cliyard

CLI + YAML + Yard — a framework that generates CLI commands from YAML specs. Define your REST API in a few YAML files, and cliyard produces a fully-structured Click CLI with parameters, types, response formatting, and auto-generated help.

Installation

pip install cliyard

# Or for development
pip install -e .

Quick Start

# Generate a CLI from spec files
cliyard gen --name mycli --defs-path ./specs/
cd mycli && pip install -e .

# Use it
mycli --help
mycli repos list --page-size 10

How It Works

cliyard turns a directory of YAML files into CLI commands. One directory equals one API service. Each YAML file becomes a resource group with subcommands for every defined method.

specs/
├── _auth.yaml              # Service config: name, servers, auth chain
├── _groups.yaml            # (optional) Group definitions for nesting
├── _flows.yaml             # (optional) Flow orchestration index
├── resources/              # Resource YAML files
│   ├── repos.yaml
│   └── ...
├── flows/                  # (optional) Flow step definitions
│   ├── _flow_create_repo.yaml
│   └── ...
└── plugins/                # Python plugins
    └── *.py

Data flow for a single invocation:

CLI input → bind & validate → auth chain → assemble request → HTTP call → format response

Features

YAML-driven: Add a new API resource by creating a .yaml file, no code changes
Plugin system: 7 extension points for auth, types, hooks, methods, commands, field resolvers, flow steps
Flow orchestration: Define multi-step workflows with conditional branching, loops, and lifecycle hooks
Multi-server: Support multiple API endpoints in a single CLI
Rich output: Tables, JSON, CSV formatting with datetime conversion
Resource grouping: Nest related commands under parent groups

Examples

See the examples/ directory for ready-to-use spec sets:

examples/demo/ — Pet Store API demo with resource commands, plugins, and flow orchestration

# Library mode (read YAML at runtime)
python3 -c "from cliyard.runtime import create_cli; create_cli('examples/demo')()"

# Flow orchestration
petstore flow-run add-user --name 张三
petstore flow-run retry-demo
petstore flow-run plugin-demo
petstore flow-run hook-demo

Documentation

Generated CLI projects include a README.md with full usage docs covering:

Usage & environment management
Adding new resources
Plugin authoring (all 7 plugin types)
Flow orchestration with conditional branching, loops, and hooks
Multi-server configuration
Custom method plugins

License

MIT

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