clap

What problem does it solve?

This Skill streamlines the creation of robust and user-friendly command-line interface (CLI) tools in Rust, handling complex argument parsing, configuration, and testing.

Core Features & Use Cases

• Declarative Argument Parsing: Define CLI arguments, subcommands, and options using Rust structs and derive macros.
• Configuration Layering: Seamlessly merge settings from CLI flags, environment variables, and configuration files.
• Testing: Write integration tests for your CLI's argument parsing, output, and exit codes using assert_cmd.
• Use Case: Develop a Rust CLI tool for managing cloud infrastructure that accepts global flags for authentication, has subcommands for deploying and destroying resources, and can load environment-specific configurations from a file.

Quick Start

Use the clap skill to create a Rust CLI application with a subcommand named 'serve' that accepts an optional port argument.