wip: convert inline config to parser

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

@@ -977,21 +977,25 @@ export interface AstroConfig extends z.output<typeof AstroConfigSchema> {
 	integrations: AstroIntegration[];
 }
 
-export interface ContentEntryType {
+export interface ContentEntryParser {
-	extensions: string[];
+	getEntryInfo(params: { contents: string; fileUrl: URL }): Promise<{
-	getEntryInfo(params: { fileUrl: URL }): Promise<{
 		data: Record<string, unknown>;
+		body: string;
+		slug: string;
 		/**
 		 * Used for error hints to point to correct line and location
 		 * Should be the untouched data as read from the file,
 		 * including newlines
 		 */
 		rawData: string;
-		body: string;
-		slug: string;
 	}>;
 }
 
+export interface ContentEntryType {
+	extensions: string[];
+	parser: string;
+}
+
 export interface AstroSettings {
 	config: AstroConfig;
 	adapter: AstroAdapter | undefined;

packages/astro/src/content/utils.ts

@@ -5,7 +5,7 @@ import path from 'node:path';
 import { fileURLToPath, pathToFileURL } from 'node:url';
 import { ErrorPayload as ViteErrorPayload, normalizePath, ViteDevServer } from 'vite';
 import { z } from 'zod';
-import { AstroConfig, AstroSettings } from '../@types/astro.js';
+import { AstroConfig, AstroSettings, ContentEntryParser } from '../@types/astro.js';
 import { AstroError, AstroErrorData } from '../core/errors/index.js';
 import { appendForwardSlash } from '../core/path.js';
 import { CONTENT_TYPES_FILE, defaultContentEntryExts } from './consts.js';
@@ -244,6 +244,28 @@ export function parseFrontmatter(fileContents: string, filePath: string) {
 	}
 }
 
+// NOTE: Will require dev server restart to debug parser changes
+const contentEntryExtToParserCache = new Map<string, ContentEntryParser>();
+
+export async function loadContentEntryParsers({
+	settings,
+}: {
+	settings: Pick<AstroSettings, 'contentEntryTypes'>;
+}): Promise<Map<string, ContentEntryParser>> {
+	if (contentEntryExtToParserCache.size > 0) return contentEntryExtToParserCache;
+
+	for (const contentEntryType of settings.contentEntryTypes) {
+		for (const extension of contentEntryType.extensions) {
+			// TODO: explore SSR loading strategy if Content Collections processing
+			// is moved from build to SSR
+			const parser = await import(contentEntryType.parser);
+			// TODO: Zod check that parser is a valid parser
+			contentEntryExtToParserCache.set(extension, parser as ContentEntryParser);
+		}
+	}
+	return contentEntryExtToParserCache;
+}
+
 /**
  * The content config is loaded separately from other `src/` files.
  * This global observable lets dependent plugins (like the content flag plugin)

packages/astro/src/content/vite-plugin-content-imports.ts

@@ -1,5 +1,6 @@
 import * as devalue from 'devalue';
 import type fsMod from 'node:fs';
+import { extname } from 'node:path';
 import { pathToFileURL } from 'url';
 import type { Plugin } from 'vite';
 import { AstroSettings } from '../@types/astro.js';
@@ -16,6 +17,7 @@ import {
 	getEntrySlug,
 	getEntryType,
 	globalContentConfigObserver,
+	loadContentEntryParsers,
 	parseFrontmatter,
 } from './utils.js';
 
@@ -65,16 +67,26 @@ export function astroContentImportPlugin({
 						});
 					});
 				}
+
+				const contentEntryParsers = await loadContentEntryParsers({ settings });
 				const rawContents = await fs.promises.readFile(fileId, 'utf-8');
-				const contentEntryType = settings.contentEntryTypes.find((entryType) =>
+				const fileExt = extname(fileId);
-					entryType.extensions.some((ext) => fileId.endsWith(ext))
+				const contentEntryParser = contentEntryParsers.get(fileExt);
-				);
+				// if (!contentEntryParser) {
+				// 	throw new AstroError({
+				// 		...AstroErrorData.UnknownContentCollectionError,
+				// 		message: `No content parser found for file extension "${fileExt}".`,
+				// 	});
+				// }
 				let body: string,
 					unvalidatedData: Record<string, unknown>,
 					unvalidatedSlug: string,
 					rawData: string;
-				if (contentEntryType) {
+				if (contentEntryParser) {
-					const info = await contentEntryType.getEntryInfo({ fileUrl: pathToFileURL(fileId) });
+					const info = await contentEntryParser.getEntryInfo({
+						fileUrl: pathToFileURL(fileId),
+						contents: rawContents,
+					});
 					body = info.body;
 					unvalidatedData = info.data;
 					unvalidatedSlug = info.slug;

