322c542b5c
the encode' and decode' functions on Windows should not apply the filesystem encoding, which does not work there. Instead, convert to and from UTF-8. Also, avoid exporting encodeW8 and decodeW8. Both use the filesystem encoding, so won't work as expected on windows.
34 lines
900 B
Haskell
34 lines
900 B
Haskell
{- git-annex backend utilities
|
|
-
|
|
- Copyright 2012-2019 Joey Hess <id@joeyh.name>
|
|
-
|
|
- Licensed under the GNU AGPL version 3 or higher.
|
|
-}
|
|
|
|
module Backend.Utilities where
|
|
|
|
import Annex.Common
|
|
import Utility.Hash
|
|
|
|
import qualified Data.ByteString as S
|
|
import qualified Data.ByteString.Lazy as L
|
|
|
|
{- Generates a keyName from an input string. Takes care of sanitizing it.
|
|
- If it's not too long, the full string is used as the keyName.
|
|
- Otherwise, it's truncated, and its md5 is prepended to ensure a unique
|
|
- key. -}
|
|
genKeyName :: String -> S.ByteString
|
|
genKeyName s
|
|
-- Avoid making keys longer than the length of a SHA256 checksum.
|
|
| bytelen > sha256len = encodeBS' $
|
|
truncateFilePath (sha256len - md5len - 1) s' ++ "-" ++
|
|
show (md5 bl)
|
|
| otherwise = encodeBS' s'
|
|
where
|
|
s' = preSanitizeKeyName s
|
|
bl = encodeBL s
|
|
bytelen = fromIntegral $ L.length bl
|
|
|
|
sha256len = 64
|
|
md5len = 32
|
|
|