diff --git a/src/Text/Pandoc/App.hs b/src/Text/Pandoc/App.hs
index d48ae1932..f96f67314 100644
--- a/src/Text/Pandoc/App.hs
+++ b/src/Text/Pandoc/App.hs
@@ -26,6 +26,7 @@ import Prelude
import qualified Control.Exception as E
import Control.Monad
import Control.Monad.Trans
+import Control.Monad.Except (throwError)
import qualified Data.ByteString as BS
import qualified Data.ByteString.Lazy as B
import Data.Char (toLower)
@@ -101,40 +102,6 @@ convertWithOpts opts = do
selectUserDataDir ds
Just _ -> return $ optDataDir opts
- -- assign reader and writer based on options and filenames
- let readerName = case optReader opts of
- Just f -> f
- Nothing -> fromMaybe fallback $
- formatFromFilePaths sources
- where fallback = if any isURI sources
- then "html"
- else "markdown"
-
- let pdfOutput = map toLower (takeExtension outputFile) == ".pdf"
-
- -- TODO: we have to get the input and the output into the state for
- -- the sake of the text2tags reader.
- (reader, readerExts) <-
- case getReader readerName of
- Right (r, es) -> return (r :: Reader PandocIO, es)
- Left e -> E.throwIO $ PandocAppError e'
- where e' = case readerName of
- "pdf" -> e ++
- "\nPandoc can convert to PDF, but not from PDF."
- "doc" -> e ++
- "\nPandoc can convert from DOCX, but not from DOC.\nTry using Word to save your DOC file as DOCX, and convert that with pandoc."
- _ -> e
-
- let convertTabs = tabFilter (if optPreserveTabs opts ||
- readerName == "t2t" ||
- readerName == "man"
- then 0
- else optTabStop opts)
-
- readSources :: [FilePath] -> PandocIO Text
- readSources srcs = convertTabs . T.intercalate (T.pack "\n") <$>
- mapM readSource srcs
-
let runIO' :: PandocIO a -> IO a
runIO' f = do
(res, reports) <- runIOorExplode $ do
@@ -161,6 +128,43 @@ convertWithOpts opts = do
setInputFiles (optInputFiles opts)
setOutputFile (optOutputFile opts)
+ -- assign reader and writer based on options and filenames
+ readerName <- case optReader opts of
+ Just f -> return f
+ Nothing -> case formatFromFilePaths sources of
+ Just f' -> return f'
+ Nothing | sources == ["-"] -> return "markdown"
+ | any isURI sources -> return "html"
+ | otherwise -> do
+ report $ UnknownExtensions
+ (map takeExtension sources) "markdown"
+ return "markdown"
+
+ let pdfOutput = map toLower (takeExtension outputFile) == ".pdf"
+
+ (reader, readerExts) <-
+ case getReader readerName of
+ Right (r, es) -> return (r :: Reader PandocIO, es)
+ Left e -> throwError $ PandocAppError e'
+ where e' = case readerName of
+ "pdf" -> e ++
+ "\nPandoc can convert to PDF, but not from PDF."
+ "doc" -> e ++
+ "\nPandoc can convert from DOCX, but not from DOC.\nTry using Word to save your DOC file as DOCX, and convert that with pandoc."
+ _ -> e
+
+ let convertTabs = tabFilter (if optPreserveTabs opts ||
+ readerName == "t2t" ||
+ readerName == "man"
+ then 0
+ else optTabStop opts)
+
+
+ let readSources :: [FilePath] -> PandocIO Text
+ readSources srcs = convertTabs . T.intercalate (T.pack "\n") <$>
+ mapM readSource srcs
+
+
outputSettings <- optToOutputSettings opts
let format = outputFormat outputSettings
let writer = outputWriter outputSettings
@@ -180,7 +184,7 @@ convertWithOpts opts = do
istty <- liftIO $ queryTerminal stdOutput
#endif
when (not (isTextFormat format) && istty && isNothing ( optOutputFile opts)) $
- liftIO $ E.throwIO $ PandocAppError $
+ throwError $ PandocAppError $
"Cannot write " ++ format ++ " output to terminal.\n" ++
"Specify an output file using the -o option, or " ++
"use '-o -' to force output to stdout."
diff --git a/src/Text/Pandoc/App/OutputSettings.hs b/src/Text/Pandoc/App/OutputSettings.hs
index a9034d6f2..31bd64c4c 100644
--- a/src/Text/Pandoc/App/OutputSettings.hs
+++ b/src/Text/Pandoc/App/OutputSettings.hs
@@ -70,9 +70,15 @@ optToOutputSettings opts = do
if pdfOutput
then liftIO $ pdfWriterAndProg (optWriter opts) (optPdfEngine opts)
else case optWriter opts of
- Nothing ->
- return (fromMaybe "html" $ formatFromFilePaths [outputFile],
- Nothing)
+ Nothing
+ | outputFile == "-" -> return ("html", Nothing)
+ | otherwise ->
+ case formatFromFilePaths [outputFile] of
+ Nothing -> do
+ report $ UnknownExtensions
+ [takeExtension outputFile] "html"
+ return ("html", Nothing)
+ Just f -> return (f, Nothing)
Just f -> return (f, Nothing)
let format = if ".lua" `isSuffixOf` writerName
diff --git a/src/Text/Pandoc/Logging.hs b/src/Text/Pandoc/Logging.hs
index 188702367..4107dc121 100644
--- a/src/Text/Pandoc/Logging.hs
+++ b/src/Text/Pandoc/Logging.hs
@@ -30,7 +30,7 @@ import Data.Aeson.Encode.Pretty (Config (..), defConfig, encodePretty',
keyOrder)
import qualified Data.ByteString.Lazy as BL
import Data.Data (Data, toConstr)
-import Data.List (isSuffixOf)
+import Data.List (isSuffixOf, intercalate)
import qualified Data.Text as Text
import Data.Typeable (Typeable)
import GHC.Generics (Generic)
@@ -88,6 +88,7 @@ data LogMessage =
| CouldNotLoadTranslations String String
| UnexpectedXmlElement String String
| UnknownOrgExportOption String
+ | UnknownExtensions [String] String
deriving (Show, Eq, Data, Ord, Typeable, Generic)
instance ToJSON LogMessage where
@@ -207,6 +208,9 @@ instance ToJSON LogMessage where
"parent" .= Text.pack parent]
UnknownOrgExportOption option ->
["option" .= Text.pack option]
+ UnknownExtensions exts format ->
+ ["extensions" .= map Text.pack exts
+ ,"format" .= Text.pack format]
showPos :: SourcePos -> String
@@ -310,6 +314,10 @@ showLogMessage msg =
"Unexpected XML element " ++ element ++ " in " ++ parent
UnknownOrgExportOption option ->
"Ignoring unknown Org export option: " ++ option
+ UnknownExtensions exts format ->
+ "Could not deduce format from file extension " ++
+ intercalate " or " exts ++ "\n" ++
+ "Defaulting to " ++ format
messageVerbosity:: LogMessage -> Verbosity
messageVerbosity msg =
@@ -351,3 +359,4 @@ messageVerbosity msg =
CouldNotLoadTranslations{} -> WARNING
UnexpectedXmlElement {} -> WARNING
UnknownOrgExportOption {} -> WARNING
+ UnknownExtensions{} -> WARNING