ftplugin/ruby.vim

ruby.vim

" Replace 2 space-indents to tabs on open
" and switch them back on close


function SpacesToTabs()
	set ts=4
	set sw=4
	set sts=0
	set noexpandtab

	try
		%s@^\v(%( {2})+)@\=repeat("\t", len(submatch(1))/2)@
	catch
	finally
		1
	endtry
endfunction

function TabsToSpaces()
	set ts=2
	set sw=2
	set sts=0
	set expandtab

	retab
endfunction


autocmd BufEnter * call SpacesToTabs()
autocmd BufWritePre * call TabsToSpaces()
autocmd BufWritePost * call SpacesToTabs()