40ecf58d4b
This does not change the overall license of the git-annex program, which was already AGPL due to a number of sources files being AGPL already. Legally speaking, I'm adding a new license under which these files are now available; I already released their current contents under the GPL license. Now they're dual licensed GPL and AGPL. However, I intend for all my future changes to these files to only be released under the AGPL license, and I won't be tracking the dual licensing status, so I'm simply changing the license statement to say it's AGPL. (In some cases, others wrote parts of the code of a file and released it under the GPL; but in all cases I have contributed a significant portion of the code in each file and it's that code that is getting the AGPL license; the GPL license of other contributors allows combining with AGPL code.)
115 lines
3.9 KiB
Haskell
115 lines
3.9 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 AGPL 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.Text as T
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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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catKeyFileHEAD file >>= \case
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Nothing -> noop
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Just oldkey ->
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-- Have to copy first, before adding any
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-- more metadata, because copyMetaData does not
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-- preserve any metadata already on key.
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whenM (copyMetaData oldkey key <&&> (not <$> onlydatemeta oldkey)) $
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warncopied
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whenM (annexGenMetaData <$> Annex.getGitConfig) $ do
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old <- getCurrentMetaData key
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addMetaData key (dateMetaData mtime old)
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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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-- If the only fields copied were date metadata, and they'll
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-- be overwritten with the current mtime, no need to warn about
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-- copying.
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onlydatemeta oldkey = ifM (annexGenMetaData <$> Annex.getGitConfig)
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( null . filter (not . isDateMetaField . fst) . fromMetaData
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<$> getCurrentMetaData oldkey
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, return False
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)
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{- Generates metadata for a file's date stamp.
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-
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- Any date fields in the old metadata will be overwritten.
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-
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- Note that the returned MetaData does not contain all the input MetaData,
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- only changes to add the date fields. -}
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dateMetaData :: UTCTime -> MetaData -> MetaData
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dateMetaData mtime old = modMeta old $
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(SetMeta yearMetaField $ S.singleton $ toMetaValue $ encodeBS' $ show y)
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`ComposeModMeta`
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(SetMeta monthMetaField $ S.singleton $ toMetaValue $ encodeBS' $ show m)
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`ComposeModMeta`
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(SetMeta dayMetaField $ S.singleton $ toMetaValue $ encodeBS' $ show d)
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where
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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 <$> mkMetaField (T.pack f') <*> v
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Just '-' -> DelMeta <$> mkMetaField (T.pack f') <*> (Just <$> v)
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Just '?' -> MaybeSetMeta <$> mkMetaField (T.pack f') <*> v
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_ -> SetMeta <$> mkMetaField (T.pack f) <*> (S.singleton <$> 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 (encodeBS 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 (T.pack 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 . decodeBS . fromMetaValue
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checkcmp cmp v v' = case (doubleval v, doubleval (decodeBS (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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