Fix server launch on Playwright 1.60

Playwright 1.60 bundled its internals and removed the private
lib/browserServerImpl.js that launchServer.js required, so
`python -m camoufox server` died with MODULE_NOT_FOUND. Load the
driver's package entrypoint instead, which is a bundled playwright-core
and exposes launchServer as public API.

The driver path is now passed explicitly rather than inferred from
process.cwd().

Fixes #656

pythonlib/camoufox/launchServer.js

@@ -1,7 +1,21 @@
-// Workaround that accesses Playwright's undocumented `launchServer` method in Python
-// Without having to use the Node.js Playwright library.
+// Workaround that accesses Playwright's `launchServer` method in Python
+// Without having to install the Node.js Playwright library.
 
-const { BrowserServerLauncherImpl } = require(`${process.cwd()}/lib/browserServerImpl.js`)
+const path = require('path')
+
+// The driver shipped with playwright-python is a copy of playwright-core, so its
+// entrypoint exposes `launchServer`. Resolve through the entrypoint rather than lib/
+// internals, whose layout is private and changes between releases: 1.60 bundled
+// lib/browserServerImpl.js away, which broke this script.
+const driverPackage = process.argv[2]
+
+let playwright
+try {
+    playwright = require(path.join(driverPackage, 'index.js'))
+} catch (error) {
+    console.error(`Error loading the Playwright driver from ${driverPackage}:`, error.message)
+    process.exit(1)
+}
 
 function collectData() {
     return new Promise((resolve) => {
@@ -22,10 +36,7 @@ collectData().then((options) => {
     console.time('Server launched');
     console.info('Launching server...');
     
-    const server = new BrowserServerLauncherImpl('firefox')
-    
-    // Call Playwright's `launchServer` method
-    server.launchServer(options).then(browserServer => {
+    playwright.firefox.launchServer(options).then(browserServer => {
         console.timeEnd('Server launched');
         console.log('Websocket endpoint:\x1b[93m', browserServer.wsEndpoint(), '\x1b[0m');
         // Continue forever

pythonlib/camoufox/server.py

@@ -50,12 +50,16 @@ def launch_server(**kwargs) -> NoReturn:
 
     data = orjson.dumps(to_camel_case_dict(config))
 
+    # The Playwright driver's package directory, which bundles playwright-core.
+    driver_package = Path(nodejs).parent / "package"
+
     process = subprocess.Popen(  # nosec
         [
             nodejs,
             str(LAUNCH_SCRIPT),
+            str(driver_package),
         ],
-        cwd=Path(nodejs).parent / "package",
+        cwd=driver_package,
         stdin=subprocess.PIPE,
         text=True,
     )