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|
{- git-annex command
-
- Copyright 2014-2016 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Command.MetaData where
import Command
import Annex.MetaData
import Logs.MetaData
import Messages.JSON (ParsedJSON(..))
import qualified Data.Set as S
import qualified Data.Text as T
import qualified Data.ByteString.Lazy.UTF8 as BU
import Data.Time.Clock.POSIX
import Data.Aeson
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 | GetAll | Set [ModMeta]
optParser :: CmdParamsDesc -> Parser MetaDataOptions
optParser desc = MetaDataOptions
<$> cmdParams desc
<*> ((Get <$> getopt) <|> (Set <$> some modopts) <|> pure GetAll)
<*> optional (parseKeyOptions False)
where
getopt = option (eitherReader mkMetaField)
( long "get" <> short 'g' <> metavar paramField
<> help "get single metadata field"
)
modopts = option (eitherReader parseModMeta)
( long "set" <> short 's' <> metavar "FIELD[+-]=VALUE"
<> help "set or unset metadata value"
)
<|> (AddMeta tagMetaField . toMetaValue <$> strOption
( long "tag" <> short 't' <> metavar "TAG"
<> help "set a tag"
))
<|> (DelMeta tagMetaField . Just . toMetaValue <$> strOption
( long "untag" <> short 'u' <> metavar "TAG"
<> help "remove a tag"
))
<|> option (eitherReader (\f -> DelMeta <$> mkMetaField f <*> pure Nothing))
( long "remove" <> short 'r' <> metavar "FIELD"
<> help "remove all values of a field"
)
seek :: MetaDataOptions -> CommandSeek
seek o = do
now <- liftIO getPOSIXTime
let seeker = case getSet o of
Get _ -> withFilesInGit
GetAll -> withFilesInGit
Set _ -> withFilesInGitNonRecursive
"Not recursively setting metadata. Use --force to do that."
withKeyOptions (keyOptions o) False
(startKeys now o)
(seeker $ whenAnnexed $ start now o)
(forFiles o)
start :: POSIXTime -> MetaDataOptions -> FilePath -> Key -> CommandStart
start now o file k = startKeys now o k (mkActionItem afile)
where
afile = Just file
startKeys :: POSIXTime -> MetaDataOptions -> Key -> ActionItem -> CommandStart
startKeys now o k ai = case getSet o of
Get f -> do
l <- S.toList . currentMetaDataValues f <$> getCurrentMetaData k
liftIO $ forM_ l $
putStrLn . fromMetaValue
stop
_ -> do
showStart' "metadata" k ai
next $ perform now o k
perform :: POSIXTime -> MetaDataOptions -> Key -> CommandPerform
perform now o k = case getSet o of
Set ms -> do
oldm <- getCurrentMetaData k
let m = combineMetaData $ map (modMeta oldm) ms
addMetaData' k m now
next $ cleanup k
_ -> next $ cleanup k
cleanup :: Key -> CommandCleanup
cleanup k = do
m <- getCurrentMetaData k
let Object o = toJSON (MetaDataFields m)
maybeShowJSON $ AesonObject o
showLongNote $ unlines $ concatMap showmeta $
map unwrapmeta (fromMetaData m)
return True
where
unwrapmeta (f, v) = (fromMetaField f, map fromMetaValue (S.toList v))
showmeta (f, vs) = map ((f ++ "=") ++) vs
-- Metadata serialized to JSON in the field named "fields" of
-- a larger object.
newtype MetaDataFields = MetaDataFields MetaData
deriving (Show)
instance ToJSON MetaDataFields where
toJSON (MetaDataFields m) = object [ (fieldsField, toJSON m) ]
instance FromJSON MetaDataFields where
parseJSON (Object v) = do
f <- v .: fieldsField
case f of
Nothing -> return (MetaDataFields emptyMetaData)
Just v' -> MetaDataFields <$> parseJSON v'
parseJSON _ = fail "expected an object"
fieldsField :: T.Text
fieldsField = T.pack "fields"
parseJSONInput :: String -> Maybe (Either FilePath Key, MetaData)
parseJSONInput i = do
v <- decode (BU.fromString i)
case parsedAdded v of
Nothing -> return (parsedKeyfile v, emptyMetaData)
Just (MetaDataFields m) -> return (parsedKeyfile v, m)
|
