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pulse-till-done.js
'use strict' const validate = require('aproba') const log = require('npmlog') const Bluebird = require('bluebird') let pulsers = 0 let pulse function pulseStart (prefix) { if (++pulsers > 1) return pulse = setInterval(function () { log.gauge.pulse(prefix) }, 150) } function pulseStop () { if (--pulsers > 0) return clearInterval(pulse) } module.exports = function (prefix, cb) { validate('SF', [prefix, cb]) if (!prefix) prefix = 'network' pulseStart(prefix) return function () { pulseStop() cb.apply(null, arguments) } } module.exports.withPromise = pulseWhile function pulseWhile (prefix, promise) { if (!promise) { promise = prefix prefix = '' } pulseStart(prefix) return Bluebird.resolve(promise).finally(() => pulseStop()) }
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