kiwi.vim

augroup Kiwi
  au!
  autocmd BufNewFile,BufRead *Spec.m,*Spec.mm set foldmethod=expr foldexpr=KiwiFoldLevel(v:lnum)
augroup END

function! KiwiFoldLevel(lnum)
  let line=getline(a:lnum)
  if line=~'^\s\s*\(context\|describe\|it\)\s*('
    return ">" . (indent(a:lnum) / (&sts ? &sts : &ts))
  elseif line=~'^\s\s*});\s*$' && getline(a:lnum+1)!~'^\s*$'
    return "<" . (indent(a:lnum) / (&sts ? &sts : &ts))
  elseif line=~'^\s*$' && getline(a:lnum-1)=~'^\s\s*});\s*$'
    return "<" . (indent(a:lnum-1) / (&sts ? &sts : &ts))
  elseif line=~'{{'.'{[0-9][0-9]*'
    return ">" . substitute(line, '^.*{{'.'{\([0-9]*\).*$', '\1', '')
  elseif line=~('{{'.'{')
    return 'a1'
  elseif line=~'[0-9][0-9]*}'.'}}'
    return "<" . substitute(line, '^.*\([0-9][0-9]*\)}'.'}}.*$', '\1', '')
  elseif line=~'}'.'}}'
    return 's1'
  else
    return '='
  endif
endfunction