Remove the Vercel Edge adapter (#8015)

* Remove the Vercel Edge adapter

* Update tests

* Update .changeset/plenty-keys-add.md

Co-authored-by: Sarah Rainsberger <sarah@rainsberger.ca>

* Show enabling edge middleware

---------

Co-authored-by: Sarah Rainsberger <sarah@rainsberger.ca>

.changeset/plenty-keys-add.md

@@ -0,0 +1,23 @@
+---
+'@astrojs/vercel': major
+---
+
+Remove the Vercel Edge adapter
+
+ `@astrojs/vercel/serverless` now supports Edge middleware, so a separate adapter for Edge itself (deploying your entire app to the edge) is no longer necessary. Please update your Astro config to reflect this change:
+
+ ```diff
+ // astro.config.mjs
+import { defineConfig } from 'astro/config';
+- import vercel from '@astrojs/vercel/edge';
++ import vercel from '@astrojs/vercel/serverless';
+
+export default defineConfig({
+  output: 'server',
+  adapter: vercel({
++    edgeMiddleware: true
+  }),
+});
+```
+
+This adapter had several known limitations and compatibility issues that prevented many people from using it in production. To reduce maintenance costs and because we have a better story with Serveless + Edge Middleware, we are removing the Edge adapter.

packages/integrations/vercel/README.md

@@ -58,16 +58,12 @@ If you prefer to install the adapter manually instead, complete the following tw
 
 You can deploy to different targets:
 
-- `edge`: SSR inside an [Edge function](https://vercel.com/docs/concepts/functions/edge-functions).
 - `serverless`: SSR inside a [Node.js function](https://vercel.com/docs/concepts/functions/serverless-functions).
 - `static`: generates a static website following Vercel's output formats, redirects, etc.
 
-> **Note**: deploying to the Edge has [its limitations](https://vercel.com/docs/concepts/functions/edge-functions#known-limitations). An edge function can't be more than 1 MB in size and they don't support native Node.js APIs, among others.
-
 You can change where to target by changing the import:
 
 ```js
-import vercel from '@astrojs/vercel/edge';
 import vercel from '@astrojs/vercel/serverless';
 import vercel from '@astrojs/vercel/static';
 ```
@@ -90,7 +86,7 @@ To configure this adapter, pass an object to the `vercel()` function call in `as
 ### analytics
 
 **Type:** `boolean`<br>
-**Available for:** Serverless, Edge, Static<br>
+**Available for:** Serverless, Static<br>
 **Added in:** `@astrojs/vercel@3.1.0`
 
 You can enable [Vercel Analytics](https://vercel.com/analytics) (including Web Vitals and Audiences) by setting `analytics: true`. This will inject Vercel’s tracking scripts into all your pages.
@@ -111,7 +107,7 @@ export default defineConfig({
 ### imagesConfig
 
 **Type:** `VercelImageConfig`<br>
-**Available for:** Edge, Serverless, Static
+**Available for:** Serverless, Static
 **Added in:** `@astrojs/vercel@3.3.0`
 
 Configuration options for [Vercel's Image Optimization API](https://vercel.com/docs/concepts/image-optimization). See [Vercel's image configuration documentation](https://vercel.com/docs/build-output-api/v3/configuration#images) for a complete list of supported parameters.
@@ -134,7 +130,7 @@ export default defineConfig({
 ### imageService
 
 **Type:** `boolean`<br>
-**Available for:** Edge, Serverless, Static
+**Available for:** Serverless, Static
 **Added in:** `@astrojs/vercel@3.3.0`
 
 When enabled, an [Image Service](https://docs.astro.build/en/reference/image-service-reference/) powered by the Vercel Image Optimization API will be automatically configured and used in production. In development, a built-in Squoosh-based service will be used instead.
@@ -175,7 +171,7 @@ import astroLogo from '../assets/logo.png';
 ### includeFiles
 
 **Type:** `string[]`<br>
-**Available for:** Edge, Serverless
+**Available for:** Serverless
 
 Use this property to force files to be bundled with your function. This is helpful when you notice missing files.
 
@@ -192,9 +188,6 @@ export default defineConfig({
 });
 ```
 
-> **Note**
-> When building for the Edge, all the dependencies get bundled in a single file to save space. **No extra file will be bundled**. So, if you _need_ some file inside the function, you have to specify it in `includeFiles`.
-
 ### excludeFiles
 
 **Type:** `string[]`<br>

packages/integrations/vercel/test/static-assets.test.js

@@ -66,19 +66,4 @@ describe('Static Assets', () => {
 			checkValidCacheControl(assets);
 		});
 	});
-
-	describe('edge adapter', async () => {
-		const adapter = await import('@astrojs/vercel/edge');
-
-		it('has cache control', async () => {
-			await build({ adapter });
-			checkValidCacheControl();
-		});
-
-		it('has cache control other assets', async () => {
-			const assets = '_foo';
-			await build({ adapter, assets });
-			checkValidCacheControl(assets);
-		});
-	});
 });