mirror of
https://github.com/withastro/astro.git
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84 lines
2.5 KiB
TypeScript
84 lines
2.5 KiB
TypeScript
import type { AstroAdapter, AstroConfig, AstroIntegration } from 'astro';
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import type { PathLike } from 'fs';
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import fs from 'fs/promises';
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import esbuild from 'esbuild';
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import { fileURLToPath } from 'url';
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const writeJson = (path: PathLike, data: any) =>
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fs.writeFile(path, JSON.stringify(data), { encoding: 'utf-8' });
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const ENTRYFILE = '__astro_entry';
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export function getAdapter(): AstroAdapter {
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return {
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name: '@astrojs/vercel',
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serverEntrypoint: '@astrojs/vercel/server-entrypoint',
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exports: ['default'],
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};
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}
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export default function vercel(): AstroIntegration {
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let _config: AstroConfig;
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return {
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name: '@astrojs/vercel',
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hooks: {
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'astro:config:setup': ({ config }) => {
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config.outDir = new URL('./.output/', config.root);
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config.build.format = 'directory';
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},
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'astro:config:done': ({ setAdapter, config }) => {
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setAdapter(getAdapter());
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_config = config;
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},
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'astro:build:start': async ({ buildConfig }) => {
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buildConfig.serverEntry = `${ENTRYFILE}.mjs`;
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buildConfig.client = new URL('./static/', _config.outDir);
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buildConfig.server = new URL('./server/tmp/', _config.outDir);
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},
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'astro:build:done': async ({ routes }) => {
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/*
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Why do we need two folders? Why don't we just generate all inside `server/pages/`?
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When the app builds, it throws some metadata inside a `chunks/` folder.
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./server/
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pages/
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__astro_entry.mjs
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chunks/
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(lots of js files)
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Those chunks will count as serverless functions (which cost money), so we
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need to bundle as much as possible in one file. Hence, the following code
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*/
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const tmpDir = new URL('./server/tmp/', _config.outDir);
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const bundleDir = new URL('./server/pages/', _config.outDir);
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await fs.mkdir(bundleDir, { recursive: true });
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// Convert server entry to CommonJS
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await esbuild.build({
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entryPoints: [fileURLToPath(new URL(`./${ENTRYFILE}.mjs`, tmpDir))],
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outfile: fileURLToPath(new URL(`./${ENTRYFILE}.js`, bundleDir)),
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bundle: true,
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format: 'cjs',
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platform: 'node',
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target: 'node14',
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});
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await fs.rm(tmpDir, { recursive: true });
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// Routes Manifest
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// https://vercel.com/docs/file-system-api#configuration/routes
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await writeJson(new URL(`./routes-manifest.json`, _config.outDir), {
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version: 3,
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basePath: '/',
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pages404: false,
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rewrites: routes.map((route) => ({
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source: route.pathname,
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destination: `/${ENTRYFILE}`,
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})),
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});
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},
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},
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};
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}
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