How can I add a directory with Lua module?

[nawordar]

In my old pre-Nix Neovim config I already have quite a lot of Lua code split into multiple files and directories. For instance, I have a custom function for formatting which I would like to map to <LocalLeader>\. That function calls other functions from a utility module shared with other functions. What would be the best approach to add this directory to my Nixvim config?

[GaetanLepage]

You can use the files option to output the generated lua code to a different file than init.lua.

files."foo/bar.lua".keymaps = [
  {
    key = "<C-m>";
    action = "foo";
  }
];

Will generate a file at ~/.config/nvim/foo/bar.lua with the following content:

vim.keymap.set("", "<C-m", "foo", {})

(well not exactly this content but an equivalent).

[nawordar]

I know about that, but this is not what I want. I have a lot of custom functions in ~/.config/nvim/lua/cdro in my old config. I would like to move that directory to the new NixVim config and refer to functions defined in it from Nix:

keymaps = [
  {
    key = "<LocalLeader>\\";
    action = "require('cdro').format()";
    mode = "n";
    lua = true;
  }
];

I don't want to embed whole Lua functions in Nix, as their definitions are too long. I think I will end up packaging the directory as a plugin and load it via extraPlugins. I just thought there may be a simpler way

[GaetanLepage]

Wouldn't the following work ?

files."lua/crdo/init.lua".extraConfigLua = builtins.readFile ./crdo.lua;

Of course, the plugin approach is perfectly fine as well (maybe even cleaner).