feat(vercel): Use Sharp in dev instead of Squoosh by default (#8445)

* feat(vercel): Use Sharp in dev instead of Squoosh by default

* fix(build):

* nit: adjust with feedback

* fix: imports

* Update packages/integrations/vercel/README.md

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

* docs: small change in other part of the README

---------

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

.changeset/cold-flies-clean.md

@@ -0,0 +1,5 @@
+---
+'@astrojs/vercel': major
+---
+
+Adds a configuration option `devImageService` to choose which of the built-in image services to use in development. Defaults to `sharp`.

packages/integrations/vercel/README.md

@@ -137,7 +137,7 @@ export default defineConfig({
 **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.
+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, the image service specified by [`devImageService`](#devimageservice) will be used instead.
 
 ```js
 // astro.config.mjs
@@ -172,6 +172,30 @@ import astroLogo from '../assets/logo.png';
 />
 ```
 
+### devImageService
+
+**Type:** `'sharp' | 'squoosh' | string`<br>
+**Available for:** Serverless, Static
+**Added in:** `@astrojs/vercel@3.3.0`
+**Default**: 'sharp'
+
+Allows you to configure which image service to use in development when [imageService](#imageservice) is enabled. This can be useful if you cannot install Sharp's dependencies on your development machine, but using another image service like Squoosh would allow you to preview images in your dev environment. Build is unaffected and will always use Vercel's Image Optimization.
+
+It can also be set to any arbitrary value in order to use a custom image service instead of Astro's built-in ones.
+
+```js
+import { defineConfig } from 'astro/config';
+import vercel from '@astrojs/vercel/serverless';
+
+export default defineConfig({
+  output: 'server',
+  adapter: vercel({
+    imageService: true,
+    devImageService: 'squoosh',
+  }),
+});
+```
+
 ### includeFiles
 
 **Type:** `string[]`<br>

packages/integrations/vercel/package.json

@@ -25,6 +25,7 @@
     "./analytics": "./dist/analytics.js",
     "./build-image-service": "./dist/image/build-service.js",
     "./dev-image-service": "./dist/image/dev-service.js",
+    "./squoosh-dev-service": "./dist/image/squoosh-dev-service.js",
     "./package.json": "./package.json"
   },
   "typesVersions": {

packages/integrations/vercel/src/image/build-service.ts

@@ -40,8 +40,9 @@ const service: ExternalImageService = {
 		};
 	},
 	getURL(options) {
-		const fileSrc =
-			typeof options.src === 'string' ? options.src : removeLeadingForwardSlash(options.src.src);
+		const fileSrc = isESMImportedImage(options.src)
+			? removeLeadingForwardSlash(options.src.src)
+			: options.src;
 
 		const searchParams = new URLSearchParams();
 		searchParams.append('url', fileSrc);

packages/integrations/vercel/src/image/dev-service.ts

@@ -1,10 +1,9 @@
 import type { LocalImageService } from 'astro';
-import squooshService from 'astro/assets/services/squoosh';
-import { sharedValidateOptions } from './shared.js';
+import sharpService from 'astro/assets/services/sharp';
+import { baseDevService } from './shared-dev-service.js';
 
 const service: LocalImageService = {
-	validateOptions: (options, serviceOptions) =>
-		sharedValidateOptions(options, serviceOptions.service.config, 'development'),
+	...baseDevService,
 	getHTMLAttributes(options, serviceOptions) {
 		const { inputtedWidth, ...props } = options;
 
@@ -13,45 +12,19 @@ const service: LocalImageService = {
 			props.width = inputtedWidth;
 		}
 
