next.config.js

const { THEME } = require('./blog.config')
const fs = require('fs')
const path = require('path')
const BLOG = require('./blog.config')

const withBundleAnalyzer = require('@next/bundle-analyzer')({
  enabled: BLOG.BUNDLE_ANALYZER
})

/**
 * 扫描指定目录下的文件夹名，用于获取当前有几个主题
 * @param {*} directory
 * @returns
 */
function scanSubdirectories(directory) {
  const subdirectories = []

  fs.readdirSync(directory).forEach(file => {
    const fullPath = path.join(directory, file)
    const stats = fs.statSync(fullPath)

    // landing主题比较特殊，不在可切换的主题中显示
    if (stats.isDirectory() && file !== 'landing') {
      subdirectories.push(file)
    }
  })

  return subdirectories
}
// 扫描项目 /themes下的目录名
const themes = scanSubdirectories(path.resolve(__dirname, 'themes'))
module.exports = withBundleAnalyzer({
  images: {
    // 图片压缩
    formats: ['image/avif', 'image/webp'],
    // 允许next/image加载的图片 域名
    domains: [
      'gravatar.com',
      'www.notion.so',
      'avatars.githubusercontent.com',
      'images.unsplash.com',
      'source.unsplash.com',
      'p1.qhimg.com',
      'webmention.io',
      'ko-fi.com'
    ]
  },
  // 默认将feed重定向至 /public/rss/feed.xml
  async redirects() {
    return [
      {
        source: '/feed',
        destination: '/rss/feed.xml',
        permanent: true
      }
    ]
  },
  async rewrites() {
    return [
      {
        source: '/:path*.html',
        destination: '/:path*'
      }
    ]
  },
  async headers() {
    return [
      {
        source: '/:path*{/}?',
        headers: [
          { key: 'Access-Control-Allow-Credentials', value: 'true' },
          { key: 'Access-Control-Allow-Origin', value: '*' },
          {
            key: 'Access-Control-Allow-Methods',
            value: 'GET,OPTIONS,PATCH,DELETE,POST,PUT'
          },
          {
            key: 'Access-Control-Allow-Headers',
            value:
              'X-CSRF-Token, X-Requested-With, Accept, Accept-Version, Content-Length, Content-MD5, Content-Type, Date, X-Api-Version'
          }
        ]
      }
    ]
  },
  webpack: (config, { dev, isServer }) => {
    // Replace React with Preact only in client production build
    // if (!dev && !isServer) {
    //   Object.assign(config.resolve.alias, {
    //     react: 'preact/compat',
    //     'react-dom/test-utils': 'preact/test-utils',
    //     'react-dom': 'preact/compat'
    //   })
    // }
    // 动态主题：添加 resolve.alias 配置，将动态路径映射到实际路径
    if (!isServer) {
      console.log('加载默认主题', path.resolve(__dirname, 'themes', THEME))
    }
    config.resolve.alias['@theme-components'] = path.resolve(__dirname, 'themes', THEME)
    return config
  },
  experimental: {
    scrollRestoration: true
  },
  exportPathMap: async function (defaultPathMap, { dev, dir, outDir, distDir, buildId }) {
    // 导出时 忽略/pages/sitemap.xml.js ， 否则报错getServerSideProps
    const pages = { ...defaultPathMap }
    delete pages['/sitemap.xml']
    return pages
  },
  publicRuntimeConfig: { // 这里的配置既可以服务端获取到，也可以在浏览器端获取到
    NODE_ENV_API: process.env.NODE_ENV_API || 'prod',
    THEMES: themes
  }
})