Build fails with ghc 7.8

[stulli]

template-haskell < 2.9 is needed, but 2.8.x cannot be built on ghc 7.8.x. aeson-0.6.x has the same problem (also see issue #77).

aeson-0.6.2.1 depends on template-haskell-2.8.0.0 which failed to install.
threepenny-gui-0.4.1.0 depends on template-haskell-2.8.0.0 which failed to install.

[HeinrichApfelmus]

I have updated the dependencies in the latest master branch. I can't test them, though, because I don't have GHC 7.8 installed. Could you install the package from source and tell me whether that works?

[stulli]

Worked without problems, thanks for the quick fix!

I installed with ghc 7.8.2 in a fresh cabal sandbox via cabal sandbox add-source.

[HeinrichApfelmus]

Great! I take it that the examples in the samples folder work as well?

[stulli]

Hm, my toy example worked. But looking at the samples it doesn't look so good: bartab, buttons, chat, crud, dragndrop, missing-dollars: server starts but nothing is shown on localhost except the background currencyconverter: input fields are displayed but don't update drummachine: widgets appear but no music (I suppose there should be music when ticking the boxes?)

If there is anything I can do to help you fixing that let me know.

[HeinrichApfelmus]

CurrencyConverter is definitely a problem with Data.Aeson.Generic. I'll look into backporting the relevant patches from the develop branch.

For the others, it may be a path issue, but chances are that there is an aeson problem as well.

[HeinrichApfelmus]

I have backported the relevant changes in the latest commit to the master branch. Could you check the examples again?

I recommend that you use the helper scripts in the samples folder

 cd samples
 ./runhaskell CurrencyConverter.hs

Note that you may have to set up a cabal sandbox.

cd threepenny-gui
cabal sandbox init
cabal configure -fbuildExamples
cabal install --only-dependencies

This should do the trick.

[stulli]

CurrencyConverter and DrumMachine now work as expected. Will test the other examples these days.

[stulli]

For VideoAnnotate I get this error:

VideoAnnotate/MediaPlayer.hs:25:18:
Not in scope: type constructor or class ‘Dom’

In MissingDollars the calculate button was broken for me. Replacing

result <- mapM readMay `liftM` getValuesList [hotelOut,hotelCost,hotelHold]
case result of
    Just [getout,getcost,gethold] -> updateDisplay getout getcost gethold
     _ -> return ()

with

result <- getValuesList [hotelOut,hotelCost,hotelHold]
case result of
    [getout,getcost,gethold] -> updateDisplay (read getout) (read getcost) (read gethold)
    _ -> return ()

worked though.

Everything else worked as expected as far as I can tell. Oh, and the source code links are broken (master/src/xy instead of master/samples/xy).

[HeinrichApfelmus]

Thanks a lot for checking all the examples!

• VideoAnnotate has bitrotted and isn't included in the .cabal file, so that's alright.
• MissingDollars works for me. Do you get an error message, and if so, which one? It could be a problem with readMay missing, in which case you'd have to install the safe package into the sandbox.
• I have fixed the source code links now.

[stulli]

After checking MissingDollars again everything is ok. Well, it was late yesterday so I probably just overlooked something (maybe put a non-digit into a field or sthg).

[HeinrichApfelmus]

Great, thanks a lot! I'm now going to upload the new release to hackage.