Add compressionAlgorithm option

client/components/ModulesTreemap.jsx

@@ -18,11 +18,13 @@ import Search from './Search';
 import {store} from '../store';
 import ModulesList from './ModulesList';
 
-const SIZE_SWITCH_ITEMS = [
-  {label: 'Stat', prop: 'statSize'},
-  {label: 'Parsed', prop: 'parsedSize'},
-  {label: 'Gzipped', prop: 'gzipSize'}
-];
+function allSizeSwitchItems() {
+  return [
+    {label: 'Stat', prop: 'statSize'},
+    {label: 'Parsed', prop: 'parsedSize'},
+    {label: window.compressedSizeLabel, prop: 'gzipSize'}
+  ];
+}
 
 @observer
 export default class ModulesTreemap extends Component {
@@ -138,7 +140,7 @@ export default class ModulesTreemap extends Component {
   renderModuleSize(module, sizeType) {
     const sizeProp = `${sizeType}Size`;
     const size = module[sizeProp];
-    const sizeLabel = SIZE_SWITCH_ITEMS.find(item => item.prop === sizeProp).label;
+    const sizeLabel = allSizeSwitchItems().find(item => item.prop === sizeProp).label;
     const isActive = (store.activeSize === sizeProp);
 
     return (typeof size === 'number') ?
@@ -162,7 +164,8 @@ export default class ModulesTreemap extends Component {
   };
 
   @computed get sizeSwitchItems() {
-    return store.hasParsedSizes ? SIZE_SWITCH_ITEMS : SIZE_SWITCH_ITEMS.slice(0, 1);
+    const items = allSizeSwitchItems();
+    return store.hasParsedSizes ? items : items.slice(0, 1);
   }
 
   @computed get activeSizeItem() {

src/BundleAnalyzerPlugin.js

@@ -104,6 +104,7 @@ class BundleAnalyzerPlugin {
         host: this.opts.analyzerHost,
         port: this.opts.analyzerPort,
         reportTitle: this.opts.reportTitle,
+        compressionAlgorithm: this.opts.compressionAlgorithm,
         bundleDir: this.getBundleDirFromCompiler(),
         logger: this.logger,
         defaultSizes: this.opts.defaultSizes,
@@ -115,6 +116,7 @@ class BundleAnalyzerPlugin {
   async generateJSONReport(stats) {
     await viewer.generateJSONReport(stats, {
       reportFilename: path.resolve(this.compiler.outputPath, this.opts.reportFilename || 'report.json'),
+      compressionAlgorithm: this.opts.compressionAlgorithm,
       bundleDir: this.getBundleDirFromCompiler(),
       logger: this.logger,
       excludeAssets: this.opts.excludeAssets
@@ -126,6 +128,7 @@ class BundleAnalyzerPlugin {
       openBrowser: this.opts.openAnalyzer,
       reportFilename: path.resolve(this.compiler.outputPath, this.opts.reportFilename || 'report.html'),
       reportTitle: this.opts.reportTitle,
+      compressionAlgorithm: this.opts.compressionAlgorithm,
       bundleDir: this.getBundleDirFromCompiler(),
       logger: this.logger,
       defaultSizes: this.opts.defaultSizes,

src/analyzer.js

@@ -7,11 +7,16 @@ const Logger = require('./Logger');
 const Folder = require('./tree/Folder').default;
 const {parseBundle} = require('./parseUtils');
 const {createAssetsFilter} = require('./utils');
-const {gzipSize} = require('./sizeUtils');
+const {gzipSize, brotliSize} = require('./sizeUtils');
 
 const FILENAME_QUERY_REGEXP = /\?.*$/u;
 const FILENAME_EXTENSIONS = /\.(js|mjs)$/iu;
 
+const COMPRESSED_SIZE = {
+  gzip: gzipSize,
+  brotli: brotliSize
+};
+
 module.exports = {
   getViewerData,
   readStatsFromFile
@@ -21,11 +26,14 @@ function getViewerData(bundleStats, bundleDir, opts) {
   const {
     logger = new Logger(),
     excludeAssets = null,
-    compressedSize = gzipSize
+    compressionAlgorithm
   } = opts || {};
 
   const isAssetIncluded = createAssetsFilter(excludeAssets);
 
+  const compressedSize = COMPRESSED_SIZE[compressionAlgorithm];
+  if (!compressedSize) throw new Error(`Unsupported compression algorithm: ${compressionAlgorithm}.`);
+
   // Sometimes all the information is located in `children` array (e.g. problem in #10)
   if (_.isEmpty(bundleStats.assets) && !_.isEmpty(bundleStats.children)) {
     const {children} = bundleStats;

src/bin/analyzer.js

@@ -13,6 +13,8 @@ const utils = require('../utils');
 const SIZES = new Set(['stat', 'parsed', 'compressed']);
 const ACCEPTED_SIZES = new Set([...SIZES, 'gzip']);
 
