fix: Strip the service worker source map before deploy

package.json

@@ -6,7 +6,7 @@
     "homepage": "https://do0ori.github.io/visual-timer",
     "scripts": {
         "dev": "vite",
-        "build": "tsc && vite build",
+        "build": "tsc && vite build && node scripts/strip-sourcemaps.mjs",
         "test": "jest --runInBand",
         "preview": "vite preview",
         "format": "prettier . --write"

scripts/strip-sourcemaps.mjs

@@ -0,0 +1,17 @@
+// Runs after `vite build`, which builds the app and then — in vite-plugin-pwa's
+// own pass, past every plugin hook — the service worker. Source maps only exist
+// so the Sentry plugin can upload them during that build; none may be published
+// to GitHub Pages, so drop whatever is left.
+import { readdirSync, rmSync } from 'node:fs';
+import { join } from 'node:path';
+
+const DIST = 'dist';
+
+const removed = readdirSync(DIST, { recursive: true, encoding: 'utf-8' })
+    .filter((entry) => entry.endsWith('.map'))
+    .map((entry) => {
+        rmSync(join(DIST, entry));
+        return entry;
+    });
+
+console.log(removed.length ? `Stripped source maps: ${removed.join(', ')}` : 'No source maps to strip.');

vite.config.ts

@@ -68,8 +68,8 @@ export default defineConfig({
             }),
     ],
     build: {
-        // Generated only when they can be uploaded to Sentry, and deleted from dist
-        // afterwards, so source maps are never published to GitHub Pages.
+        // Generated only when they can be uploaded to Sentry. `strip-sourcemaps`
+        // clears the leftovers afterwards, so none are published to GitHub Pages.
         sourcemap: uploadSourcemaps ? 'hidden' : false,
     },
     server: {