52 lines
1.2 KiB
Haskell
52 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 Control.Monad (when)
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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 Core
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import Messages
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import Utility
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command :: [Command]
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command = [Command "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 not inbackend
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then return Nothing
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else do
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showStart "drop" file
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return $ Just $ perform key backend numcopies
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where
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numcopies = readMaybe attr :: Maybe Int
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perform :: Key -> Backend -> 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 return $ Just $ cleanup key
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else return Nothing
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cleanup :: Key -> CommandCleanup
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cleanup key = do
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inannex <- inAnnex key
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when inannex $ removeAnnex key
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logStatus key ValueMissing
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return True
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