Merge pull request #34 from jonkri/master

Fix GHC 7.0 build errors, update `Tested-With', and update example

README.md

@@ -25,6 +25,16 @@ _Note:_ You will need the ICU Unicode library and it's header files in order to
 be able to build Pontarius XMPP. On Debian, you will need to install the
 *libicu-dev* package. In Fedora, the package is called *libicu-devel*.
 
+_Note to GHC 7.0 users:_ You will need *cabal-install*, version *0.14.0* or
+higher, or the build will fail with an "unrecognized option:
+--disable-benchmarks" error. The versions *1.16.0* and higher might not build on
+your system; if so, install *0.14.0* with "cabal install cabal-install-0.14.0".
+
+_Note to GHC 7.0.1 users:_ You will want to configure your Cabal environment
+(including *cabal-install*) for *bytestring*, version *0.9.2.1*. We recommend
+that you run "cabal install bytestring-0.9.2.1 cabal-install-0.14.0" prior to
+installing Pontarius XMPP.
+
 The first thing to do is to import the modules that we are going to use. We are
 also using the OverloadedStrings LANGUAGE pragma in order to be able to type
 <code>Text</code> values like strings.

examples/echoclient/Main.hs

@@ -30,5 +30,5 @@ main = do
     forever $ do
         msg <- getMessage sess
         case answerMessage msg (messagePayload msg) of
-            Just answer -> sendMessage answer sess
+            Just answer -> sendMessage answer sess >> return ()
             Nothing -> putStrLn "Received message with no sender."

pontarius-xmpp.cabal

@@ -1,6 +1,6 @@
 Name:          pontarius-xmpp
 Version:       0.2.0.1
-Cabal-Version: >= 1.6
+Cabal-Version: >= 1.4
 Build-Type:    Simple
 License:       OtherLicense
 License-File:  LICENSE.md
@@ -16,7 +16,7 @@ Synopsis:      An incomplete XMPP client implementation
 Description:   Pontarius XMPP is a work in progress implementation of RFC 6120
                ("XMPP CORE"), RFC 6121 ("XMPP IM"), and RFC 6122 ("XMPP ADDR").
 Category:      Network
-Tested-With:   GHC ==7.0.4, GHC ==7.4.1
+Tested-With:   GHC >=7.0.1 && <=7.6.3
 
 Extra-Source-Files: README.md
                   , examples/echoclient/echoclient.cabal
@@ -28,6 +28,45 @@ Extra-Source-Files: README.md
 Library
   hs-source-dirs: source
   Exposed: True
+  -- The only different between the below two blocks is that the first one caps
+  -- the range for the `bytestring' package.
+  If impl(ghc == 7.0.1)
+  {
+    Build-Depends: attoparsec           >=0.10.0.3
+                 , base                 >4 && <5
+                 , base64-bytestring    >=0.1.0.0
+                 , binary               >=0.4.1
+                 , bytestring           >=0.9.1.9 && <=0.9.2.1
+                 , conduit              >=0.5
+                 , containers           >=0.5.0.0
+                 , crypto-api           >=0.9
+                 , crypto-random-api    >=0.2
+                 , cryptohash           >=0.6.1
+                 , cryptohash-cryptoapi >=0.1
+                 , data-default         >=0.2
+                 , dns                  >=0.3.0
+                 , hslogger             >=1.1.0
+                 , iproute              >=1.2.4
+                 , lifted-base          >=0.1.0.1
+                 , mtl                  >=2.0.0.0
+                 , network              >=2.4.1.0
+                 , pureMD5              >=2.1.2.1
+                 , resourcet            >=0.3.0
+                 , random               >=1.0.0.0
+                 , split                >=0.1.2.3
+                 , stm                  >=2.1.2.1
+                 , stringprep           >=0.1.3
+                 , text                 >=0.11.1.5
+                 , tls                  >=1.1.0
+                 , tls-extra            >=0.5.0
+                 , transformers         >=0.2.2.0
+                 , void                 >=0.5.5
+                 , xml-types            >=0.3.1
+                 , xml-conduit          >=1.0
+                 , xml-picklers         >=0.3.3
+  }
+  else
+  {
     Build-Depends: attoparsec           >=0.10.0.3
                  , base                 >4 && <5
                  , base64-bytestring    >=0.1.0.0
@@ -60,6 +99,7 @@ Library
                  , xml-types            >=0.3.1
                  , xml-conduit          >=1.0
                  , xml-picklers         >=0.3.3
+  }
   Exposed-modules: Network.Xmpp
                  , Network.Xmpp.IM
                  , Network.Xmpp.Internal

source/Network/Xmpp/Stream.hs

@@ -39,7 +39,7 @@ import           Network.DNS hiding (encode, lookup)
 import           Network.Xmpp.Marshal
 import           Network.Xmpp.Types
 import           System.IO
-import           System.IO.Error (tryIOError)
+-- import           System.IO.Error (tryIOError) <- Only available in base >=4.4
 import           System.Log.Logger
 import           System.Random (randomRIO)
 import           Text.XML.Stream.Parse as XP
@@ -821,3 +821,7 @@ withStream' action (Stream stream) = do
 
 mkStream :: StreamState -> IO Stream
 mkStream con = Stream `fmap` atomically (newTMVar con)
+
+-- "Borrowed" from base-4.4 for compatibility with GHC 7.0.1.
+tryIOError :: IO a -> IO (Either IOError a)
+tryIOError f = catch (f >>= \r -> return (Right r)) (return . Left)