Limit imports in flight for getCollection (withastro#10708)

.changeset/four-zoos-taste.md

@@ -0,0 +1,5 @@
+---
+"astro": patch
+---
+
+Limits parallel imports within `getCollection()` to prevent EMFILE errors when accessing files

packages/astro/src/content/runtime.ts

@@ -1,4 +1,5 @@
 import type { MarkdownHeading } from '@astrojs/markdown-remark';
+import pLimit from 'p-limit';
 import { ZodIssueCode, string as zodString } from 'zod';
 import { AstroError, AstroErrorData } from '../core/errors/index.js';
 import { prependForwardSlash } from '../core/path.js';
@@ -80,8 +81,9 @@ export function createGetCollection({
 			// Always return a new instance so consumers can safely mutate it
 			entries = [...cacheEntriesByCollection.get(collection)!];
 		} else {
+			const limit = pLimit(10);
 			entries = await Promise.all(
-				lazyImports.map(async (lazyImport) => {
+				lazyImports.map((lazyImport) => limit(async () => {
 					const entry = await lazyImport();
 					return type === 'content'
 						? {
@@ -103,7 +105,7 @@ export function createGetCollection({
 								collection: entry.collection,
 								data: entry.data,
 							};
-				})
+				}))
 			);
 			cacheEntriesByCollection.set(collection, entries);
 		}