+const ALGORITHMS = new Set(['gzip', 'brotli']);
+
 const program = commander
   .version(require('../../package.json').version)
   .usage(
@@ -59,6 +61,12 @@ const program = commander
     br(`Possible values: ${[...SIZES].join(', ')}`),
     'parsed'
   )
+  .option(
+    '--compression-algorithm <type>',
+    'Compression algorithm that will be used to calculate the compressed module sizes.' +
+      br(`Possible values: ${[...ALGORITHMS].join(', ')}`),
+    'gzip'
+  )
   .option(
     '-O, --no-open',
     "Don't open report in default browser automatically."
@@ -84,6 +92,7 @@ let {
   report: reportFilename,
   title: reportTitle,
   defaultSizes,
+  compressionAlgorithm,
   logLevel,
   open: openBrowser,
   exclude: excludeAssets,
@@ -108,6 +117,9 @@ if (mode === 'server') {
 if (!ACCEPTED_SIZES.has(defaultSizes)) {
   showHelp(`Invalid default sizes option. Possible values are: ${[...SIZES].join(', ')}`);
 }
+if (!ALGORITHMS.has(compressionAlgorithm)) {
+  showHelp(`Invalid compression algorithm option. Possible values are: ${[...ALGORITHMS].join(', ')}`);
+}
 
 bundleStatsFile = resolve(bundleStatsFile);
 
@@ -128,6 +140,7 @@ if (mode === 'server') {
     port,
     host,
     defaultSizes,
+    compressionAlgorithm,
     reportTitle,
     bundleDir,
     excludeAssets,
@@ -139,13 +152,15 @@ if (mode === 'server') {
     reportFilename: resolve(reportFilename || 'report.html'),
     reportTitle,
     defaultSizes,
+    compressionAlgorithm,
     bundleDir,
     excludeAssets,
     logger: new Logger(logLevel)
   });
 } else if (mode === 'json') {
   viewer.generateJSONReport(bundleStats, {
     reportFilename: resolve(reportFilename || 'report.json'),
+    compressionAlgorithm,
     bundleDir,
     excludeAssets,
     logger: new Logger(logLevel)
@@ -159,7 +174,7 @@ function showHelp(error) {
 }
 
 function br(str) {
-  return `\n${' '.repeat(28)}${str}`;
+  return `\n${' '.repeat(32)}${str}`;
 }
 
 function array() {

src/template.js

@@ -39,7 +39,7 @@ function getScript(filename, mode) {
   }
 }
 
-function renderViewer({title, enableWebSocket, chartData, defaultSizes, mode} = {}) {
+function renderViewer({title, enableWebSocket, chartData, defaultSizes, compressedSizeLabel, mode} = {}) {
   return html`<!DOCTYPE html>
 <html>
   <head>
@@ -59,6 +59,7 @@ function renderViewer({title, enableWebSocket, chartData, defaultSizes, mode} =
     <script>
       window.chartData = ${escapeJson(chartData)};
       window.defaultSizes = ${escapeJson(defaultSizes)};
+      window.compressedSizeLabel = ${escapeJson(compressedSizeLabel)};
     </script>
   </body>
 </html>`;

src/viewer.js

@@ -26,6 +26,10 @@ function resolveDefaultSizes(defaultSizes) {
   return defaultSizes === 'compressed' ? 'gzip' : defaultSizes;
 }
 
+function resolveCompressedSizeLabel(compressionAlgorithm) {
+  return {gzip: 'Gzipped', brotli: 'Brotli'}[compressionAlgorithm];
+}
+
 module.exports = {
   startServer,
   generateReport,
@@ -43,10 +47,11 @@ async function startServer(bundleStats, opts) {
     logger = new Logger(),
     defaultSizes = 'parsed',
     excludeAssets = null,
-    reportTitle
+    reportTitle,
+    compressionAlgorithm = 'gzip'
   } = opts || {};
 
-  const analyzerOpts = {logger, excludeAssets};
+  const analyzerOpts = {logger, excludeAssets, compressionAlgorithm};
 
   let chartData = getChartData(analyzerOpts, bundleStats, bundleDir);
 
