Fallback to packaged data files if fetch fails

Resolves #21

changelog.md

@@ -1,7 +1,8 @@
 # Changelog
 
 ## Next
-- Fixed cached data files having formatting issues.
+- Changed fetching of data files to fallback to using the packaged files if the fetch request fails.
+- Fixed packaged data files having formatting issues.
 
 ## 2.5.5
 *2023-06-25*

src/helpers/load-data.ts

@@ -11,7 +11,8 @@ async function loadWebFile(file: string): Promise<string> {
 	if (cachedContent) return cachedContent;
 	// Otherwise cache the request
 	const dataUrl = (file: string): string => `https://raw.githubusercontent.com/github/linguist/HEAD/lib/linguist/${file}`;
-	const fileContent = await fetch(dataUrl(file)).then(data => data.text());
+	// Load file content, falling back to the local file if the request fails
+	const fileContent = await fetch(dataUrl(file)).then(data => data.text()).catch(async () => await loadLocalFile(file));
 	cache.set(file, fileContent);
 	return fileContent;
 }