Close duplicate tabs and show hidden buffers in tabs.

reorganaizetabs.vim

function! ReorganizeTabs(only)
    let tablists = []
    let bufs = {}

    tabfirst
    let tabnr = 1

    while type(tabpagebuflist(tabnr)) == type([])
	let tablist = tabpagebuflist(tabnr)

	if a:only && len(tablist) > 1
	    execute "normal! 999\<C-w>k"
	    only
	endif

	if !empty(filter(copy(tablists), 'v:val == ' . string(tablist)))
	    tabclose
	    continue
	endif

	call add(tablists, tablist)

	for i in tablist
	    let bufs[i] = 1
	endfor

	tabnext
	let tabnr += 1
    endwhile

    tablast

    for n in range(1, bufnr('$'))
	if get(bufs, n, 0) || !buflisted(n)
	    continue
	endif

	tab split
	execute 'buffer ' . n
    endfor

    tabfirst
endfunction