Update app.py

app.py

@@ -26,6 +26,7 @@ from langchain_community.tools.ddg_search import DuckDuckGoSearchRun
 from langchain_community.utilities.wikipedia import WikipediaAPIWrapper
 from langchain_community.tools import WikipediaQueryRun
 from langchain_experimental.tools import PythonREPLTool # Use with caution
+
 # Custom tools will be defined below (or implicitly used)
 
 # --- Setup Logging ---
@@ -737,22 +738,52 @@ with gr.Blocks() as demo:
 
 # --- App Launch ---
 if __name__ == "__main__":
-    print("\n" + "-"*30 + " App Starting " + "-"*30)
-    # Add Stockfish check here as well for local execution
-    stockfish_path_startup = STOCKFISH_PATH
+    print("\n" + "-"*30 + " App Starting (with explicit checks) " + "-"*30) # Modified print
+
+    # --- Add Explicit Checks Here ---
+    stockfish_path_found = shutil.which("stockfish")
+    ffmpeg_path_found = shutil.which("ffmpeg")
+
+    if stockfish_path_found:
+        print(f"✅ [Path Check] Stockfish found by shutil.which: {stockfish_path_found}")
+    else:
+        # Try common alternative paths if default PATH fails
+        common_paths = ["/usr/games/stockfish", "/usr/bin/stockfish"]
+        found_alt = False
+        for p in common_paths:
+            if os.path.exists(p) and os.access(p, os.X_OK):
+                print(f"⚠️ [Path Check] Stockfish NOT in PATH, but found at: {p}")
+                # Optional: Update STOCKFISH_PATH if found elsewhere
+                # STOCKFISH_PATH = p
+                # print(f"   Attempting to use '{p}' for chess analysis.")
+                found_alt = True
+                break
+        if not found_alt:
+             print(f"❌ [Path Check] Stockfish NOT found by shutil.which in PATH and not in common locations.")
+
+    if ffmpeg_path_found:
+        print(f"✅ [Path Check] ffmpeg found by shutil.which: {ffmpeg_path_found}")
+    else:
+        print(f"❌ [Path Check] ffmpeg NOT found by shutil.which in system PATH.")
+    # --- End Explicit Checks ---
+
+
+    # --- Keep Original Startup Checks for Comparison (Optional but useful) ---
+    print("--- Running original Stockfish version check command ---")
+    stockfish_path_startup = STOCKFISH_PATH # Use the potentially updated path if you uncommented above
     try:
-         # Use subprocess.run correctly
-         p = subprocess.run([stockfish_path_startup, "version"], capture_output=True, text=True, timeout=5, check=False) # Add check=False
+         p = subprocess.run([stockfish_path_startup, "version"], capture_output=True, text=True, timeout=5, check=False)
          if p.returncode == 0 and "Stockfish" in p.stdout:
-              logging.info(f"✅ Stockfish found at '{stockfish_path_startup}' during startup.")
+              logging.info(f"✅ [Subprocess Check] Stockfish version command succeeded using '{stockfish_path_startup}'.")
          else:
-              logging.warning(f"⚠️ Stockfish check command failed or output unexpected at startup: '{stockfish_path_startup} version'. Return code: {p.returncode}. Output: {p.stdout.strip()} / {p.stderr.strip()}")
+              logging.warning(f"⚠️ [Subprocess Check] Stockfish version command failed or output unexpected using '{stockfish_path_startup}'. Return code: {p.returncode}. Output: {p.stdout.strip()} / {p.stderr.strip()}")
     except FileNotFoundError:
-         logging.error(f"❌ Stockfish executable not found at '{stockfish_path_startup}' during startup. Chess analysis will fail.")
+         logging.error(f"❌ [Subprocess Check] Stockfish executable not found at '{stockfish_path_startup}' when running command.")
     except subprocess.TimeoutExpired:
-         logging.warning(f"⚠️ Checking Stockfish version timed out during startup.")
+         logging.warning(f"⚠️ [Subprocess Check] Checking Stockfish version timed out.")
     except Exception as e:
-         logging.warning(f"⚠️ Error checking for Stockfish during startup: {e}")
+         logging.warning(f"⚠️ [Subprocess Check] Error running Stockfish version command: {e}")
+    print("--- End original Stockfish version check command ---")
 
 
     # Check for SPACE_HOST and SPACE_ID at startup for information