fix: better cache, avoid tailwind crashing everything (#1411)

dummdidumm · web-flow · commit b994d1d98748 · 2025-07-10T14:34:08.000+02:00
better cache, avoid tailwind crashing everything
diff --git a/packages/repl/src/lib/workers/bundler/index.ts b/packages/repl/src/lib/workers/bundler/index.ts
@@ -457,7 +457,11 @@ async function get_bundle(
 					if (id === `${VIRTUAL}/${ESM_ENV}`) return;
 					if (id.endsWith('.svelte')) return;
 
-					add_tailwind_candidates(this.parse(code));
+					try {
+						// Don't let a parser/tailwind error crash the bundler
+						// Can happen for files that begin with a bash shebang
+						add_tailwind_candidates(this.parse(code));
+					} catch {}
 				}
 			}
 		],
diff --git a/packages/repl/src/lib/workers/compiler/index.ts b/packages/repl/src/lib/workers/compiler/index.ts
@@ -10,7 +10,7 @@ self.window = self;
 
 declare var self: Window & typeof globalThis & { svelte: typeof import('svelte/compiler') };
 
-const cache: Record<string, any> = {};
+const cache: Record<string, Promise<any>> = {};
 
 addEventListener('message', async (event) => {
 	const { id, file, version, options } = event.data as {
@@ -20,7 +20,11 @@ addEventListener('message', async (event) => {
 		options: ExposedCompilerOptions;
 	};
 
-	const { can_use_experimental_async, svelte } = (cache[version] ??= await load_svelte(version));
+	cache[version] ??= load_svelte(version);
+	cache[version].catch(() => {
+		delete cache[version];
+	});
+	const { can_use_experimental_async, svelte } = await cache[version];
 
 	if (!file.name.endsWith('.svelte') && !svelte.compileModule) {
 		// .svelte.js file compiled with Svelte 3/4 compiler

Original file line number	Diff line number	Diff line change
`@@ -457,7 +457,11 @@ async function get_bundle(`
`457`	`457`	if (id === `${VIRTUAL}/${ESM_ENV}`) return;
`458`	`458`	`if (id.endsWith('.svelte')) return;`
`459`	`459`
`460`		`- add_tailwind_candidates(this.parse(code));`
	`460`	`+ try {`
	`461`	`+ // Don't let a parser/tailwind error crash the bundler`
	`462`	`+ // Can happen for files that begin with a bash shebang`
	`463`	`+ add_tailwind_candidates(this.parse(code));`
	`464`	`+ } catch {}`
`461`	`465`	`}`
`462`	`466`	`}`
`463`	`467`	`],`