{- Copyright (C) 2006-2010 John MacFarlane This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -} {- | Module : Main Copyright : Copyright (C) 2006-2010 John MacFarlane License : GNU GPL, version 2 or above Maintainer : John MacFarlane Stability : alpha Portability : portable Parses command-line options and calls the appropriate readers and writers. -} module Main where import Text.Pandoc import Text.Pandoc.S5 (s5HeaderIncludes) import Text.Pandoc.Shared ( tabFilter, ObfuscationMethod (..), readDataFile, headerShift, findDataFile ) #ifdef _HIGHLIGHTING import Text.Pandoc.Highlighting ( languages ) #endif import System.Environment ( getArgs, getProgName, getEnvironment ) import System.Exit ( exitWith, ExitCode (..) ) import System.FilePath import System.Console.GetOpt import Data.Char ( toLower, isDigit ) import Data.List ( intercalate, isSuffixOf ) import System.Directory ( getAppUserDataDirectory, doesFileExist ) import System.IO ( stdout, stderr ) import qualified Text.Pandoc.UTF8 as UTF8 import Text.CSL import Text.Pandoc.Biblio import Control.Monad (when, unless, liftM) import Network.HTTP (simpleHTTP, mkRequest, getResponseBody, RequestMethod(..)) import Network.URI (parseURI, isURI, URI(..)) import qualified Data.ByteString.Lazy as B import Data.ByteString.Lazy.UTF8 (toString, fromString) import Codec.Binary.UTF8.String (decodeString, encodeString) copyrightMessage :: String copyrightMessage = "\nCopyright (C) 2006-2010 John MacFarlane\n" ++ "Web: http://johnmacfarlane.net/pandoc\n" ++ "This is free software; see the source for copying conditions. There is no\n" ++ "warranty, not even for merchantability or fitness for a particular purpose." compileInfo :: String compileInfo = "\nCompiled with citeproc support." ++ #ifdef _HIGHLIGHTING "\nCompiled with syntax highlighting support for:\n" ++ wrapWords 78 languages ++ #endif "" -- | Converts a list of strings into a single string with the items printed as -- comma separated words in lines with a maximum line length. wrapWords :: Int -> [String] -> String wrapWords c = wrap' c c where wrap' _ _ [] = "" wrap' cols remaining (x:xs) = if remaining == cols then x ++ wrap' cols (remaining - length x) xs else if (length x + 1) > remaining then ",\n" ++ x ++ wrap' cols (cols - length x) xs else ", " ++ x ++ wrap' cols (remaining - (length x + 2)) xs isNonTextOutput :: String -> Bool isNonTextOutput = (`elem` ["odt","epub"]) -- | Data structure for command line options. data Opt = Opt { optTabStop :: Int -- ^ Number of spaces per tab , optPreserveTabs :: Bool -- ^ Preserve tabs instead of converting to spaces , optStandalone :: Bool -- ^ Include header, footer , optReader :: String -- ^ Reader format , optWriter :: String -- ^ Writer format , optParseRaw :: Bool -- ^ Parse unconvertable HTML and TeX , optTableOfContents :: Bool -- ^ Include table of contents , optTransforms :: [Pandoc -> Pandoc] -- ^ Doc transforms to apply , optTemplate :: String -- ^ Custom template , optVariables :: [(String,String)] -- ^ Template variables to set , optOutputFile :: String -- ^ Name of output file , optNumberSections :: Bool -- ^ Number sections in LaTeX , optSectionDivs :: Bool -- ^ Put sections in div tags in HTML , optIncremental :: Bool -- ^ Use incremental lists in Slidy/S5 , optOffline :: Bool -- ^ Make slideshow accessible offline , optXeTeX :: Bool -- ^ Format latex for xetex , optSmart :: Bool -- ^ Use smart typography , optHTMLMathMethod :: HTMLMathMethod -- ^ Method to print HTML math , optReferenceODT :: Maybe FilePath -- ^ Path of reference.odt , optEPUBStylesheet :: Maybe String -- ^ EPUB stylesheet , optEPUBMetadata :: String -- ^ EPUB metadata , optDumpArgs :: Bool -- ^ Output command-line arguments , optIgnoreArgs :: Bool -- ^ Ignore command-line arguments , optStrict :: Bool -- ^ Use strict markdown syntax , optReferenceLinks :: Bool -- ^ Use reference links in writing markdown, rst , optWrapText :: Bool -- ^ Wrap text , optPlugins :: [Pandoc -> IO Pandoc] -- ^ Plugins to apply , optEmailObfuscation :: ObfuscationMethod , optIdentifierPrefix :: String , optIndentedCodeClasses :: [String] -- ^ Default classes for indented code blocks , optDataDir :: Maybe FilePath , optCiteMethod :: CiteMethod -- ^ Method to output cites , optBibliography :: [String] , optCslFile :: FilePath } -- | Defaults for command-line options. defaultOpts :: Opt defaultOpts = Opt { optTabStop = 4 , optPreserveTabs = False , optStandalone = False , optReader = "" -- null for default reader , optWriter = "" -- null for default writer , optParseRaw = False , optTableOfContents = False , optTransforms = [] , optTemplate = "" , optVariables = [] , optOutputFile = "-" -- "-" means stdout , optNumberSections = False , optSectionDivs = False , optIncremental = False , optOffline = False , optXeTeX = False , optSmart = False , optHTMLMathMethod = PlainMath , optReferenceODT = Nothing , optEPUBStylesheet = Nothing , optEPUBMetadata = "" , optDumpArgs = False , optIgnoreArgs = False , optStrict = False , optReferenceLinks = False , optWrapText = True , optPlugins = [] , optEmailObfuscation = JavascriptObfuscation , optIdentifierPrefix = "" , optIndentedCodeClasses = [] , optDataDir = Nothing , optCiteMethod = Citeproc , optBibliography = [] , optCslFile = "" } -- | A list of functions, each transforming the options data structure -- in response to a command-line option. options :: [OptDescr (Opt -> IO Opt)] options = [ Option "fr" ["from","read"] (ReqArg (\arg opt -> return opt { optReader = map toLower arg }) "FORMAT") "" , Option "tw" ["to","write"] (ReqArg (\arg opt -> return opt { optWriter = map toLower arg }) "FORMAT") "" , Option "s" ["standalone"] (NoArg (\opt -> return opt { optStandalone = True })) "" -- "Include needed header and footer on output" , Option "o" ["output"] (ReqArg (\arg opt -> return opt { optOutputFile = arg }) "FILENAME") "" -- "Name of output file" , Option "p" ["preserve-tabs"] (NoArg (\opt -> return opt { optPreserveTabs = True })) "" -- "Preserve tabs instead of converting to spaces" , Option "" ["tab-stop"] (ReqArg (\arg opt -> return opt { optTabStop = (read arg) } ) "TABSTOP") "" -- "Tab stop (default 4)" , Option "" ["strict"] (NoArg (\opt -> return opt { optStrict = True } )) "" -- "Disable markdown syntax extensions" , Option "" ["reference-links"] (NoArg (\opt -> return opt { optReferenceLinks = True } )) "" -- "Use reference links in parsing HTML" , Option "R" ["parse-raw"] (NoArg (\opt -> return opt { optParseRaw = True })) "" -- "Parse untranslatable HTML codes and LaTeX environments as raw" , Option "S" ["smart"] (NoArg (\opt -> return opt { optSmart = True })) "" -- "Use smart quotes, dashes, and ellipses" , Option "m" ["latexmathml", "asciimathml"] (OptArg (\arg opt -> return opt { optHTMLMathMethod = LaTeXMathML arg }) "URL") "" -- "Use LaTeXMathML script in html output" , Option "" ["mathml"] (OptArg (\arg opt -> return opt { optHTMLMathMethod = MathML arg }) "URL") "" -- "Use mathml for HTML math" , Option "" ["mimetex"] (OptArg (\arg opt -> do let url' = case arg of Just u -> u ++ "?" Nothing -> "/cgi-bin/mimetex.cgi?" return opt { optHTMLMathMethod = WebTeX url' }) "URL") "" -- "Use mimetex for HTML math" , Option "" ["webtex"] (OptArg (\arg opt -> do let url' = case arg of Just u -> u Nothing -> "http://chart.apis.google.com/chart?cht=tx&chl=" return opt { optHTMLMathMethod = WebTeX url' }) "URL") "" -- "Use web service for HTML