mirror of https://github.com/embarklabs/embark.git
100 lines
3.6 KiB
JavaScript
100 lines
3.6 KiB
JavaScript
const {PerformanceObserver, performance} = require('perf_hooks');
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const _ = require('underscore');
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require('colors');
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const i18n = require('../i18n/i18n.js');
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i18n.setOrDetectLocale('en');
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class NpmTimer{
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constructor(options){
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this._logger = (options.logger && typeof options.logger.info == 'function') ? options.logger : console;
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this._packageName = options.packageName;
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this._version = options.version;
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this._showSpinner = options.showSpinner || false;
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this._spinnerStyle = options.spinnerStyle || 'dots';
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this._interval = options.interval || 750;
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// define mark and measurement names
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this._startMark = 'downloadStart' + this._packageName + this._version;
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this._ongoingMark = 'downloadOngoingMark' + this._packageName + this._version;
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this._downloadOngoing = 'downloadOngoing' + this._packageName + this._version;
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this._endMark = 'downloadEnd' + this._packageName + this._version;
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this._downloadComplete = 'downloadComplete' + this._packageName + this._version;
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this.observer.observe({entryTypes: ['measure']});
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}
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get observer(){
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if(typeof this._observer == 'undefined'){
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this._observer = new PerformanceObserver((items) => {
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let entry;
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let strDuration;
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// find any download ongoing measurements we've made
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entry = _.last(_.where(items.getEntries(), {name: this._downloadOngoing}));
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if(entry){
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// ongoing performance mark
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strDuration = __('Downloading and installing {{packageName}} {{version}}... ({{duration}}ms elapsed)', {packageName: this._packageName, version: this._version, duration: entry.duration});
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if(this._spinner) this._spinner.text = strDuration;
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}
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else{
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// otherwise, find our download complete measurement
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entry = _.last(_.where(items.getEntries(), {name: this._downloadComplete}));
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if(entry){
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strDuration = __('Finished downloading and installing {{packageName}} {{version}} in {{duration}}ms', {packageName: this._packageName, version: this._version, duration: entry.duration});
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performance.clearMarks();
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if(this._spinner) this._spinner.succeed(strDuration);
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}
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}
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// log our measurement and make it red if it has taken too long
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if(!this._showSpinner && entry && strDuration){
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if(entry.duration > 4000){
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strDuration = strDuration.red;
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}
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this._logger.info(strDuration);
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}
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});
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}
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return this._observer;
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}
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start(){
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let self = this;
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const strDownloadStart = __("Downloading and installing {{packageName}} {{version}}...", {packageName: this._packageName, version: this._version});
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if(this._showSpinner){
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const ora = require('ora');
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this._spinner = ora({
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spinner: this._spinnerStyle,
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text: strDownloadStart
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}).start();
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}else{
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this._logger.info(strDownloadStart);
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}
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// mark our start time
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performance.mark(this._startMark);
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// function that continually updates the console to show user that we're downloading a library
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this._intOngoingDownload = setInterval(
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function(){
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performance.mark(self._ongoingMark);
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performance.measure(self._downloadOngoing, self._startMark, self._ongoingMark);
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}, this._interval);
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}
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end(){
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// stop updating console for ongoing download
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clearInterval(this._intOngoingDownload);
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performance.mark(this._endMark);
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performance.measure(this._downloadComplete, this._startMark, this._endMark);
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}
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}
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module.exports = NpmTimer;
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