Define a keymap in Nixvim

Keymaps are defined under the programs.nixvim.keymaps option.

This option is a list of attrsets with:

Takes in four arguments:

• mode: The mode shorthand, or an array of mode shorthands ([ "n" "i" "v" ])
• key: The user binding (called left-hand side)
• action: What the binding does (called the right-hand side)
• options: An optional attrset of arguments and options

{
  programs.nixvim.keymaps = [
    {
      key = "]";
      action = "<CMD>lua require('goto-preview').goto_preview_definition()<CR>";
      options = { desc = "Preview declaration"; };
      mode = "n";
    }
  ];
}

To execute a Lua function in your keybind, use action.__raw:

  {
    key = "<Leader>S";
    action.__raw = ''
      function()
        require('resession').save(vim.fn.getcwd(), { dir = "dirsession" })
      end
    '';
    options = { desc = "Save session"; };
    mode = "n";
  }

Note

The raw action must be wrapped in a function().

See the Nixvim options on keymaps for more info