c91929f693
Just more golfing.. I am pretty sure something in a library somewhere can do this, but I have been unable to find it.
49 lines
1.2 KiB
Haskell
49 lines
1.2 KiB
Haskell
{- git-annex command
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-
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- Copyright 2010 Joey Hess <joey@kitenet.net>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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module Command.Drop where
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import Command
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import qualified Backend
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import LocationLog
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import Types
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import Content
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import Messages
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import Utility
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command :: [Command]
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command = [repoCommand "drop" paramPath seek
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"indicate content of files not currently wanted"]
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seek :: [CommandSeek]
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seek = [withAttrFilesInGit "annex.numcopies" start]
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{- Indicates a file's content is not wanted anymore, and should be removed
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- if it's safe to do so. -}
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start :: CommandStartAttrFile
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start (file, attr) = isAnnexed file $ \(key, backend) -> do
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inbackend <- Backend.hasKey key
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if inbackend
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then do
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showStart "drop" file
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next $ perform key backend numcopies
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else stop
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where
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numcopies = readMaybe attr :: Maybe Int
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perform :: Key -> Backend Annex -> Maybe Int -> CommandPerform
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perform key backend numcopies = do
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success <- Backend.removeKey backend key numcopies
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if success
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then next $ cleanup key
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else stop
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cleanup :: Key -> CommandCleanup
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cleanup key = do
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whenM (inAnnex key) $ removeAnnex key
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logStatus key ValueMissing
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return True
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