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import type { AstroAdapter, AstroConfig, AstroIntegration } from 'astro';
import { defaultImageConfig, getImageConfig, type VercelImageConfig } from '../image/shared.js';
import { exposeEnv } from '../lib/env.js';
import { emptyDir, getVercelOutput, writeJson } from '../lib/fs.js';
import { isServerLikeOutput } from '../lib/prerender.js';
import { getRedirects } from '../lib/redirects.js';
const PACKAGE_NAME = '@astrojs/vercel/static';
function getAdapter(): AstroAdapter {
return { name: PACKAGE_NAME };
}
export interface VercelStaticConfig {
analytics?: boolean;
imageService?: boolean;
imagesConfig?: VercelImageConfig;
}
export default function vercelStatic({
analytics,
imageService,
imagesConfig,
}: VercelStaticConfig = {}): AstroIntegration {
let _config: AstroConfig;
return {
name: '@astrojs/vercel',
hooks: {
'astro:config:setup': ({ command, config, injectScript, updateConfig }) => {
if (command === 'build' && analytics) {
injectScript('page', 'import "@astrojs/vercel/analytics"');
}
const outDir = new URL('./static/', getVercelOutput(config.root));
const viteDefine = exposeEnv(['VERCEL_ANALYTICS_ID']);
updateConfig({
outDir,
build: {
format: 'directory',
redirects: false,
},
vite: {
define: viteDefine,
},
...getImageConfig(imageService, imagesConfig, command),
});
},
'astro:config:done': ({ setAdapter, config }) => {
setAdapter(getAdapter());
_config = config;
if (isServerLikeOutput(config)) {
throw new Error(`${PACKAGE_NAME} should be used with output: 'static'`);
}
},
'astro:build:start': async () => {
// Ensure to have `.vercel/output` empty.
// This is because, when building to static, outDir = .vercel/output/static/,
// so .vercel/output itself won't get cleaned.
await emptyDir(getVercelOutput(_config.root));
},
'astro:build:done': async ({ routes }) => {
// Output configuration
// https://vercel.com/docs/build-output-api/v3#build-output-configuration
await writeJson(new URL(`./config.json`, getVercelOutput(_config.root)), {
version: 3,
routes: [
...getRedirects(routes, _config),
{
src: `^/${_config.build.assets}/(.*)$`,
headers: { 'cache-control': 'public, max-age=31536000, immutable' },
continue: true,
},
{ handle: 'filesystem' },
],
...(imageService || imagesConfig
? { images: imagesConfig ? imagesConfig : defaultImageConfig }
: {}),
});
},
},
};
}
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