Merge branch 'bpsaog' of github.com:joaopauloschuler/beyond-python-smolagents into bpsaog

Author: joaopauloschuler

src/smolagents/bp_tools_browser.py

@@ -14,12 +14,46 @@
 prompt_toolkit's asyncio.run() on the main thread.
 """
 
+import os
 import queue
 import threading
 
 from .tools import Tool
 
 
+def _check_chromium_installed():
+    """Check if Chromium browser is installed for Playwright.
+    
+    Returns the path to the Chromium executable if found, None otherwise.
+    """
+    # Get the Playwright cache directory
+    cache_dir = os.path.expanduser("~/.cache/ms-playwright")
+    
+    if not os.path.exists(cache_dir):
+        return None
+    
+    # Look for chromium directories (they start with 'chromium-')
+    try:
+        chromium_dirs = [d for d in os.listdir(cache_dir) if d.startswith('chromium-')]
+        if not chromium_dirs:
+            return None
+        
+        # Check if the chrome executable exists in any of the chromium directories
+        for chromium_dir in chromium_dirs:
+            chrome_path = os.path.join(cache_dir, chromium_dir, 'chrome-linux', 'chrome')
+            if os.path.exists(chrome_path):
+                return chrome_path
+            
+            # Also check for chrome-linux64 (newer versions)
+            chrome_path = os.path.join(cache_dir, chromium_dir, 'chrome-linux64', 'chrome')
+            if os.path.exists(chrome_path):
+                return chrome_path
+        
+        return None
+    except Exception:
+        return None
+
+
 class BrowserManager:
     """Manages a headed Chromium browser in a dedicated thread.
 
@@ -45,6 +79,21 @@ def _ensure_thread(self):
     def _run_loop(self):
         """Background thread: owns Playwright, browser, and page."""
         from playwright.sync_api import sync_playwright
+        
+        # Check if Chromium is installed before trying to launch
+        chromium_path = _check_chromium_installed()
+        if chromium_path is None:
+            error_msg = (
+                "Chromium browser is not installed for Playwright.\n"
+                "Please run the following command to install it:\n"
+                "  playwright install chromium\n"
+                "Or if you're using a virtual environment:\n"
+                "  python -m playwright install chromium"
+            )
+            self._res_q.put((False, RuntimeError(error_msg)))
+            self._ready.set()
+            return
+        
         pw = sync_playwright().start()
         browser = pw.chromium.launch(headless=False, slow_mo=300)
         page = browser.new_page()