@@ -64,6 +69,7 @@ async function startServer(bundleStats, opts) {
         title: resolveTitle(reportTitle),
         chartData,
         defaultSizes: resolveDefaultSizes(defaultSizes),
+        compressedSizeLabel: resolveCompressedSizeLabel(compressionAlgorithm),
         enableWebSocket: true
       });
       res.writeHead(200, {'Content-Type': 'text/html'});
@@ -130,13 +136,14 @@ async function generateReport(bundleStats, opts) {
     openBrowser = true,
     reportFilename,
     reportTitle,
+    compressionAlgorithm = 'gzip',
     bundleDir = null,
     logger = new Logger(),
     defaultSizes = 'parsed',
     excludeAssets = null
   } = opts || {};
 
-  const chartData = getChartData({logger, excludeAssets}, bundleStats, bundleDir);
+  const chartData = getChartData({logger, excludeAssets, compressionAlgorithm}, bundleStats, bundleDir);
 
   if (!chartData) return;
 
@@ -145,6 +152,7 @@ async function generateReport(bundleStats, opts) {
     title: resolveTitle(reportTitle),
     chartData,
     defaultSizes: resolveDefaultSizes(defaultSizes),
+    compressedSizeLabel: resolveCompressedSizeLabel(compressionAlgorithm),
     enableWebSocket: false
   });
   const reportFilepath = path.resolve(bundleDir || process.cwd(), reportFilename);
@@ -160,9 +168,10 @@ async function generateReport(bundleStats, opts) {
 }
 
 async function generateJSONReport(bundleStats, opts) {
-  const {reportFilename, bundleDir = null, logger = new Logger(), excludeAssets = null} = opts || {};
+  const {reportFilename, bundleDir = null, logger = new Logger(), excludeAssets = null,
+    compressionAlgorithm = 'gzip'} = opts || {};
 
-  const chartData = getChartData({logger, excludeAssets}, bundleStats, bundleDir);
+  const chartData = getChartData({logger, excludeAssets, compressionAlgorithm}, bundleStats, bundleDir);
 
   if (!chartData) return;
 

test/analyzer.js

@@ -216,6 +216,23 @@ describe('Analyzer', function () {
         expect(generatedReportTitle).to.match(/^webpack-bundle-analyzer \[.* at \d{2}:\d{2}\]/u);
       });
     });
+
+    describe('compression algorithm', function () {
+      it('should accept --compression-algorithm brotli', async function () {
+        generateReportFrom('with-modules-chunk.json', '--compression-algorithm brotli');
+        expect(await getCompressedSizeLabel()).to.equal('Brotli');
+      });
+
+      it('should accept --compression-algorithm gzip', async function () {
+        generateReportFrom('with-modules-chunk.json', '--compression-algorithm gzip');
+        expect(await getCompressedSizeLabel()).to.equal('Gzipped');
+      });
+
+      it('should default to gzip', async function () {
+        generateReportFrom('with-modules-chunk.json');
+        expect(await getCompressedSizeLabel()).to.equal('Gzipped');
+      });
+    });
   });
 });
 
@@ -241,6 +258,11 @@ async function getChartData() {
   return await nightmare.goto(`file://${__dirname}/output/report.html`).evaluate(() => window.chartData);
 }
 
+async function getCompressedSizeLabel() {
+  return await nightmare.goto(`file://${__dirname}/output/report.html`).evaluate(
+    () => window.compressedSizeLabel);
+}
+
 function forEachChartItem(chartData, cb) {
   for (const item of chartData) {
     cb(item);

test/plugin.js

@@ -170,6 +170,45 @@ describe('Plugin', function () {
         expect(error).to.equal(reportTitleError);
       });
     });
+
+    describe('compressionAlgorithm', function () {
+      it('should default to gzip', async function () {
+        const config = makeWebpackConfig({
+          analyzerOpts: {}
+        });
+        await webpackCompile(config, '4.44.2');
+        await expectValidReport({
+          parsedSize: 1311,
+          gzipSize: 342
+        });
+      });
+
+      it('should support gzip', async function () {
+        const config = makeWebpackConfig({
+          analyzerOpts: {
+            compressionAlgorithm: 'gzip'
+          }
+        });
+        await webpackCompile(config, '4.44.2');
+        await expectValidReport({
+          parsedSize: 1311,
+          gzipSize: 342
+        });
+      });
+
+      it('should support brotli', async function () {
+        const config = makeWebpackConfig({
+          analyzerOpts: {
+            compressionAlgorithm: 'brotli'
+          }
+        });
+        await webpackCompile(config, '4.44.2');
+        await expectValidReport({
+          parsedSize: 1311,
+          gzipSize: 302
+        });
+      });
+    });
   });
 
   async function expectValidReport(opts) {