[help] How to call other lua plugin exposed methods

[yyy33]

Like I want to develop my own plugin based on telescope, is it possible to use nvim-ox? Thanks

[patata3000]

Hello ! I've got the same question. 😄

Moreover I think that it would be a good example.

[patata3000]

Ok so after searching a couple hours, I understood that I was supposed to use mlua. Here is a small example :

// You must add `mlua` as a dependency in your Cargo.toml file.
use mlua::prelude::{LuaFunction, LuaTable};

use nvim_oxi::{self as oxi, Dictionary, Function};

// I don't understand yet what is this `_none` parameter.
// I added it and it's working but I guess I'll need to understand why at some point.
fn mlua_test(_none: ()) -> oxi::Result<()> {
    // You must also add feature `mlua` for nvim_oxi to your `Cargo.toml` as well.
    let lua = oxi::mlua::lua();

    // `lua.globals()` returns a reference to the global table of the Lua state.
    // `LuaFunction` is the type of what you `get` from the global table.
    // In this case it's a Lua function.
    let require = lua.globals().get::<_, LuaFunction>("require")?;

    // You can call this fuction like this to get the `telescope.builtin` table.
    let telescope_builtin: LuaTable = require.call("telescope.builtin")?;

    // I think that you get the point now.
    let find_files = telescope_builtin.get::<_, LuaFunction>("find_files")?;
    find_files.call(())?;

    Ok(())
}

#[oxi::module]
pub fn my_module() -> oxi::Result<Dictionary> {
    let mlua_test = Function::from_fn(mlua_test);
    Ok(Dictionary::from_iter([("mlua_test", mlua_test)]))
}

After installing it, you can do:

nvim -c "lua require'my_module'.mlua_test()"

I guess that you can go there for more in depth mlua usage -> https://github.com/mlua-rs/mlua

[noib3]

// I don't understand yet what is this _none parameter.

You need to add it because Function::from_fn() accepts a closure (or a function in this case) whose argument implements Poppable. If your function doesn't take any arguments you can just use (), just like you did.

[noib3]

I'll close this as completed but feel free to re-open it if you still have questions.