| 1 |
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| 2 | function sync (fn) {
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| 3 | var res
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| 4 | var tries = 3
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| 5 |
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| 6 | while (--tries) {
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| 7 | try {
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| 8 | res = fn()
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| 9 | } catch (err) {
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| 10 | if (err.code === 'EEXIST') continue
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| 11 |
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| 12 | throw err
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| 13 | }
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| 14 |
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| 15 | return res
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| 16 | }
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| 17 |
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| 18 | throw new Error('Failed to find unique name')
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| 19 | }
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| 20 |
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| 21 | function async (fn, cb) {
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| 22 | var tries = 3
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| 23 |
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| 24 | ;(function next () {
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| 25 | fn(function (err, res) {
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| 26 | if (!err) return cb(null, res)
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| 27 | if (err.code !== 'EEXIST') return cb(err)
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| 28 | if (--tries === 0) return cb(new Error('Failed to find unique name'))
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| 29 |
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| 30 | next()
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| 31 | })
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| 32 | }())
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| 33 | }
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| 34 |
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| 35 | exports.sync = sync
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| 36 | exports.async = async
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