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|
{- git-annex command
-
- Copyright 2014 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Command.MetaData where
import Common.Annex
import Command
import Annex.MetaData
import Logs.MetaData
import qualified Data.Set as S
import Data.Time.Clock.POSIX
cmd :: Command
cmd = withGlobalOptions ([jsonOption] ++ annexedMatchingOptions) $
command "metadata" SectionMetaData
"sets or gets metadata of a file"
paramPaths (seek <$$> optParser)
data MetaDataOptions = MetaDataOptions
{ forFiles :: CmdParams
, getSet :: GetSet
, keyOptions :: Maybe KeyOptions
}
data GetSet = Get MetaField | Set [ModMeta]
optParser :: CmdParamsDesc -> Parser MetaDataOptions
optParser desc = MetaDataOptions
<$> cmdParams desc
<*> ((Get <$> getopt) <|> (Set <$> many modopts))
<*> optional (parseKeyOptions False)
where
getopt = option (eitherReader mkMetaField)
( long "get" <> short 'g' <> metavar paramField
<> help "get single metadata field"
)
modopts = option (eitherReader parseModMeta)
( long "set" <> short 's' <> metavar "FIELD[+-]=VALUE"
<> help "set or unset metadata value"
)
<|> (AddMeta tagMetaField . toMetaValue <$> strOption
( long "tag" <> short 't' <> metavar "TAG"
<> help "set a tag"
))
<|> (AddMeta tagMetaField . mkMetaValue (CurrentlySet False) <$> strOption
( long "untag" <> short 'u' <> metavar "TAG"
<> help "remove a tag"
))
seek :: MetaDataOptions -> CommandSeek
seek o = do
now <- liftIO getPOSIXTime
let seeker = case getSet o of
Get _ -> withFilesInGit
Set _ -> withFilesInGitNonRecursive
withKeyOptions (keyOptions o) False
(startKeys now o)
(seeker $ whenAnnexed $ start now o)
(forFiles o)
start :: POSIXTime -> MetaDataOptions -> FilePath -> Key -> CommandStart
start now o file = start' (Just file) now o
startKeys :: POSIXTime -> MetaDataOptions -> Key -> CommandStart
startKeys = start' Nothing
start' :: AssociatedFile -> POSIXTime -> MetaDataOptions -> Key -> CommandStart
start' afile now o k = case getSet o of
Set ms -> do
showStart' "metadata" k afile
next $ perform now ms k
Get f -> 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 = combineMetaData $ 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
|
