Refactor: remove all legacy build logic from codebase (#3141)

* refactor: remove legacy build flag

* refactor: remove legacy style maps

* chore: changeset

* refactor: nuke vite-plugin-build-html

* deps: remove parse5

* tests: restore user provided doctype support!

* deps: remove @web/parse5-utils

* deps: change srcset-parse to dev dep

* chore: remove unused utils

* refactor: remove unused style mapping

* unrelated fix: add .test to astro-markdown-css

* refactor: remove unused astro-style with test update

* chore: remove unused buildTime var

23 files changed, 56 insertions, 1087 deletions

diff --git a/.changeset/three-pigs-hunt.md b/.changeset/three-pigs-hunt.md
new file mode 100644
index 000000000..c72222676
--- /dev/null
+++ b/.changeset/three-pigs-hunt.md
@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Astro internals: remove all legacy build logic from the codebase, now that the legacy build flag has been removed
diff --git a/packages/astro/package.json b/packages/astro/package.json
index 7567193fb..769285d31 100644
--- a/packages/astro/package.json
+++ b/packages/astro/package.json
@@ -86,7 +86,6 @@
     "@babel/traverse": "^7.17.9",
     "@proload/core": "^0.2.2",
     "@proload/plugin-tsm": "^0.1.1",
-    "@web/parse5-utils": "^1.3.0",
     "ast-types": "^0.14.2",
     "boxen": "^6.2.1",
     "ci-info": "^3.3.0",
@@ -109,7 +108,6 @@
     "micromorph": "^0.1.2",
     "mime": "^3.0.0",
     "ora": "^6.1.0",
-    "parse5": "^6.0.1",
     "path-browserify": "^1.0.1",
     "path-to-regexp": "^6.2.0",
     "postcss": "^8.4.12",
@@ -128,7 +126,6 @@
     "sirv": "^2.0.2",
     "slash": "^4.0.0",
     "sourcemap-codec": "^1.4.8",
-    "srcset-parse": "^1.1.0",
     "string-width": "^5.1.2",
     "strip-ansi": "^7.0.1",
     "supports-esm": "^1.0.0",
@@ -163,7 +160,8 @@
     "chai": "^4.3.6",
     "cheerio": "^1.0.0-rc.10",
     "mocha": "^9.2.2",
-    "sass": "^1.50.0"
+    "sass": "^1.50.0",
+    "srcset-parse": "^1.1.0"
   },
   "engines": {
     "node": "^14.15.0 || >=16.0.0",
diff --git a/packages/astro/src/@types/astro.ts b/packages/astro/src/@types/astro.ts
index ffb62a15f..3047ae1b2 100644
--- a/packages/astro/src/@types/astro.ts
+++ b/packages/astro/src/@types/astro.ts
@@ -983,7 +983,6 @@ export interface SSRElement {
 export interface SSRMetadata {
 	renderers: SSRLoadedRenderer[];
 	pathname: string;
-	legacyBuild: boolean;
 }
 
 export interface SSRResult {
diff --git a/packages/astro/src/cli/index.ts b/packages/astro/src/cli/index.ts
index 308ab6a5f..45f50f832 100644
--- a/packages/astro/src/cli/index.ts
+++ b/packages/astro/src/cli/index.ts
@@ -48,7 +48,6 @@ function printAstroHelp() {
 			['--host [optional IP]', 'Expose server on network'],
 			['--config <path>', 'Specify the path to the Astro config file.'],
 			['--root <path>', 'Specify the path to the project root folder.'],
-			['--legacy-build', 'Use the build strategy prior to 0.24.0'],
 			['--drafts', 'Include markdown draft pages in the build.'],
 			['--verbose', 'Enable verbose logging'],
 			['--silent', 'Disable logging'],
diff --git a/packages/astro/src/core/app/index.ts b/packages/astro/src/core/app/index.ts
index c2f5d9a2e..6fb2d61be 100644
--- a/packages/astro/src/core/app/index.ts
+++ b/packages/astro/src/core/app/index.ts
@@ -78,7 +78,6 @@ export class App {
 		const scripts = createModuleScriptElementWithSrcSet(info.scripts, manifest.site);
 
 		const result = await render({
-			legacyBuild: false,
 			links,
 			logging: this.#logging,
 			markdown: manifest.markdown,
diff --git a/packages/astro/src/core/build/generate.ts b/packages/astro/src/core/build/generate.ts
index 17b419bb4..36c25546c 100644
--- a/packages/astro/src/core/build/generate.ts
+++ b/packages/astro/src/core/build/generate.ts
@@ -193,7 +193,6 @@ async function generatePath(
 	const ssr = isBuildingToSSR(opts.astroConfig);
 	const url = new URL(opts.astroConfig.base + removeLeadingForwardSlash(pathname), origin);
 	const options: RenderOptions = {
-		legacyBuild: false,
 		links,
 		logging,
 		markdown: astroConfig.markdown,
diff --git a/packages/astro/src/core/build/index.ts b/packages/astro/src/core/build/index.ts
index 98c8f1e8d..d0c0a026c 100644
--- a/packages/astro/src/core/build/index.ts
+++ b/packages/astro/src/core/build/index.ts
@@ -213,7 +213,6 @@ class AstroBuilder {
 		pageCount: number;
 		buildMode: 'static' | 'ssr';
 	}) {
-		const buildTime = performance.now() - timeStart;
 		const total = getTimeStat(timeStart, performance.now());
 
 		let messages: string[] = [];
diff --git a/packages/astro/src/core/build/internal.ts b/packages/astro/src/core/build/internal.ts
index e51e0e5da..9edde85f3 100644
--- a/packages/astro/src/core/build/internal.ts
+++ b/packages/astro/src/core/build/internal.ts
@@ -30,24 +30,6 @@ export interface BuildInternals {
 	 * A map for page-specific information by a client:only component
 	 */
 	pagesByClientOnly: Map<string, Set<PageBuildData>>;
-
-	/**
-	 * chunkToReferenceIdMap maps them to a hash id used to find the final file.
-	 * @deprecated This Map is only used for the legacy build.
-	 */
-	chunkToReferenceIdMap: Map<string, string>;
-
-	/**
-	 * This is a mapping of pathname to the string source of all collected inline <style> for a page.
-	 * @deprecated This Map is only used for the legacy build.
-	 */
-	astroStyleMap: Map<string, string>;
-
-	/**
-	 * This is a virtual JS module that imports all dependent styles for a page.
-	 * @deprecated This Map is only used for the legacy build.
-	 */
-	astroPageStyleMap: Map<string, string>;
 }
 
