Feat: Enhance RepoMix error logging in app.py

app.py

@@ -53,11 +53,12 @@ def run_repomix(repo_url_or_id, progress=gr.Progress(track_tqdm=True)):
                 "--compress" 
             ]
             
-            process = subprocess.run(cmd, capture_output=True, text=True, check=False)
+            process = subprocess.run(cmd, capture_output=True, text=True, check=False, encoding='utf-8') # Added encoding
             progress(0.8, desc="Repomix command executed.")
 
             if process.returncode != 0:
-                return f"Error running Repomix: {process.stderr}", None
+                error_details = f"Return Code: {process.returncode}\nStderr: {process.stderr}\nStdout: {process.stdout}"
+                return f"Error running Repomix:\n{error_details}", None
             
             if os.path.exists(output_file_path):
                 with open(output_file_path, 'r', encoding='utf-8') as f:
@@ -65,7 +66,8 @@ def run_repomix(repo_url_or_id, progress=gr.Progress(track_tqdm=True)):
                 progress(1, desc="Repomix output processed.")
                 return content, output_file_path # Return content and path for potential download
             else:
-                return "Error: Repomix did not generate an output file.", None
+                error_details = f"Return Code: {process.returncode}\nStderr: {process.stderr}\nStdout: {process.stdout}"
+                return f"Error: Repomix did not generate an output file at '{output_file_path}'.\nRepomix Output:\n{error_details}", None
     
     except Exception as e:
         progress(1, desc="Error during Repomix processing.")