Added JSON output to the cli and webpack plugin

README.md

@@ -56,7 +56,7 @@ new BundleAnalyzerPlugin(options?: object)
 
 |Name|Type|Description|
 |:--:|:--:|:----------|
-|**`analyzerMode`**|One of: `server`, `static`, `disabled`|Default: `server`. In `server` mode analyzer will start HTTP server to show bundle report. In `static` mode single HTML file with bundle report will be generated. In `disabled` mode you can use this plugin to just generate Webpack Stats JSON file by setting `generateStatsFile` to `true`. |
+|**`analyzerMode`**|One of: `server`, `static`, `json`, `disabled`|Default: `server`. In `server` mode analyzer will start HTTP server to show bundle report. In `static` mode single HTML file with bundle report will be generated. In `json` mode single JSON file with bundle report will be generated. In `disabled` mode you can use this plugin to just generate Webpack Stats JSON file by setting `generateStatsFile` to `true`. |
 |**`analyzerHost`**|`{String}`|Default: `127.0.0.1`. Host that will be used in `server` mode to start HTTP server.|
 |**`analyzerPort`**|`{Number}` or `auto`|Default: `8888`. Port that will be used in `server` mode to start HTTP server.|
 |**`reportFilename`**|`{String}`|Default: `report.html`. Path to bundle report file that will be generated in `static` mode. It can be either an absolute path or a path relative to a bundle output directory (which is output.path in webpack config).|
@@ -111,9 +111,10 @@ Directory containing all generated bundles.
 
 ```
   -V, --version               output the version number
-  -m, --mode <mode>           Analyzer mode. Should be `server` or `static`.
+  -m, --mode <mode>           Analyzer mode. Should be `server`, `static` or `json`.
                               In `server` mode analyzer will start HTTP server to show bundle report.
-                              In `static` mode single HTML file with bundle report will be generated. (default: server)
+                              In `static` mode single HTML file with bundle report will be generated.
+                              In `json` mode single JSON file with bundle report will be generated. (default: server)
   -h, --host <host>           Host that will be used in `server` mode to start HTTP server. (default: 127.0.0.1)
   -p, --port <n>              Port that will be used in `server` mode to start HTTP server. Should be a number or `auto` (default: 8888)
   -r, --report <file>         Path to bundle report file that will be generated in `static` mode. (default: report.html)

src/BundleAnalyzerPlugin.js

@@ -7,12 +7,11 @@ const Logger = require('./Logger');
 const viewer = require('./viewer');
 
 class BundleAnalyzerPlugin {
-
   constructor(opts = {}) {
     this.opts = {
       analyzerMode: 'server',
       analyzerHost: '127.0.0.1',
-      reportFilename: 'report.html',
+      reportFilename: null,
       defaultSizes: 'parsed',
       openAnalyzer: true,
       generateStatsFile: false,
@@ -51,6 +50,8 @@ class BundleAnalyzerPlugin {
         actions.push(() => this.startAnalyzerServer(stats.toJson()));
       } else if (this.opts.analyzerMode === 'static') {
         actions.push(() => this.generateStaticReport(stats.toJson()));
+      } else if (this.opts.analyzerMode === 'json') {
+        actions.push(() => this.generateJSONReport(stats.toJson()));
       }
 
       if (actions.length) {
@@ -115,10 +116,19 @@ class BundleAnalyzerPlugin {
     }
   }
 
+  async generateJSONReport(stats) {
+    await viewer.generateJSONReport(stats, {
+      reportFilename: path.resolve(this.compiler.outputPath, this.opts.reportFilename || 'report.json'),
+      bundleDir: this.getBundleDirFromCompiler(),
+      logger: this.logger,
+      excludeAssets: this.opts.excludeAssets
+    });
+  }
+
   async generateStaticReport(stats) {
     await viewer.generateReport(stats, {
       openBrowser: this.opts.openAnalyzer,
-      reportFilename: path.resolve(this.compiler.outputPath, this.opts.reportFilename),
+      reportFilename: path.resolve(this.compiler.outputPath, this.opts.reportFilename || 'report.html'),
       bundleDir: this.getBundleDirFromCompiler(),
       logger: this.logger,
       defaultSizes: this.opts.defaultSizes,

src/bin/analyzer.js

@@ -26,9 +26,10 @@ const program = commander
   )
   .option(
     '-m, --mode <mode>',
-    'Analyzer mode. Should be `server` or `static`.' +
-    br('In `server` mode analyzer will start HTTP server to show bundle report.') +
-    br('In `static` mode single HTML file with bundle report will be generated.'),
+    'Analyzer mode. Should be `server`,`static` or `json`.' +
+      br('In `server` mode analyzer will start HTTP server to show bundle report.') +
+      br('In `static` mode single HTML file with bundle report will be generated.') +
+      br('In `json` mode single JSON file with bundle report will be generated.'),
     'server'
   )
   .option(
@@ -45,8 +46,7 @@ const program = commander
   )
   .option(
     '-r, --report <file>',
-    'Path to bundle report file that will be generated in `static` mode.',
-    'report.html'
+    'Path to bundle report file that will be generated in `static` mode.'