 /**
@@ -71,9 +53,6 @@ export function createBuildInternals(): BuildInternals {
 
 	return {
 		pureCSSChunks,
-		chunkToReferenceIdMap,
-		astroStyleMap,
-		astroPageStyleMap,
 		hoistedScriptIdToHoistedMap,
 		entrySpecifierToBundleMap: new Map<string, string>(),
 
diff --git a/packages/astro/src/core/build/static-build.ts b/packages/astro/src/core/build/static-build.ts
index 6eaee4eee..0288f8bc9 100644
--- a/packages/astro/src/core/build/static-build.ts
+++ b/packages/astro/src/core/build/static-build.ts
@@ -151,7 +151,6 @@ async function ssrBuild(opts: StaticBuildOptions, internals: BuildInternals, inp
 			vitePluginPages(opts, internals),
 			rollupPluginAstroBuildCSS({
 				internals,
-				legacy: false,
 				target: 'server',
 			}),
 			...(viteConfig.plugins || []),
@@ -222,7 +221,6 @@ async function clientBuild(
 			vitePluginHoistedScripts(astroConfig, internals),
 			rollupPluginAstroBuildCSS({
 				internals,
-				legacy: false,
 				target: 'client',
 			}),
 			...(viteConfig.plugins || []),
diff --git a/packages/astro/src/core/path.ts b/packages/astro/src/core/path.ts
index 280d5d24f..177723177 100644
--- a/packages/astro/src/core/path.ts
+++ b/packages/astro/src/core/path.ts
@@ -38,11 +38,3 @@ export function startsWithDotSlash(path: string) {
 export function isRelativePath(path: string) {
 	return startsWithDotDotSlash(path) || startsWithDotSlash(path);
 }
-
-export function prependDotSlash(path: string) {
-	if (isRelativePath(path)) {
-		return path;
-	}
-
-	return './' + path;
-}
diff --git a/packages/astro/src/core/render/core.ts b/packages/astro/src/core/render/core.ts
index 59ae6f010..0adac347e 100644
--- a/packages/astro/src/core/render/core.ts
+++ b/packages/astro/src/core/render/core.ts
@@ -66,7 +66,6 @@ export async function getParamsAndProps(
 }
 
 export interface RenderOptions {
-	legacyBuild: boolean;
 	logging: LogOptions;
 	links: Set<SSRElement>;
 	markdown: MarkdownRenderingOptions;
@@ -87,7 +86,6 @@ export async function render(
 	opts: RenderOptions
 ): Promise<{ type: 'html'; html: string } | { type: 'response'; response: Response }> {
 	const {
-		legacyBuild,
 		links,
 		logging,
 		origin,
@@ -128,7 +126,6 @@ export async function render(
 		throw new Error(`Unable to SSR non-Astro component (${route?.component})`);
 
 	const result = createResult({
-		legacyBuild,
 		links,
 		logging,
 		markdown,
diff --git a/packages/astro/src/core/render/dev/index.ts b/packages/astro/src/core/render/dev/index.ts
index 462f8101a..410cb965b 100644
--- a/packages/astro/src/core/render/dev/index.ts
+++ b/packages/astro/src/core/render/dev/index.ts
@@ -102,18 +102,13 @@ export async function render(
 		routeCache,
 		viteServer,
 	} = ssrOpts;
-	// TODO: clean up "legacy" flag passed through helper functions
-	const isLegacyBuild = false;
-
 	// Add hoisted script tags
 	const scripts = createModuleScriptElementWithSrcSet(
-		!isLegacyBuild && mod.hasOwnProperty('$$metadata')
-			? Array.from(mod.$$metadata.hoistedScriptPaths())
-			: []
+		mod.hasOwnProperty('$$metadata') ? Array.from(mod.$$metadata.hoistedScriptPaths()) : []
 	);
 
 	// Inject HMR scripts
-	if (mod.hasOwnProperty('$$metadata') && mode === 'development' && !isLegacyBuild) {
+	if (mod.hasOwnProperty('$$metadata') && mode === 'development') {
 		scripts.add({
 			props: { type: 'module', src: '/@vite/client' },
 			children: '',
@@ -138,29 +133,25 @@ export async function render(
 
 	// Pass framework CSS in as link tags to be appended to the page.
 	let links = new Set<SSRElement>();
-	if (!isLegacyBuild) {
-		[...(await getStylesForURL(filePath, viteServer))].forEach((href) => {
-			if (mode === 'development' && svelteStylesRE.test(href)) {
-				scripts.add({
-					props: { type: 'module', src: href },
-					children: '',
-				});
-			} else {
-				links.add({
-					props: {
-						rel: 'stylesheet',
-						href,
-						'data-astro-injected': true,
-					},
-					children: '',
-				});
-			}
-		});
-	}
+	[...(await getStylesForURL(filePath, viteServer))].forEach((href) => {
+		if (mode === 'development' && svelteStylesRE.test(href)) {
+			scripts.add({
+				props: { type: 'module', src: href },
+				children: '',
+			});
+		} else {
+			links.add({
+				props: {
+					rel: 'stylesheet',
+					href,
+					'data-astro-injected': true,
+				},
+				children: '',
+			});
+		}
+	});
 
 	let content = await coreRender({
-		// TODO: Remove this flag once legacyBuild support is removed
-		legacyBuild: isLegacyBuild,
 		links,
 		logging,
 		markdown: astroConfig.markdown,
@@ -197,41 +188,6 @@ export async function render(
 	// inject tags
 	const tags: vite.HtmlTagDescriptor[] = [];
 
-	// dev only: inject Astro HMR client
-	if (mode === 'development' && isLegacyBuild) {
-		tags.push({
-			tag: 'script',
-			attrs: { type: 'module' },
-			// HACK: inject the direct contents of our `astro/runtime/client/hmr.js` to ensure
-			// `import.meta.hot` is properly handled by Vite
-			children: await getHmrScript(),
-			injectTo: 'head',
-		});
-	}
-
-	// inject CSS
-	if (isLegacyBuild) {
-		[...(await getStylesForURL(filePath, viteServer))].forEach((href) => {
-			if (mode === 'development' && svelteStylesRE.test(href)) {
-				tags.push({
-					tag: 'script',
-					attrs: { type: 'module', src: href },
-					injectTo: 'head',
-				});
-			} else {
-				tags.push({
-					tag: 'link',
-					attrs: {
-						rel: 'stylesheet',
-						href,
-						'data-astro-injected': true,
-					},
-					injectTo: 'head',
-				});
-			}
-		});
-	}
-
 	// add injected tags
 	let html = injectTags(content.html, tags);
 
diff --git a/packages/astro/src/core/render/result.ts b/packages/astro/src/core/render/result.ts
index 8fd856084..3a8a71235 100644
--- a/packages/astro/src/core/render/result.ts
+++ b/packages/astro/src/core/render/result.ts
@@ -22,7 +22,6 @@ function onlyAvailableInSSR(name: string) {
 
 export interface CreateResultArgs {
 	ssr: boolean;
-	legacyBuild: boolean;
 	logging: LogOptions;
 	origin: string;
 	markdown: MarkdownRenderingOptions;
@@ -101,7 +100,7 @@ class Slots {
 let renderMarkdown: any = null;
 
 export function createResult(args: CreateResultArgs): SSRResult {
-	const { legacyBuild, markdown, params, pathname, renderers, request, resolve, site } = args;
+	const { markdown, params, pathname, renderers, request, resolve, site } = args;
 
 	const url = new URL(request.url);
 	const canonicalURL = createCanonicalURL('.' + pathname, site ?? url.origin);
@@ -138,16 +137,15 @@ export function createResult(args: CreateResultArgs): SSRResult {
 					  }
 					: onlyAvailableInSSR('Astro.redirect'),
 				resolve(path: string) {
-					if (!legacyBuild) {
-						let extra = `This can be replaced with a dynamic import like so: await import("${path}")`;
-						if (isCSSRequest(path)) {
-							extra = `It looks like you are resolving styles. If you are adding a link tag, replace with this:
+					let extra = `This can be replaced with a dynamic import like so: await import("${path}")`;
+					if (isCSSRequest(path)) {
+						extra = `It looks like you are resolving styles. If you are adding a link tag, replace with this:
 ---
 import "${path}";
 ---
 `;
-						} else if (isScriptRequest(path)) {
-							extra = `It looks like you are resolving scripts. If you are adding a script tag, replace with this:
+					} else if (isScriptRequest(path)) {
+						extra = `It looks like you are resolving scripts. If you are adding a script tag, replace with this:
 
