Add WSL invocation support to zoekt-manager.js for Windows

[Joxx0r]

Problem

On Windows, Zoekt binaries don't compile natively (unix.Umask undefined in index/builder.go). Zoekt must be installed and run inside WSL2. However, zoekt-manager.js currently spawns Zoekt processes directly via child_process.spawn(), which only works with native binaries.

The embark-claude-code installer (v0.5.3+) now:

• Installs Zoekt binaries inside WSL only on Windows
• Generates config.json with zoekt.wsl: true on Windows
• Detects Zoekt via wsl -d Ubuntu -- which zoekt-index

But the service itself can't use those WSL-installed binaries yet.

Proposed Changes

src/service/zoekt-manager.js

1. Constructor — Read config.wsl flag:

   this.wslMode = config.wsl || false;

2. _findBinaries() — When wslMode, detect binaries via WSL:

   if (this.wslMode) {
     try {
       const wslPath = execSync('wsl -d Ubuntu -- which zoekt-index', { encoding: 'utf-8', stdio: ['pipe', 'pipe', 'pipe'] }).trim();
       if (wslPath) {
         this.zoektIndexPath = wslPath;
         this.zoektWebPath = wslPath.replace('zoekt-index', 'zoekt-webserver');
         return true;
       }
     } catch {}
   }

3. _spawn(binaryPath, args) — Wrap invocations through WSL with path conversion:

   _spawn(binaryPath, args) {
     if (this.wslMode) {
       const wslArgs = args.map(a => this._toWslPath(a));
       return spawn('wsl', ['-d', 'Ubuntu', '--', binaryPath, ...wslArgs], {
         stdio: ['ignore', 'pipe', 'pipe']
       });
     }
     return spawn(binaryPath, args, { stdio: ['ignore', 'pipe', 'pipe'] });
   }
   
   _toWslPath(p) {
     // Convert C:\foo\bar → /mnt/c/foo/bar
     const m = p.match(/^([A-Za-z]):[\\/](.*)$/);
     if (m) return `/mnt/${m[1].toLowerCase()}/${m[2].replace(/\/g, '/')}`;
     return p;
   }

4. _killStaleWebservers() — When wslMode, use WSL pkill:

   if (this.wslMode) {
     execSync('wsl -d Ubuntu -- pkill -9 -f zoekt-webserver 2>/dev/null', { stdio: 'ignore', timeout: 5000 });
     return;
   }

Path Conversion (Critical)

The mirror directory, index directory, and project directories are all Windows paths (e.g., C:\Users\...\.claude\repos\unreal-index\data\zoekt-mirror). When passed to Zoekt processes inside WSL, they must be converted to /mnt/c/Users/.../... format. The _toWslPath() helper handles this.

What Doesn't Change

• HTTP health checks (_waitForHealthy) work unchanged — WSL2 port forwarding makes localhost:6070 accessible from Windows
• ZoektClient communicates via HTTP, unaffected
• Non-Windows platforms continue working as before (wslMode defaults to false)

Config Example

The installer generates this on Windows:

{
  "zoekt": {
    "enabled": true,
    "wsl": true,
    "webPort": 6070,
    "indexDir": "./data/zoekt-index",
    "mirrorDir": "./data/zoekt-mirror"
  }
}

[Joxx0r]

Obsolete — the architecture was restructured so the entire service (including Zoekt) runs natively inside WSL as a Linux process. zoekt-manager.js spawns native Linux binaries directly. No cross-boundary WSL invocation is needed.