Add ability to remove assets originals

Related to #8143

Setting `assetsRemoveOriginals: true` will remove original images from `dist/_astro` folder

.changeset/thirty-geckos-bathe.md

@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Add ability to remove assets originals

packages/astro/src/@types/astro.ts

@@ -791,6 +791,24 @@ export interface AstroUserConfig {
 		 * ```
 		 */
 		assetsPrefix?: string;
+		/**
+		 * @docs
+		 * @name build.assetsRemoveOriginals
+		 * @type {boolean}
+		 * @default `false`
+		 * @version 3.0.6
+		 * @description
+		 * Specifies necessity for removing assets originals.
+		 *
+		 * ```js
+		 * {
+		 *   build: {
+		 *     assetsRemoveOriginals: true
+		 *   }
+		 * }
+		 * ```
+		 */
+		assetsRemoveOriginals?: boolean;
 		/**
 		 * @docs
 		 * @name build.serverEntry

packages/astro/src/assets/build/generate.ts

@@ -57,6 +57,23 @@ export async function generateImage(
 	const finalFileURL = new URL('.' + filepath, clientRoot);
 	const finalFolderURL = new URL('./', finalFileURL);
 
+	// The original filepath or URL from the image transform
+	const originalImagePath = isLocalImage
+		? (options.src as ImageMetadata).src
+		: (options.src as string);
+
+	if (config.build.assetsRemoveOriginals) {
+		const originalFileURL = new URL('.' + originalImagePath, clientRoot);
+		try {
+			await fs.promises.unlink(originalFileURL);
+		} catch (e) {
+			logger.warn(
+				'astro:assets',
+				`An error was encountered while removing asset original. Error: ${e}`
+			);
+		}
+	}
+
 	// For remote images, instead of saving the image directly, we save a JSON file with the image data and expiration date from the server
 	const cacheFile = basename(filepath) + (isLocalImage ? '' : '.json');
 	const cachedFileURL = new URL(cacheFile, assetsCacheDir);
@@ -90,11 +107,6 @@ export async function generateImage(
 		// If the cache file doesn't exist, just move on, and we'll generate it
 	}
 
-	// The original filepath or URL from the image transform
-	const originalImagePath = isLocalImage
-		? (options.src as ImageMetadata).src
-		: (options.src as string);
-
 	let imageData;
 	let resultData: { data: Buffer | undefined; expires: number | undefined } = {
 		data: undefined,

packages/astro/src/core/config/schema.ts

@@ -23,6 +23,7 @@ const ASTRO_CONFIG_DEFAULTS = {
 		client: './dist/client/',
 		server: './dist/server/',
 		assets: '_astro',
+		assetsRemoveOriginals: false,
 		serverEntry: 'entry.mjs',
 		redirects: true,
 		inlineStylesheets: 'auto',
@@ -119,6 +120,7 @@ export const AstroConfigSchema = z.object({
 				.transform((val) => new URL(val)),
 			assets: z.string().optional().default(ASTRO_CONFIG_DEFAULTS.build.assets),
 			assetsPrefix: z.string().optional(),
+			assetsRemoveOriginals: z.boolean().default(ASTRO_CONFIG_DEFAULTS.build.assetsRemoveOriginals),
 			serverEntry: z.string().optional().default(ASTRO_CONFIG_DEFAULTS.build.serverEntry),
 			redirects: z.boolean().optional().default(ASTRO_CONFIG_DEFAULTS.build.redirects),
 			inlineStylesheets: z
@@ -341,6 +343,7 @@ export function createRelativeSchema(cmd: string, fileProtocolRoot: string) {
 					.transform((val) => resolveDirAsUrl(val, fileProtocolRoot)),
 				assets: z.string().optional().default(ASTRO_CONFIG_DEFAULTS.build.assets),
 				assetsPrefix: z.string().optional(),
+			assetsRemoveOriginals: z.boolean().default(ASTRO_CONFIG_DEFAULTS.build.assetsRemoveOriginals),
 				serverEntry: z.string().optional().default(ASTRO_CONFIG_DEFAULTS.build.serverEntry),
 				redirects: z.boolean().optional().default(ASTRO_CONFIG_DEFAULTS.build.redirects),
 				inlineStylesheets: z