4ecba916a1Added annex.maxextensionlength for use cases where extensions longer than 4 characters are needed. This commit was sponsored by Henrik Riomar on Patreon.
34 lines
1 KiB
Haskell
34 lines
1 KiB
Haskell
{- git-annex key backend data type
|
|
-
|
|
- Most things should not need this, using Types instead
|
|
-
|
|
- Copyright 2010-2017 Joey Hess <id@joeyh.name>
|
|
-
|
|
- Licensed under the GNU GPL version 3 or higher.
|
|
-}
|
|
|
|
module Types.Backend where
|
|
|
|
import Types.Key
|
|
import Types.KeySource
|
|
|
|
data BackendA a = Backend
|
|
{ backendVariety :: KeyVariety
|
|
, getKey :: KeySource -> a (Maybe Key)
|
|
-- Verifies the content of a key.
|
|
, verifyKeyContent :: Maybe (Key -> FilePath -> a Bool)
|
|
-- Checks if a key can be upgraded to a better form.
|
|
, canUpgradeKey :: Maybe (Key -> Bool)
|
|
-- Checks if there is a fast way to migrate a key to a different
|
|
-- backend (ie, without re-hashing).
|
|
, fastMigrate :: Maybe (Key -> BackendA a -> AssociatedFile -> a (Maybe Key))
|
|
-- Checks if a key is known (or assumed) to always refer to the
|
|
-- same data.
|
|
, isStableKey :: Key -> Bool
|
|
}
|
|
|
|
instance Show (BackendA a) where
|
|
show backend = "Backend { name =\"" ++ formatKeyVariety (backendVariety backend) ++ "\" }"
|
|
|
|
instance Eq (BackendA a) where
|
|
a == b = backendVariety a == backendVariety b
|