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hof Framework

repository·_next·Indexed 20 days ago

https://github.com/hofstadter-io/hof

A higher-order framework that unifies data models, schemas, code generation, and a task engine using CUE as its foundation. It provides deterministic, agentic code generation and extensible DAG workflows. The framework includes veg/env (formerly hof env), a CUE interface over Dagger that provides a unified configuration mesh for OCI containers, services, and workflows across local development and CI/CD.

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What's inside hof

  2. Overview of cuecmd implementations in hof

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    The cuecmd package provides implementations of core cue commands within the hof framework. These commands are designed to mirror the standard cue CLI functionality for convenience when working within the hof ecosystem.

    Note: Users should be aware that there may be slight divergences from the standard cue CLI behavior. If you encounter differences in command execution or file discovery, they should be reported to the maintainers.

  3. Overview of hof capabilities

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    hof is a CUE-powered CLI tool designed to enhance development workflows by using CUE for data modeling, schema definition, and code generation. It acts as a technology-agnostic layer that can be added to existing workflows to manage the lifecycle of data and code.

    Core Capabilities

    • Code Generation: Uses a Data + templates = _ (anything) model to generate files for any technology.
    • Data Modeling: Define and manage data models and lifecycle features as a single source of truth.
    • Task Engine: An extensible DAG (Directed Acyclic Graph) workflow engine with automatic task dependency inference.
    • CUE Commands: Provides core commands for def, eval, export, and vet.
    • Module Management: Uses CUE module dependency management to share and version models and generators.
    • TUI: A terminal user interface to explore data/config and work with CUE in live-reload mode.
    • Chat: Integrates LLMs with hof code generation for scalable results.
    • Creators: Provides bootstrapping and starter kits for various repository types.

  4. Overview of go-internal utilities

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    The go-internal package (found within the lib/gotils directory of the hof repository) provides a collection of utilities extracted and modified from the Go compiler and standard library. These utilities are designed for general-purpose use where the original internal packages of the Go toolchain are inaccessible due to import restrictions.

    Key functional areas include:

    • File & Directory Operations: dirhash for calculating directory tree hashes and txtar for simple text-based file archives.
    • Go Toolchain Emulation: goproxytest for testing GOPROXY implementations and modfile for reading/writing go.mod files while preserving comments and formatting.
    • Testing Infrastructure: testscript for script-based testing using .txtar files and testenv for accessing testing environment information.
    • Concurrency & Versioning: par for parallel execution and semver for semantic version parsing.
    • Module & Import Logic: module for handling module paths/versions and imports for OS/Architecture lists and import statement parsing.

  5. Overview of Data Systems utilities in hof

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    The lib/database directory provides a collection of data system utilities designed to be used within the datastore, datamodel, and flow packages. These utilities provide connectors and abstractions for various storage and communication layers, including SQL, NoSQL, Object Storage, Caching, and Messaging.

  6. Overview of tview components

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    tview provides a variety of rich interactive widgets for building terminal-based user interfaces. Available components include:

    • Input forms: Text input, selections, checkboxes, and buttons.
    • Text views: Navigable multi-color text views and editable multi-line text areas.
    • Data views: Sophisticated navigable table views and flexible tree views.
    • Lists: Selectable lists.
    • Layouts: Grid, Flexbox, and page layouts.
    • Other: Images, modal message windows, and an application wrapper.

  8. Detect system configuration directories in Go with ConfigDir

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    The configdir library provides a cross-platform way to locate standard configuration, data, and cache directories. It follows the Freedesktop.org XDG Base Directory Specification on Linux/Unix, and uses standard directories on Windows and macOS.

    Supported directory types include:

    TypeWindowsLinuxmacOS
    System-wide Configuration%PROGRAMDATA%$XDG_CONFIG_DIRS or /etc/xdg/Library/Application Support
    User-level Configuration%APPDATA%$XDG_CONFIG_HOME or $HOME/.config$HOME/Library/Application Support
    User-level Cache%LOCALAPPDATA%$XDG_CACHE_HOME or $HOME/.cache$HOME/Library/Caches

  9. What is the Task Engine

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    Hof's Task Engine is a CUE-powered Directed Acyclic Graph (DAG) processor. It allows you to define tasks and flows in CUE to process data, implement webhooks, or connect APIs. The engine automatically infers dependencies and executes tasks as they become ready or are required. You can use a library of built-in tasks and connectors or implement custom tasks using any container.

  10. What is veg/env?

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    veg/env (formerly hof env) is a CUE interface over Dagger that provides a unified configuration mesh for the software lifecycle. It combines the capabilities of Makefiles, Ansible, Dockerfiles, and Docker Compose into a single, modular fabric.

    It is used to define:

    • Images/Layers: The contents of OCI containers.
    • Stacks/Services: How services are composed and run.
    • Workflows/Tasks: Processes spanning local development, CI/CD, and staged deployment.

    Key features include automatic DAG (Directed Acyclic Graph) evaluation with dependency ordering and advanced caching.

  12. Iterative development workflow with code generation

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    The hof development cycle supports an iterative workflow where you can:

    1. Update designs: Modify your schemas, generators, or templates.
    2. Edit output: Write custom logic directly in the generated files.
    3. Regenerate: Run the code generation process to update the codebase based on new designs while maintaining the ability to continue customizing the output.