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|
{- git-annex assistant change tracking
-
- Copyright 2012 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Assistant.Changes where
import Common.Annex
import qualified Annex.Queue
import Types.KeySource
import Utility.TSet
import Data.Time.Clock
data ChangeType = AddChange | LinkChange | RmChange | RmDirChange
deriving (Show, Eq)
type ChangeChan = TSet Change
data Change
= Change
{ changeTime :: UTCTime
, changeFile :: FilePath
, changeType :: ChangeType
}
| PendingAddChange
{ changeTime ::UTCTime
, changeFile :: FilePath
}
| InProcessAddChange
{ changeTime ::UTCTime
, keySource :: KeySource
}
deriving (Show)
newChangeChan :: IO ChangeChan
newChangeChan = newTSet
{- Handlers call this when they made a change that needs to get committed. -}
madeChange :: FilePath -> ChangeType -> Annex (Maybe Change)
madeChange f t = do
-- Just in case the commit thread is not flushing the queue fast enough.
Annex.Queue.flushWhenFull
liftIO $ Just <$> (Change <$> getCurrentTime <*> pure f <*> pure t)
noChange :: Annex (Maybe Change)
noChange = return Nothing
{- Indicates an add needs to be done, but has not started yet. -}
pendingAddChange :: FilePath -> Annex (Maybe Change)
pendingAddChange f =
liftIO $ Just <$> (PendingAddChange <$> getCurrentTime <*> pure f)
isPendingAddChange :: Change -> Bool
isPendingAddChange (PendingAddChange {}) = True
isPendingAddChange _ = False
isInProcessAddChange :: Change -> Bool
isInProcessAddChange (InProcessAddChange {}) = True
isInProcessAddChange _ = False
finishedChange :: Change -> Change
finishedChange c@(InProcessAddChange { keySource = ks }) = Change
{ changeTime = changeTime c
, changeFile = keyFilename ks
, changeType = AddChange
}
finishedChange c = c
{- Gets all unhandled changes.
- Blocks until at least one change is made. -}
getChanges :: ChangeChan -> IO [Change]
getChanges = getTSet
{- Puts unhandled changes back into the channel.
- Note: Original order is not preserved. -}
refillChanges :: ChangeChan -> [Change] -> IO ()
refillChanges = putTSet
{- Records a change in the channel. -}
recordChange :: ChangeChan -> Change -> IO ()
recordChange = putTSet1
|
