sceptre

import os import sys from io import StringIO from unittest.mock import patch from sceptre.cli import sceptre # Sceptre is primarily a CLI tool that operates on a project structure. # For full functionality (e.g., `launch`, `validate`), you need: # 1. A Sceptre project directory (e.g., `./config`, `./templates`). # 2. AWS credentials configured (e.g., via ~/.aws/credentials, environment variables). # This example demonstrates how to call a simple Sceptre command programmatically # that does not require a project setup or AWS credentials, making it runnable. print("Attempting to get Sceptre version programmatically...") # Mock sys.stdout to capture output without affecting the console directly with patch('sys.stdout', new_callable=StringIO) as mock_stdout: try: # Call the Sceptre CLI programmatically to get its version # This command is safe and does not require AWS setup. sceptre(["--version"]) output = mock_stdout.getvalue() print(f"Sceptre version output:\n{output.strip()}") except SystemExit as e: # Sceptre CLI often uses sys.exit(), which `sceptre.cli.sceptre` reflects. # A SystemExit with code 0 usually indicates success for '--version'. if e.code != 0: print(f"Error: Sceptre command exited with code {e.code}") else: print(f"Sceptre command finished (exit code {e.code}).") print("\nTo run actual Sceptre deployment commands (e.g., 'launch'):") print(" 1. Ensure you have a Sceptre project structure (config/ and templates/ directories).") print(" 2. Configure your AWS credentials (e.g., environment variables or ~/.aws/credentials).") print(" Example (if project set up): # sceptre([\"launch\", \"dev/my-stack\"])")