add key stability checking interface

Needed for resuming from chunks.

Url keys are considered not stable. I considered treating url keys with a
known size as stable, but just don't feel that is enough information.
This commit is contained in:
Joey Hess 2014-07-27 12:33:46 -04:00
parent aad8cfe718
commit 13bbb61a51
5 changed files with 18 additions and 1 deletions

View file

@ -45,6 +45,7 @@ genBackend hash = Just Backend
, fsckKey = Just $ checkKeyChecksum hash
, canUpgradeKey = Just needsUpgrade
, fastMigrate = Just trivialMigrate
, isStableKey = const True
}
genBackendE :: Hash -> Maybe Backend