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import type { AstroAdapter, AstroConfig, AstroIntegration } from 'astro';
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 default function vercelEdge(): AstroIntegration {
let _config: AstroConfig;
let buildTempFolder: URL;
let functionFolder: URL;
let serverEntry: string;
return {
name: PACKAGE_NAME,
hooks: {
'astro:config:setup': ({ config }) => {
config.outDir = getVercelOutput(config.root);
},
'astro:config:done': ({ setAdapter, config }) => {
setAdapter(getAdapter());
_config = config;
if (config.output === 'static') {
throw new Error(`
[@astrojs/vercel] \`output: "server"\` is required to use the serverless adapter.
`);
}
},
'astro:build:start': async ({ buildConfig }) => {
buildConfig.serverEntry = serverEntry = 'entry.js';
buildConfig.client = new URL('./static/', _config.outDir);
buildConfig.server = buildTempFolder = new URL('./dist/', _config.root);
functionFolder = new URL('./functions/render.func/', _config.outDir);
},
'astro:build:done': async ({ routes }) => {
// Copy necessary files (e.g. node_modules/)
const { handler } = await copyDependenciesToFunction(
new URL(serverEntry, buildTempFolder),
functionFolder
);
// 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' },
],
});
},
},
};
}
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`;
}
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