101 lines
3.2 KiB
Haskell
101 lines
3.2 KiB
Haskell
{- git-annex metadata
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-
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- Copyright 2014-2016 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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module Annex.MetaData (
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genMetaData,
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dateMetaData,
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parseModMeta,
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parseMetaDataMatcher,
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module X
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) where
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import Annex.Common
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import qualified Annex
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import Types.MetaData as X
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import Annex.MetaData.StandardFields as X
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import Logs.MetaData
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import Annex.CatFile
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import Utility.Glob
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import qualified Data.Set as S
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import qualified Data.Map as M
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import Data.Time.Calendar
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import Data.Time.Clock
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import Data.Time.Clock.POSIX
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{- Adds metadata for a file that has just been ingested into the
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- annex, but has not yet been committed to git.
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-
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- When the file has been modified, the metadata is copied over
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- from the old key to the new key. Note that it looks at the old key as
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- committed to HEAD -- the new key may or may not have already been staged
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- in the index.
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-
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- Also, can generate new metadata, if configured to do so.
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-}
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genMetaData :: Key -> FilePath -> FileStatus -> Annex ()
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genMetaData key file status = do
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v <- catKeyFileHEAD file
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case v of
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Nothing -> noop
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Just oldkey ->
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whenM (copyMetaData oldkey key)
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warncopied
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whenM (annexGenMetaData <$> Annex.getGitConfig) $ do
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curr <- getCurrentMetaData key
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addMetaData key (dateMetaData mtime curr)
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where
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mtime = posixSecondsToUTCTime $ realToFrac $ modificationTime status
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warncopied = warning $
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"Copied metadata from old version of " ++ file ++ " to new version. " ++
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"If you don't want this copied metadata, run: git annex metadata --remove-all " ++ file
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{- Generates metadata for a file's date stamp.
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- Does not overwrite any existing metadata values. -}
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dateMetaData :: UTCTime -> MetaData -> MetaData
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dateMetaData mtime old = MetaData $ M.fromList $ filter isnew
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[ (yearMetaField, S.singleton $ toMetaValue $ show y)
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, (monthMetaField, S.singleton $ toMetaValue $ show m)
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, (dayMetaField, S.singleton $ toMetaValue $ show d)
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]
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where
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isnew (f, _) = S.null (currentMetaDataValues f old)
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(y, m, d) = toGregorian $ utctDay mtime
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{- Parses field=value, field+=value, field-=value, field?=value -}
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parseModMeta :: String -> Either String ModMeta
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parseModMeta p = case lastMaybe f of
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Just '+' -> AddMeta <$> mkMetaField f' <*> v
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Just '-' -> DelMeta <$> mkMetaField f' <*> (Just <$> v)
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Just '?' -> MaybeSetMeta <$> mkMetaField f' <*> v
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_ -> SetMeta <$> mkMetaField f <*> (S.singleton <$> v)
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where
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(f, sv) = separate (== '=') p
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f' = beginning f
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v = pure (toMetaValue sv)
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{- Parses field=value, field<value, field<=value, field>value, field>=value -}
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parseMetaDataMatcher :: String -> Either String (MetaField, MetaValue -> Bool)
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parseMetaDataMatcher p = (,)
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<$> mkMetaField f
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<*> pure matcher
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where
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(f, op_v) = break (`elem` "=<>") p
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matcher = case op_v of
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('=':v) -> checkglob v
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('<':'=':v) -> checkcmp (<=) v
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('<':v) -> checkcmp (<) v
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('>':'=':v) -> checkcmp (>=) v
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('>':v) -> checkcmp (>) v
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_ -> checkglob ""
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checkglob v =
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let cglob = compileGlob v CaseInsensative
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in matchGlob cglob . fromMetaValue
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checkcmp cmp v v' = case (doubleval v, doubleval (fromMetaValue v')) of
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(Just d, Just d') -> d' `cmp` d
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_ -> False
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doubleval v = readish v :: Maybe Double
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