-		return squooshService.getHTMLAttributes
-			? squooshService.getHTMLAttributes(props, serviceOptions)
+		return sharpService.getHTMLAttributes
+			? sharpService.getHTMLAttributes(props, serviceOptions)
 			: {};
 	},
-	getURL(options) {
-		const fileSrc = typeof options.src === 'string' ? options.src : options.src.src;
-
-		const searchParams = new URLSearchParams();
-		searchParams.append('href', fileSrc);
-
-		options.width && searchParams.append('w', options.width.toString());
-		options.quality && searchParams.append('q', options.quality.toString());
-
-		return '/_image?' + searchParams;
-	},
-	parseURL(url) {
-		const params = url.searchParams;
-
-		if (!params.has('href')) {
-			return undefined;
-		}
-
-		const transform = {
-			src: params.get('href')!,
-			width: params.has('w') ? parseInt(params.get('w')!) : undefined,
-			quality: params.get('q'),
-		};
-
-		return transform;
-	},
 	transform(inputBuffer, transform, serviceOptions) {
 		// NOTE: Hardcoding webp here isn't accurate to how the Vercel Image Optimization API works, normally what we should
 		// do is setup a custom endpoint that sniff the user's accept-content header and serve the proper format based on the
 		// user's Vercel config. However, that's: a lot of work for: not much. The dev service is inaccurate to the prod service
 		// in many more ways, this is one of the less offending cases and is, imo, okay, erika - 2023-04-27
-		transform.format = 'webp';
+		transform.format = transform.src.endsWith('svg') ? 'svg' : 'webp';
 
-		// The base Squoosh service works the same way as the Vercel Image Optimization API, so it's a safe fallback in local
-		return squooshService.transform(inputBuffer, transform, serviceOptions);
+		// The base sharp service works the same way as the Vercel Image Optimization API, so it's a safe fallback in local
+		return sharpService.transform(inputBuffer, transform, serviceOptions);
 	},
 };
 

packages/integrations/vercel/src/image/shared-dev-service.ts

@@ -0,0 +1,33 @@
+import type { LocalImageService } from 'astro';
+import { sharedValidateOptions } from './shared.js';
+
+export const baseDevService: Omit<LocalImageService, 'transform'> = {
+	validateOptions: (options, serviceOptions) =>
+		sharedValidateOptions(options, serviceOptions.service.config, 'development'),
+	getURL(options) {
+		const fileSrc = typeof options.src === 'string' ? options.src : options.src.src;
+
+		const searchParams = new URLSearchParams();
+		searchParams.append('href', fileSrc);
+
+		options.width && searchParams.append('w', options.width.toString());
+		options.quality && searchParams.append('q', options.quality.toString());
+
+		return '/_image?' + searchParams;
+	},
+	parseURL(url) {
+		const params = url.searchParams;
+
+		if (!params.has('href')) {
+			return undefined;
+		}
+
+		const transform = {
+			src: params.get('href')!,
+			width: params.has('w') ? parseInt(params.get('w')!) : undefined,
+			quality: params.get('q'),
+		};
+
+		return transform;
+	},
+};

packages/integrations/vercel/src/image/shared.ts

@@ -12,6 +12,10 @@ export function getDefaultImageConfig(astroImageConfig: AstroConfig['image']): V
 export function isESMImportedImage(src: ImageMetadata | string): src is ImageMetadata {
 	return typeof src === 'object';
 }
+
+// eslint-disable-next-line @typescript-eslint/ban-types
+export type DevImageService = 'sharp' | 'squoosh' | (string & {});
+
 // https://vercel.com/docs/build-output-api/v3/configuration#images
 type ImageFormat = 'image/avif' | 'image/webp';
 
@@ -64,16 +68,32 @@ export function getAstroImageConfig(
 	images: boolean | undefined,
 	imagesConfig: VercelImageConfig | undefined,
 	command: string,
+	devImageService: DevImageService,
 	astroImageConfig: AstroConfig['image']
 ) {
+	let devService = '@astrojs/vercel/dev-image-service';
+
+	switch (devImageService) {
+		case 'sharp':
+			devService = '@astrojs/vercel/dev-image-service';
+			break;
+		case 'squoosh':
+			devService = '@astrojs/vercel/squoosh-dev-image-service';
+			break;
+		default:
+			if (typeof devImageService === 'string') {
+				devService = devImageService;
+			} else {
+				devService = '@astrojs/vercel/dev-image-service';
+			}
+			break;
+	}
+
 	if (images) {
 		return {
 			image: {
 				service: {
-					entrypoint:
-						command === 'dev'
-							? '@astrojs/vercel/dev-image-service'
-							: '@astrojs/vercel/build-image-service',
+					entrypoint: command === 'dev' ? devService : '@astrojs/vercel/build-image-service',
 					config: imagesConfig ? imagesConfig : getDefaultImageConfig(astroImageConfig),
 				},
 			},

