gistfile1.vim

" Highlight currently open file in nerdtree
" see http://superuser.com/a/474298/175466
" see http://superuser.com/a/509721/175466

" returns true iff is NERDTree open/active
function! rc:isNTOpen()
  return exists("t:NERDTreeBufName") && (bufwinnr(t:NERDTreeBufName) != -1)
endfunction

" returns true iff focused window is NERDTree window
function! rc:isNTFocused()
  return -1 != match(expand('%'), 'NERD_Tree') 
endfunction

" returns true iff focused window contains a file in current pwd
function! rc:isInsideCwd()
  return -1 != stridx(expand('%:p'), getcwd())
endfunction


" calls NERDTreeFind iff NERDTree is active, current window contains a modifiable file, and we're not in vimdiff
function! rc:syncTree()
  if &modifiable && rc:isNTOpen() && !rc:isNTFocused() && strlen(expand('%')) > 0 && !&diff && rc:isInsideCwd()
    NERDTreeFind
    wincmd p
  endif
endfunction

autocmd BufEnter * call rc:syncTree()

Exactly what i am looking for, thank you

which directory do you put this file in?

doesnt work when i put ut in
/Users//.local/share/nvim

@Amarlanda This snippet can go into your normal vim config. For neovim, this is ~/.config/nvim/init.vim by default. Just paste the file contents at the end of init.vim.