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# Mìng Lìng - 命令
> [!WARNING]
>
> **Note**: Mingling is still under active development, and its API may change. Feel free to try it out and give us feedback!
`Mingling` is a Rust command-line framework. Its name comes from the Chinese Pinyin for "命令", which means "Command".
## Quick Start
The example below shows how to use `Mingling` to create a simple command-line program:
```rust
use mingling::macros::{dispatcher, gen_program, r_println, renderer};
#[tokio::main]
async fn main() {
let mut program = DefaultProgram::new();
program.with_dispatcher(HelloCommand);
// Execute
program.exec().await;
}
// Define command: "<bin> hello"
dispatcher!("hello", HelloCommand => HelloEntry);
// Render HelloEntry
#[renderer]
fn render_hello_world(_prev: HelloEntry) {
r_println!("Hello, World!")
}
// Fallbacks
#[renderer]
fn fallback_dispatcher_not_found(prev: DispatcherNotFound) {
r_println!("Dispatcher not found for command `{}`", prev.join(", "))
}
#[renderer]
fn fallback_renderer_not_found(prev: RendererNotFound) {
r_println!("Renderer not found `{}`", *prev)
}
// Collect renderers and chains to generate DefaultProgram
gen_program!();
```
Output:
```
> mycmd hello
Hello, World!
> mycmd hallo
Subcommand not found: 'mycmd hallo'
```
## Core Concepts
Mingling abstracts command execution into the following parts:
1. **Dispatcher** - Routes user input to a specific renderer or chain based on the command node name.
2. **Chain** - Transforms the incoming type into another type, passing it to the next chain or renderer.
3. **Renderer** - Stops the chain and prints the currently processed type to the terminal.
4. **Program** - Manages the lifecycle and configuration of the entire CLI application.
## License
This project is licensed under the MIT License.
See [LICENSE-MIT](LICENSE-MIT) or [LICENSE-APACHE](LICENSE-APACHE) file for details.
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