From: Michael Orlitzky <michael@orlitzky.com>
Date: Mon, 20 Aug 2012 19:44:25 +0000 (-0400)
Subject: Print an error before usage if we can't parse the page.
X-Git-Tag: v0.0.1~6
X-Git-Url: http://gitweb.michael.orlitzky.com/?p=dead%2Flwn-epub.git;a=commitdiff_plain;h=291c39f59e958a012dd6e4ddec9b0276a4045b45

Print an error before usage if we can't parse the page.
---

diff --git a/src/Main.hs b/src/Main.hs
index 3ce1eef..1f6d7c5 100644
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -7,8 +7,11 @@ import System.Directory (doesFileExist)
 import System.IO (
   Handle,
   IOMode (WriteMode),
+  hPutStrLn,
   openBinaryFile,
-  stdout)
+  stderr,
+  stdout
+  )
 
 import CommandLine (show_help)
 import Configuration (Cfg(..), get_cfg)
@@ -40,12 +43,14 @@ main = do
   cfg  <- case aif of
            False -> get_login_cookie cfg'
            True  -> return 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
+      hPutStrLn stderr "ERROR: could not parse an LWN page from the given URL."
       _ <- show_help
       return ()