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import type { AstroAdapter, AstroConfig, AstroIntegration, RouteData } from 'astro';
import type { PathLike } from 'fs';
import fs from 'fs/promises';
import { fileURLToPath } from 'url';
import esbuild from 'esbuild';
const writeJson = (path: PathLike, data: any) =>
fs.writeFile(path, JSON.stringify(data), { encoding: 'utf-8' });
const ENTRYFILE = '__astro_entry';
export function getAdapter(): AstroAdapter {
return {
name: '@astrojs/vercel',
serverEntrypoint: '@astrojs/vercel/server-entrypoint',
exports: ['default'],
};
}
export default function vercel(): AstroIntegration {
let _config: AstroConfig;
let _serverEntry: URL;
return {
name: '@astrojs/vercel',
hooks: {
'astro:config:setup': ({ config }) => {
config.outDir = new URL('./.output/', config.root);
config.build.format = 'directory';
},
'astro:config:done': ({ setAdapter, config }) => {
setAdapter(getAdapter());
_config = config;
_serverEntry = new URL(`./server/pages/${ENTRYFILE}.js`, config.outDir);
},
'astro:build:setup': ({ vite, target }) => {
if (target === 'server') {
vite.build!.rollupOptions = {
input: [],
output: {
format: 'cjs',
file: fileURLToPath(_serverEntry),
dir: undefined,
entryFileNames: undefined,
chunkFileNames: undefined,
assetFileNames: undefined,
inlineDynamicImports: true,
},
};
}
},
'astro:build:start': async ({ buildConfig }) => {
buildConfig.serverEntry = `${ENTRYFILE}.js`;
buildConfig.client = new URL('./static/', _config.outDir);
buildConfig.server = new URL('./server/pages/', _config.outDir);
if (String(process.env.ENABLE_FILE_SYSTEM_API) !== '1') {
console.warn(
`The enviroment variable "ENABLE_FILE_SYSTEM_API" was not found. Make sure you have it set to "1" in your Vercel project.\nLearn how to set enviroment variables here: https://vercel.com/docs/concepts/projects/environment-variables`
);
}
},
'astro:build:done': async ({ routes }) => {
// Bundle dependecies
await esbuild.build({
entryPoints: [fileURLToPath(_serverEntry)],
outfile: fileURLToPath(_serverEntry),
bundle: true,
format: 'cjs',
platform: 'node',
target: 'node14',
allowOverwrite: true,
minifyWhitespace: true,
});
let staticRoutes: RouteData[] = [];
let dynamicRoutes: RouteData[] = [];
for (const route of routes) {
if (route.params.length === 0) staticRoutes.push(route);
else dynamicRoutes.push(route);
}
// Routes Manifest
// https://vercel.com/docs/file-system-api#configuration/routes
await writeJson(new URL(`./routes-manifest.json`, _config.outDir), {
version: 3,
basePath: '/',
pages404: false,
rewrites: staticRoutes.map((route) => ({
source: route.pathname,
regex: route.pattern.toString(),
destination: `/${ENTRYFILE}`,
})),
dynamicRoutes: dynamicRoutes.map((route) => ({
page: `/${ENTRYFILE}`,
regex: route.pattern.toString(),
})),
});
},
},
};
}
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