 <script type="module" src={(await import("${path}?url")).default}></script>
 
@@ -157,21 +155,18 @@ or consider make it a module like so:
 	import MyModule from "${path}";
 </script>
 `;
-						}
-
-						warn(
-							args.logging,
-							`deprecation`,
-							`${bold(
-								'Astro.resolve()'
-							)} is deprecated. We see that you are trying to resolve ${path}.
-${extra}`
-						);
-						// Intentionally return an empty string so that it is not relied upon.
-						return '';
 					}
 
-					return astroGlobal.resolve(path);
+					warn(
+						args.logging,
+						`deprecation`,
+						`${bold(
+							'Astro.resolve()'
+						)} is deprecated. We see that you are trying to resolve ${path}.
+${extra}`
+					);
+					// Intentionally return an empty string so that it is not relied upon.
+					return '';
 				},
 				slots: astroSlots,
 			} as unknown as AstroGlobal;
@@ -206,7 +201,6 @@ ${extra}`
 		_metadata: {
 			renderers,
 			pathname,
-			legacyBuild,
 		},
 	};
 
diff --git a/packages/astro/src/runtime/server/index.ts b/packages/astro/src/runtime/server/index.ts
index 84047025f..72b1d92c0 100644
--- a/packages/astro/src/runtime/server/index.ts
+++ b/packages/astro/src/runtime/server/index.ts
@@ -543,16 +543,7 @@ const uniqueElements = (item: any, index: number, all: any[]) => {
 // Renders a page to completion by first calling the factory callback, waiting for its result, and then appending
 // styles and scripts into the head.
 export async function renderHead(result: SSRResult): Promise<string> {
-	const styles = Array.from(result.styles)
-		.filter(uniqueElements)
-		.map((style) => {
-			// TODO: clean up legacyBuild from metadata
-			const styleChildren = !result._metadata.legacyBuild ? '' : style.children;
-			return renderElement('style', {
-				children: styleChildren,
-				props: { ...style.props, 'astro-style': true },
-			});
-		});
+	const styles = [];
 	let needsHydrationStyles = false;
 	const scripts = Array.from(result.scripts)
 		.filter(uniqueElements)
@@ -568,7 +559,7 @@ export async function renderHead(result: SSRResult): Promise<string> {
 	if (needsHydrationStyles) {
 		styles.push(
 			renderElement('style', {
-				props: { 'astro-style': true },
+				props: {},
 				children: 'astro-root, astro-fragment { display: contents; }',
 			})
 		);
diff --git a/packages/astro/src/vite-plugin-build-css/index.ts b/packages/astro/src/vite-plugin-build-css/index.ts
index 7a856df5d..55771ffb8 100644
--- a/packages/astro/src/vite-plugin-build-css/index.ts
+++ b/packages/astro/src/vite-plugin-build-css/index.ts
@@ -19,27 +19,6 @@ const ASTRO_STYLE_PREFIX = '@astro-inline-style';
 
 const ASTRO_PAGE_STYLE_PREFIX = '@astro-page-all-styles';
 
-export function getAstroPageStyleId(pathname: string) {
-	let styleId = ASTRO_PAGE_STYLE_PREFIX + pathname;
-	if (styleId.endsWith('/')) {
-		styleId += 'index';
-	}
-	styleId += '.js';
-	return styleId;
-}
-
-export function getAstroStyleId(pathname: string) {
-	let styleId = ASTRO_STYLE_PREFIX + pathname;
-	if (styleId.endsWith('/')) {
-		styleId += 'index';
-	}
-	return styleId;
-}
-
-export function getAstroStylePathFromId(id: string) {
-	return id.substr(ASTRO_STYLE_PREFIX.length + 1);
-}
-
 function isStyleVirtualModule(id: string) {
 	return id.startsWith(ASTRO_STYLE_PREFIX);
 }
@@ -54,12 +33,11 @@ function isRawOrUrlModule(id: string) {
 
 interface PluginOptions {
 	internals: BuildInternals;
-	legacy: boolean;
 	target: 'client' | 'server';
 }
 
 export function rollupPluginAstroBuildCSS(options: PluginOptions): VitePlugin {
-	const { internals, legacy } = options;
+	const { internals } = options;
 	const styleSourceMap = new Map<string, string>();
 
 	function* walkStyles(
@@ -153,16 +131,6 @@ export function rollupPluginAstroBuildCSS(options: PluginOptions): VitePlugin {
 			return undefined;
 		},
 
-		async load(id) {
-			if (isPageStyleVirtualModule(id)) {
-				return internals.astroPageStyleMap.get(id) || null;
-			}
-			if (isStyleVirtualModule(id)) {
-				return internals.astroStyleMap.get(id) || null;
-			}
-			return null;
-		},
-
 		async transform(value, id) {
 			if (isStyleVirtualModule(id)) {
 				styleSourceMap.set(id, value);
@@ -203,7 +171,6 @@ export function rollupPluginAstroBuildCSS(options: PluginOptions): VitePlugin {
 				source: minifiedCSS,
 			});
 
-			internals.chunkToReferenceIdMap.set(chunk.fileName, referenceId);
 			if (chunk.type === 'chunk') {
 				const fileName = this.getFileName(referenceId);
 				for (const pageData of getPageDatasByChunk(internals, chunk)) {
@@ -236,26 +203,10 @@ export function rollupPluginAstroBuildCSS(options: PluginOptions): VitePlugin {
 			);
 
 			// Crawl the module graph to find CSS chunks to create
-			if (!legacy) {
-				await addStyles.call(this);
-			}
+			await addStyles.call(this);
 