math" , Option "" ["jsmath"] (OptArg (\arg opt -> return opt { optHTMLMathMethod = JsMath arg}) "URL") "" -- "Use jsMath for HTML math" , Option "" ["mathjax"] (ReqArg (\arg opt -> return opt { optHTMLMathMethod = MathJax arg}) "URL") "" -- "Use MathJax for HTML math" , Option "" ["gladtex"] (NoArg (\opt -> return opt { optHTMLMathMethod = GladTeX })) "" -- "Use gladtex for HTML math" , Option "i" ["incremental"] (NoArg (\opt -> return opt { optIncremental = True })) "" -- "Make list items display incrementally in Slidy/S5" , Option "" ["offline"] (NoArg (\opt -> return opt { optOffline = True, optStandalone = True })) "" -- "Make slide shows include all the needed js and css" , Option "" ["xetex"] (NoArg (\opt -> return opt { optXeTeX = True })) "" -- "Format latex for processing by XeTeX" , Option "N" ["number-sections"] (NoArg (\opt -> return opt { optNumberSections = True })) "" -- "Number sections in LaTeX" , Option "" ["section-divs"] (NoArg (\opt -> return opt { optSectionDivs = True })) "" -- "Put sections in div tags in HTML" , Option "" ["no-wrap"] (NoArg (\opt -> return opt { optWrapText = False })) "" -- "Do not wrap text in output" , Option "" ["email-obfuscation"] (ReqArg (\arg opt -> do method <- case arg of "references" -> return ReferenceObfuscation "javascript" -> return JavascriptObfuscation "none" -> return NoObfuscation _ -> UTF8.hPutStrLn stderr ("Error: Unknown obfuscation method: " ++ arg) >> exitWith (ExitFailure 6) return opt { optEmailObfuscation = method }) "none|javascript|references") "" -- "Method for obfuscating email in HTML" , Option "" ["id-prefix"] (ReqArg (\arg opt -> return opt { optIdentifierPrefix = arg }) "STRING") "" -- "Prefix to add to automatically generated HTML identifiers" , Option "" ["indented-code-classes"] (ReqArg (\arg opt -> return opt { optIndentedCodeClasses = words $ map (\c -> if c == ',' then ' ' else c) arg }) "STRING") "" -- "Classes (whitespace- or comma-separated) to use for indented code-blocks" , Option "" ["toc", "table-of-contents"] (NoArg (\opt -> return opt { optTableOfContents = True })) "" -- "Include table of contents" , Option "" ["base-header-level"] (ReqArg (\arg opt -> do if all isDigit arg && (read arg :: Int) >= 1 then do let oldTransforms = optTransforms opt let shift = read arg - 1 return opt{ optTransforms = headerShift shift : oldTransforms } else do UTF8.hPutStrLn stderr $ "base-header-level must be a number >= 1" exitWith $ ExitFailure 19) "LEVEL") "" -- "Headers base level" , Option "" ["template"] (ReqArg (\arg opt -> do text <- UTF8.readFile arg return opt{ optTemplate = text, optStandalone = True }) "FILENAME") "" -- "Use custom template" , Option "V" ["variable"] (ReqArg (\arg opt -> case break (`elem` ":=") arg of (k,_:v) -> do let newvars = optVariables opt ++ [(k,v)] return opt{ optVariables = newvars } _ -> do UTF8.hPutStrLn stderr $ "Could not parse `" ++ arg ++ "' as a key/value pair (k=v or k:v)" exitWith $ ExitFailure 17) "KEY:VALUE") "" -- "Use custom template" , Option "c" ["css"] (ReqArg (\arg opt -> do -- add new link to end, so it is included in proper order let newvars = optVariables opt ++ [("css",arg)] return opt { optVariables = newvars, optStandalone = True }) "URL") "" -- "Link to CSS style sheet" , Option "H" ["include-in-header"] (ReqArg (\arg opt -> do text <- UTF8.readFile arg -- add new ones to end, so they're included in order specified let newvars = optVariables opt ++ [("header-includes",text)] return opt { optVariables = newvars, optStandalone = True }) "FILENAME") "" -- "File to include at end of header (implies -s)" , Option "B" ["include-before-body"] (ReqArg (\arg opt -> do text <- UTF8.readFile arg -- add new ones to end, so they're