system/home/progs/nvim/default.nix

{ lib, config, pkgs, ... }:

with lib;

let
  cfg = config.progs.nvim;

  customPlugins = pkgs.callPackage ./custom_plugins.nix {
    inherit (pkgs.vimUtils) buildVimPlugin;
  };

  plugins = pkgs.vimPlugins // customPlugins;

  myVimPlugins = with plugins; [
    coc-tsserver # typescript LSP
    coc-eslint # eslint LSP
    coc-rust-analyzer # rust LSP

    editorconfig-vim # use project .editorconfig to configure editor
    lightline-vim # configurable status line
    material-vim # modern theme with true colors support
    vim-nix # nix support
    vim-easymotion # highlights keys to move quickly
    vim-gitgutter # shows git diff markers in the sign column
    nerdtree # tree explorer
    nerdtree-git-plugin # shows files git status on the NerdTree
    neoformat # formating code
    nvim-treesitter # treesitter configurations and abstraction layer
    fzf-vim # fuzzy finder
    blamer-nvim # A git blame plugin
  ];

  # Additional language servers that we should install mannually
  lspPackages = with pkgs; [ rnix-lsp ];
  # Additional tools
  fzfToolsPackages = with pkgs; [ fzf ripgrep ];

  additionalPackages = lspPackages ++ fzfToolsPackages;

  vimConfig = builtins.readFile ./config.vim;
  cocConfig = import ./coc_settings.nix;
in
{
  options.progs.nvim = {
    enable = mkOption {
      type = types.bool;
      default = false;
      description = "Add and configure neovim";
    };

    default = mkOption {
      type = types.bool;
      default = false;
      description = "Set neovim as default editor";
    };
  };

  config = mkIf cfg.enable {
    home.packages = additionalPackages;

    programs.neovim = {
      enable = true;
      extraConfig = vimConfig;
      plugins = myVimPlugins;
      viAlias = true;
      vimAlias = true;
      coc = {
        enable = true;
        settings = cocConfig;
      };
    };

    xdg.configFile = {
      "nvim/lua".source = ./lua;
    };

    home.sessionVariables = mkIf cfg.default {
      EDITOR = "nvim";
    };
  };
}