   )
   .option(
     '-s, --default-sizes <type>',
@@ -86,7 +86,9 @@ let {
 const logger = new Logger(logLevel);
 
 if (!bundleStatsFile) showHelp('Provide path to Webpack Stats file as first argument');
-if (mode !== 'server' && mode !== 'static') showHelp('Invalid mode. Should be either `server` or `static`.');
+if (mode !== 'server' && mode !== 'static' && mode !== 'json') {
+  showHelp('Invalid mode. Should be either `server`, `static` or `json`.');
+}
 if (mode === 'server') {
   if (!host) showHelp('Invalid host name');
 
@@ -118,15 +120,22 @@ if (mode === 'server') {
     excludeAssets,
     logger: new Logger(logLevel)
   });
-} else {
+} else if (mode === 'static') {
   viewer.generateReport(bundleStats, {
     openBrowser,
-    reportFilename: resolve(reportFilename),
+    reportFilename: resolve(reportFilename || 'report.html'),
     defaultSizes,
     bundleDir,
     excludeAssets,
     logger: new Logger(logLevel)
   });
+} else if (mode === 'json') {
+  viewer.generateJSONReport(bundleStats, {
+    reportFilename: resolve(reportFilename || 'report.json'),
+    bundleDir,
+    excludeAssets,
+    logger: new Logger(logLevel)
+  });
 }
 
 function showHelp(error) {

src/viewer.js

@@ -20,6 +20,7 @@ const assetsRoot = path.join(projectRoot, 'public');
 module.exports = {
   startServer,
   generateReport,
+  generateJSONReport,
   // deprecated
   start: startServer
 };
@@ -121,7 +122,7 @@ async function startServer(bundleStats, opts) {
 async function generateReport(bundleStats, opts) {
   const {
     openBrowser = true,
-    reportFilename = 'report.html',
+    reportFilename,
     bundleDir = null,
     logger = new Logger(),
     defaultSizes = 'parsed',
@@ -158,9 +159,7 @@ async function generateReport(bundleStats, opts) {
           mkdir.sync(path.dirname(reportFilepath));
           fs.writeFileSync(reportFilepath, reportHtml);
 
-          logger.info(
-            `${bold('Webpack Bundle Analyzer')} saved report to ${bold(reportFilepath)}`
-          );
+          logger.info(`${bold('Webpack Bundle Analyzer')} saved report to ${bold(reportFilepath)}`);
 
           if (openBrowser) {
             opener(`file://${reportFilepath}`);
@@ -174,6 +173,19 @@ async function generateReport(bundleStats, opts) {
   });
 }
 
+async function generateJSONReport(bundleStats, opts) {
+  const {reportFilename, bundleDir = null, logger = new Logger(), excludeAssets = null} = opts || {};
+
+  const chartData = getChartData({logger, excludeAssets}, bundleStats, bundleDir);
+
+  if (!chartData) return;
+
+  mkdir.sync(path.dirname(reportFilename));
+  fs.writeFileSync(reportFilename, JSON.stringify(chartData));
+
+  logger.info(`${bold('Webpack Bundle Analyzer')} saved JSON report to ${bold(reportFilename)}`);
+}
+
 function getAssetContent(filename) {
   const assetPath = path.join(assetsRoot, filename);
 

test/analyzer.js

@@ -1,5 +1,6 @@
 const _ = require('lodash');
 const fs = require('fs');
+const path = require('path');
 const del = require('del');
 const childProcess = require('child_process');
 
