init.vim

augroup startup
  autocmd!
  autocmd VimEnter * call PreventNestedNeovim()
augroup END

function! PreventNestedNeovim()
  if !empty($NVIM_LISTEN_ADDRESS) && $NVIM_LISTEN_ADDRESS !=# v:servername
    let g:r=sockconnect('pipe', $NVIM_LISTEN_ADDRESS, {'rpc':v:true})
    let g:f=fnameescape(expand('%:p'))
    noautocmd bwipe
    if empty(g:f)
      call rpcrequest(g:r, "nvim_command", "enew ")
    else
      call rpcrequest(g:r, "nvim_command", "edit ".g:f)
    endif
    qall
  endif
endfunction