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

{ lib
, stdenv
, writeShellScriptBin
, 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 = "/queries/ecma/textobjects.scm";
    text = ''
      ;; extends

      ; consider array elements as @parameter text objects too
      (array
        "," @_start .
        (_) @parameter.inner
        (#make-range! "parameter.outer" @_start @parameter.inner))
      (array
        . (_) @parameter.inner
        . ","? @_end
        (#make-range! "parameter.outer" @parameter.inner @_end))
    '';
  };
  tsc = writeShellScriptBin "tsc" ''
    if [ -x "./node_modules/.bin/tsc" ]; then
      exec ./node_modules/.bin/tsc "$@"
    else
      exec ${node-lsp}/lib/node_modules/node-lsp/node_modules/.bin/tsc "$@"
    fi
  '';

  extraPath = [
    fd
    ripgrep
    node-lsp
    tsc
  ];

  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-markdown
        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
    ];

  generic = { initText ? "", enabledPlugins ? [], passthru ? {} }: 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

      ${initText}
    '';

    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}"
      '') enabledPlugins}

      # 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
    '';

    inherit passthru;

    installPhase = ''
      mkdir $out
      cp -r * $out
    '';
  };
in
generic {
  initText = ''
    source ${./settings.lua}
    source ${./plugins.lua}
    source ${./mappings.lua}
    source ${./autocmd.lua}
    source ${./lsp.lua}
    source ${./make.lua}
    source ${./theme.lua}
  '' + lib.optionalString withPlayground ''
    source ${./playground.lua}
  '' + lib.optionalString withLuadev ''
    source ${./luadev.lua}
  '';

  enabledPlugins = plugins;

  passthru = {
    minimal = generic {};
  };
}