fix(vercel): support vercel.json redirects and rewrites

.changeset/few-cycles-trade.md

@@ -0,0 +1,5 @@
+---
+'@astrojs/vercel': minor
+---
+
+Support `vercel.json` redirects and rewrites using Build Output API

packages/integrations/vercel/package.json

@@ -48,6 +48,7 @@
     "@astrojs/webapi": "^2.1.0",
     "@vercel/analytics": "^0.1.8",
     "@vercel/nft": "^0.22.1",
+    "@vercel/routing-utils": "^2.1.10",
     "fast-glob": "^3.2.11",
     "set-cookie-parser": "^2.5.1",
     "web-vitals": "^3.1.1"

packages/integrations/vercel/src/edge/adapter.ts

@@ -11,6 +11,7 @@ import {
 	removeDir,
 	writeJson,
 } from '../lib/fs.js';
+import { getRoutesFromVercelJSON } from '../lib/vercel-config.js';
 import { getRedirects } from '../lib/redirects.js';
 
 const PACKAGE_NAME = '@astrojs/vercel/edge';
@@ -119,11 +120,14 @@ export default function vercelEdge({
 					entrypoint: relativePath(commonAncestor, entryPath),
 				});
 
+				const userRoutes = await getRoutesFromVercelJSON(_config)
+
 				// Output configuration
 				// https://vercel.com/docs/build-output-api/v3#build-output-configuration
 				await writeJson(new URL(`./config.json`, _config.outDir), {
 					version: 3,
 					routes: [
+						...userRoutes,
 						...getRedirects(routes, _config),
 						{ handle: 'filesystem' },
 						{ src: '/.*', dest: 'render' },

packages/integrations/vercel/src/lib/redirects.ts

@@ -1,14 +1,5 @@
 import type { AstroConfig, RouteData, RoutePart } from 'astro';
-
-// https://vercel.com/docs/project-configuration#legacy/routes
-interface VercelRoute {
-	src: string;
-	methods?: string[];
-	dest?: string;
-	headers?: Record<string, string>;
-	status?: number;
-	continue?: boolean;
-}
+import type { Route as VercelRoute } from '@vercel/routing-utils';
 
 // Copied from /home/juanm04/dev/misc/astro/packages/astro/src/core/routing/manifest/create.ts
 // 2022-04-26

packages/integrations/vercel/src/lib/vercel-config.ts

@@ -0,0 +1,16 @@
+import type { AstroConfig } from 'astro';
+import type { Route as VercelRoute } from '@vercel/routing-utils';
+import * as fs from "node:fs/promises";
+import { getTransformedRoutes } from '@vercel/routing-utils';
+
+export async function getRoutesFromVercelJSON(config: AstroConfig): Promise<VercelRoute[]> {
+	let vercelConfig: Record<string, any> | undefined;
+	try {
+		vercelConfig = await fs.readFile(new URL('./vercel.json', config.root), { encoding: 'utf-8' }).then(res => JSON.parse(res));
+	} catch (e) {}
+
+	if (!vercelConfig) return []
+	const { routes } = getTransformedRoutes(vercelConfig);
+	
+	return routes ?? [];
+}

pnpm-lock.yaml

@@ -3599,6 +3599,7 @@ importers:
       '@types/set-cookie-parser': ^2.4.2
       '@vercel/analytics': ^0.1.8
       '@vercel/nft': ^0.22.1
+      '@vercel/routing-utils': ^2.1.10
       astro: workspace:*
       astro-scripts: workspace:*
       chai: ^4.3.6
@@ -3610,6 +3611,7 @@ importers:
       '@astrojs/webapi': link:../../webapi
       '@vercel/analytics': 0.1.8
       '@vercel/nft': 0.22.6
+      '@vercel/routing-utils': 2.1.10
       fast-glob: 3.2.12
       set-cookie-parser: 2.5.1
       web-vitals: 3.1.1
@@ -8090,6 +8092,14 @@ packages:
       - supports-color
     dev: false
 
+  /@vercel/routing-utils/2.1.10:
+    resolution: {integrity: sha512-eOde+TQBcGOpEMd5EVTE36rK5NQOewEepEUCX1jrSgwbf/vzYP5B82zwcGdtddxEwzWqJV4QjltS6H0GZOgf6A==}
+    dependencies:
+      path-to-regexp: 6.1.0
+    optionalDependencies:
+      ajv: 6.12.6
+    dev: false
+
   /@vitejs/plugin-vue-jsx/3.0.0_vite@4.1.2+vue@3.2.47:
     resolution: {integrity: sha512-vurkuzgac5SYuxd2HUZqAFAWGTF10diKBwJNbCvnWijNZfXd+7jMtqjPFbGt7idOJUn584fP1Ar9j/GN2jQ3Ew==}
     engines: {node: ^14.18.0 || >=16.0.0}
@@ -8346,7 +8356,6 @@ packages:
       fast-json-stable-stringify: 2.1.0
       json-schema-traverse: 0.4.1
       uri-js: 4.4.1
-    dev: true
 
   /ajv/8.12.0:
     resolution: {integrity: sha512-sRu1kpcO9yLtYxBKvqfTeh9KzZEwO3STyX1HT+4CaDzC6HpTGYhIhPIzj9XuKU7KYDwnaeh5hcOwjy1QuJzBPA==}
@@ -11778,7 +11787,6 @@ packages:
 
   /json-schema-traverse/0.4.1:
     resolution: {integrity: sha512-xbbCH5dCYU5T8LcEhhuh7HJ88HXuW3qsI3Y0zOZFKfZEHcpWiHU/Jxzk629Brsab/mMiHQti9wMP+845RPe3Vg==}
-    dev: true
 
   /json-schema-traverse/1.0.0:
     resolution: {integrity: sha512-NM8/P9n3XjXhIZn1lLhkFaACTOURQXjWhV4BA/RnOv8xvgqtqpAX9IO4mRQxSx1Rlo4tqzeqb0sOlruaOy3dug==}
@@ -13458,6 +13466,10 @@ packages:
   /path-parse/1.0.7:
     resolution: {integrity: sha512-LDJzPVEEEPR+y48z93A0Ed0yXb8pAByGWo/k5YYdYgpY2/2EsOsksJrq7lOHxryrVOn1ejG6oAp8ahvOIQD8sw==}
 
+  /path-to-regexp/6.1.0:
+    resolution: {integrity: sha512-h9DqehX3zZZDCEm+xbfU0ZmwCGFCAAraPJWMXJ4+v32NjZJilVg3k1TcKsRgIb8IQ/izZSaydDc1OhJCZvs2Dw==}
+    dev: false
+
   /path-to-regexp/6.2.1:
     resolution: {integrity: sha512-JLyh7xT1kizaEvcaXOQwOc2/Yhw6KZOvPf1S8401UyLk86CU79LN3vl7ztXGm/pZ+YjoyAJ4rxmHwbkBXJX+yw==}
 
@@ -15007,6 +15019,7 @@ packages:
   /source-map/0.6.1:
     resolution: {integrity: sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==}
     engines: {node: '>=0.10.0'}
+    requiresBuild: true
 
   /source-map/0.7.4:
     resolution: {integrity: sha512-l3BikUxvPOcn5E74dZiq5BGsTb5yEwhaTSzccU6t4sDOH8NWJCstKO5QT2CvtFoK6F0saL7p9xHAqHOlCPJygA==}