 			for (const [chunkId, chunk] of Object.entries(bundle)) {
 				if (chunk.type === 'chunk') {
-					// This find shared chunks of CSS and adds them to the main CSS chunks,
-					// so that shared CSS is added to the page.
-					for (const { css: cssSet } of getPageDatasByChunk(internals, chunk)) {
-						for (const imp of chunk.imports) {
-							if (internals.chunkToReferenceIdMap.has(imp) && !pureChunkFilenames.has(imp)) {
-								const referenceId = internals.chunkToReferenceIdMap.get(imp)!;
-								const fileName = this.getFileName(referenceId);
-								if (!cssSet.has(fileName)) {
-									cssSet.add(fileName);
-								}
-							}
-						}
-					}
-
 					// Removes imports for pure CSS chunks.
 					if (hasPureCSSChunks) {
 						if (internals.pureCSSChunks.has(chunk) && !chunk.exports.length) {
diff --git a/packages/astro/src/vite-plugin-build-html/add-rollup-input.ts b/packages/astro/src/vite-plugin-build-html/add-rollup-input.ts
deleted file mode 100644
index 79feb3a7d..000000000
--- a/packages/astro/src/vite-plugin-build-html/add-rollup-input.ts
+++ /dev/null
@@ -1,43 +0,0 @@
-import { InputOptions } from 'rollup';
-
-function fromEntries<V>(entries: [string, V][]) {
-	const obj: Record<string, V> = {};
-	for (const [k, v] of entries) {
-		obj[k] = v;
-	}
-	return obj;
-}
-
-export function addRollupInput(inputOptions: InputOptions, newInputs: string[]): InputOptions {
-	// Add input module ids to existing input option, whether it's a string, array or object
-	// this way you can use multiple html plugins all adding their own inputs
-	if (!inputOptions.input) {
-		return { ...inputOptions, input: newInputs };
-	}
-
-	if (typeof inputOptions.input === 'string') {
-		return {
-			...inputOptions,
-			input: [inputOptions.input, ...newInputs],
-		};
-	}
-
-	if (Array.isArray(inputOptions.input)) {
-		return {
-			...inputOptions,
-			input: [...inputOptions.input, ...newInputs],
-		};
-	}
-
-	if (typeof inputOptions.input === 'object') {
-		return {
-			...inputOptions,
-			input: {
-				...inputOptions.input,
-				...fromEntries(newInputs.map((i) => [i.split('/').slice(-1)[0].split('.')[0], i])),
-			},
-		};
-	}
-
-	throw new Error(`Unknown rollup input type. Supported inputs are string, array and object.`);
-}
diff --git a/packages/astro/src/vite-plugin-build-html/extract-assets.ts b/packages/astro/src/vite-plugin-build-html/extract-assets.ts
deleted file mode 100644
index ffc0446a3..000000000
--- a/packages/astro/src/vite-plugin-build-html/extract-assets.ts
+++ /dev/null
@@ -1,229 +0,0 @@
-import { Document, Element, Node } from 'parse5';
-import npath from 'path';
-import { findElements, getTagName, getAttribute, findNodes, hasAttribute } from '@web/parse5-utils';
-import adapter from 'parse5/lib/tree-adapters/default.js';
-
-const hashedLinkRels = ['stylesheet', 'preload'];
-const linkRels = [...hashedLinkRels, 'icon', 'manifest', 'apple-touch-icon', 'mask-icon'];
-const windowsPathRE = /^[A-Z]:\//;
-
-function getSrcSetUrls(srcset: string) {
-	if (!srcset) {
-		return [];
-	}
-	const srcsetParts = srcset.includes(',') ? srcset.split(',') : [srcset];
-	const urls = srcsetParts
-		.map((url) => url.trim())
-		.map((url) => (url.includes(' ') ? url.split(' ')[0] : url));
-	return urls;
-}
-
-function extractFirstUrlOfSrcSet(node: Element) {
-	const srcset = getAttribute(node, 'srcset');
-	if (!srcset) {
-		return '';
-	}
-	const urls = getSrcSetUrls(srcset);
-	return urls[0];
-}
-
-function isAsset(node: Element) {
-	let path = '';
-	switch (getTagName(node)) {
-		case 'img':
-			path = getAttribute(node, 'src') ?? '';
-			break;
-		case 'source':
-			path = extractFirstUrlOfSrcSet(node) ?? '';
-			break;
-		case 'link':
-			if (linkRels.includes(getAttribute(node, 'rel') ?? '')) {
-				path = getAttribute(node, 'href') ?? '';
-			}
-			break;
-		case 'meta':
-			if (getAttribute(node, 'property') === 'og:image' && getAttribute(node, 'content')) {
-				path = getAttribute(node, 'content') ?? '';
-			}
-			break;
-		case 'script':
-			if (getAttribute(node, 'type') !== 'module' && getAttribute(node, 'src')) {
-				path = getAttribute(node, 'src') ?? '';
-			}
-			break;
-		default:
-			return false;
-	}
-	if (!path) {
-		return false;
-	}
-	// Windows fix: if path starts with C:/, avoid URL parsing
-	if (windowsPathRE.test(path)) {
-		return true;
-	}
-	try {
-		new URL(path);
-		return false;
-	} catch (e) {
-		return true;
-	}
-}
-
-function isInlineScript(node: Element): boolean {
-	switch (getTagName(node)) {
-		case 'script':
-			if (getAttribute(node, 'type') === 'module' && !getAttribute(node, 'src')) {
-				return true;
-			}
-			return false;
-		default:
-			return false;
-	}
-}
-
-function isExternalScript(node: Element): boolean {
-	switch (getTagName(node)) {
-		case 'script':
-			if (hasAttribute(node, 'src')) {
-				return true;
-			}
-			return false;
-		default:
-			return false;
-	}
-}
-
-function isInlineStyle(node: Element): boolean {
-	return getTagName(node) === 'style';
-}
-
-export function isStylesheetLink(node: Element): boolean {
-	return getTagName(node) === 'link' && getAttribute(node, 'rel') === 'stylesheet';
-}
-
-export function isHashedAsset(node: Element) {
-	switch (getTagName(node)) {
-		case 'img':
-			return true;
-		case 'source':
-			return true;
-		case 'script':
-			return true;
-		case 'link':
-			return hashedLinkRels.includes(getAttribute(node, 'rel')!);
-		case 'meta':
-			return true;
-		default:
-			return false;
-	}
-}
-
-export function resolveAssetFilePath(
-	browserPath: string,
-	htmlDir: string,
-	projectRootDir: string,
-	absolutePathPrefix?: string
-) {
-	const _browserPath =
-		absolutePathPrefix && browserPath[0] === '/'
-			? '/' + npath.posix.relative(absolutePathPrefix, browserPath)
-			: browserPath;
-	return npath.join(
-		_browserPath.startsWith('/') ? projectRootDir : htmlDir,
-		_browserPath.split('/').join(npath.sep)
-	);
-}
-
-export function getSourceAttribute(node: Element) {
-	switch (getTagName(node)) {
-		case 'img': {
-			return 'src';
-		}
-		case 'source': {
-			return 'srcset';
-		}
-		case 'link': {
-			return 'href';
-		}
-		case 'script': {
-			return 'src';
-		}
-		case 'meta': {
-			return 'content';
-		}
-		default:
-			throw new Error(`Unknown node with tagname ${getTagName(node)}`);
-	}
-}
-
-export interface Location {
-	start: number;
-	end: number;
-}
-
-export function getSourcePaths(node: Element) {
-	const key = getSourceAttribute(node);
-
-	let location: Location = { start: 0, end: 0 };
-	const src = getAttribute(node, key);
-	if (node.sourceCodeLocation) {
-		let loc = node.sourceCodeLocation.attrs?.[key];
-		if (loc) {
-			location.start = loc.startOffset;
-			location.end = loc.endOffset;
-		}
-	}
-	if (typeof key !== 'string' || src === '') {
-		throw new Error(`Missing attribute ${key} in element ${node.nodeName}`);
-	}
-
-	let paths: { path: string; location: Location }[] = [];
-	if (src && key === 'srcset') {
-		paths = getSrcSetUrls(src).map((path) => ({
-			path,
-			location,
-		}));
-	} else if (src) {
-		paths.push({
-			path: src,
-			location,
-		});
-	}
-
-	return paths;
-}
-
-export function getTextContent(node: Node): string {
-	if (adapter.isCommentNode(node)) {
-		return node.data || '';
-	}
-	if (adapter.isTextNode(node)) {
-		return node.value || '';
-	}
-	const subtree = findNodes(node, (n) => adapter.isTextNode(n));
-	return subtree.map(getTextContent).join('');
-}
-
-export function getAttributes(node: Element): Record<string, any> {
-	return Object.fromEntries(node.attrs.map((attr) => [attr.name, attr.value]));
-}
-
-export function findAssets(document: Document) {
-	return findElements(document, isAsset);
-}
-
-export function findInlineScripts(document: Document) {
-	return findElements(document, isInlineScript);
-}
-
-export function findExternalScripts(document: Document) {
-	return findElements(document, isExternalScript);
-}
-
-export function findInlineStyles(document: Document) {
-	return findElements(document, isInlineStyle);
-}
-
-export function findStyleLinks(document: Document) {
-	return findElements(document, isStylesheetLink);
-}
diff --git a/packages/astro/src/vite-plugin-build-html/index.ts b/packages/astro/src/vite-plugin-build-html/index.ts
deleted file mode 100644
index 34f7b3730..000000000
--- a/packages/astro/src/vite-plugin-build-html/index.ts
+++ /dev/null
@@ -1,537 +0,0 @@
-import {
-	createElement,
-	createScript,
-	getAttribute,
-	hasAttribute,
-	insertBefore,
-	remove,
-	setAttribute,
-} from '@web/parse5-utils';
-import { promises as fs } from 'fs';
-import parse5 from 'parse5';
-import * as npath from 'path';
-import type { OutputChunk, PluginContext, PreRenderedChunk } from 'rollup';
-import srcsetParse from 'srcset-parse';
-import type { Plugin as VitePlugin, ViteDevServer } from 'vite';
-import type { AstroConfig } from '../@types/astro';
-import type { BuildInternals } from '../core/build/internal';
-import type { AllPagesData } from '../core/build/types';
-import type { LogOptions } from '../core/logger/core.js';
-import { prependDotSlash } from '../core/path.js';
-import { render as ssrRender } from '../core/render/dev/index.js';
-import { RouteCache } from '../core/render/route-cache.js';
-import { getOutputFilename } from '../core/util.js';
-import { getAstroPageStyleId, getAstroStyleId } from '../vite-plugin-build-css/index.js';
-import { addRollupInput } from './add-rollup-input.js';
