aa6919737c
Change --metadata comparisons < > <= and >= to fall back to lexicographical comparisons when one or both values being compared are not numbers. Sponsored-by: Erik Bjäreholt on Patreon
120 lines
4 KiB
Haskell
120 lines
4 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 -> RawFilePath -> Maybe POSIXTime -> Annex ()
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genMetaData key file mmtime = 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) $
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case mmtime of
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Just mtime -> do
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old <- getCurrentMetaData key
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addMetaData key $
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dateMetaData (posixSecondsToUTCTime mtime) old
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Nothing -> noop
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where
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warncopied = warning $
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"Copied metadata from old version of " ++ fromRawFilePath file ++ " to new version. " ++
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"If you don't want this copied metadata, run: git annex metadata --remove-all " ++ fromRawFilePath 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 (GlobFilePath False)
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in matchGlob cglob . decodeBS . fromMetaValue
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checkcmp cmp cmp' v mv' =
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let v' = decodeBS (fromMetaValue mv')
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in case (doubleval v, doubleval v') of
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(Just d, Just d') -> d' `cmp` d
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_ -> v' `cmp'` v
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doubleval v = readish v :: Maybe Double
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