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{-# LANGUAGE CPP #-}
#ifdef EMBED_DATA_FILES
{-# LANGUAGE TemplateHaskell #-}
#endif
{- |
Module : Text.Pandoc.Data
Copyright : Copyright (C) 2013-2020 John MacFarlane
License : GNU GPL, version 2 or above
Maintainer : John MacFarlane <jgm@berkeley@edu>
Stability : alpha
Portability : portable
Provide contents data files as Haskell values.
-}
module Text.Pandoc.Data (initializeDataFiles) where
import Text.Pandoc.Class (modifyCommonState, CommonState(..), PandocMonad)
#ifdef EMBED_DATA_FILES
import qualified Data.ByteString as B
import Data.FileEmbed
import System.FilePath (splitDirectories)
import qualified System.FilePath.Posix as Posix
#endif
-- | Inject data from data files into CommonState, so that
-- we don't need to read data files from file system. This
-- only has an effect if pandoc was compiled with
-- the @embed_data_files@ flag. Generally you'll want to
-- put this at the beginning of any PandocMonad action
-- that will require reading pandoc's data files (e.g. templates).
initializeDataFiles :: PandocMonad m => m ()
initializeDataFiles =
#ifdef EMBED_DATA_FILES
modifyCommonState $ \st ->st{ stDataFiles = dataFiles }
#else
return ()
#endif
#ifdef EMBED_DATA_FILES
-- We ensure that the data files are stored using Posix
-- path separators (/), even on Windows.
dataFiles :: [(FilePath, B.ByteString)]
dataFiles = map (\(fp, contents) ->
(Posix.joinPath (splitDirectories fp), contents)) dataFiles'
dataFiles' :: [(FilePath, B.ByteString)]
dataFiles' = ("MANUAL.txt", $(embedFile "MANUAL.txt")) :
-- handle the hidden file separately, since embedDir doesn't
-- include it:
("docx/_rels/.rels", $(embedFile "data/docx/_rels/.rels")) :
("pptx/_rels/.rels", $(embedFile "data/pptx/_rels/.rels")) :
$(embedDir "data")
#endif
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