-import {
-	findAssets,
-	findExternalScripts,
-	findInlineScripts,
-	findInlineStyles,
-	getAttributes,
-	getTextContent,
-} from './extract-assets.js';
-import {
-	hasSrcSet,
-	isBuildableImage,
-	isBuildableLink,
-	isHoistedScript,
-	isInSrcDirectory,
-} from './util.js';
-import { createRequest } from '../core/request.js';
-
-// This package isn't real ESM, so have to coerce it
-const matchSrcset: typeof srcsetParse = (srcsetParse as any).default;
-
-const PLUGIN_NAME = '@astro/rollup-plugin-build';
-const ASTRO_PAGE_PREFIX = '@astro-page';
-const ASTRO_SCRIPT_PREFIX = '@astro-script';
-
-const ASTRO_EMPTY = '@astro-empty';
-
-interface PluginOptions {
-	astroConfig: AstroConfig;
-	internals: BuildInternals;
-	logging: LogOptions;
-	allPages: AllPagesData;
-	pageNames: string[];
-	origin: string;
-	routeCache: RouteCache;
-	viteServer: ViteDevServer;
-}
-
-function relativePath(from: string, to: string): string {
-	const rel = npath.posix.relative(from, to);
-	return prependDotSlash(rel);
-}
-
-export function rollupPluginAstroScanHTML(options: PluginOptions): VitePlugin {
-	const { astroConfig, internals, logging, origin, allPages, routeCache, viteServer, pageNames } =
-		options;
-
-	// The filepath root of the src folder
-	const srcRoot = astroConfig.srcDir.pathname;
-	// The web path of the src folter
-	const srcRootWeb = srcRoot.substr(astroConfig.root.pathname.length - 1);
-
-	// A map of pages to rendered HTML
-	const renderedPageMap = new Map<string, string>();
-
-	//
-	const astroScriptMap = new Map<string, string>();
-	const astroPageMap = new Map<string, string>();
-	const astroAssetMap = new Map<string, Promise<Buffer>>();
-
-	const cssChunkMap = new Map<string, string[]>();
-	const pageStyleImportOrder: string[] = [];
-
-	return {
-		name: PLUGIN_NAME,
-
-		enforce: 'pre',
-
-		async options(inputOptions) {
-			const htmlInput: Set<string> = new Set();
-			const assetInput: Set<string> = new Set();
-			const jsInput: Set<string> = new Set();
-
-			for (const [component, pageData] of Object.entries(allPages)) {
-				const [renderers, mod] = pageData.preload;
-
-				// Hydrated components are statically identified.
-				for (const path of mod.$$metadata.hydratedComponentPaths()) {
-					jsInput.add(path);
-				}
-
-				for (const pathname of pageData.paths) {
-					pageNames.push(pathname.replace(/\/?$/, '/').replace(/^\//, ''));
-					const id = ASTRO_PAGE_PREFIX + pathname;
-					const response = await ssrRender(renderers, mod, {
-						astroConfig,
-						filePath: new URL(`./${component}`, astroConfig.root),
-						logging,
-						request: createRequest({
-							url: new URL(origin + pathname),
-							headers: new Headers(),
-							logging,
-							ssr: false,
-						}),
-						mode: 'production',
-						origin,
-						pathname,
-						route: pageData.route,
-						routeCache,
-						viteServer,
-					});
-
-					if (response.type !== 'html') {
-						continue;
-					}
-
-					const html = response.html;
-					renderedPageMap.set(id, html);
-
-					const document = parse5.parse(html, {
-						sourceCodeLocationInfo: true,
-					});
-
-					const frontEndImports = [];
-					for (const script of findInlineScripts(document)) {
-						const astroScript = getAttribute(script, 'astro-script');
-						if (astroScript) {
-							const js = getTextContent(script);
-							const scriptId = ASTRO_SCRIPT_PREFIX + astroScript;
-							frontEndImports.push(scriptId);
-							astroScriptMap.set(scriptId, js);
-						}
-					}
-
-					for (const script of findExternalScripts(document)) {
-						if (isHoistedScript(script)) {
-							const astroScript = getAttribute(script, 'astro-script');
-							const src = getAttribute(script, 'src');
-							if (astroScript) {
-								const js = `import '${src}';`;
-								const scriptId = ASTRO_SCRIPT_PREFIX + astroScript;
-								frontEndImports.push(scriptId);
-								astroScriptMap.set(scriptId, js);
-							}
-						} else if (isInSrcDirectory(script, 'src', srcRoot, srcRootWeb)) {
-							const src = getAttribute(script, 'src');
-							if (src) jsInput.add(src);
-						}
-					}
-
-					const assetImports = [];
-					const styleId = getAstroStyleId(pathname);
-					let styles = 0;
-					for (const node of findInlineStyles(document)) {
-						if (hasAttribute(node, 'astro-style')) {
-							const style = getTextContent(node) || ' '; // If an empty node, add whitespace
-							const thisStyleId = `${styleId}/${++styles}.css`;
-							internals.astroStyleMap.set(thisStyleId, style);
-							assetImports.push(thisStyleId);
-						}
-					}
-
-					for (let node of findAssets(document)) {
-						if (isBuildableLink(node, srcRoot, srcRootWeb)) {
-							const href = getAttribute(node, 'href')!;
-							assetImports.push(href);
-						}
-
-						if (isBuildableImage(node, srcRoot, srcRootWeb)) {
-							const src = getAttribute(node, 'src');
-							if (src?.startsWith(srcRoot) && !astroAssetMap.has(src)) {
-								astroAssetMap.set(src, fs.readFile(new URL(`file://${src}`)));
-							} else if (src?.startsWith(srcRootWeb) && !astroAssetMap.has(src)) {
-								const resolved = new URL('.' + src, astroConfig.root);
-								astroAssetMap.set(src, fs.readFile(resolved));
-							}
-						}
-
-						if (hasSrcSet(node)) {
-							const candidates = matchSrcset(getAttribute(node, 'srcset')!);
-							for (const { url } of candidates) {
-								if (url.startsWith(srcRoot) && !astroAssetMap.has(url)) {
-									astroAssetMap.set(url, fs.readFile(new URL(`file://${url}`)));
-								} else if (url.startsWith(srcRootWeb) && !astroAssetMap.has(url)) {
-									const resolved = new URL('.' + url, astroConfig.root);
-									astroAssetMap.set(url, fs.readFile(resolved));
-								}
-							}
-						}
-					}
-
-					if (frontEndImports.length) {
-						htmlInput.add(id);
-						const jsSource = frontEndImports.map((sid) => `import '${sid}';`).join('\n');
-						astroPageMap.set(id, jsSource);
-					}
-
-					if (assetImports.length) {
-						const pageStyleId = getAstroPageStyleId(pathname);
-						const jsSource = assetImports.map((sid) => `import '${sid}';`).join('\n');
-						internals.astroPageStyleMap.set(pageStyleId, jsSource);
-						assetInput.add(pageStyleId);
-
-						// preserve asset order in the order we encounter them
-						for (const assetHref of assetImports) {
-							if (!pageStyleImportOrder.includes(assetHref)) pageStyleImportOrder.push(assetHref);
-						}
-					}
-				}
-			}
-
-			const allInputs = new Set([...jsInput, ...htmlInput, ...assetInput]);
-			// You always need at least 1 input, so add an placeholder just so we can build HTML/CSS
-			if (!allInputs.size) {
-				allInputs.add(ASTRO_EMPTY);
-			}
-			const outOptions = addRollupInput(inputOptions, Array.from(allInputs));
-			return outOptions;
-		},
-
-		async resolveId(id) {
-			switch (true) {
-				case astroScriptMap.has(id):
-				case astroPageMap.has(id):
-				case id === ASTRO_EMPTY: {
-					return id;
-				}
-			}
-
-			return undefined;
-		},
-
-		async load(id) {
-			// Load pages
-			if (astroPageMap.has(id)) {
-				return astroPageMap.get(id)!;
-			}
-			// Load scripts
-			if (astroScriptMap.has(id)) {
-				return astroScriptMap.get(id)!;
-			}
-			// Give this module actual code so it doesnt warn about an empty chunk
-			if (id === ASTRO_EMPTY) {
-				return 'console.log("empty");';
-			}
-
-			return null;
-		},
-
-		outputOptions(outputOptions) {
-			Object.assign(outputOptions, {
-				entryFileNames(chunk: PreRenderedChunk) {
-					// Removes the `@astro-page` prefix from JS chunk names.
-					if (chunk.name.startsWith(ASTRO_PAGE_PREFIX)) {
-						let pageName = chunk.name.substr(ASTRO_PAGE_PREFIX.length + 1);
-						if (!pageName) {
-							pageName = 'index';
-						}
-						return `assets/${pageName}.[hash].js`;
-					}
-					return 'assets/[name].[hash].js';
-				},
-			});
-			return outputOptions;
-		},
-
-		async generateBundle(this: PluginContext, _options, bundle) {
-			const facadeIdMap = new Map<string, string>();
-			for (const [chunkId, output] of Object.entries(bundle)) {
-				if (output.type === 'chunk') {
-					const chunk = output as OutputChunk;
-					const id = chunk.facadeModuleId;
-					if (id === ASTRO_EMPTY) {
-						delete bundle[chunkId];
-					} else if (id) {
-						facadeIdMap.set(id, chunk.fileName);
-					}
-				}
-			}
-
-			// Emit assets (images, etc)
-			const assetIdMap = new Map<string, string>();
-			for (const [assetPath, dataPromise] of astroAssetMap) {
-				const referenceId = this.emitFile({
-					type: 'asset',
-					name: npath.basename(assetPath),
-					source: await dataPromise,
-				});
-				assetIdMap.set(assetPath, referenceId);
-			}
-
-			// Sort CSS in order of appearance in HTML (pageStyleImportOrder)
-			// This is the “global ordering” used below
-			const sortedCSSChunks = [...internals.pureCSSChunks];
-			sortedCSSChunks.sort((a, b) => {
-				let aIndex = Math.min(
-					...Object.keys(a.modules).map((id) => {
-						const i = pageStyleImportOrder.findIndex((url) => id.endsWith(url));
-						return i >= 0 ? i : Infinity; // if -1 is encountered (unknown order), move to the end (Infinity)
-					})
-				);
-				let bIndex = Math.min(
-					...Object.keys(b.modules).map((id) => {
-						const i = pageStyleImportOrder.findIndex((url) => id.endsWith(url));
-						return i >= 0 ? i : Infinity;
-					})
-				);
-				return aIndex - bIndex;
