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PandocMonad: allow nested data files #8822

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PandocMonad: allow nested data files #8822

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23 changes: 13 additions & 10 deletions src/Text/Pandoc/Class/PandocMonad.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -417,16 +417,19 @@ findFileWithDataFallback subdir fp = do
existsInWorkingDir <- fileExists fp
if existsInWorkingDir
then return $ Just fp
else do
mbDataDir <- checkUserDataDir fp
case mbDataDir of
Nothing -> return Nothing
Just datadir -> do
let datafp = datadir </> subdir </> fp
existsInDataDir <- fileExists datafp
return $ if existsInDataDir
then Just datafp
else Nothing
else checkUserDataDir fp >>= findInDataDir
where
findInDataDir Nothing = pure Nothing
findInDataDir (Just datadir) = do
let datafp = datadir </> subdir </> fp
let nested = datadir </> subdir </> dropExtension fp </> fp
existsInDataDir <- fileExists datafp
nestedInDataDir <- fileExists nested
return $
case () of
_ | existsInDataDir -> Just datafp
_ | nestedInDataDir -> Just nested
_ -> Nothing

-- | Traverse tree, filling media bag for any images that
-- aren't already in the media bag.
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