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20 lines
511 B
20 lines
511 B
6 years ago
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module.exports = promisify
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function promisify (fn, args) {
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if (typeof Promise === 'undefined') {
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throw new Error('Please run in a Promise supported environment or provide a callback')
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}
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return new Promise(function (resolve, reject) {
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args = [].slice.call(args).concat([callback])
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fn.apply(null, args)
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function callback (error, port) {
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if (error || port === false) {
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reject(error || new Error('No open port found'))
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} else {
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resolve(port)
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}
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}
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})
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}
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