{ config, pkgs, ... }:
let
  gitpkgs = import <gitpkgs> {};
  commonPkgs = with pkgs; [
    xsel
  ];

  goPkgs = with gitpkgs; [
    go_1_6
    gotools.bin
#    godef.bin
    godep
#    go-errcheck.bin
  ];
  pythonPkgs = with pkgs.python2Packages; [
    blockdiag
    seqdiag
    actdiag
    nwdiag
    #packetdiag
    #rackdiag
  ];

in {
  environment.systemPackages = commonPkgs ++ goPkgs ++ pythonPkgs ++ [
    (pkgs.neovim.override {
      vimAlias = true;
      configure = {
        # add custom .vimrc lines like this:
        customRC = ''
          set nocompatible

          " leader
          let mapleader = ','

          set hidden
          syntax on
          set hlsearch
          set number

          " mappings to stop insert mode
          imap jjj <ESC>
          imap kkk <ESC>
          imap lll <ESC>
          imap hhh <ESC>
          set scroll=11

          noremap <C-n> :tabn<CR>
          noremap <C-p> :tabp<CR>
          let g:ctrlp_map = '<tab>'
          set wildignore+=*/site/*,*.so,*.swp,*.zip
          let g:ctrlp_custom_ignore = {
            \ 'dir':  '\v[\/]\.(git|hg|svn|)$$',
            \ 'file': '\v\.(exe|so|dll)$$',
            \ }

          "let g:ctrlp_match_func = { 'match': 'pymatcher#PyMatch' }
          "let g:pydiction_location = '~/.vim/bundle/pydiction/complete-dict'

          " allways show status line
          set ls=2
          set tabstop=4
          set shiftwidth=4
          set softtabstop=4
          set expandtab
          "set textwidth=80

          let g:tagbar_type_go = {
            \ 'ctagstype' : 'go',
            \ 'kinds'     : [
                \ 'p:package',
                \ 'i:imports:1',
                \ 'c:constants',
                \ 'v:variables',
                \ 't:types',
                \ 'n:interfaces',
                \ 'w:fields',
                \ 'e:embedded',
                \ 'm:methods',
                \ 'r:constructor',
                \ 'f:functions'
            \ ],
            \ 'sro' : '.',
            \ 'kind2scope' : {
                \ 't' : 'ctype',
                \ 'n' : 'ntype'
            \ },
            \ 'scope2kind' : {
                \ 'ctype' : 't',
                \ 'ntype' : 'n'
            \ },
            \ 'ctagsbin'  : 'gotags',
            \ 'ctagsargs' : '-sort -silent'
            \ }

          " syntastic {
          au FileType qf setlocal wrap linebreak
          let g:syntastic_always_populate_loc_list = 1
          let g:syntastic_auto_loc_list = 0
          let g:syntastic_check_on_open = 1
          let g:syntastic_check_on_wq = 0
          if has("gui_running")
              set mouse=a
          else
                set mouse=
          endif

          set wildignore+=*/site/*,*.so,*.swp,*.zip
          let g:ctrlp_custom_ignore = {
            \ 'dir':  '\v[\/]\.(git|hg|svn|)$$',
            \ 'file': '\v\.(exe|so|dll)$$',
            \ }
          " }

          " spelling {{{
          au BufRead,BufNewFile *.md,*.markdown setlocal spell spelllang=en_us,de_de
          " }}}

          " sync default register to clipboard {
          if has('unnamedplus')
            set clipboard=unnamedplus
          else
            set clipboard=unnamed
          endif
          " }

          " colored brackets {
          let g:rbpt_colorpairs = [
              \ ['brown',       'RoyalBlue3'],
              \ ['Darkblue',    'SeaGreen3'],
              \ ['darkgray',    'DarkOrchid3'],
              \ ['darkgreen',   'firebrick3'],
              \ ['darkcyan',    'RoyalBlue3'],
              \ ['darkred',     'SeaGreen3'],
              \ ['darkmagenta', 'DarkOrchid3'],
              \ ['brown',       'firebrick3'],
              \ ['gray',        'RoyalBlue3'],
              \ ['black',       'SeaGreen3'],
              \ ['darkmagenta', 'DarkOrchid3'],
              \ ['Darkblue',    'firebrick3'],
              \ ['darkgreen',   'RoyalBlue3'],
              \ ['darkcyan',    'SeaGreen3'],
              \ ['darkred',     'DarkOrchid3'],
              \ ['red',         'firebrick3'],
              \ ]
          let g:rbpt_max = 16
          let g:rbpt_loadcmd_toggle = 0

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

          set t_ut=
          colorscheme PaperColor

          " Python {{{
          augroup ft_python
              au!
              au FileType python setlocal omnifunc=pythoncomplete#Complete
              au FileType python setlocal define=^\s*\\(def\\\\|class\\)
          augroup END
          " }}}

          " YAML {{{
          augroup ft_yaml
              au!
              setlocal autoindent sw=2 et tabstop=2 shiftwidth=2 softtabstop=2
          augroup END
          " }}}

          " vim-go {
          let g:go_highlight_functions = 1
          let g:go_highlight_methods = 1
          let g:go_highlight_structs = 1
          let g:go_highlight_interfaces = 1
          let g:go_highlight_operators = 1
          let g:go_highlight_build_constraints = 1
"          let g:go_fmt_command = "goimports"

          au FileType go nmap <Leader>gds <Plug>(go-def-split)
          au FileType go nmap <Leader>gdv <Plug>(go-def-vertical)
          au FileType go nmap <Leader>gdt <Plug>(go-def-tab)
          " }

         '';

         vam.knownPlugins = gitpkgs.vimPlugins; # optional
         vam.pluginDictionaries = [ # full ducomentation at github.com/MarcWeber/vim-addon-manager
           "vim-addon-vim2nix"
           "youcompleteme"
           "vim-airline"
           "vim-addon-nix"
           "ctrlp"
           "vim-go"
#           "syntastic"
           "tagbar"
           "vim-css-color"
           "rainbow_parentheses"
           "vim-colorschemes"
           "vim-colorstepper"
           "vim-signify"
#           "vim-pandoc"
#           "vim-pandoc-syntax"
#           "vim-pandoc-after"
#           "vimpreviewpandoc"
         ];
      };
      extraPythonPackages = with gitpkgs.python2Packages; [
        pandocfilters
        htmltreediff
        html5lib
        dbus
      ] ++ pythonPkgs;
      withPython3 = false;
    })
  ];
}