import path from 'path' import _ from 'lodash' import htmlMinifier from 'html-minifier' import Chalk from 'chalk' import fsExtra from 'fs-extra' import consola from 'consola' import { isUrl, promisifyRoute, waitFor, flatRoutes } from '../common/utils' export default class Generator { constructor(nuxt, builder) { this.nuxt = nuxt this.options = nuxt.options this.builder = builder // Set variables this.staticRoutes = path.resolve(this.options.srcDir, this.options.dir.static) this.srcBuiltPath = path.resolve(this.options.buildDir, 'dist', 'client') this.distPath = path.resolve(this.options.rootDir, this.options.generate.dir) this.distNuxtPath = path.join( this.distPath, isUrl(this.options.build.publicPath) ? '' : this.options.build.publicPath ) } async generate({ build = true, init = true } = {}) { consola.debug('Initializing generator...') await this.initiate({ build, init }) consola.debug('Preparing routes for generate...') const routes = await this.initRoutes() consola.info({ message: 'Generating pages', badge: true, clear: true }) const errors = await this.generateRoutes(routes) await this.afterGenerate() // Done hook await this.nuxt.callHook('generate:done', this, errors) return { errors } } async initiate({ build = true, init = true } = {}) { // Wait for nuxt be ready await this.nuxt.ready() // Call before hook await this.nuxt.callHook('generate:before', this, this.options.generate) if (build) { // Add flag to set process.static this.builder.forGenerate() // Start build process await this.builder.build() } // Initialize dist directory if (init) { await this.initDist() } } async initRoutes(...args) { // Resolve config.generate.routes promises before generating the routes let generateRoutes = [] if (this.options.router.mode !== 'hash') { try { generateRoutes = await promisifyRoute( this.options.generate.routes || [], ...args ) } catch (e) { consola.error('Could not resolve routes') throw e // eslint-disable-line no-unreachable } } // Generate only index.html for router.mode = 'hash' let routes = this.options.router.mode === 'hash' ? ['/'] : flatRoutes(this.options.router.routes) routes = this.decorateWithPayloads(routes, generateRoutes) // extendRoutes hook await this.nuxt.callHook('generate:extendRoutes', routes) return routes } async generateRoutes(routes) { const errors = [] // Start generate process while (routes.length) { let n = 0 await Promise.all( routes .splice(0, this.options.generate.concurrency) .map(async ({ route, payload }) => { await waitFor(n++ * this.options.generate.interval) await this.generateRoute({ route, payload, errors }) }) ) } // Improve string representation for errors errors.toString = () => this._formatErrors(errors) return errors } _formatErrors(errors) { return errors .map(({ type, route, error }) => { const isHandled = type === 'handled' const bgColor = isHandled ? 'bgYellow' : 'bgRed' const color = isHandled ? 'yellow' : 'red' let line = Chalk.black[bgColor](' GEN ERR ') + Chalk[color](` ${route}\n\n`) if (isHandled) { line += Chalk.grey(JSON.stringify(error, undefined, 2) + '\n') } else { line += Chalk.grey(error.stack) } return line }) .join('\n') } async afterGenerate() { const { fallback } = this.options.generate // Disable SPA fallback if value isn't true or a string if (fallback !== true && typeof fallback !== 'string') return const fallbackPath = path.join(this.distPath, fallback) // Prevent conflicts if (fsExtra.existsSync(fallbackPath)) { consola.warn(`SPA fallback was configured, but the configured path (${fallbackPath}) already exists.`) return } // Render and write the SPA template to the fallback path const { html } = await this.nuxt.renderRoute('/', { spa: true }) await fsExtra.writeFile(fallbackPath, html, 'utf8') } async initDist() { // Clean destination folder await fsExtra.remove(this.distPath) await this.nuxt.callHook('generate:distRemoved', this) // Copy static and built files /* istanbul ignore if */ if (fsExtra.existsSync(this.staticRoutes)) { await fsExtra.copy(this.staticRoutes, this.distPath) } await fsExtra.copy(this.srcBuiltPath, this.distNuxtPath) // Add .nojekyll file to let GitHub Pages add the _nuxt/ folder // https://help.github.com/articles/files-that-start-with-an-underscore-are-missing/ const nojekyllPath = path.resolve(this.distPath, '.nojekyll') fsExtra.writeFile(nojekyllPath, '') await this.nuxt.callHook('generate:distCopied', this) } decorateWithPayloads(routes, generateRoutes) { const routeMap = {} // Fill routeMap for known routes routes.forEach((route) => { routeMap[route] = { route, payload: null } }) // Fill routeMap with given generate.routes generateRoutes.forEach((route) => { // route is either a string or like { route : '/my_route/1', payload: {} } const path = _.isString(route) ? route : route.route routeMap[path] = { route: path, payload: route.payload || null } }) return _.values(routeMap) } async generateRoute({ route, payload = {}, errors = [] }) { let html const pageErrors = [] try { const res = await this.nuxt.renderer.renderRoute(route, { _generate: true, payload }) html = res.html if (res.error) { pageErrors.push({ type: 'handled', route, error: res.error }) } } catch (err) { /* istanbul ignore next */ pageErrors.push({ type: 'unhandled', route, error: err }) Array.prototype.push.apply(errors, pageErrors) await this.nuxt.callHook('generate:routeFailed', { route, errors: pageErrors }) return false } if (this.options.generate.minify) { try { html = htmlMinifier.minify(html, this.options.generate.minify) } catch (err) /* istanbul ignore next */ { const minifyErr = new Error( `HTML minification failed. Make sure the route generates valid HTML. Failed HTML:\n ${html}` ) pageErrors.push({ type: 'unhandled', route, error: minifyErr }) } } let _path if (this.options.generate.subFolders) { _path = path.join(route, path.sep, 'index.html') // /about -> /about/index.html _path = _path === '/404/index.html' ? '/404.html' : _path // /404 -> /404.html } else { _path = route.length > 1 ? path.join(path.sep, route + '.html') : path.join(path.sep, 'index.html') } // Call hook to let user update the path & html const page = { route, path: _path, html } await this.nuxt.callHook('generate:page', page) page.path = path.join(this.distPath, page.path) // Make sure the sub folders are created await fsExtra.mkdirp(path.dirname(page.path)) await fsExtra.writeFile(page.path, page.html, 'utf8') await this.nuxt.callHook('generate:routeCreated', { route, path: page.path, errors: pageErrors }) if (pageErrors.length) { consola.error('Error generating ' + route) Array.prototype.push.apply(errors, pageErrors) } else { consola.success('Generated ' + route) } return true } }