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{- git-annex metadata
-
- Copyright 2014 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Annex.MetaData (
genMetaData,
module X
) where
import Common.Annex
import qualified Annex
import Types.MetaData as X
import Annex.MetaData.StandardFields as X
import Logs.MetaData
import Annex.CatFile
import qualified Data.Set as S
import qualified Data.Map as M
import Data.Time.Calendar
import Data.Time.Clock
import Data.Time.Clock.POSIX
{- Adds metadata for a file that has just been ingested into the
- annex, but has not yet been committed to git.
-
- When the file has been modified, the metadata is copied over
- from the old key to the new key. Note that it looks at the old key as
- committed to HEAD -- the new key may or may not have already been staged
- in th annex.
-
- Also, can generate new metadata, if configured to do so.
-}
genMetaData :: Key -> FilePath -> FileStatus -> Annex ()
genMetaData key file status = do
maybe noop (flip copyMetaData key) =<< catKeyFileHEAD file
whenM (annexGenMetaData <$> Annex.getGitConfig) $ do
metadata <- getCurrentMetaData key
let metadata' = genMetaData' status metadata
unless (metadata' == emptyMetaData) $
addMetaData key metadata'
{- Generates metadata from the FileStatus.
- Does not overwrite any existing metadata values. -}
genMetaData' :: FileStatus -> MetaData -> MetaData
genMetaData' status old = MetaData $ M.fromList $ filter isnew
[ (yearMetaField, S.singleton $ toMetaValue $ show y)
, (monthMetaField, S.singleton $ toMetaValue $ show m)
]
where
isnew (f, _) = S.null (currentMetaDataValues f old)
(y, m, _d) = toGregorian $ utctDay $
posixSecondsToUTCTime $ realToFrac $
modificationTime status
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