vue hello world项目
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3 years ago
"use strict";
const fs = require('fs');
const path = require('path');
const {
bold
} = require('chalk');
const Logger = require('./Logger');
const viewer = require('./viewer');
const utils = require('./utils');
const {
writeStats
} = require('./statsUtils');
class BundleAnalyzerPlugin {
constructor(opts = {}) {
this.opts = {
analyzerMode: 'server',
analyzerHost: '127.0.0.1',
reportFilename: null,
reportTitle: utils.defaultTitle,
defaultSizes: 'parsed',
openAnalyzer: true,
generateStatsFile: false,
statsFilename: 'stats.json',
statsOptions: null,
excludeAssets: null,
logLevel: 'info',
// deprecated
startAnalyzer: true,
...opts,
analyzerPort: 'analyzerPort' in opts ? opts.analyzerPort === 'auto' ? 0 : opts.analyzerPort : 8888
};
this.server = null;
this.logger = new Logger(this.opts.logLevel);
}
apply(compiler) {
this.compiler = compiler;
const done = (stats, callback) => {
callback = callback || (() => {});
const actions = [];
if (this.opts.generateStatsFile) {
actions.push(() => this.generateStatsFile(stats.toJson(this.opts.statsOptions)));
} // 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.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) {
// Making analyzer logs to be after all webpack logs in the console
setImmediate(async () => {
try {
await Promise.all(actions.map(action => action()));
callback();
} catch (e) {
callback(e);
}
});
} else {
callback();
}
};
if (compiler.hooks) {
compiler.hooks.done.tapAsync('webpack-bundle-analyzer', done);
} else {
compiler.plugin('done', done);
}
}
async generateStatsFile(stats) {
const statsFilepath = path.resolve(this.compiler.outputPath, this.opts.statsFilename);
await fs.promises.mkdir(path.dirname(statsFilepath), {
recursive: true
});
try {
await writeStats(stats, statsFilepath);
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,
reportTitle: this.opts.reportTitle,
bundleDir: this.getBundleDirFromCompiler(),
logger: this.logger,
defaultSizes: this.opts.defaultSizes,
excludeAssets: this.opts.excludeAssets
});
}
}
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 || 'report.html'),
reportTitle: this.opts.reportTitle,
bundleDir: this.getBundleDirFromCompiler(),
logger: this.logger,
defaultSizes: this.opts.defaultSizes,
excludeAssets: this.opts.excludeAssets
});
}
getBundleDirFromCompiler() {
if (typeof this.compiler.outputFileSystem.constructor === 'undefined') {
return this.compiler.outputPath;
}
switch (this.compiler.outputFileSystem.constructor.name) {
case 'MemoryFileSystem':
return null;
// Detect AsyncMFS used by Nuxt 2.5 that replaces webpack's MFS during development
// Related: #274
case 'AsyncMFS':
return null;
default:
return this.compiler.outputPath;
}
}
}
module.exports = BundleAnalyzerPlugin;