import fs from 'fs' import { copy, remove, writeFile, mkdirp } from 'fs-extra' import _ from 'lodash' import { resolve, join, dirname, sep } from 'path' import { minify } from 'html-minifier' import Tapable from 'tappable' import { isUrl, promisifyRoute, waitFor, flatRoutes } from 'utils' import Debug from 'debug' const debug = Debug('nuxt:generate') export default class Generator extends Tapable { constructor (nuxt, builder) { super() this.nuxt = nuxt this.options = nuxt.options this.builder = builder // Set variables this.generateRoutes = resolve(this.options.srcDir, 'static') this.srcBuiltPath = resolve(this.options.buildDir, 'dist') this.distPath = resolve(this.options.rootDir, this.options.generate.dir) this.distNuxtPath = join(this.distPath, (isUrl(this.options.build.publicPath) ? '' : this.options.build.publicPath)) } async generate ({ build = true, init = true } = {}) { const s = Date.now() let errors = [] // Wait for nuxt be ready await this.nuxt.ready() // Start build process if (this.builder && build) { await this.builder.build() } await this.nuxt.applyPluginsAsync('generator', this) // Initialize dist directory if (init) { await this.initDist() } // Resolve config.generate.routes promises before generating the routes let generateRoutes = [] if (this.options.router.mode !== 'hash') { try { console.log('Generating routes') // eslint-disable-line no-console generateRoutes = await promisifyRoute(this.options.generate.routes || []) await this.applyPluginsAsync('generateRoutes', {generator: this, generateRoutes}) } catch (e) { console.error('Could not resolve routes') // eslint-disable-line no-console console.error(e) // eslint-disable-line no-console 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) await this.applyPluginsAsync('generate', {generator: this, routes}) // 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}) })) } const duration = Math.round((Date.now() - s) / 100) / 10 debug(`HTML Files generated in ${duration}s`) if (errors.length) { const report = errors.map(({ type, route, error }) => { /* istanbul ignore if */ if (type === 'unhandled') { return `Route: '${route}'\n${error.stack}` } else { return `Route: '${route}' thrown an error: \n` + JSON.stringify(error) } }) console.error('==== Error report ==== \n' + report.join('\n\n')) // eslint-disable-line no-console } await this.applyPluginsAsync('generated', this) return { duration, errors } } async initDist () { // Clean destination folder await remove(this.distPath) debug('Destination folder cleaned') // Copy static and built files /* istanbul ignore if */ if (fs.existsSync(this.generateRoutes)) { await copy(this.generateRoutes, this.distPath) } await 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 = resolve(this.distPath, '.nojekyll') writeFile(nojekyllPath, '') debug('Static & build files copied') } decorateWithPayloads (routes, generateRoutes) { let 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"} 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 try { const res = await this.nuxt.renderer.renderRoute(route, { _generate: true, payload }) html = res.html if (res.error) { errors.push({ type: 'handled', route, error: res.error }) } } catch (err) { /* istanbul ignore next */ return errors.push({ type: 'unhandled', route, error: err }) } if (this.options.generate.minify) { try { html = 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}`) errors.push({ type: 'unhandled', route, error: minifyErr }) } } let path = join(route, sep, 'index.html') // /about -> /about/index.html path = (path === '/404/index.html') ? '/404.html' : path // /404 -> /404.html debug('Generate file: ' + path) path = join(this.distPath, path) // Make sure the sub folders are created await mkdirp(dirname(path)) await writeFile(path, html, 'utf8') return true } }