ctrlp migemo matcher

function! MigemoMatch(items, str, limit, mmode, ispath, crfile, regex)
  if has('migmeo')
    let tmp = tempname()
    try
      if a:str =~ '^\s*$'
        return a:items
      endif
      call writefile(split(iconv(join(a:items, "\n"), &encoding, 'utf-8'), "\n"), tmp)
      return split(iconv(system(
      \  printf('migemogrep %s %s',
      \    shellescape(a:str),
      \    shellescape(tmp))), 'utf-8', &encoding), "\n")
    catch
      return []
    finally
      call delete(tmp)
    endtry
  else
    try
      if a:str =~ '^\s*$'
        return copy(a:items)
      endif
      let migemoed_str = migemo(a:str)
      let new_items = filter(copy(a:items), 'match(v:val, migemoed_str) >= 0')
      if ! empty(new_items)
        return new_items
      else
        return []
      endif
    catch
        return copy(a:items)
    endtry
  endif
endfunction
function! SetMigemoMatcher()
  let g:ctrlp_match_func = {'match' : 'MigemoMatch' }
endfunction
function! SetMigemoMatcher()
  let g:ctrlp_match_func = {}
endfunction
command! CtrlPSetMigemoMatcher call SetMigemoMatcher()
command! CtrlPSetDefaultMatcher call SetDefaultMatcher()