@@ -106,18 +107,29 @@ describe('Analyzer', function () {
     generateReportFrom('with-modules-chunk.json');
     await expectValidReport({bundleLabel: 'bundle.mjs'});
   });
+
+  it('should support generating JSON output for the report', async function () {
+    generateJSONReportFrom('with-modules-in-chunks/stats.json');
+
+    const chartData = require(path.resolve(__dirname, 'output/report.json'));
+    expect(chartData).to.containSubset(require('./stats/with-modules-in-chunks/expected-chart-data'));
+  });
 });
 
+function generateJSONReportFrom(statsFilename) {
+  childProcess.execSync(`../lib/bin/analyzer.js -m json -r output/report.json stats/${statsFilename}`, {
+    cwd: __dirname
+  });
+}
+
 function generateReportFrom(statsFilename) {
   childProcess.execSync(`../lib/bin/analyzer.js -m static -r output/report.html -O stats/${statsFilename}`, {
     cwd: __dirname
   });
 }
 
 async function getChartData() {
-  return await nightmare
-    .goto(`file://${__dirname}/output/report.html`)
-    .evaluate(() => window.chartData);
+  return await nightmare.goto(`file://${__dirname}/output/report.html`).evaluate(() => window.chartData);
 }
 
 function forEachChartItem(chartData, cb) {

test/plugin.js

@@ -1,7 +1,7 @@
 const fs = require('fs');
 const del = require('del');
 const _ = require('lodash');
-
+const path = require('path');
 const BundleAnalyzerPlugin = require('../lib/BundleAnalyzerPlugin');
 
 describe('Plugin', function () {
@@ -47,6 +47,19 @@ describe('Plugin', function () {
     });
   });
 
+  it('should allow to generate json report', async function () {
+    const config = makeWebpackConfig({
+      analyzerOpts: {
+        analyzerMode: 'json'
+      }
+    });
+
+    await webpackCompile(config);
+
+    const chartData = await getChartDataFromJSONReport();
+    expect(chartData).to.exist;
+  });
+
   it('should support webpack config with `multi` module', async function () {
     const config = makeWebpackConfig();
 
@@ -58,11 +71,13 @@ describe('Plugin', function () {
     await webpackCompile(config);
 
     const chartData = await getChartDataFromReport();
-    expect(chartData[0].groups).to.containSubset([{
-      label: 'multi ./src/a.js ./src/b.js',
-      path: './multi ./src/a.js ./src/b.js',
-      groups: undefined
-    }]);
+    expect(chartData[0].groups).to.containSubset([
+      {
+        label: 'multi ./src/a.js ./src/b.js',
+        path: './multi ./src/a.js ./src/b.js',
+        groups: undefined
+      }
+    ]);
   });
 
   describe('options', function () {
@@ -104,9 +119,11 @@ describe('Plugin', function () {
     });
   }
 
+  function getChartDataFromJSONReport(reportFilename = 'report.json') {
+    return require(path.resolve(__dirname, `output/${reportFilename}`));
+  }
+
   async function getChartDataFromReport(reportFilename = 'report.html') {
-    return await nightmare
-      .goto(`file://${__dirname}/output/${reportFilename}`)
-      .evaluate(() => window.chartData);
+    return await nightmare.goto(`file://${__dirname}/output/${reportFilename}`).evaluate(() => window.chartData);
   }
 });