Revision bf7ee7ad

b/src/Ganeti/Utils.hs
58 58 
  , splitEithers
59 59 
  , recombineEithers
60 60 
  , resolveAddr
61 
  , monadicThe
61 62 
  , setOwnerAndGroupFromNames
62 63 
  , formatOrdinal
63 64 
  , atomicWriteFile
......
423 424 
exitIfEmpty _ (x:_) = return x
424 425 
exitIfEmpty s []    = exitErr s
425 426 

  		





  
  427
  
    
-- | Obtain the unique element of a list in an arbitrary monad.


  		





  
  428
  
    
monadicThe :: (Eq a, Monad m) => String -> [a] -> m a


  		





  
  429
  
    
monadicThe s [] = fail s


  		





  
  430
  
    
monadicThe s (x:xs)


  		





  
  431
  
    
  | all (x ==) xs = return x


  		





  
  432
  
    
  | otherwise = fail s


  		





  
  433
  
    

  		





  426
  434
  
    
-- | Split an 'Either' list into two separate lists (containing the


  		





  427
  435
  
    
-- 'Left' and 'Right' elements, plus a \"trail\" list that allows


  		





  428
  436
  
    
-- recombination later.


  		












Also available in:
  Unified diff