diff options
Diffstat (limited to 'Annex/ReplaceFile.hs')
| -rw-r--r-- | Annex/ReplaceFile.hs | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/Annex/ReplaceFile.hs b/Annex/ReplaceFile.hs index 8b15f5ce3..e734c4d64 100644 --- a/Annex/ReplaceFile.hs +++ b/Annex/ReplaceFile.hs @@ -23,11 +23,16 @@ import Annex.Exception - Throws an IO exception when it was unable to replace the file. -} replaceFile :: FilePath -> (FilePath -> Annex ()) -> Annex () -replaceFile file a = do +replaceFile file action = replaceFileOr file action (liftIO . nukeFile) + +{- If unable to replace the file with the temp file, runs the + - rollback action, which is responsible for cleaning up the temp file. -} +replaceFileOr :: FilePath -> (FilePath -> Annex ()) -> (FilePath -> Annex ()) -> Annex () +replaceFileOr file action rollback = do tmpdir <- fromRepo gitAnnexTmpMiscDir void $ createAnnexDirectory tmpdir - bracketIO (setup tmpdir) nukeFile $ \tmpfile -> do - a tmpfile + bracketAnnex (liftIO $ setup tmpdir) rollback $ \tmpfile -> do + action tmpfile liftIO $ catchIO (rename tmpfile file) (fallback tmpfile) where setup tmpdir = do |