included in order specified let newvars = optVariables opt ++ [("include-before",text)] return opt { optVariables = newvars, optStandalone = True }) "FILENAME") "" -- "File to include before document body" , Option "A" ["include-after-body"] (ReqArg (\arg opt -> do text <- UTF8.readFile arg -- add new ones to end, so they're included in order specified let newvars = optVariables opt ++ [("include-after",text)] return opt { optVariables = newvars, optStandalone = True }) "FILENAME") "" -- "File to include after document body" , Option "T" ["title-prefix"] (ReqArg (\arg opt -> do let newvars = ("title-prefix", arg) : optVariables opt return opt { optVariables = newvars, optStandalone = True }) "STRING") "" -- "String to prefix to HTML window title" , Option "" ["reference-odt"] (ReqArg (\arg opt -> do return opt { optReferenceODT = Just arg }) "FILENAME") "" -- "Path of custom reference.odt" , Option "" ["epub-stylesheet"] (ReqArg (\arg opt -> do text <- UTF8.readFile arg return opt { optEPUBStylesheet = Just text }) "FILENAME") "" -- "Path of epub.css" , Option "" ["epub-metadata"] (ReqArg (\arg opt -> do text <- UTF8.readFile arg return opt { optEPUBMetadata = text }) "FILENAME") "" -- "Path of epub metadata file" , Option "D" ["print-default-template"] (ReqArg (\arg _ -> do templ <- getDefaultTemplate Nothing arg case templ of Right t -> UTF8.hPutStr stdout t Left e -> error $ show e exitWith ExitSuccess) "FORMAT") "" -- "Print default template for FORMAT" , Option "" ["bibliography"] (ReqArg (\arg opt -> return opt { optBibliography = (optBibliography opt) ++ [arg] }) "FILENAME") "" , Option "" ["csl"] (ReqArg (\arg opt -> return opt { optCslFile = arg }) "FILENAME") "" , Option "" ["natbib", "no-citeproc"] (NoArg (\opt -> return opt { optCiteMethod = Natbib })) "" -- "Use natbib cite commands in LaTeX output" , Option "" ["biblatex"] (NoArg (\opt -> return opt { optCiteMethod = Biblatex })) "" -- "Use biblatex cite commands in LaTeX output" , Option "" ["data-dir"] (ReqArg (\arg opt -> return opt { optDataDir = Just arg }) "DIRECTORY") -- "Directory containing pandoc data files." "" , Option "" ["dump-args"] (NoArg (\opt -> return opt { optDumpArgs = True })) "" -- "Print output filename and arguments to stdout." , Option "" ["ignore-args"] (NoArg (\opt -> return opt { optIgnoreArgs = True })) "" -- "Ignore command-line arguments." , Option "v" ["version"] (NoArg (\_ -> do prg <- getProgName UTF8.hPutStrLn stdout (prg ++ " " ++ pandocVersion ++ compileInfo ++ copyrightMessage) exitWith ExitSuccess )) "" -- "Print version" , Option "h" ["help"] (NoArg (\_ -> do prg <- getProgName UTF8.hPutStr stdout (usageMessage prg options) exitWith ExitSuccess )) "" -- "Show help" ] -- Returns usage message usageMessage :: String -> [OptDescr (Opt -> IO Opt)] -> String usageMessage programName = usageInfo (programName ++ " [OPTIONS] [FILES]" ++ "\nInput formats: " ++ (intercalate ", " $ map fst readers) ++ "\nOutput formats: " ++ (intercalate ", " $ map fst writers ++ ["odt","epub"]) ++ "\nOptions:") -- Determine default reader based on source file extensions defaultReaderName :: String -> [FilePath] -> String defaultReaderName fallback [] = fallback defaultReaderName fallback (x:xs) = case takeExtension (map toLower x) of ".xhtml" -> "html" ".html" -> "html" ".htm" -> "html" ".tex" -> "latex" ".latex" -> "latex" ".ltx" -> "latex" ".rst" -> "rst" ".lhs" -> "markdown+lhs" ".textile" -> "textile" ".native" -> "native" ".json" -> "json" _ -> defaultReaderName fallback xs -- Returns True if extension of first source is .lhs lhsExtension :: [FilePath] -> Bool lhsExtension (x:_) = takeExtension x == ".lhs" lhsExtension _ = False -- Determine default writer based on