-{- | Convert newline and delimiter-separated text.
-
-This function converts a text in tabular format as generated by
-@gnt-instance list@ and @gnt-node list@ to a list of objects using a
-supplied conversion function.
-
--}
-loadTabular :: (Monad m) => String -> ([String] -> m (String, a))
- -> (a -> Int -> a) -> m ([(String, Int)], [(Int, a)])
-loadTabular text_data convert_fn set_fn = do
- let lines_data = lines text_data
- rows = map (sepSplit '|') lines_data
- kerows <- mapM convert_fn rows
- let idxrows = map (\ (idx, (k, v)) -> ((k, idx), (idx, set_fn v idx)))
- (zip [0..] kerows)
- return $ unzip idxrows
-
--- | For each instance, add its index to its primary and secondary nodes
-fixNodes :: [(Int, Node.Node)]
- -> [(Int, Instance.Instance)]
- -> [(Int, Node.Node)]
-fixNodes nl il =
- foldl' (\accu (idx, inst) ->
- let
- assocEqual = (\ (i, _) (j, _) -> i == j)
- pdx = Instance.pnode inst
- sdx = Instance.snode inst
- pold = fromJust $ lookup pdx accu
- sold = fromJust $ lookup sdx accu
- pnew = Node.setPri pold idx
- snew = Node.setSec sold idx
- ac1 = deleteBy assocEqual (pdx, pold) accu
- ac2 = deleteBy assocEqual (sdx, sold) ac1
- ac3 = (pdx, pnew):(sdx, snew):ac2
- in ac3) nl il
-
--- | Compute the longest common suffix of a NameList list that
--- | starts with a dot
-longestDomain :: NameList -> String
-longestDomain [] = ""
-longestDomain ((_,x):xs) =
- let
- onlyStrings = snd $ unzip xs
- in
- foldr (\ suffix accu -> if all (isSuffixOf suffix) onlyStrings
- then suffix
- else accu)
- "" $ filter (isPrefixOf ".") (tails x)
-
--- | Remove tails from the (Int, String) lists
-stripSuffix :: String -> NameList -> NameList
-stripSuffix suffix lst =
- let sflen = length suffix in
- map (\ (key, name) -> (key, take ((length name) - sflen) name)) lst
-
--- | Safe 'read' function returning data encapsulated in a Result
-tryRead :: (Monad m, Read a) => String -> String -> m a
-tryRead name s =
- let sols = readsPrec 0 s
- in case sols of
- (v, ""):[] -> return v
- (_, e):[] -> fail $ name ++ ": leftover characters when parsing '"
- ++ s ++ "': '" ++ e ++ "'"
- _ -> fail $ name ++ ": cannot parse string '" ++ s ++ "'"
-
--- | Lookups a node into an assoc list
-lookupNode :: (Monad m) => String -> String -> [(String, Int)] -> m Int
-lookupNode node inst ktn =
- case lookup node ktn of
- Nothing -> fail $ "Unknown node '" ++ node ++ "' for instance " ++ inst
- Just idx -> return idx
-
--- | Load a node from a field list
-loadNode :: (Monad m) => [String] -> m (String, Node.Node)
-loadNode (name:tm:nm:fm:td:fd:fo:[]) = do
- new_node <-
- if any (== "?") [tm,nm,fm,td,fd] || fo == "Y" then
- return $ Node.create 0 0 0 0 0 True
- else do
- vtm <- tryRead name tm
- vnm <- tryRead name nm
- vfm <- tryRead name fm
- vtd <- tryRead name td
- vfd <- tryRead name fd
- return $ Node.create vtm vnm vfm vtd vfd False
- return (name, new_node)
-loadNode s = fail $ "Invalid/incomplete node data: '" ++ (show s) ++ "'"
-
--- | Load an instance from a field list
-loadInst :: (Monad m) =>
- [(String, Int)] -> [String] -> m (String, Instance.Instance)
-loadInst ktn (name:mem:dsk:status:pnode:snode:[]) = do
- pidx <- lookupNode pnode name ktn
- sidx <- lookupNode snode name ktn
- vmem <- tryRead name mem
- vdsk <- tryRead name dsk
- when (sidx == pidx) $ fail $ "Instance " ++ name ++
- " has same primary and secondary node - " ++ pnode
- let newinst = Instance.create vmem vdsk status pidx sidx
- return (name, newinst)
-loadInst _ s = fail $ "Invalid/incomplete instance data: '" ++ (show s) ++ "'"
-
-{-| Initializer function that loads the data from a node and list file
- and massages it into the correct format. -}
-loadData :: String -- ^ Node data in text format
- -> String -- ^ Instance data in text format
- -> Result (Container.Container Node.Node,
- Container.Container Instance.Instance,
- String, NameList, NameList)
-loadData ndata idata = do
- {- node file: name t_mem n_mem f_mem t_disk f_disk -}
- (ktn, nl) <- loadTabular ndata loadNode Node.setIdx
- {- instance file: name mem disk status pnode snode -}
- (kti, il) <- loadTabular idata (loadInst ktn) Instance.setIdx
- let
- nl2 = fixNodes nl il
- il3 = Container.fromAssocList il
- nl3 = Container.fromAssocList
- (map (\ (k, v) -> (k, Node.buildPeers v il3 (length nl2))) nl2)
- xtn = swapPairs ktn
- xti = swapPairs kti
- common_suffix = longestDomain (xti ++ xtn)
- stn = stripSuffix common_suffix xtn
- sti = stripSuffix common_suffix xti
- return (nl3, il3, common_suffix, stn, sti)
-
projects / ganeti-local / blobdiff