686791c4ed
Remove dup definitions and just use the RawFilePath one. </> etc are enough faster that it's probably faster than building a String directly, although I have not benchmarked.
45 lines
1.4 KiB
Haskell
45 lines
1.4 KiB
Haskell
{- git-annex .variant files for automatic merge conflict resolution
|
|
-
|
|
- Copyright 2014 Joey Hess <id@joeyh.name>
|
|
-
|
|
- Licensed under the GNU AGPL version 3 or higher.
|
|
-}
|
|
|
|
module Annex.VariantFile where
|
|
|
|
import Annex.Common
|
|
import Utility.Hash
|
|
|
|
import qualified Data.ByteString as S
|
|
|
|
variantMarker :: String
|
|
variantMarker = ".variant-"
|
|
|
|
mkVariant :: FilePath -> String -> FilePath
|
|
mkVariant file variant = takeDirectory file
|
|
</> dropExtension (takeFileName file)
|
|
++ variantMarker ++ variant
|
|
++ takeExtension file
|
|
|
|
{- The filename to use when resolving a conflicted merge of a file,
|
|
- that points to a key.
|
|
-
|
|
- Something derived from the key needs to be included in the filename,
|
|
- but rather than exposing the whole key to the user, a very weak hash
|
|
- is used. There is a very real, although still unlikely, chance of
|
|
- conflicts using this hash.
|
|
-
|
|
- In the event that there is a conflict with the filename generated
|
|
- for some other key, that conflict will itself be handled by the
|
|
- conflicted merge resolution code. That case is detected, and the full
|
|
- key is used in the filename.
|
|
-}
|
|
variantFile :: FilePath -> Key -> FilePath
|
|
variantFile file key
|
|
| doubleconflict = mkVariant file (fromRawFilePath (keyFile key))
|
|
| otherwise = mkVariant file (shortHash $ serializeKey' key)
|
|
where
|
|
doubleconflict = variantMarker `isInfixOf` file
|
|
|
|
shortHash :: S.ByteString -> String
|
|
shortHash = take 4 . show . md5s
|