+{-# LANGUAGE DoAndIfThenElse #-}
module Main
where
+import System.IO (
+ Handle,
+ IOMode (WriteMode),
+ openBinaryFile,
+ stdout)
+
+import CommandLine (show_help)
+import Configuration (Cfg(..), get_cfg)
+import LWN.Page (epublish, page_from_url)
+
+
+-- | If we're given an empty path, return a handle to
+-- 'stdout'. Otherwise, open the given file and return a read/write
+-- handle to that.
+get_output_handle :: FilePath -> IO Handle
+get_output_handle path =
+ if (null path) then
+ return stdout
+ else
+ openBinaryFile path WriteMode
+
main :: IO ()
main = do
- putStrLn "Hello, world."
+ cfg <- get_cfg
+ page <- page_from_url cfg (article cfg)
+ case page of
+ Just p -> do
+ output_handle <- get_output_handle (output cfg)
+ epublish p output_handle
+ Nothing -> do
+ _ <- show_help
+ return ()