packages/integrations/markdoc/components/index.ts

@@ -1 +1,2 @@
+// @ts-ignore
 export { default as Renderer } from './Renderer.astro';

packages/integrations/markdoc/package.json

@@ -20,6 +20,7 @@
   "homepage": "https://docs.astro.build/en/guides/integrations-guide/markdoc/",
   "exports": {
     ".": "./dist/index.js",
+    "./content-type-parser": "./dist/content-type-parser.js",
     "./components": "./components/index.ts",
     "./content-types": "./content-types.d.ts",
     "./package.json": "./package.json"

packages/integrations/markdoc/src/content-type-parser.ts

@@ -1,11 +1,24 @@
 import matter from 'gray-matter';
+import { fileURLToPath } from 'node:url';
 import type { ErrorPayload as ViteErrorPayload } from 'vite';
 
+export default {
+	async getEntryInfo({ contents, fileUrl }: { contents: string; fileUrl: URL }) {
+		const parsed = parseFrontmatter(contents, fileURLToPath(fileUrl));
+		return {
+			data: parsed.data,
+			body: parsed.content,
+			slug: parsed.data.slug,
+			rawData: parsed.matter,
+		};
+	},
+};
+
 /**
  * Match YAML exception handling from Astro core errors
  * @see 'astro/src/core/errors.ts'
  */
-export function parseFrontmatter(fileContents: string, filePath: string) {
+function parseFrontmatter(fileContents: string, filePath: string) {
 	try {
 		// `matter` is empty string on cache results
 		// clear cache to prevent this

packages/integrations/markdoc/src/index.ts

@@ -1,22 +1,10 @@
 import type { AstroIntegration } from 'astro';
 import type { InlineConfig } from 'vite';
 import _Markdoc from '@markdoc/markdoc';
-import fs from 'node:fs';
-import { parseFrontmatter } from './utils.js';
-import { fileURLToPath } from 'node:url';
 
 const contentEntryType = {
 	extensions: ['.mdoc'],
-	async getEntryInfo({ fileUrl }: { fileUrl: URL }) {
+	parser: '@astrojs/markdoc/content-type-parser',
-		const rawContents = await fs.promises.readFile(fileUrl, 'utf-8');
-		const parsed = parseFrontmatter(rawContents, fileURLToPath(fileUrl));
-		return {
-			data: parsed.data,
-			body: parsed.content,
-			slug: parsed.data.slug,
-			rawData: parsed.matter,
-		};
-	},
 };
 
 export default function markdoc(partialOptions: {} = {}): AstroIntegration {
@@ -25,6 +13,7 @@ export default function markdoc(partialOptions: {} = {}): AstroIntegration {
 		hooks: {
 			'astro:config:setup': async ({ updateConfig, config, addContentEntryType, command }: any) => {
 				addContentEntryType(contentEntryType);
+
 				console.log('Markdoc working!');
 				const markdocConfigUrl = new URL('./markdoc.config.ts', config.srcDir);
 

packages/integrations/mdx/src/content-type-parser.ts

@@ -0,0 +1,14 @@
+import { fileURLToPath } from 'node:url';
+import { parseFrontmatter } from './utils.js';
+
+export default {
+	async getEntryInfo({ contents, fileUrl }: { contents: string; fileUrl: URL }) {
+		const parsed = parseFrontmatter(contents, fileURLToPath(fileUrl));
+		return {
+			data: parsed.data,
+			body: parsed.content,
+			slug: parsed.data.slug,
+			rawData: parsed.matter,
+		};
+	},
+};

packages/integrations/mdx/src/index.ts

@@ -25,16 +25,7 @@ export type MdxOptions = Omit<typeof markdownConfigDefaults, 'remarkPlugins' | '
 
 const contentEntryType = {
 	extensions: ['.mdx'],
-	async getEntryInfo({ fileUrl }: { fileUrl: URL }) {
+	parser: '@astrojs/mdx/content-type-parser',
-		const rawContents = await fs.readFile(fileUrl, 'utf-8');
-		const parsed = parseFrontmatter(rawContents, fileURLToPath(fileUrl));
-		return {
-			data: parsed.data,
-			body: parsed.content,
-			slug: parsed.data.slug,
-			rawData: parsed.matter,
-		};
-	},
 };
 
 export default function mdx(partialMdxOptions: Partial<MdxOptions> = {}): AstroIntegration {