sp-dev-fx-webparts/samples/react-carousel/gulpfile.js

'use strict';

// check if gulp dist was called
if (process.argv.indexOf('dist') !== -1) {
    // add ship options to command call
    process.argv.push('--ship');
}

const path = require('path');
const gulp = require('gulp');
const build = require('@microsoft/sp-build-web');
const gulpSequence = require('gulp-sequence');

build.addSuppression(`Warning - [sass] The local CSS class 'ms-Grid' is not camelCase and will not be type-safe.`);

// Create clean distrubution package
gulp.task('dist', gulpSequence('clean', 'bundle', 'package-solution'));
// Create clean development package
gulp.task('dev', gulpSequence('clean', 'bundle', 'package-solution'));



/**
 * Webpack Bundle Anlayzer
 * Reference and gulp task
 */
const bundleAnalyzer = require('webpack-bundle-analyzer');

build.configureWebpack.mergeConfig({

    additionalConfiguration: (generatedConfiguration) => {
        const lastDirName = path.basename(__dirname);
        const dropPath = path.join(__dirname, 'temp', 'stats');
        generatedConfiguration.plugins.push(new bundleAnalyzer.BundleAnalyzerPlugin({
            openAnalyzer: false,
            analyzerMode: 'static',
            reportFilename: path.join(dropPath, `${lastDirName}.stats.html`),
            generateStatsFile: true,
            statsFilename: path.join(dropPath, `${lastDirName}.stats.json`),
            logLevel: 'error'
        }));

        return generatedConfiguration;
    }

});


/**
 * Custom Framework Specific gulp tasks
 */

 var getTasks = build.rig.getTasks;
 build.rig.getTasks = function () {
   var result = getTasks.call(build.rig);
 
   result.set('serve', result.get('serve-deprecated'));
 
   return result;
 };

build.initialize(gulp);