-			});
-			const sortedChunkNames = sortedCSSChunks.map(({ fileName }) => fileName);
-
-			// Create a mapping of chunks to dependent chunks, used to add the proper
-			// link tags for CSS.
-			for (const chunk of sortedCSSChunks) {
-				const chunkModules = [chunk.fileName, ...chunk.imports];
-				// For each HTML output, sort CSS in HTML order Note: here we actually
-				// want -1 to be first. Since the last CSS “wins”, we want to load
-				// “unknown” (-1) CSS ordering first, followed by “known” ordering at
-				// the end so it takes priority
-				chunkModules.sort((a, b) => sortedChunkNames.indexOf(a) - sortedChunkNames.indexOf(b));
-
-				const referenceIDs: string[] = [];
-				for (const chunkID of chunkModules) {
-					const referenceID = internals.chunkToReferenceIdMap.get(chunkID);
-					if (referenceID) referenceIDs.push(referenceID);
-				}
-				for (const id of Object.keys(chunk.modules)) {
-					cssChunkMap.set(id, referenceIDs);
-				}
-			}
-
-			// Keep track of links added so we don't do so twice.
-			const linkChunksAdded = new Set<string>();
-			const appendStyleChunksBefore = (
-				ref: parse5.Element,
-				pathname: string,
-				referenceIds: string[] | undefined,
-				attrs: Record<string, any> = {}
-			) => {
-				let added = false;
-				if (referenceIds) {
-					const lastNode = ref;
-					for (const referenceId of referenceIds) {
-						const chunkFileName = this.getFileName(referenceId);
-						const relPath = relativePath(pathname, '/' + chunkFileName);
-
-						// This prevents added links more than once per type.
-						const key = pathname + relPath + attrs.rel || 'stylesheet';
-						if (!linkChunksAdded.has(key)) {
-							linkChunksAdded.add(key);
-							insertBefore(
-								lastNode.parentNode,
-								createElement('link', {
-									rel: 'stylesheet',
-									...attrs,
-									href: relPath,
-								}),
-								lastNode
-							);
-							added = true;
-						}
-					}
-				}
-				return added;
-			};
-
-			for (const [id, html] of renderedPageMap) {
-				const pathname = id.substr(ASTRO_PAGE_PREFIX.length);
-				const document = parse5.parse(html, {
-					sourceCodeLocationInfo: true,
-				});
-
-				// This is the module for the page-level bundle which includes
-				// hoisted scripts and hydrated components.
-				const pageAssetId = facadeIdMap.get(id);
-				const bundlePath = '/' + pageAssetId;
-
-				// Update scripts
-				let pageBundleAdded = false;
-
-				// Update inline scripts. These could be hydrated component scripts or hoisted inline scripts
-				for (let script of findInlineScripts(document)) {
-					if (getAttribute(script, 'astro-script') && typeof pageAssetId === 'string') {
-						if (!pageBundleAdded) {
-							pageBundleAdded = true;
-							const relPath = relativePath(pathname, bundlePath);
-							insertBefore(
-								script.parentNode,
-								createScript({
-									type: 'module',
-									src: relPath,
-								}),
-								script
-							);
-						}
-						remove(script);
-					}
-				}
-
-				// Update external scripts. These could be hoisted or in the src folder.
-				for (let script of findExternalScripts(document)) {
-					if (getAttribute(script, 'astro-script') && typeof pageAssetId === 'string') {
-						if (!pageBundleAdded) {
-							pageBundleAdded = true;
-							const relPath = relativePath(pathname, bundlePath);
-							insertBefore(
-								script.parentNode,
-								createScript({
-									type: 'module',
-									src: relPath,
-								}),
-								script
-							);
-						}
-						remove(script);
-					} else if (isInSrcDirectory(script, 'src', srcRoot, srcRootWeb)) {
-						let src = getAttribute(script, 'src');
-						// If this is projectRoot relative, get the fullpath to match the facadeId.
-						if (src?.startsWith(srcRootWeb)) {
-							src = new URL('.' + src, astroConfig.root).pathname;
-						}
-						// On windows the facadeId doesn't start with / but does not Unix :/
-						if (src && (facadeIdMap.has(src) || facadeIdMap.has(src.substr(1)))) {
-							const assetRootPath = '/' + (facadeIdMap.get(src) || facadeIdMap.get(src.substr(1)));
-							const relPath = relativePath(pathname, assetRootPath);
-							const attrs = getAttributes(script);
-							insertBefore(
-								script.parentNode,
-								createScript({
-									...attrs,
-									src: relPath,
-								}),
-								script
-							);
-							remove(script);
-						}
-					}
-				}
-
-				const styleId = getAstroPageStyleId(pathname);
-				let pageCSSAdded = false;
-				for (const node of findAssets(document)) {
-					if (isBuildableLink(node, srcRoot, srcRootWeb)) {
-						const rel = getAttribute(node, 'rel');
-						switch (rel) {
-							case 'stylesheet': {
-								if (!pageCSSAdded) {
-									const attrs = getAttributes(node);
-									delete attrs['data-astro-injected'];
-									pageCSSAdded = appendStyleChunksBefore(
-										node,
-										pathname,
-										cssChunkMap.get(styleId),
-										attrs
-									);
-								}
-								remove(node);
-								break;
-							}
-							case 'preload': {
-								if (getAttribute(node, 'as') === 'style') {
-									const attrs = getAttributes(node);
-									appendStyleChunksBefore(node, pathname, cssChunkMap.get(styleId), attrs);
-									remove(node);
-								}
-							}
-						}
-					}
-
-					if (isBuildableImage(node, srcRoot, srcRootWeb)) {
-						const src = getAttribute(node, 'src')!;
-						const referenceId = assetIdMap.get(src);
-						if (referenceId) {
-							const fileName = this.getFileName(referenceId);
-							const relPath = relativePath(pathname, '/' + fileName);
-							setAttribute(node, 'src', relPath);
-						}
-					}
-
-					// Could be a `source` or an `img`.
-					if (hasSrcSet(node)) {
-						const srcset = getAttribute(node, 'srcset')!;
-						let changedSrcset = srcset;
-						const urls = matchSrcset(srcset).map((c) => c.url);
-						for (const url of urls) {
-							if (assetIdMap.has(url)) {
-								const referenceId = assetIdMap.get(url)!;
-								const fileName = this.getFileName(referenceId);
-								const relPath = relativePath(pathname, '/' + fileName);
-								changedSrcset = changedSrcset.replace(url, relPath);
-							}
-						}
-						// If anything changed, update it
-						if (changedSrcset !== srcset) {
-							setAttribute(node, 'srcset', changedSrcset);
-						}
-					}
-				}
-
-				// Page styles for <style> usage, if not already appended via links.
-				for (const style of findInlineStyles(document)) {
-					if (hasAttribute(style, 'astro-style')) {
-						if (!pageCSSAdded) {
-							pageCSSAdded = appendStyleChunksBefore(style, pathname, cssChunkMap.get(styleId));
-						}
-
-						remove(style);
-					}
-				}
-
-				const outHTML = parse5.serialize(document);
-				const name = pathname.substr(1);
-				const outPath = getOutputFilename(astroConfig, name);
-
-				this.emitFile({
-					fileName: outPath,
-					source: outHTML,
-					type: 'asset',
-				});
-			}
-		},
-	};
-}
diff --git a/packages/astro/src/vite-plugin-build-html/util.ts b/packages/astro/src/vite-plugin-build-html/util.ts
deleted file mode 100644
index 8380b55fd..000000000
--- a/packages/astro/src/vite-plugin-build-html/util.ts
+++ /dev/null
@@ -1,64 +0,0 @@
-import { getAttribute, hasAttribute, getTagName } from '@web/parse5-utils';
-import parse5 from 'parse5';
-import { isStylesheetLink } from './extract-assets.js';
-
-const tagsWithSrcSet = new Set(['img', 'source']);
-
-function startsWithSrcRoot(pathname: string, srcRoot: string, srcRootWeb: string): boolean {
-	return (
-		pathname.startsWith(srcRoot) || // /Users/user/project/src/styles/main.css
-		pathname.startsWith(srcRootWeb) || // /src/styles/main.css
-		`/${pathname}`.startsWith(srcRoot)
-	); // Windows fix: some paths are missing leading "/"
-}
-
-export function isInSrcDirectory(
-	node: parse5.Element,
-	attr: string,
-	srcRoot: string,
-	srcRootWeb: string
-): boolean {
-	const value = getAttribute(node, attr);
-	return value ? startsWithSrcRoot(value, srcRoot, srcRootWeb) : false;
-}
-
-export function isAstroInjectedLink(node: parse5.Element): boolean {
-	return isStylesheetLink(node) && getAttribute(node, 'data-astro-injected') === '';
-}
-
-export function isBuildableLink(
-	node: parse5.Element,
-	srcRoot: string,
-	srcRootWeb: string
-): boolean {
-	if (isAstroInjectedLink(node)) {
-		return true;
-	}
-
-	const href = getAttribute(node, 'href');
-	if (typeof href !== 'string' || !href.length) {
-		return false;
-	}
-
-	return startsWithSrcRoot(href, srcRoot, srcRootWeb);
-}
-
-export function isBuildableImage(
-	node: parse5.Element,
-	srcRoot: string,
-	srcRootWeb: string
-): boolean {
-	if (getTagName(node) === 'img') {
-		const src = getAttribute(node, 'src');
-		return src ? startsWithSrcRoot(src, srcRoot, srcRootWeb) : false;
-	}
-	return false;
-}
-
-export function hasSrcSet(node: parse5.Element): boolean {
-	return tagsWithSrcSet.has(getTagName(node)) && !!getAttribute(node, 'srcset');
-}
-
-export function isHoistedScript(node: parse5.Element): boolean {
-	return getTagName(node) === 'script' && hasAttribute(node, 'hoist');
-}
diff --git a/packages/astro/test/0-css.test.js b/packages/astro/test/0-css.test.js
index 423975c97..e53df8408 100644
--- a/packages/astro/test/0-css.test.js
+++ b/packages/astro/test/0-css.test.js
@@ -291,8 +291,8 @@ describe('CSS', function () {
 		});
 
