f(abort, next)
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| 7 | else next()
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| 8 | })
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| 9 |
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| 10 | function next() {
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| 11 | if(--n) return
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| 12 | cb(abort)
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| 13 | }
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| 14 | if(!n) next()
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| 15 | }
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| 16 |
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| 17 | module.exports = pull.Source(function (streams) {
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| 18 |
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| 19 | return function (abort, cb) {
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| 20 | ;(function next () {
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| 21 | if(abort)
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| 22 | all(streams, abort, cb)
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| 23 | else if(!streams.length)
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| 24 | cb(true)
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| 25 | else if(!streams[0])
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| 26 | streams.shift(), next()
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| 27 | else
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| 28 | streams[0](null, function (err, data) {
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| 29 | if(err) {
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| 30 | streams.shift()
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| 31 | if(err !== true)
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| 32 | abort = err
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| 33 | next()
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| 34 | }
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| 35 | else
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| 36 | cb(null, data)
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| 37 | })
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| 38 | })()
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| 39 | }
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| 40 | })
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