$ show dw-0/kiauh
KIAUH (Klipper Installation And Update Helper) is a text-based user interface (TUI) and CLI tool for managing the Klipper 3D printer firmware ecosystem. It automates installation, update, removal, and backup of core components (Klipper, Moonraker, Mainsail, Fluidd, KlipperScreen, Crowsnest) and a wide range of community extensions (OctoPrint, Telegram Bot, Obico, Spoolman, etc.). The tool runs on Linux systems (primarily Raspberry Pi and similar SBCs) and handles systemd services, Python virtual environments, git repositories, nginx configuration, and system package management. Architecturally, KIAUH is a Python package with a modular design: a core framework provides menu navigation, logging, spinner animations, and a backend abstraction layer for command execution and filesystem operations. Components and extensions are implemented as classes inheriting from BaseExtension, each with install/update/remove methods. The tool supports multiple printer instances via an InstanceManager and uses a custom SimpleConfigParser for round-trip safe manipulation of Klipper-style configuration files. A headless CLI mode enables scripted, non-interactive operation. The codebase demonstrates solid engineering practices: dependency injection for testability, a plugin architecture for extensions, extensive test coverage (pytest with fake backends), and a well-organized package structure. Key reusable assets include the SimpleConfigParser (a standalone, comment-preserving config parser), the backend abstraction (enabling deterministic testing), and the BaseExtension plugin interface. While the tool is actively maintained and widely used, some areas show technical debt such as singleton proliferation, direct subprocess calls in places, and a Python 3.8 baseline that may limit future compatibility.
The LLM identified 4 files worth highlighting for reuse:
A standalone, regex-based parser for Klipper-style INI configuration files. It handles sections, options, multiline values, gcode blocks, and SAVE_CONFIG sections while preserving comments, blank lines, and formatting. Provides getval, getint, getboolean, set_option, add_section, remove_option, and write methods. Extensively tested with a comprehensive test suite. Can be extracted and reused in any project needing a robust, formatting-preserving config parser.
Defines CommandRunner and FilesystemBackend protocols (using typing.Protocol) and provides global singleton instances. This abstraction allows all modules to use a single injectable backend for subprocess calls and file operations, making the entire codebase testable by swapping in fake implementations (FakeCommandRunner, FakeFilesystemBackend) during tests. A clean pattern for decoupling system interactions.
Abstract base class for all KIAUH extensions, defining the interface (install_extension, update_extension, remove_extension) and providing common utilities like backup, git operations, and service management. Extensions are discovered dynamically via metadata.json files and registered in a shared menu. This pattern enables third-party developers to add new components without modifying core code, and the interface is clean enough to be reused in other installer frameworks.
Provides generic backup methods for files and directories, creating timestamped backups in ~/kiauh_backups/. Includes specific methods for backing up printer.cfg, moonraker.conf, and entire config directories. Used by nearly every component and extension before updates or removals. The pattern is simple and reusable: compress or copy files with a timestamp, with configurable backup root.