 		it('resolves Astro styles', async () => {
-			const style = $('style[astro-style]');
-			expect(style.length).to.not.equal(0);
+			const astroPageCss = $('link[rel=stylesheet][href^=/src/pages/index.astro?astro&type=style]');
+			expect(astroPageCss.length).to.equal(4, 'The index.astro page should generate 4 stylesheets, 1 for each <style> tag on the page.')
 		});
 
 		it('resolves Styles from React', async () => {
diff --git a/packages/astro/test/astro-doctype.test.js b/packages/astro/test/astro-doctype.test.js
index cb9a0c63c..8387fd0a7 100644
--- a/packages/astro/test/astro-doctype.test.js
+++ b/packages/astro/test/astro-doctype.test.js
@@ -24,14 +24,12 @@ describe('Doctype', () => {
 		expect(html).to.match(/^<!DOCTYPE html>/i);
 	});
 
-	// Note: parse5 converts this to <!DOCTYPE html> (HTML5). Uncomment if we want to support legacy doctypes.
-	//
-	// it('Preserves user provided doctype', async () => {
-	//   const html = await fixture.readFile('/preserve/index.html');
-
-	//   // test that Doctype included was preserved
-	//   expect(html).to.match(new RegExp('^<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">', 'i'));
-	// });
+	it('Preserves user provided doctype', async () => {
+	  const html = await fixture.readFile('/preserve/index.html');
+
+	  // test that Doctype included was preserved
+	  expect(html).to.match(new RegExp('^<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">', 'i'));
+	});
 
