From 3bb190b53dd89a4951f51faa9411dc77217d7f1b Mon Sep 17 00:00:00 2001
From: JuanM04 <me@juanm04.com>
Date: Mon, 28 Mar 2022 15:13:14 -0300
Subject: [PATCH] Build API Routes

---
 packages/integrations/vercel/package.json |  5 ++--
 packages/integrations/vercel/src/index.ts | 29 +++++++++++++++++++----
 2 files changed, 28 insertions(+), 6 deletions(-)

diff --git a/packages/integrations/vercel/package.json b/packages/integrations/vercel/package.json
index 31a07bc037..e93639b60d 100644
--- a/packages/integrations/vercel/package.json
+++ b/packages/integrations/vercel/package.json
@@ -23,8 +23,9 @@
   },
   "dependencies": {
     "@astrojs/webapi": "^0.11.0",
-    "@vercel/nft": "^0.18.0",
-    "@vercel/node": "^1.14.0"
+    "@vercel/node": "^1.14.0",
+    "esbuild": "0.14.25",
+    "globby": "^12.2.0"
   },
   "devDependencies": {
     "astro": "workspace:*",
diff --git a/packages/integrations/vercel/src/index.ts b/packages/integrations/vercel/src/index.ts
index ab35b9e554..c89435ece3 100644
--- a/packages/integrations/vercel/src/index.ts
+++ b/packages/integrations/vercel/src/index.ts
@@ -1,30 +1,37 @@
 import type { AstroIntegration, AstroConfig } from 'astro';
 import fs from 'fs/promises';
 import type { PathLike } from 'fs';
+import { fileURLToPath } from 'url';
+import { globby } from 'globby';
+import esbuild from 'esbuild';
 
 export type { VercelApiHandler, VercelRequest, VercelRequestBody, VercelRequestCookies, VercelRequestQuery, VercelResponse } from '@vercel/node';
 
 const writeJson = (path: PathLike, data: any) => fs.writeFile(path, JSON.stringify(data), { encoding: 'utf-8' });
 
+const ENDPOINT_GLOB = 'api/**/*.{js,ts,tsx}';
+
 export function vercelFunctions(): AstroIntegration {
 	let _config: AstroConfig;
 	let output: URL;
+
 	return {
 		name: '@astrojs/vercel',
 		hooks: {
-			'astro:config:setup': ({ config }) => {
+			'astro:config:setup': ({ config, ignorePages }) => {
 				output = new URL('./.output/', config.projectRoot);
 				config.dist = new URL('./static/', output);
 				config.buildOptions.pageUrlFormat = 'directory';
+				ignorePages(ENDPOINT_GLOB);
 			},
-			'astro:config:done': async ({ config, setAdapter }) => {
-				// setAdapter(getAdapter(config.buildOptions.site));
+			'astro:config:done': async ({ config }) => {
 				_config = config;
 			},
 			'astro:build:start': async () => {
-				await fs.rm(output, { recursive: true });
+				await fs.rm(output, { recursive: true, force: true });
 			},
 			'astro:build:done': async ({ pages }) => {
+				// Split pages from the rest of files
 				await Promise.all(
 					pages.map(async ({ pathname }) => {
 						const origin = new URL(`./static/${pathname}index.html`, output);
@@ -43,6 +50,20 @@ export function vercelFunctions(): AstroIntegration {
 					basePath: '/',
 					pages404: false,
 				});
+
+				const endpoints = await globby([ENDPOINT_GLOB, '!_*'], { onlyFiles: true, cwd: _config.pages });
+
+				if (endpoints.length === 0) return;
+
+				await esbuild.build({
+					entryPoints: endpoints.map((endpoint) => new URL(endpoint, _config.pages)).map(fileURLToPath),
+					outdir: fileURLToPath(new URL('./server/pages/api/', output)),
+					outbase: fileURLToPath(new URL('./api/', _config.pages)),
+					bundle: true,
+					target: 'node14',
+					platform: 'node',
+					format: 'cjs',
+				});
 			},
 		},
 	};