vim.nix

{config,pkgs,...}:

let
  myVim = pkgs.vim_configurable.customize {
    name = "vim";
    vimrcConfig.customRC = ''
      set nocompatible

      syntax on
        
      set hidden

      set wildmenu
 
      set showcmd
  
      set hlsearch

      set ignorecase
      set smartcase
 
      set backspace=indent,eol,start
   
      set autoindent
 
      set ruler

      set laststatus=2

      set confirm

      set visualbell

      set number

      set notimeout ttimeout ttimeoutlen=200

      set pastetoggle=<F2>

      set shiftwidth=2
      set shiftround
      set softtabstop=4
      set expandtab

      map Y y$

      nnoremap <C-L> :nohl<CR><C-L>
      let mapleader = ","

      cmap w!! w !sudo tee % >/dev/null

      set t_Co=256
      colorscheme colorful256

      au VimEnter * RainbowParenthesesToggle
      au Syntax * RainbowParenthesesLoadRound
      au Syntax * RainbowParenthesesLoadSquare
      au Syntax * RainbowParenthesesLoadBraces

      map <Leader>s :SyntasticToggleMode<CR>

      let g:syntastic_always_populate_loc_list = 1
      let g:syntastic_auto_loc_list = 1
      let g:syntastic_check_on_open = 1
      let g:syntastic_check_on_wq = 0

      set autoread

      au FocusGained,BufEnter * :silent! !

      map <silent> tw :GhcModTypeInsert<CR>
      map <silent> ts :GhcModSplitFunCase<CR>
      map <silent> tq :GhcModType<CR>
      map <silent> te :GhcModTypeClear<CR>
      map <silent> tc :GhcModCheck<CR>

      " autocmd FileType rust :packadd rust-vim
      " autocmd FileType haskell :packadd ghc-mod
      " autocmd FileType haskell :packadd neco-ghc
      " autocmd FileType nix :packadd vim-nix

      let g:NERDSpaceDelims = 1
      let g:NERDCompactSexyComs = 1
      let g:NERDTrimTrailingWhitespace = 1

      let g:SuperTabDefaultCompletionType = '<c-x><c-o>'

      if has("gui_running")
        imap <c-space> <c-r>=SuperTabAlternateCompletion("\<lt>c-x>\<lt>c-o>")<cr>
      else " no gui
        if has("unix")
          inoremap <Nul> <c-r>=SuperTabAlternateCompletion("\<lt>c-x>\<lt>c-o>")<cr>
        endif
      endif

      let g:haskellmode_completion_ghc = 1
      autocmd FileType haskell setlocal omnifunc=necoghc#omnifunc

      map <Leader>n :NERDTreeToggle<CR>

      let g:haskell_tabular = 1

      vmap a= :Tabularize /=<CR>
      vmap a; :Tabularize /::<CR>
      vmap a- :Tabularize /-><CR>

      map <silent> <Leader>t :CtrlP()<CR>
      noremap <leader>b<space> :CtrlPBuffer<cr>
      let g:ctrlp_custom_ignore = '\v[\/]dist$'
    '';

    vimrcConfig.packages.myVimPackage = with pkgs.vimPlugins; {
        start = [
          vim-colorschemes 
          rainbow_parentheses
          syntastic
          vimproc
          ctrlp
          neocomplete
          The_NERD_Commenter
          The_NERD_tree
          supertab
          tabular
          tlib
          vim-addon-mw-utils
          vim-repeat
          snipmate
          surround
          rust-vim
          ghcmod
          neco-ghc
          vim-nix
          fugitive
      ];

      #opt = [
      #  rust-vim
      #  ghcmod
      #  neco-ghc
      #  vim-nix
      #];
    };
  };
in
{
  environment.systemPackages = [ myVim ];
  environment.shellAliases.vi = "vim";
  environment.variables.EDITOR = "vim";
  programs.bash.shellAliases = {
    vi = "vim";
    svim = "sudo vim";
  };
  nixpkgs.config.vim.ftNix = false;
}