{ gitpkgs ? import /home/steveej/src/github/NixOS/nixpkgs {}
, pkgs ? gitpkgs
, name ? "generic"
, version
, extraBuildInputs ? []
, extraShellHook ? ""
}:
let
  go = builtins.getAttr "go_${version}" pkgs;
  commonVimRC = ''
    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'
      \ }

    " 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 = 'gofmt'
    let g:go_fmt_options= '-s'
    let g:go_def_mode = 'godef'
    let g:go_def_reuse_buffer = 0

    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)
    au FileType go nmap <Leader>gi <Plug>(go-imports)
    " }
  '';
  buildInputs = with pkgs; [
      glibc.out
      glibc.static

      go
      gotools
      #gotools.bin
      #gocode.bin
      #godef godef.bin
      godep
      #godep.bin
      gox.bin
      #ginkgo ginkgo.bin
      #gomega
      ( import ./vim-go.nix { pkgs=gitpkgs; commonRC=commonVimRC; } )
#      ( import ./neovim-go.nix { pkgs=gitpkgs; commonRC=commonVimRC; } )
  ];

in pkgs.stdenv.mkDerivation {
  inherit name;
  buildInputs = extraBuildInputs ++ buildInputs;
  shellHook = ''
    goname=${go.version}_$name
    setPS1 $goname
    export GOROOT=${go}/share/go
    export GOPATH="$HOME/.gopath_$goname"
    export PATH="$HOME/.gopath_$goname/bin:$PATH"
    unset name
    unset SSL_CERT_FILE

    go get -u github.com/Masterminds/glide
    go get -u github.com/sgotti/glide-vc
    go get -u github.com/alecthomas/gometalinter
    go get -u github.com/golang/lint/golint
    go get -u github.com/rogpeppe/godef
    go get -u github.com/kisielk/errcheck
    go get -u github.com/jstemmer/gotags
    go get -u github.com/klauspost/asmfmt/cmd/asmfmt
    go get -u github.com/nsf/gocode
    ${extraShellHook}
  '';
}