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|
{- git-annex metadata
-
- Copyright 2014-2016 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Annex.MetaData (
genMetaData,
dateMetaData,
parseModMeta,
parseMetaDataMatcher,
module X
) where
import Annex.Common
import qualified Annex
import Types.MetaData as X
import Annex.MetaData.StandardFields as X
import Logs.MetaData
import Annex.CatFile
import Utility.Glob
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 the index.
-
- Also, can generate new metadata, if configured to do so.
-}
genMetaData :: Key -> FilePath -> FileStatus -> Annex ()
genMetaData key file status = do
maybe noop (`copyMetaData` key) =<< catKeyFileHEAD file
whenM (annexGenMetaData <$> Annex.getGitConfig) $ do
curr <- getCurrentMetaData key
addMetaData key (dateMetaData mtime curr)
where
mtime = posixSecondsToUTCTime $ realToFrac $ modificationTime status
{- Generates metadata for a file's date stamp.
- Does not overwrite any existing metadata values. -}
dateMetaData :: UTCTime -> MetaData -> MetaData
dateMetaData mtime 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 mtime
{- Parses field=value, field+=value, field-=value, field?=value -}
parseModMeta :: String -> Either String ModMeta
parseModMeta p = case lastMaybe f of
Just '+' -> AddMeta <$> mkMetaField f' <*> v
Just '-' -> DelMeta <$> mkMetaField f' <*> (Just <$> v)
Just '?' -> MaybeSetMeta <$> mkMetaField f' <*> v
_ -> SetMeta <$> mkMetaField f <*> v
where
(f, sv) = separate (== '=') p
f' = beginning f
v = pure (toMetaValue sv)
{- Parses field=value, field<value, field<=value, field>value, field>=value -}
parseMetaDataMatcher :: String -> Either String (MetaField, MetaValue -> Bool)
parseMetaDataMatcher p = (,)
<$> mkMetaField f
<*> pure matcher
where
(f, op_v) = break (`elem` "=<>") p
matcher = case op_v of
('=':v) -> checkglob v
('<':'=':v) -> checkcmp (<=) v
('<':v) -> checkcmp (<) v
('>':'=':v) -> checkcmp (>=) v
('>':v) -> checkcmp (>) v
_ -> checkglob ""
checkglob v =
let cglob = compileGlob v CaseInsensative
in matchGlob cglob . fromMetaValue
checkcmp cmp v v' = case (doubleval v, doubleval (fromMetaValue v')) of
(Just d, Just d') -> d' `cmp` d
_ -> False
doubleval v = readish v :: Maybe Double
|
