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website/node_modules/npm/lib/utils/pulse-till-done.js

@@ -0,0 +1,38 @@
+'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())
+}