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minor optimisation

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Avoid re-writing the file when the journal directory did not
exist.
This commit is contained in:
Joey Hess 2022-07-18 13:49:17 -04:00
commit 1c40b927aa
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1 changed files with 4 additions and 5 deletions
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9
Annex/Journal.hs
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@ -84,13 +84,12 @@ setJournalFile _jl ru file content = withOtherTmp $ \tmp -> do
-- journal file is written atomically -- journal file is written atomically
let jfile = journalFile file let jfile = journalFile file
let tmpfile = tmp P.</> jfile let tmpfile = tmp P.</> jfile
let write = liftIO $ do liftIO $ withFile (fromRawFilePath tmpfile) WriteMode $ \h ->
withFile (fromRawFilePath tmpfile) WriteMode $ \h -> writeJournalHandle h content
writeJournalHandle h content let mv = liftIO $ moveFile tmpfile (jd P.</> jfile)
moveFile tmpfile (jd P.</> jfile)
-- avoid overhead of creating the journal directory when it already -- avoid overhead of creating the journal directory when it already
-- exists -- exists
write `catchIO` (const (createAnnexDirectory jd >> write)) mv `catchIO` (const (createAnnexDirectory jd >> mv))
data JournalledContent data JournalledContent
= NoJournalledContent = NoJournalledContent