v0.5.3 — Fix resource swapper, add Husky, remove uuid

Fix three Electron 12→42 protocol migration bugs in the resource swapper:
register protocol on the app session instead of default, generate valid
URLs from Windows paths, and prevent non-swapped krunker.io requests from
being cancelled. Swapper now rescans on page refresh to pick up file changes.

Add Husky pre-commit hook to run ESLint. Remove unused uuid dependency.
Update README with lint script, husky, and swapper improvements.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/main/index.ts

@@ -211,14 +211,14 @@ app.whenReady().then(async () => {
 async function launchApp(): Promise<void> {
   electronLog.log('[KCC] Starting initialization');
 
-  // ── Register swapper file protocol ──
-  registerSwapperFileProtocol();
-
   // ── Session: persistent partition + clean user-agent ──
   const ses = session.fromPartition('persist:krunker');
   const rawUA = ses.getUserAgent();
   ses.setUserAgent(rawUA.replace(/\s*krunker-civilian-client\/\S+/i, ''));
 
+  // ── Register swapper file protocol on this session ──
+  registerSwapperFileProtocol(ses);
+
   // ── Resource swapper ──
   const swapperConfig = config.get('swapper');
   const swapDir = swapperConfig.path || join(app.getPath('userData'), 'Krunker Civilian Client', 'swapper');
@@ -240,16 +240,17 @@ async function launchApp(): Promise<void> {
     : [...BLOCKED_URL_PATTERNS];
 
   ses.webRequest.onBeforeRequest({ urls: requestFilterUrls }, (details, callback) => {
+    // Check swapper first — redirect matching assets to local files
     if (swapper) {
       const redirect = swapper.getRedirect(details.url);
       if (redirect) return callback({ redirectURL: redirect });
     }
-    // If we got here via the broad krunker.io pattern (not an ad), let it through
+    // Determine if this URL is a krunker.io request (matched by the broad swapper pattern)
+    // vs an ad-block pattern. krunker.io requests that weren't swapped pass through normally.
     try {
-      const host = new URL(details.url).hostname;
-      if (host.endsWith('krunker.io')) return callback({});
-    } catch { /* ignore invalid URLs */ }
-    // Otherwise it matched an ad-block pattern — cancel it
+      if (new URL(details.url).hostname.endsWith('krunker.io')) return callback({});
+    } catch { /* invalid URL — fall through to cancel */ }
+    // Matched an ad-block pattern — cancel it
     callback({ cancel: true });
   });
 
@@ -460,6 +461,8 @@ async function launchApp(): Promise<void> {
   // ── Inject scripts after page loads ──
   win.webContents.on('did-finish-load', () => {
     electronLog.log(`[KCC] Page loaded: ${win.webContents.getURL()}`);
+    // Rescan swap directory so new/changed files are picked up on refresh
+    if (swapper) swapper.rescan().catch(() => {});
     Promise.all([
       win.webContents.insertCSS(HIDE_ADS_CSS),
       win.webContents.insertCSS(ALL_CLIENT_CSS),

src/main/swapper.ts

@@ -1,27 +1,53 @@
 import { existsSync, mkdirSync, promises as fsp } from 'fs';
 import { join } from 'path';
-import { protocol, net } from 'electron';
+import { protocol, net, Session } from 'electron';
 
 const PROTOCOL_NAME = 'kpc-swap';
 const TARGET_DOMAIN = 'krunker.io';
 
+/**
+ * Convert a native file path to a proper kpc-swap:// URL.
+ * Windows paths like C:\foo\bar become kpc-swap://C/foo/bar
+ */
+function filePathToSwapURL(filePath: string): string {
+  const forwardSlash = filePath.replace(/\\/g, '/');
+  // Windows drive letter: C:/foo → kpc-swap://C/foo
+  const match = forwardSlash.match(/^([A-Za-z]):\/(.*)/);
+  if (match) {
+    return `${PROTOCOL_NAME}://${match[1]}/${match[2]}`;
+  }
+  // Unix absolute: /home/user/foo → kpc-swap:///home/user/foo
+  return `${PROTOCOL_NAME}://${forwardSlash}`;
+}
+
 /**
  * Register the custom protocol scheme. Must be called BEFORE app.ready.
  */
 export function initSwapperProtocol(): void {
   protocol.registerSchemesAsPrivileged([{
     scheme: PROTOCOL_NAME,
-    privileges: { secure: true, corsEnabled: true, bypassCSP: true },
+    privileges: { standard: true, secure: true, corsEnabled: true, bypassCSP: true },
   }]);
 }
 
 /**
- * Register the file protocol handler. Must be called AFTER app.ready.
+ * Register the file protocol handler on the given session.
+ * Must be called AFTER app.ready.
  */
-export function registerSwapperFileProtocol(): void {
-  protocol.handle(PROTOCOL_NAME, (request) => {
-    const filePath = decodeURI(request.url.replace(`${PROTOCOL_NAME}:`, ''));
-    return net.fetch('file://' + filePath);
+export function registerSwapperFileProtocol(ses: Session): void {
+  ses.protocol.handle(PROTOCOL_NAME, (request) => {
+    const url = new URL(request.url);
+    // Reconstruct the file path from the URL
+    // Windows: kpc-swap://C/foo/bar → C:/foo/bar
+    // Unix:    kpc-swap:///home/foo  → /home/foo
+    let filePath: string;
+    if (url.hostname) {
+      // Windows drive letter is the hostname
+      filePath = `${url.hostname}:${url.pathname}`;
+    } else {
+      filePath = url.pathname;
+    }
+    return net.fetch(`file://${filePath}`);
   });
 }
 
@@ -47,6 +73,13 @@ export class ResourceSwapper {
     this.ready = true;
   }
 
+  /** Rescan the swap directory to pick up added/removed/changed files */
+  async rescan(): Promise<void> {
+    this.swapFiles.clear();
+    await this.scanAsync('');
+    this.ready = true;
+  }
+
   /** URL filter patterns for webRequest.onBeforeRequest — single broad pattern */
   get patterns(): string[] {
     return this.swapFiles.size > 0 ? [`*://*.${TARGET_DOMAIN}/*`] : [];
@@ -70,7 +103,7 @@ export class ResourceSwapper {
       let pathname = queryStart === -1 ? url.substring(pathStart) : url.substring(pathStart, queryStart);
       if (pathname.startsWith('/assets/')) pathname = pathname.substring(7);
       const localPath = this.swapFiles.get(pathname);
-      if (localPath) return `${PROTOCOL_NAME}:/${localPath}`;
+      if (localPath) return filePathToSwapURL(localPath);
     } catch { /* malformed URL — ignore */ }
     return null;
   }