 	it('User provided doctype is case insensitive', async () => {
 		const html = await fixture.readFile('/capital/index.html');
diff --git a/packages/astro/test/astro-markdown-css.js b/packages/astro/test/astro-markdown-css.test.js
index 04e274633..04e274633 100644
--- a/packages/astro/test/astro-markdown-css.js
+++ b/packages/astro/test/astro-markdown-css.test.js
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index c89916cb7..16757c937 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -479,7 +479,6 @@ importers:
       '@types/send': ^0.17.1
       '@types/unist': ^2.0.6
       '@types/yargs-parser': ^21.0.0
-      '@web/parse5-utils': ^1.3.0
       ast-types: ^0.14.2
       astro-scripts: workspace:*
       boxen: ^6.2.1
@@ -506,7 +505,6 @@ importers:
       mime: ^3.0.0
       mocha: ^9.2.2
       ora: ^6.1.0
-      parse5: ^6.0.1
       path-browserify: ^1.0.1
       path-to-regexp: ^6.2.0
       postcss: ^8.4.12
@@ -546,7 +544,6 @@ importers:
       '@babel/traverse': 7.17.9
       '@proload/core': 0.2.2
       '@proload/plugin-tsm': 0.1.1_@proload+core@0.2.2
-      '@web/parse5-utils': 1.3.0
       ast-types: 0.14.2
       boxen: 6.2.1
       ci-info: 3.3.0
@@ -569,7 +566,6 @@ importers:
       micromorph: 0.1.2
       mime: 3.0.0
       ora: 6.1.0
-      parse5: 6.0.1
       path-browserify: 1.0.1
       path-to-regexp: 6.2.0
       postcss: 8.4.12
@@ -588,7 +584,6 @@ importers:
       sirv: 2.0.2
       slash: 4.0.0
       sourcemap-codec: 1.4.8
-      srcset-parse: 1.1.0
       string-width: 5.1.2
       strip-ansi: 7.0.1
       supports-esm: 1.0.0
@@ -623,6 +618,7 @@ importers:
       cheerio: 1.0.0-rc.10
       mocha: 9.2.2
       sass: 1.50.0
+      srcset-parse: 1.1.0
 
   packages/astro-prism:
     specifiers:
@@ -4488,14 +4484,6 @@ packages:
   /@vue/shared/3.2.31:
     resolution: {integrity: sha512-ymN2pj6zEjiKJZbrf98UM2pfDd6F2H7ksKw7NDt/ZZ1fh5Ei39X5tABugtT03ZRlWd9imccoK0hE8hpjpU7irQ==}
 
-  /@web/parse5-utils/1.3.0:
-    resolution: {integrity: sha512-Pgkx3ECc8EgXSlS5EyrgzSOoUbM6P8OKS471HLAyvOBcP1NCBn0to4RN/OaKASGq8qa3j+lPX9H14uA5AHEnQg==}
-    engines: {node: '>=10.0.0'}
-    dependencies:
-      '@types/parse5': 6.0.3
-      parse5: 6.0.1
-    dev: false
-
   /@webcomponents/template-shadowroot/0.1.0:
     resolution: {integrity: sha512-ry84Vft6xtRBbd4M/ptRodbOLodV5AD15TYhyRghCRgIcJJKmYmJ2v2BaaWxygENwh6Uq3zTfGPmlckKT/GXsQ==}
     dev: false
@@ -9497,7 +9485,7 @@ packages:
 
   /srcset-parse/1.1.0:
     resolution: {integrity: sha512-JWp4cG2eybkvKA1QUHGoNK6JDEYcOnSuhzNGjZuYUPqXreDl/VkkvP2sZW7Rmh+icuCttrR9ccb2WPIazyM/Cw==}
-    dev: false
+    dev: true
 
   /statuses/2.0.1:
     resolution: {integrity: sha512-RwNA9Z/7PrK06rYLIzFMlaF+l73iwpzsqRIFgbMLbTcLD6cOao82TaWefPXQvB2fOC4AjuYSEndS7N/mTCbkdQ==}