Initial commit by AGI Operating System

hello_world.py

@@ -0,0 +1,179 @@
+#!/usr/bin/env python3
+"""
+Enhanced Hello World Script
+Version: 1.0.1
+Author: The Optimizer - Performance & Security Engineer
+Date: 2026-03-16
+Description: Enhanced hello world script with comprehensive logging,
+error handling, and CLI support.
+Optimized for security and performance.
+"""
+
+import argparse
+import logging
+import sys
+from logging.handlers import RotatingFileHandler
+import traceback
+
+# Global configuration
+LOG_FILE = "hello_world.log"
+LOG_MAX_BYTES = 5 * 1024 * 1024  # 5MB
+LOG_BACKUP_COUNT = 3
+DEFAULT_NAME = "World"
+
+
+def setup_logging():
+    """Configure comprehensive logging system"""
+    try:
+        logger = logging.getLogger()
+        logger.setLevel(logging.DEBUG)
+
+        file_handler = RotatingFileHandler(
+            LOG_FILE,
+            maxBytes=LOG_MAX_BYTES,
+            backupCount=LOG_BACKUP_COUNT,
+            encoding="utf-8",
+        )
+        file_handler.setLevel(logging.DEBUG)
+
+        console_handler = logging.StreamHandler(sys.stdout)
+        console_handler.setLevel(logging.INFO)
+
+        formatter = logging.Formatter(
+            "%(asctime)s - %(name)s - %(levelname)s - %(message)s"
+        )
+
+        file_handler.setFormatter(formatter)
+        console_handler.setFormatter(formatter)
+
+        logger.addHandler(file_handler)
+        logger.addHandler(console_handler)
+
+        logging.info("Logging system initialized successfully")
+        return logger
+
+    except Exception as e:
+        logging.error(f"Failed to initialize logging system: {e}")
+        logging.debug(traceback.format_exc())
+        sys.exit(1)
+
+
+def parse_arguments():
+    """Parse command-line arguments with comprehensive validation"""
+    try:
+        parser = argparse.ArgumentParser(
+            description="Enhanced Hello World Script with comprehensive features",
+            formatter_class=argparse.RawDescriptionHelpFormatter,
+        )
+
+        parser.add_argument(
+            "-n",
+            "--name",
+            type=str,
+            default=DEFAULT_NAME,
+            help="Name to greet (default: World)",
+        )
+
+        parser.add_argument(
+            "-l",
+            "--log-level",
+            type=str.upper,
+            choices=["DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL"],
+            default="INFO",
+            help="Set logging level (default: INFO)",
+        )
+
+        parser.add_argument(
+            "-v",
+            "--version",
+            action="version",
+            version="Enhanced Hello World Script 1.0.1",
+        )
+
+        args = parser.parse_args()
+
+        if args.log_level:
+            logging.getLogger().setLevel(getattr(logging, args.log_level))
+
+        logging.info(f"Command-line arguments parsed successfully: {args}")
+        return args
+
+    except Exception as e:
+        logging.error(f"Failed to parse command-line arguments: {e}")
+        logging.debug(traceback.format_exc())
+        sys.exit(1)
+
+
+def greet(name):
+    """Generate greeting message with validation"""
+    try:
+        if not name or not isinstance(name, str):
+            raise ValueError("Name must be a non-empty string")
+
+        if len(name) > 100:
+            raise ValueError("Name cannot exceed 100 characters")
+
+        message = f"Hello, {name}!"
+        logging.info(f"Generated greeting message: {message}")
+        return message
+
+    except ValueError as e:
+        logging.error(f"Validation error in greet function: {e}")
+        raise
+    except Exception as e:
+        logging.error(f"Unexpected error in greet function: {e}")
+        logging.debug(traceback.format_exc())
+        raise
+
+
+def main():
+    """Main application entry point with comprehensive error handling"""
+    try:
+        logging.info("Application started")
+
+        logger = setup_logging()
+
+        args = parse_arguments()
+
+        try:
+            message = greet(args.name)
+            print(message)
+            logging.info("Greeting displayed successfully")
+
+        except ValueError as e:
+            logging.error(f"Invalid input: {e}")
+            print(f"Error: {e}", file=sys.stderr)
+            sys.exit(1)
+
+        except Exception as e:
+            logging.critical(f"Unexpected error during greeting: {e}")
+            logging.debug(traceback.format_exc())
+            print(
+                "An unexpected error occurred. Check logs for details.",
+                file=sys.stderr,
+            )
+            sys.exit(1)
+
+        logging.info("Application completed successfully")
+
+    except SystemExit as e:
+        logging.warning(f"Application exiting with code: {e.code}")
+        raise
+
+    except KeyboardInterrupt:
+        logging.warning("Application interrupted by user")
+        print("\nOperation cancelled by user.", file=sys.stderr)
+        sys.exit(1)
+
+    except Exception as e:
+        logging.critical(f"Fatal error in main application: {e}")
+        logging.debug(traceback.format_exc())
+        print(
+            "A fatal error occurred. Check logs for details.",
+            file=sys.stderr,
+        )
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()