fix: scan getStaticPaths only in .astro files (#7876)

Author: ematipico

.changeset/sour-pants-agree.md

@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Check for `getStaticPaths` only if the file has the `.astro` extension.

packages/astro/src/vite-plugin-scanner/index.ts

@@ -8,12 +8,15 @@ import { warn } from '../core/logger/core.js';
 import { isEndpoint, isPage, rootRelativePath } from '../core/util.js';
 import { getPrerenderDefault, isServerLikeOutput } from '../prerender/utils.js';
 import { scan } from './scan.js';
+import { extname } from 'node:path';
 
 export interface AstroPluginScannerOptions {
 	settings: AstroSettings;
 	logging: LogOptions;
 }
 
+const KNOWN_FILE_EXTENSIONS = ['.astro', '.js', '.ts'];
+
 export default function astroScannerPlugin({
 	settings,
 	logging,
@@ -43,12 +46,13 @@ export default function astroScannerPlugin({
 			if (typeof pageOptions.prerender === 'undefined') {
 				pageOptions.prerender = defaultPrerender;
 			}
-
 			// `getStaticPaths` warning is just a string check, should be good enough for most cases
 			if (
 				!pageOptions.prerender &&
 				isServerLikeOutput(settings.config) &&
-				code.includes('getStaticPaths')
+				code.includes('getStaticPaths') &&
+				// this should only be valid for `.astro`, `.js` and `.ts` files
+				KNOWN_FILE_EXTENSIONS.includes(extname(filename))
 			) {
 				const reason = ` because \`output: "${settings.config.output}"\` is set`;
 				warn(