dotfiles/.config/nixpkgs/neovim/neovim.nix

{ lib
, stdenv
, writeTextFile
, neovim-unwrapped
, makeWrapper
, fd
, ripgrep
, node-lsp
, vimPlugins
, fetchFromGitHub
, withPlayground ? false
, withLuadev ? false
}:
let
  buildNeovimPlugin = attrs: stdenv.mkDerivation ({
    forceShare= [ "man" "info" ];

    installPhase = ''
      cp -r . $out

      if [ -d "$out/doc" ]; then
        ${neovim-unwrapped}/bin/nvim -N -u NONE -i NONE -n -E -s -V1 -c "helptags $out/doc" +quit!
      fi
    '';
  } // attrs);
  extra-treesitter-textobjects = writeTextFile {
    name = "extra-treesitter-textobjects";
    destination = "/after/queries/javascript/textobjects.scm";
    text = ''
      ; support swapping elements inside arrays too
      (array "," . (_) @parameter.inner)
      (array . (_) @parameter.inner ",")
    '';
  };

  extraPath = [
    fd
    ripgrep
    node-lsp
  ];

  nixpkgsPlugins =
    let
      # we take nvim-treesitter from nixpkgs as the plugin and grammar versions
      # must match exactly
      nvim-treesitter = (vimPlugins.nvim-treesitter.withPlugins (p: with p; [
        tree-sitter-bash
        tree-sitter-css
        tree-sitter-elvish
        tree-sitter-go
        tree-sitter-javascript
        tree-sitter-json
        tree-sitter-lua
        tree-sitter-nix
        tree-sitter-ruby
        tree-sitter-tsx
        tree-sitter-typescript
      ] ++ lib.optionals withPlayground [
        tree-sitter-query
      ]));
    in
    [ nvim-treesitter ] ++ nvim-treesitter.dependencies
    ++ (lib.optionals withPlayground [
      vimPlugins.playground
    ])
    ++ (lib.optionals withLuadev [
      vimPlugins.nvim-luadev
    ]);

  pinnedPlugins = import ./plugins {
    inherit buildNeovimPlugin fetchFromGitHub;
  };

  plugins = (lib.attrValues pinnedPlugins)
    ++ nixpkgsPlugins
    ++ [
      extra-treesitter-textobjects
    ];
in
stdenv.mkDerivation {
  pname = "nvim";
  version = neovim-unwrapped.version;

  initVim = ''
    let g:loaded_python3_provider = 0
    let g:loaded_ruby_provider = 0
    let g:loaded_node_provider = 0
    let g:loaded_perl_provider = 0

    set runtimepath^=${placeholder "out"}/lib
    set packpath^=${placeholder "out"}/lib

    source ${./settings.lua}
    source ${./plugins.lua}
    source ${./mappings.lua}
    source ${./autocmd.lua}
    source ${./lsp.lua}
    source ${./theme.lua}
  '' + lib.optionalString withPlayground ''
    source ${./playground.lua}
  '' + lib.optionalString withLuadev ''
    source ${./luadev.lua}
  '';

  passAsFile = [ "initVim" ];

  nativeBuildInputs = [ makeWrapper ];

  unpackPhase = ":";

  buildPhase = ''
    # build pack / runtime dir
    mkdir -p lib/pack/nixpkgs/start
    ${lib.concatMapStringsSep "\n" (p: ''
      ln -s "${p}" "lib/pack/nixpkgs/start/${lib.getName p}"
    '') plugins}

    # create config file
    mkdir etc
    cp "$initVimPath" etc/init.vim

    # symlink in man pages
    mkdir -p share
    ln -s ${neovim-unwrapped}/share/man share/man

    # make bin
    mkdir bin
    makeWrapper ${neovim-unwrapped}/bin/nvim bin/nvim \
      --prefix PATH : ${lib.makeBinPath extraPath} \
      --add-flags -u \
      --add-flags $out/etc/init.vim
  '';

  installPhase = ''
    mkdir $out
    cp -r * $out
  '';
}