rhai-autodocs

Generate Markdown/MDX documentation from a rhai::Engine instance.

Published with Mdbook. Published with Docusaurus.

Features

• Output native Rust Rhai function and custom types documentation as Markdown with HTML and Docusaurus with MDX.
• Function ordering using the # rhai-autodocs:index:x directive in your docs.
• Rust docs 'sections' (# Section in markdown) displayed with tabs.

How to use

use rhai::exported_module;
use rhai::plugin::*;

// 1. Create a plugin module or any kind of Rhai API that supports documentation on functions and types.

/// My own module.
#[export_module]
mod my_module {
    use rhai::plugin::*;

    /// A function that prints to stdout.
    ///
    /// # Args
    ///
    /// * message - append a message to the greeting. (optional)
    ///
    /// # rhai-autodocs:index:1
    #[rhai_fn(global, name = "hello_world")]
    pub fn hello_world_message(message: &str) {
        println!("Hello, World! {message}");
    }

    /// A function that prints to stdout.
    ///
    /// # Args
    ///
    /// * message - append a message to the greeting. (optional)
    ///
    /// # rhai-autodocs:index:1
    #[rhai_fn(global, name = "hello_world")]
    pub fn hello_world() {
        println!("Hello, World!");
    }

    /// A function that adds two integers together.
    ///
    /// # rhai-autodocs:index:2
    #[rhai_fn(global)]
    pub fn add(a: rhai::INT, b: rhai::INT) -> rhai::INT {
        a + b
    }

    /// Documentation for functions that do not have the index preprocessor
    /// is ignored.
    #[rhai_fn(global)]
    pub fn dont_care() {
        println!("nope");
    }
}

// 2. Generate the docs with autodocs. This library can be imported as a build dependency into your build script.
//    A typical documentation generation workflow would look like this:

// Specify an environment variable that points to the directory
// where the documentation will be generated.
let docs_path = std::env::var("DOCS_DIR").unwrap_or("target/docs".to_string());

let mut engine = rhai::Engine::new();

// We register the module defined in the previous code block for this example,
// but you could register other functions and types ...
engine.register_static_module("my_module", exported_module!(my_module).into());

let docs = rhai_autodocs::options()
    .include_standard_packages(false)
    .generate(&engine)
    .expect("failed to generate documentation");

// Write the documentation in a file, or output to stdout, etc.
for (name, docs) in rhai_autodocs::generate_for_docusaurus(&docs).expect("failed to generate mdx for docusaurus") {
    println!("docs for module {name}");
    println!("{docs}");
}

You need to import the styles/default.css file and src/tabs.js script for everything to work correctly using the mdbook generation. (You can of course override the styles and javascript code if you wish)

For more details, see the examples.