import type { AstroAdapter, AstroConfig, AstroIntegration } from 'astro'; import glob from 'fast-glob'; import { pathToFileURL } from 'url'; import { defaultImageConfig, getImageConfig, throwIfAssetsNotEnabled, type VercelImageConfig, } from '../image/shared.js'; import { exposeEnv } from '../lib/env.js'; import { getVercelOutput, removeDir, writeJson } from '../lib/fs.js'; import { copyDependenciesToFunction } from '../lib/nft.js'; import { getRedirects } from '../lib/redirects.js'; const PACKAGE_NAME = '@astrojs/vercel/serverless'; function getAdapter(): AstroAdapter { return { name: PACKAGE_NAME, serverEntrypoint: `${PACKAGE_NAME}/entrypoint`, exports: ['default'], }; } export interface VercelServerlessConfig { includeFiles?: string[]; excludeFiles?: string[]; analytics?: boolean; imageService?: boolean; imagesConfig?: VercelImageConfig; } export default function vercelServerless({ includeFiles, excludeFiles, analytics, imageService, imagesConfig, }: VercelServerlessConfig = {}): AstroIntegration { let _config: AstroConfig; let buildTempFolder: URL; let functionFolder: URL; let serverEntry: string; return { name: PACKAGE_NAME, hooks: { 'astro:config:setup': ({ command, config, updateConfig, injectScript }) => { if (command === 'build' && analytics) { injectScript('page', 'import "@astrojs/vercel/analytics"'); } const outDir = getVercelOutput(config.root); const viteDefine = exposeEnv(['VERCEL_ANALYTICS_ID']); updateConfig({ outDir, build: { serverEntry: 'entry.mjs', client: new URL('./static/', outDir), server: new URL('./dist/', config.root), }, vite: { define: viteDefine, }, ...getImageConfig(imageService, imagesConfig, command), }); }, 'astro:config:done': ({ setAdapter, config }) => { throwIfAssetsNotEnabled(config, imageService); setAdapter(getAdapter()); _config = config; buildTempFolder = config.build.server; functionFolder = new URL('./functions/render.func/', config.outDir); serverEntry = config.build.serverEntry; if (config.output === 'static') { throw new Error(` [@astrojs/vercel] \`output: "server"\` or \`output: "hybrid"\` is required to use the serverless adapter. `); } }, 'astro:build:done': async ({ routes }) => { // Merge any includes from `vite.assetsInclude const inc = includeFiles?.map((file) => new URL(file, _config.root)) || []; if (_config.vite.assetsInclude) { const mergeGlobbedIncludes = (globPattern: unknown) => { if (typeof globPattern === 'string') { const entries = glob.sync(globPattern).map((p) => pathToFileURL(p)); inc.push(...entries); } else if (Array.isArray(globPattern)) { for (const pattern of globPattern) { mergeGlobbedIncludes(pattern); } } }; mergeGlobbedIncludes(_config.vite.assetsInclude); } // Copy necessary files (e.g. node_modules/) const { handler } = await copyDependenciesToFunction({ entry: new URL(serverEntry, buildTempFolder), outDir: functionFolder, includeFiles: inc, excludeFiles: excludeFiles?.map((file) => new URL(file, _config.root)) || [], }); // Remove temporary folder await removeDir(buildTempFolder); // Enable ESM // https://aws.amazon.com/blogs/compute/using-node-js-es-modules-and-top-level-await-in-aws-lambda/ await writeJson(new URL(`./package.json`, functionFolder), { type: 'module', }); // Serverless function config // https://vercel.com/docs/build-output-api/v3#vercel-primitives/serverless-functions/configuration await writeJson(new URL(`./.vc-config.json`, functionFolder), { runtime: getRuntime(), handler, launcherType: 'Nodejs', }); // Output configuration // https://vercel.com/docs/build-output-api/v3#build-output-configuration await writeJson(new URL(`./config.json`, _config.outDir), { version: 3, routes: [ ...getRedirects(routes, _config), { handle: 'filesystem' }, { src: '/.*', dest: 'render' }, ], ...(imageService || imagesConfig ? { images: imagesConfig ? imagesConfig : defaultImageConfig } : {}), }); }, }, }; } function getRuntime() { const version = process.version.slice(1); // 'v16.5.0' --> '16.5.0' const major = version.split('.')[0]; // '16.5.0' --> '16' return `nodejs${major}.x`; }