function! MyTabLine()
  let s = ''
  for i in range(tabpagenr('$'))
    let buflist = tabpagebuflist(i+1)
    let winnr = tabpagewinnr(i+1)
    let bufname = bufname(buflist[winnr-1])
    if bufname =~ '^fugitive://'
      let tabname = 'Git'
    else
      let tabname = fnamemodify(bufname, ':t')
      if tabname == ''
        let tabname = '[No Name]'
      endif
    endif
    let s .= '%' . (i+1) . 'T'
    let s .= (i+1 == tabpagenr() ? '%#TabLineSel#' : '%#TabLine#')
    let s .= ' ' . tabname . ' '
  endfor
  let s .= '%#TabLineFill#%T'
  return s
endfunction

set tabline=%!MyTabLine()