packages/integrations/vercel/src/image/squoosh-dev-service.ts

@@ -0,0 +1,31 @@
+import type { LocalImageService } from 'astro';
+import squooshService from 'astro/assets/services/squoosh';
+import { baseDevService } from './shared-dev-service.js';
+
+const service: LocalImageService = {
+	...baseDevService,
+	getHTMLAttributes(options, serviceOptions) {
+		const { inputtedWidth, ...props } = options;
+
+		// If `validateOptions` returned a different width than the one of the image, use it for attributes
+		if (inputtedWidth) {
+			props.width = inputtedWidth;
+		}
+
+		return squooshService.getHTMLAttributes
+			? squooshService.getHTMLAttributes(props, serviceOptions)
+			: {};
+	},
+	transform(inputBuffer, transform, serviceOptions) {
+		// NOTE: Hardcoding webp here isn't accurate to how the Vercel Image Optimization API works, normally what we should
+		// do is setup a custom endpoint that sniff the user's accept-content header and serve the proper format based on the
+		// user's Vercel config. However, that's: a lot of work for: not much. The dev service is inaccurate to the prod service
+		// in many more ways, this is one of the less offending cases and is, imo, okay, erika - 2023-04-27
+		transform.format = transform.src.endsWith('svg') ? 'svg' : 'webp';
+
+		// The base squoosh service works the same way as the Vercel Image Optimization API, so it's a safe fallback in local
+		return squooshService.transform(inputBuffer, transform, serviceOptions);
+	},
+};
+
+export default service;

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

@@ -12,6 +12,7 @@ import { fileURLToPath, pathToFileURL } from 'node:url';
 import {
 	getAstroImageConfig,
 	getDefaultImageConfig,
+	type DevImageService,
 	type VercelImageConfig,
 } from '../image/shared.js';
 import { exposeEnv } from '../lib/env.js';
@@ -68,6 +69,7 @@ export interface VercelServerlessConfig {
 	analytics?: boolean;
 	imageService?: boolean;
 	imagesConfig?: VercelImageConfig;
+	devImageService?: DevImageService;
 	edgeMiddleware?: boolean;
 	functionPerRoute?: boolean;
 }
@@ -78,6 +80,7 @@ export default function vercelServerless({
 	analytics,
 	imageService,
 	imagesConfig,
+	devImageService = 'sharp',
 	functionPerRoute = true,
 	edgeMiddleware = false,
 }: VercelServerlessConfig = {}): AstroIntegration {
@@ -147,7 +150,13 @@ export default function vercelServerless({
 							external: ['@vercel/nft'],
 						},
 					},
-					...getAstroImageConfig(imageService, imagesConfig, command, config.image),
+					...getAstroImageConfig(
+						imageService,
+						imagesConfig,
+						command,
+						devImageService,
+						config.image
+					),
 				});
 			},
 			'astro:config:done': ({ setAdapter, config, logger }) => {

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

@@ -3,6 +3,7 @@ import type { AstroAdapter, AstroConfig, AstroIntegration } from 'astro';
 import {
 	getAstroImageConfig,
 	getDefaultImageConfig,
+	type DevImageService,
 	type VercelImageConfig,
 } from '../image/shared.js';
 import { exposeEnv } from '../lib/env.js';
@@ -36,12 +37,14 @@ export interface VercelStaticConfig {
 	analytics?: boolean;
 	imageService?: boolean;
 	imagesConfig?: VercelImageConfig;
+	devImageService?: DevImageService;
 }
 
 export default function vercelStatic({
 	analytics,
 	imageService,
 	imagesConfig,
+	devImageService = 'sharp',
 }: VercelStaticConfig = {}): AstroIntegration {
 	let _config: AstroConfig;
 
@@ -63,7 +66,13 @@ export default function vercelStatic({
 					vite: {
 						define: viteDefine,
 					},
-					...getAstroImageConfig(imageService, imagesConfig, command, config.image),
+					...getAstroImageConfig(
+						imageService,
+						imagesConfig,
+						command,
+						devImageService,
+						config.image
+					),
 				});
 			},
 			'astro:config:done': ({ setAdapter, config }) => {

packages/integrations/vercel/test/fixtures/image/package.json

@@ -2,6 +2,9 @@
   "name": "@test/astro-vercel-image",
   "version": "0.0.0",
   "private": true,
+  "scripts": {
+    "dev": "astro dev"
+  },
   "dependencies": {
     "@astrojs/vercel": "workspace:*",
     "astro": "workspace:*"