output file extension defaultWriterName :: FilePath -> String defaultWriterName "-" = "html" -- no output file defaultWriterName x = case takeExtension (map toLower x) of "" -> "markdown" -- empty extension ".tex" -> "latex" ".latex" -> "latex" ".ltx" -> "latex" ".context" -> "context" ".ctx" -> "context" ".rtf" -> "rtf" ".rst" -> "rst" ".s5" -> "s5" ".native" -> "native" ".json" -> "json" ".txt" -> "markdown" ".text" -> "markdown" ".md" -> "markdown" ".markdown" -> "markdown" ".lhs" -> "markdown+lhs" ".texi" -> "texinfo" ".texinfo" -> "texinfo" ".db" -> "docbook" ".odt" -> "odt" ".epub" -> "epub" ".org" -> "org" ['.',y] | y `elem` ['1'..'9'] -> "man" _ -> "html" main :: IO () main = do rawArgs <- liftM (map decodeString) getArgs prg <- getProgName let compatMode = (prg == "hsmarkdown") let (actions, args, errors) = if compatMode then ([], rawArgs, []) else getOpt Permute options rawArgs unless (null errors) $ do name <- getProgName mapM_ (\e -> UTF8.hPutStr stderr (name ++ ": ") >> UTF8.hPutStr stderr e) errors UTF8.hPutStrLn stderr $ "Try " ++ name ++ " --help for more information." exitWith $ ExitFailure 2 let defaultOpts' = if compatMode then defaultOpts { optReader = "markdown" , optWriter = "html" , optStrict = True } else defaultOpts -- thread option data structure through all supplied option actions opts <- foldl (>>=) (return defaultOpts') actions let Opt { optTabStop = tabStop , optPreserveTabs = preserveTabs , optStandalone = standalone , optReader = readerName , optWriter = writerName , optParseRaw = parseRaw , optVariables = variables , optTableOfContents = toc , optTransforms = transforms , optTemplate = template , optOutputFile = outputFile , optNumberSections = numberSections , optSectionDivs = sectionDivs , optIncremental = incremental , optOffline = offline , optXeTeX = xetex , optSmart = smart , optHTMLMathMethod = mathMethod , optReferenceODT = referenceODT , optEPUBStylesheet = epubStylesheet , optEPUBMetadata = epubMetadata , optDumpArgs = dumpArgs , optIgnoreArgs = ignoreArgs , optStrict = strict , optReferenceLinks = referenceLinks , optWrapText = wrap , optEmailObfuscation = obfuscationMethod , optIdentifierPrefix = idPrefix , optIndentedCodeClasses = codeBlockClasses , optDataDir = mbDataDir , optBibliography = reffiles , optCslFile = cslfile , optCiteMethod = citeMethod } = opts when dumpArgs $ do UTF8.hPutStrLn stdout outputFile mapM_ (\arg -> UTF8.hPutStrLn stdout arg) args exitWith ExitSuccess let sources = if ignoreArgs then [] else args datadir <- case mbDataDir of Nothing -> catch (liftM Just $ getAppUserDataDirectory "pandoc") (const $ return Nothing) Just _ -> return mbDataDir -- assign reader and writer based on options and filenames let readerName' = if null readerName then let fallback = if any isURI sources then "html" else "markdown" in defaultReaderName fallback sources else readerName let writerName' = if null writerName then defaultWriterName outputFile else writerName reader <- case (lookup readerName' readers) of Just r -> return r Nothing -> error ("Unknown reader: " ++ readerName') let writer = case lookup writerName' writers of Nothing | writerName' == "epub" -> writeEPUB epubStylesheet Nothing | writerName' == "odt" -> writeODT referenceODT Just r -> \o -> return . fromString . r o Nothing -> error $ "Unknown writer: " ++ writerName' templ <- getDefaultTemplate datadir writerName' let defaultTemplate = case templ of Right t -> t Left e -> error (show e) environment <- getEnvironment let columns = case lookup "COLUMNS" environment of Just cols -> read cols Nothing -> stateColumns defaultParserState let standalone' = standalone || isNonTextOutput writerName' variables' <- case (writerName', standalone', offline) of ("s5", True, True) -> do inc <- s5HeaderIncludes datadir return $ ("s5includes", inc) : variables ("slidy", True, True) -> do slidyJs <- readDataFile datadir $ "slidy" "slidy.min.js" slidyCss <- readDataFile datadir $ "slidy" "slidy.min.css" return $ ("slidy-js", slidyJs) : ("slidy-css", slidyCss) : variables _ -> return variables variables'' <- case mathMethod of LaTeXMathML Nothing -> do s <- readDataFile datadir $ "data" "LaTeXMathML.js" return $ ("mathml-script", s) : variables' MathML Nothing -> do s <- readDataFile datadir $ "data""MathMLinHTML.js" return $ ("mathml-script", s) : variables' _ -> return variables' refs <- mapM (\f -> catch (readBiblioFile f) $ \e -> do UTF8.hPutStrLn stderr $ "Error reading bibliography `" ++ f ++ "'" UTF8.hPutStrLn stderr $ show e exitWith (ExitFailure 23)) reffiles >>= \rs -> return $ concat rs let sourceDir = if null sources then "." else takeDirectory (head sources) let slideVariant = case writerName' of "s5" -> S5Slides "slidy" -> SlidySlides _ -> NoSlides let startParserState = defaultParserState { stateParseRaw = parseRaw, stateTabStop = tabStop, stateLiterateHaskell = "+lhs" `isSuffixOf` readerName' || lhsExtension sources, stateStandalone = standalone', stateCitations = map refId refs, stateSmart = smart || writerName' `elem` ["latex", "context", "latex+lhs", "man"], stateColumns = columns, stateStrict = strict, stateIndentedCodeClasses = codeBlockClasses, stateApplyMacros = writerName' `notElem` ["latex", "latex+lhs"] } let writerOptions = WriterOptions { writerStandalone = standalone', writerTemplate = if null template then defaultTemplate else template, writerVariables = variables'', writerEPUBMetadata = epubMetadata, writerTabStop = tabStop, writerTableOfContents = toc && writerName' /= "s5", writerHTMLMathMethod = mathMethod, writerSlideVariant = slideVariant, writerIncremental = incremental, writerXeTeX = xetex, writerCiteMethod = citeMethod, writerBiblioFile = head reffiles, writerIgnoreNotes = False, writerNumberSections = numberSections, writerSectionDivs = sectionDivs, writerStrictMarkdown = strict, writerReferenceLinks = referenceLinks, writerWrapText = wrap, writerLiterateHaskell = "+lhs" `isSuffixOf` writerName' || lhsExtension [outputFile], writerEmailObfuscation = if strict then ReferenceObfuscation else obfuscationMethod, writerIdentifierPrefix = idPrefix, writerSourceDirectory = sourceDir, writerUserDataDir = datadir } when (isNonTextOutput writerName' && outputFile == "-") $ do UTF8.hPutStrLn stderr ("Error: Cannot write " ++ writerName ++ " output to stdout.\n" ++ "Specify an output file using the -o option.") exitWith $ ExitFailure 5 let readSources [] = mapM readSource ["-"] readSources srcs = mapM readSource srcs readSource "-" = UTF8.getContents readSource src = case parseURI src of Just u | uriScheme u `elem` ["http:","https:"] -> readURI u _ -> UTF8.readFile src readURI uri = simpleHTTP (mkRequest GET uri) >>= getResponseBody >>= return . toString -- treat all as UTF8 let convertTabs = tabFilter (if preserveTabs then 0 else tabStop) doc <- fmap (reader startParserState . convertTabs . intercalate "\n") (readSources sources) let doc' = foldr ($) doc transforms doc'' <- do if citeMethod == Citeproc && not (null refs) then do csldir <- getAppUserDataDirectory "csl" cslfile' <- if null cslfile then findDataFile datadir "default.csl" else do ex <- doesFileExist cslfile if ex then return cslfile else findDataFile datadir $ replaceDirectory (replaceExtension cslfile "csl") csldir processBiblio cslfile' refs doc' else return doc' writerOutput <- writer writerOptions doc'' if outputFile == "-" then B.putStr writerOutput else B.writeFile (encodeString outputFile) writerOutput