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|
{- git-annex command
-
- Copyright 2011 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
{-# LANGUAGE BangPatterns #-}
module Command.Status where
import Control.Monad.State.Strict
import qualified Data.Map as M
import Text.JSON
import Common.Annex
import qualified Types.Backend as B
import qualified Types.Remote as R
import qualified Remote
import qualified Command.Unused
import qualified Git
import qualified Annex
import Command
import Utility.DataUnits
import Annex.Content
import Types.Key
import Backend
import Logs.UUID
import Logs.Trust
import Remote
-- a named computation that produces a statistic
type Stat = StatState (Maybe (String, StatState String))
-- data about a set of keys
data KeyData = KeyData
{ countKeys :: Integer
, sizeKeys :: Integer
, unknownSizeKeys :: Integer
, backendsKeys :: M.Map String Integer
}
-- cached info that multiple Stats use
data StatInfo = StatInfo
{ presentData :: Maybe KeyData
, referencedData :: Maybe KeyData
}
-- a state monad for running Stats in
type StatState = StateT StatInfo Annex
def :: [Command]
def = [command "status" paramNothing seek
"shows status information about the annex"]
seek :: [CommandSeek]
seek = [withNothing start]
{- Order is significant. Less expensive operations, and operations
- that share data go together.
-}
fast_stats :: [Stat]
fast_stats =
[ supported_backends
, supported_remote_types
, remote_list Trusted "trusted"
, remote_list SemiTrusted "semitrusted"
, remote_list UnTrusted "untrusted"
, remote_list DeadTrusted "dead"
]
slow_stats :: [Stat]
slow_stats =
[ tmp_size
, bad_data_size
, local_annex_keys
, local_annex_size
, known_annex_keys
, known_annex_size
, backend_usage
]
start :: CommandStart
start = do
fast <- Annex.getState Annex.fast
let stats = if fast then fast_stats else fast_stats ++ slow_stats
showCustom "status" $ do
evalStateT (mapM_ showStat stats) (StatInfo Nothing Nothing)
return True
stop
stat :: String -> (String -> StatState String) -> Stat
stat desc a = return $ Just (desc, a desc)
nostat :: Stat
nostat = return Nothing
json :: JSON j => (j -> String) -> StatState j -> String -> StatState String
json serialize a desc = do
j <- a
lift $ maybeShowJSON [(desc, j)]
return $ serialize j
nojson :: StatState String -> String -> StatState String
nojson a _ = a
showStat :: Stat -> StatState ()
showStat s = calc =<< s
where
calc (Just (desc, a)) = do
(lift . showHeader) desc
lift . showRaw =<< a
calc Nothing = return ()
supported_backends :: Stat
supported_backends = stat "supported backends" $ json unwords $
return $ map B.name Backend.list
supported_remote_types :: Stat
supported_remote_types = stat "supported remote types" $ json unwords $
return $ map R.typename Remote.remoteTypes
remote_list :: TrustLevel -> String -> Stat
remote_list level desc = stat n $ nojson $ lift $ do
us <- M.keys <$> (M.union <$> uuidMap <*> remoteMap Remote.name)
rs <- fst <$> trustPartition level us
s <- prettyPrintUUIDs n rs
return $ if null s then "0" else show (length rs) ++ "\n" ++ beginning s
where
n = desc ++ " repositories"
local_annex_size :: Stat
local_annex_size = stat "local annex size" $ json id $
showSizeKeys <$> cachedPresentData
local_annex_keys :: Stat
local_annex_keys = stat "local annex keys" $ json show $
countKeys <$> cachedPresentData
known_annex_size :: Stat
known_annex_size = stat "known annex size" $ json id $
showSizeKeys <$> cachedReferencedData
known_annex_keys :: Stat
known_annex_keys = stat "known annex keys" $ json show $
countKeys <$> cachedReferencedData
tmp_size :: Stat
tmp_size = staleSize "temporary directory size" gitAnnexTmpDir
bad_data_size :: Stat
bad_data_size = staleSize "bad keys size" gitAnnexBadDir
backend_usage :: Stat
backend_usage = stat "backend usage" $ nojson $
calc
<$> (backendsKeys <$> cachedReferencedData)
<*> (backendsKeys <$> cachedPresentData)
where
calc a b = pp "" $ reverse . sort $ map swap $ M.toList $ M.unionWith (+) a b
pp c [] = c
pp c ((n, b):xs) = "\n\t" ++ b ++ ": " ++ show n ++ pp c xs
swap (a, b) = (b, a)
cachedPresentData :: StatState KeyData
cachedPresentData = do
s <- get
case presentData s of
Just v -> return v
Nothing -> do
v <- foldKeys <$> lift getKeysPresent
put s { presentData = Just v }
return v
cachedReferencedData :: StatState KeyData
cachedReferencedData = do
s <- get
case referencedData s of
Just v -> return v
Nothing -> do
!v <- lift $ Command.Unused.withKeysReferenced
emptyKeyData addKey
put s { referencedData = Just v }
return v
emptyKeyData :: KeyData
emptyKeyData = KeyData 0 0 0 M.empty
foldKeys :: [Key] -> KeyData
foldKeys = foldl' (flip addKey) emptyKeyData
addKey :: Key -> KeyData -> KeyData
addKey key (KeyData count size unknownsize backends) =
KeyData count' size' unknownsize' backends'
where
{- All calculations strict to avoid thunks when repeatedly
- applied to many keys. -}
!count' = count + 1
!backends' = M.insertWith' (+) (keyBackendName key) 1 backends
!size' = maybe size (+ size) ks
!unknownsize' = maybe (unknownsize + 1) (const unknownsize) ks
ks = keySize key
showSizeKeys :: KeyData -> String
showSizeKeys d = total ++ missingnote
where
total = roughSize storageUnits False $ sizeKeys d
missingnote
| unknownSizeKeys d == 0 = ""
| otherwise = aside $
"+ " ++ show (unknownSizeKeys d) ++
" keys of unknown size"
staleSize :: String -> (Git.Repo -> FilePath) -> Stat
staleSize label dirspec = do
keys <- lift (Command.Unused.staleKeys dirspec)
if null keys
then nostat
else stat label $ json (++ aside "clean up with git-annex unused") $
return $ showSizeKeys $ foldKeys keys
aside :: String -> String
aside s = " (" ++ s ++ ")"
|
