import { validate, isJS, onEmit } from './util' export default class VueSSRServerPlugin { constructor(options = {}) { this.options = Object.assign({ filename: 'vue-ssr-server-bundle.json' }, options) } apply(compiler) { validate(compiler) onEmit(compiler, 'vue-server-plugin', (compilation, cb) => { const stats = compilation.getStats().toJson() const entryName = Object.keys(stats.entrypoints)[0] const entryInfo = stats.entrypoints[entryName] if (!entryInfo) { // #5553 return cb() } const entryAssets = entryInfo.assets.filter(isJS) if (entryAssets.length > 1) { throw new Error( `Server-side bundle should have one single entry file. ` + `Avoid using CommonsChunkPlugin in the server config.` ) } const entry = entryAssets[0] if (!entry || typeof entry !== 'string') { throw new Error( `Entry "${entryName}" not found. Did you specify the correct entry option?` ) } const bundle = { entry, files: {}, maps: {} } stats.assets.forEach((asset) => { if (isJS(asset.name)) { bundle.files[asset.name] = compilation.assets[asset.name].source() } else if (asset.name.match(/\.js\.map$/)) { bundle.maps[asset.name.replace(/\.map$/, '')] = JSON.parse(compilation.assets[asset.name].source()) } // do not emit anything else for server delete compilation.assets[asset.name] }) const json = JSON.stringify(bundle, null, 2) const filename = this.options.filename compilation.assets[filename] = { source: () => json, size: () => json.length } cb() }) } }