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{- git-annex command
-
- Copyright 2014 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Command.MetaData where
import Common.Annex
import qualified Annex
import Command
import Annex.MetaData
import Logs.MetaData
import Types.MetaData
import qualified Data.Set as S
import Data.Time.Clock.POSIX
def :: [Command]
def = [withOptions [setOption, tagOption, untagOption, getOption, jsonOption] $
command "metadata" paramPaths seek
SectionMetaData "sets metadata of a file"]
storeModMeta :: ModMeta -> Annex ()
storeModMeta modmeta = Annex.changeState $
\s -> s { Annex.modmeta = modmeta:Annex.modmeta s }
setOption :: Option
setOption = Option ['s'] ["set"] (ReqArg mkmod "FIELD[+-]=VALUE") "set metadata"
where
mkmod = either error storeModMeta . parseModMeta
getOption :: Option
getOption = fieldOption ['g'] "get" paramField "get single metadata field"
tagOption :: Option
tagOption = Option ['t'] ["tag"] (ReqArg mkmod "TAG") "set a tag"
where
mkmod = storeModMeta . AddMeta tagMetaField . toMetaValue
untagOption :: Option
untagOption = Option ['u'] ["untag"] (ReqArg mkmod "TAG") "remove a tag"
where
mkmod = storeModMeta . AddMeta tagMetaField . mkMetaValue (CurrentlySet False)
seek :: CommandSeek
seek ps = do
modmeta <- Annex.getState Annex.modmeta
getfield <- getOptionField getOption $ \ms ->
return $ either error id . mkMetaField <$> ms
now <- liftIO getPOSIXTime
withFilesInGit (whenAnnexed $ start now getfield modmeta) ps
start :: POSIXTime -> Maybe MetaField -> [ModMeta] -> FilePath -> (Key, Backend) -> CommandStart
start now Nothing ms file (k, _) = do
showStart "metadata" file
next $ perform now ms k
start _ (Just f) _ _ (k, _) = do
l <- S.toList . currentMetaDataValues f <$> getCurrentMetaData k
liftIO $ forM_ l $
putStrLn . fromMetaValue
stop
perform :: POSIXTime -> [ModMeta] -> Key -> CommandPerform
perform _ [] k = next $ cleanup k
perform now ms k = do
oldm <- getCurrentMetaData k
let m = foldl' unionMetaData emptyMetaData $ map (modMeta oldm) ms
addMetaData' k m now
next $ cleanup k
cleanup :: Key -> CommandCleanup
cleanup k = do
l <- map unwrapmeta . fromMetaData <$> getCurrentMetaData k
maybeShowJSON l
showLongNote $ unlines $ concatMap showmeta l
return True
where
unwrapmeta (f, v) = (fromMetaField f, map fromMetaValue (S.toList v))
showmeta (f, vs) = map ((f ++ "=") ++) vs
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