rename fsckKey to verifyKeyContent

No behavior changes.

Assistant/Upgrade.hs

@@ -104,7 +104,7 @@ startDistributionDownload d = go =<< liftIO . newVersionLocation d =<< liftIO ol
 {- Called once the download is done.
  - Passed an action that can be used to clean up the downloaded file.
  -
- - Fsck the key to verify the download.
+ - Verifies the content of the downloaded key.
  -}
 distributionDownloadComplete :: GitAnnexDistribution -> FilePath -> Assistant () -> Transfer -> Assistant ()
 distributionDownloadComplete d dest cleanup t 
@@ -117,9 +117,9 @@ distributionDownloadComplete d dest cleanup t
 	k = distributionKey d
 	fsckit f = case Backend.maybeLookupBackendName (Types.Key.keyBackendName k) of
 		Nothing -> return $ Just f
-		Just b -> case Types.Backend.fsckKey b of
+		Just b -> case Types.Backend.verifyKeyContent b of
 			Nothing -> return $ Just f
-			Just a -> ifM (a k f)
+			Just verifier -> ifM (verifier k f)
 				( return $ Just f
 				, return Nothing
 				)

Backend/Hash.hs

@@ -53,7 +53,7 @@ genBackend :: Hash -> Backend
 genBackend hash = Backend
 	{ name = hashName hash
 	, getKey = keyValue hash
-	, fsckKey = Just $ checkKeyChecksum hash
+	, verifyKeyContent = Just $ checkKeyChecksum hash
 	, canUpgradeKey = Just needsUpgrade
 	, fastMigrate = Just trivialMigrate
 	, isStableKey = const True

Backend/URL.hs

@@ -22,7 +22,7 @@ backend :: Backend
 backend = Backend
 	{ name = "URL"
 	, getKey = const $ return Nothing
-	, fsckKey = Nothing
+	, verifyKeyContent = Nothing
 	, canUpgradeKey = Nothing
 	, fastMigrate = Nothing
 	-- The content of an url can change at any time, so URL keys are

Backend/WORM.hs

@@ -21,7 +21,7 @@ backend :: Backend
 backend = Backend
 	{ name = "WORM"
 	, getKey = keyValue
-	, fsckKey = Nothing
+	, verifyKeyContent = Nothing
 	, canUpgradeKey = Nothing
 	, fastMigrate = Nothing
 	, isStableKey = const True

Command/Fsck.hs

@@ -349,12 +349,15 @@ checkBackendOr :: (Key -> Annex String) -> Backend -> Key -> FilePath -> Annex B
 checkBackendOr bad backend key file =
 	checkBackendOr' bad backend key file (return True)
 
+-- The postcheck action is run after the content is verified,
+-- in order to detect situations where the file is changed while being
+-- verified (particularly in direct mode).
 checkBackendOr' :: (Key -> Annex String) -> Backend -> Key -> FilePath -> Annex Bool -> Annex Bool
 checkBackendOr' bad backend key file postcheck =
-	case Types.Backend.fsckKey backend of
+	case Types.Backend.verifyKeyContent backend of
 		Nothing -> return True
-		Just a -> do
-			ok <- a key file
+		Just verifier -> do
+			ok <- verifier key file
 			ifM postcheck
 				( do
 					unless ok $ do

Command/RecvKey.hs

@@ -70,13 +70,13 @@ start key = fieldTransfer Download key $ \_p ->
 				Nothing -> do
 					warning "recvkey: received key from direct mode repository using unknown backend; cannot check; discarding"
 					return False
-				Just backend -> maybe (return True) runfsck
-					(Types.Backend.fsckKey backend)
+				Just backend -> maybe (return True) runverify
+					(Types.Backend.verifyKeyContent backend)
 			else do
 				warning "recvkey: received key with wrong size; discarding"
 				return False
 	  where
-		runfsck check = ifM (check key tmp)
+		runverify check = ifM (check key tmp)
 			( return True
 			, do
 				warning "recvkey: received key from direct mode repository seems to have changed as it was transferred; discarding"

Command/TestRemote.hs

@@ -14,7 +14,7 @@ import qualified Remote
 import qualified Types.Remote as Remote
 import Types
 import Types.Key (key2file, keyBackendName, keySize)
-import Types.Backend (getKey, fsckKey)
+import Types.Backend (getKey, verifyKeyContent)
 import Types.KeySource
 import Annex.Content
 import Backend
@@ -156,9 +156,9 @@ test st r k =
 		(== Right b) <$> Remote.hasKey r k
 	fsck = case maybeLookupBackendName (keyBackendName k) of
 		Nothing -> return True
-		Just b -> case fsckKey b of
+		Just b -> case verifyKeyContent b of
 			Nothing -> return True
-			Just fscker -> fscker k (key2file k)
+			Just verifier -> verifier k (key2file k)
 	get = getViaTmp k $ \dest ->
 		Remote.retrieveKeyFile r k Nothing dest nullMeterUpdate
 	store = Remote.storeKey r k Nothing nullMeterUpdate

Types/Backend.hs

@@ -15,8 +15,8 @@ import Types.KeySource
 data BackendA a = Backend
 	{ name :: String
 	, getKey :: KeySource -> a (Maybe Key) 
-	-- Checks the content of a key.
-	, fsckKey :: Maybe (Key -> FilePath -> a Bool)
+	-- 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