const bfj = require('bfj');
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const path = require('path');
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const mkdir = require('mkdirp');
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const {bold} = require('chalk');
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const Logger = require('./Logger');
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const viewer = require('./viewer');
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const utils = require('./utils');
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class BundleAnalyzerPlugin {
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constructor(opts = {}) {
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this.opts = {
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analyzerMode: 'server',
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analyzerHost: '127.0.0.1',
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reportFilename: null,
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reportTitle: utils.defaultTitle,
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defaultSizes: 'parsed',
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openAnalyzer: true,
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generateStatsFile: false,
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statsFilename: 'stats.json',
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statsOptions: null,
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excludeAssets: null,
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logLevel: 'info',
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// deprecated
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startAnalyzer: true,
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...opts,
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analyzerPort: 'analyzerPort' in opts ? (opts.analyzerPort === 'auto' ? 0 : opts.analyzerPort) : 8888
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};
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this.server = null;
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this.logger = new Logger(this.opts.logLevel);
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}
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apply(compiler) {
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this.compiler = compiler;
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const done = (stats, callback) => {
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callback = callback || (() => {});
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const actions = [];
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if (this.opts.generateStatsFile) {
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actions.push(() => this.generateStatsFile(stats.toJson(this.opts.statsOptions)));
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}
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// Handling deprecated `startAnalyzer` flag
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if (this.opts.analyzerMode === 'server' && !this.opts.startAnalyzer) {
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this.opts.analyzerMode = 'disabled';
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}
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if (this.opts.analyzerMode === 'server') {
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actions.push(() => this.startAnalyzerServer(stats.toJson()));
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} else if (this.opts.analyzerMode === 'static') {
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actions.push(() => this.generateStaticReport(stats.toJson()));
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} else if (this.opts.analyzerMode === 'json') {
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actions.push(() => this.generateJSONReport(stats.toJson()));
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}
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if (actions.length) {
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// Making analyzer logs to be after all webpack logs in the console
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setImmediate(async () => {
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try {
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await Promise.all(actions.map(action => action()));
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callback();
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} catch (e) {
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callback(e);
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}
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});
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} else {
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callback();
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}
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};
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if (compiler.hooks) {
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compiler.hooks.done.tapAsync('webpack-bundle-analyzer', done);
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} else {
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compiler.plugin('done', done);
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}
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}
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async generateStatsFile(stats) {
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const statsFilepath = path.resolve(this.compiler.outputPath, this.opts.statsFilename);
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mkdir.sync(path.dirname(statsFilepath));
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try {
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await bfj.write(statsFilepath, stats, {
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space: 2,
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promises: 'ignore',
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buffers: 'ignore',
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maps: 'ignore',
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iterables: 'ignore',
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circular: 'ignore'
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});
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this.logger.info(
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`${bold('Webpack Bundle Analyzer')} saved stats file to ${bold(statsFilepath)}`
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);
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} catch (error) {
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this.logger.error(
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`${bold('Webpack Bundle Analyzer')} error saving stats file to ${bold(statsFilepath)}: ${error}`
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);
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}
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}
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async startAnalyzerServer(stats) {
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if (this.server) {
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(await this.server).updateChartData(stats);
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} else {
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this.server = viewer.startServer(stats, {
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openBrowser: this.opts.openAnalyzer,
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host: this.opts.analyzerHost,
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port: this.opts.analyzerPort,
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reportTitle: this.opts.reportTitle,
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bundleDir: this.getBundleDirFromCompiler(),
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logger: this.logger,
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defaultSizes: this.opts.defaultSizes,
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excludeAssets: this.opts.excludeAssets
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});
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}
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}
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async generateJSONReport(stats) {
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await viewer.generateJSONReport(stats, {
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reportFilename: path.resolve(this.compiler.outputPath, this.opts.reportFilename || 'report.json'),
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bundleDir: this.getBundleDirFromCompiler(),
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logger: this.logger,
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excludeAssets: this.opts.excludeAssets
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});
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}
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async generateStaticReport(stats) {
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await viewer.generateReport(stats, {
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openBrowser: this.opts.openAnalyzer,
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reportFilename: path.resolve(this.compiler.outputPath, this.opts.reportFilename || 'report.html'),
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reportTitle: this.opts.reportTitle,
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bundleDir: this.getBundleDirFromCompiler(),
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logger: this.logger,
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defaultSizes: this.opts.defaultSizes,
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excludeAssets: this.opts.excludeAssets
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});
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}
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getBundleDirFromCompiler() {
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switch (this.compiler.outputFileSystem.constructor.name) {
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case 'MemoryFileSystem':
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return null;
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// Detect AsyncMFS used by Nuxt 2.5 that replaces webpack's MFS during development
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// Related: #274
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case 'AsyncMFS':
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return null;
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default:
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return this.compiler.outputPath;
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}
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}
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}
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module.exports = BundleAnalyzerPlugin;
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