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fix false positive from checkPresentExportWithContentIdentifierM when file does not exist

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This commit is contained in:
Joey Hess 2019-03-05 17:04:00 -04:00
parent 5767b1b00d
commit b23c301820
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GPG key ID: DB12DB0FF05F8F38
1 changed files with 12 additions and 7 deletions
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19
Remote/Directory.hs
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@ -402,7 +402,7 @@ storeExportWithContentIdentifierM dir src _k loc overwritablecids p =
liftIO (getFileStatus tmpf) >>= liftIO . mkContentIdentifier tmpf >>= \case
Nothing -> return Nothing
Just newcid ->
checkExportContent dir loc (newcid:overwritablecids) Nothing $ do
checkExportContent dir loc (newcid:overwritablecids) Nothing $ const $ do
liftIO $ rename tmpf dest
return (Just newcid)
where
@ -412,13 +412,18 @@ storeExportWithContentIdentifierM dir src _k loc overwritablecids p =
removeExportWithContentIdentifierM :: FilePath -> Key -> ExportLocation -> [ContentIdentifier] -> Annex Bool
removeExportWithContentIdentifierM dir k loc removeablecids =
checkExportContent dir loc removeablecids False $
removeExportM dir k loc
checkExportContent dir loc removeablecids False $ \case
DoesNotExist -> return True
KnownContentIdentifier -> removeExportM dir k loc
checkPresentExportWithContentIdentifierM :: FilePath -> Key -> ExportLocation -> [ContentIdentifier] -> Annex Bool
checkPresentExportWithContentIdentifierM dir _k loc knowncids =
checkPresentGeneric' dir $
checkExportContent dir loc knowncids False (return True)
checkExportContent dir loc knowncids False $ \case
DoesNotExist -> return False
KnownContentIdentifier -> return True
data CheckResult = DoesNotExist | KnownContentIdentifier
-- Checks if the content at an ExportLocation is in the knowncids,
-- and only runs the callback that modifies it if it's safe to do so.
@ -435,19 +440,19 @@ checkPresentExportWithContentIdentifierM dir _k loc knowncids =
--
-- So, it suffices to check if the destination file's current
-- content is known, and immediately run the callback.
checkExportContent :: FilePath -> ExportLocation -> [ContentIdentifier] -> a -> Annex a -> Annex a
checkExportContent :: FilePath -> ExportLocation -> [ContentIdentifier] -> a -> (CheckResult -> Annex a) -> Annex a
checkExportContent dir loc knowncids unsafe callback =
tryWhenExists (liftIO $ getFileStatus dest) >>= \case
Just destst
| not (isRegularFile destst) -> return unsafe
| otherwise -> catchDefaultIO Nothing (liftIO $ mkContentIdentifier dest destst) >>= \case
Just destcid
| destcid `elem` knowncids -> callback
| destcid `elem` knowncids -> callback KnownContentIdentifier
-- dest exists with other content
| otherwise -> return unsafe
-- should never happen
Nothing -> return unsafe
-- dest does not exist
Nothing -> callback
Nothing -> callback DoesNotExist
where
dest = exportPath dir loc