a372edae48
* Default `target` in `loadConfig` instead of `next build` We should set the target from the environment variable during `loadConfig` instead of in `next build`. This ensures all other locations in Next.js that rely on `config` can read the correct value to toggle behaviors. * Use object destructuring * Add tests for builder target * Run start with serverless
111 lines
2.8 KiB
TypeScript
111 lines
2.8 KiB
TypeScript
import os from 'os'
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import findUp from 'find-up'
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import { CONFIG_FILE } from '../lib/constants'
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const targets = ['server', 'serverless']
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const defaultConfig: { [key: string]: any } = {
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env: [],
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webpack: null,
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webpackDevMiddleware: null,
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distDir: '.next',
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assetPrefix: '',
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configOrigin: 'default',
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useFileSystemPublicRoutes: true,
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generateBuildId: () => null,
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generateEtags: true,
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pageExtensions: ['tsx', 'ts', 'jsx', 'js'],
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target: process.env.__NEXT_BUILDER_EXPERIMENTAL_TARGET || 'server',
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poweredByHeader: true,
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onDemandEntries: {
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maxInactiveAge: 60 * 1000,
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pagesBufferLength: 2,
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},
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amp: {
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canonicalBase: '',
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},
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experimental: {
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cpus: Math.max(
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1,
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(Number(process.env.CIRCLE_NODE_TOTAL) ||
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(os.cpus() || { length: 1 }).length) - 1
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),
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dynamicRouting: false,
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autoExport: false,
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ampBindInitData: false,
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exportTrailingSlash: true,
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terserLoader: false,
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profiling: false,
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flyingShuttle: false,
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asyncToPromises: false,
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},
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}
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function assignDefaults(userConfig: { [key: string]: any }) {
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Object.keys(userConfig).forEach((key: string) => {
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const maybeObject = userConfig[key]
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if (!!maybeObject && maybeObject.constructor === Object) {
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userConfig[key] = {
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...(defaultConfig[key] || {}),
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...userConfig[key],
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}
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}
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})
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return { ...defaultConfig, ...userConfig }
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}
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function normalizeConfig(phase: string, config: any) {
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if (typeof config === 'function') {
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config = config(phase, { defaultConfig })
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if (typeof config.then === 'function') {
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throw new Error(
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'> Promise returned in next config. https://err.sh/zeit/next.js/promise-in-next-config.md'
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)
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}
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}
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return config
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}
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export default function loadConfig(
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phase: string,
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dir: string,
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customConfig: any
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) {
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if (customConfig) {
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return assignDefaults({ configOrigin: 'server', ...customConfig })
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}
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const path = findUp.sync(CONFIG_FILE, {
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cwd: dir,
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})
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// If config file was found
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if (path && path.length) {
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const userConfigModule = require(path)
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const userConfig = normalizeConfig(
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phase,
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userConfigModule.default || userConfigModule
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)
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if (userConfig.target && !targets.includes(userConfig.target)) {
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throw new Error(
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`Specified target is invalid. Provided: "${
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userConfig.target
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}" should be one of ${targets.join(', ')}`
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)
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}
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if (userConfig.amp && userConfig.amp.canonicalBase) {
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const { canonicalBase } = userConfig.amp || ({} as any)
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userConfig.amp = userConfig.amp || {}
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userConfig.amp.canonicalBase =
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(canonicalBase.endsWith('/')
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? canonicalBase.slice(0, -1)
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: canonicalBase) || ''
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}
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return assignDefaults({ configOrigin: CONFIG_FILE, ...userConfig })
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}
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return defaultConfig
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}
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