BundleAnalyzerPlugin.js
3.46 KB
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const bfj = require('bfj-node4');
const path = require('path');
const mkdir = require('mkdirp');
const { bold } = require('chalk');
const Logger = require('./Logger');
const viewer = require('./viewer');
class BundleAnalyzerPlugin {
constructor(opts) {
this.opts = {
analyzerMode: 'server',
analyzerHost: '127.0.0.1',
analyzerPort: 8888,
reportFilename: 'report.html',
defaultSizes: 'parsed',
openAnalyzer: true,
generateStatsFile: false,
statsFilename: 'stats.json',
statsOptions: null,
excludeAssets: null,
logLevel: 'info',
// deprecated
startAnalyzer: true,
...opts
};
this.server = null;
this.logger = new Logger(this.opts.logLevel);
}
apply(compiler) {
this.compiler = compiler;
const done = stats => {
stats = stats.toJson(this.opts.statsOptions);
const actions = [];
if (this.opts.generateStatsFile) {
actions.push(() => this.generateStatsFile(stats));
}
// Handling deprecated `startAnalyzer` flag
if (this.opts.analyzerMode === 'server' && !this.opts.startAnalyzer) {
this.opts.analyzerMode = 'disabled';
}
if (this.opts.analyzerMode === 'server') {
actions.push(() => this.startAnalyzerServer(stats));
} else if (this.opts.analyzerMode === 'static') {
actions.push(() => this.generateStaticReport(stats));
}
if (actions.length) {
// Making analyzer logs to be after all webpack logs in the console
setImmediate(() => {
actions.forEach(action => action());
});
}
};
if (compiler.hooks) {
compiler.hooks.done.tap('webpack-bundle-analyzer', done);
} else {
compiler.plugin('done', done);
}
}
async generateStatsFile(stats) {
const statsFilepath = path.resolve(this.compiler.outputPath, this.opts.statsFilename);
mkdir.sync(path.dirname(statsFilepath));
try {
await bfj.write(statsFilepath, stats, {
space: 2,
promises: 'ignore',
buffers: 'ignore',
maps: 'ignore',
iterables: 'ignore',
circular: 'ignore'
});
this.logger.info(
`${bold('Webpack Bundle Analyzer')} saved stats file to ${bold(statsFilepath)}`
);
} catch (error) {
this.logger.error(
`${bold('Webpack Bundle Analyzer')} error saving stats file to ${bold(statsFilepath)}: ${error}`
);
}
}
async startAnalyzerServer(stats) {
if (this.server) {
(await this.server).updateChartData(stats);
} else {
this.server = viewer.startServer(stats, {
openBrowser: this.opts.openAnalyzer,
host: this.opts.analyzerHost,
port: this.opts.analyzerPort,
bundleDir: this.getBundleDirFromCompiler(),
logger: this.logger,
defaultSizes: this.opts.defaultSizes,
excludeAssets: this.opts.excludeAssets
});
}
}
generateStaticReport(stats) {
viewer.generateReport(stats, {
openBrowser: this.opts.openAnalyzer,
reportFilename: path.resolve(this.compiler.outputPath, this.opts.reportFilename),
bundleDir: this.getBundleDirFromCompiler(),
logger: this.logger,
defaultSizes: this.opts.defaultSizes,
excludeAssets: this.opts.excludeAssets
});
}
getBundleDirFromCompiler() {
return (this.compiler.outputFileSystem.constructor.name === 'MemoryFileSystem') ? null : this.compiler.outputPath;
}
}
module.exports = BundleAnalyzerPlugin;