26 lines
746 B
Haskell
26 lines
746 B
Haskell
|
{- git-annex backend utilities
|
||
|
|
-
|
||
|
|
- Copyright 2012 Joey Hess <joey@kitenet.net>
|
||
|
|
-
|
||
|
|
- Licensed under the GNU GPL version 3 or higher.
|
||
|
|
-}
|
||
|
|
|
||
|
|
module Backend.Utilities where
|
||
|
|
|
||
|
|
import Data.Hash.MD5
|
||
|
|
|
||
|
|
import Common.Annex
|
||
|
|
|
||
|
|
{- 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 at half the filename length limit, and its
|
||
|
|
- md5 is prepended to ensure a unique key. -}
|
||
|
|
genKeyName :: String -> Annex String
|
||
|
|
genKeyName s = do
|
||
|
|
limit <- liftIO . fileNameLengthLimit =<< fromRepo gitAnnexDir
|
||
|
|
let s' = preSanitizeKeyName s
|
||
|
|
let truncs = truncateFilePath (limit `div` 2) s'
|
||
|
|
return $ if s' == truncs
|
||
|
|
then s'
|
||
|
|
else truncs ++ "-" ++ md5s (Str s)
|