Make it compile under snap >= 0.14

[adinapoli]

Hey Doug,

I have the suspect that this Snap commit, by removing re-exports, it's triggering this compilation error under GHC 7.8.4 and snap >= 0.14:

[1 of 1] Compiling Snap.Snaplet.AcidState ( src/Snap/Snaplet/AcidState.hs, dist/build/Snap/Snaplet/AcidState.o )

src/Snap/Snaplet/AcidState.hs:103:11: Not in scope: ‘liftIO’

src/Snap/Snaplet/AcidState.hs:127:48:
    Not in scope: type constructor or class ‘MonadState’
    Perhaps you meant ‘MonadSnap’ (imported from Snap)

src/Snap/Snaplet/AcidState.hs:129:30: Not in scope: ‘gets’

src/Snap/Snaplet/AcidState.hs:137:12:
    Not in scope: type constructor or class ‘MonadState’
    Perhaps you meant ‘MonadSnap’ (imported from Snap)

src/Snap/Snaplet/AcidState.hs:139:12:
    Not in scope: type constructor or class ‘MonadIO’
    Perhaps you meant ‘Monad’ (imported from Prelude)

src/Snap/Snaplet/AcidState.hs:143:5: Not in scope: ‘liftIO’

src/Snap/Snaplet/AcidState.hs:151:11:
    Not in scope: type constructor or class ‘MonadState’
    Perhaps you meant ‘MonadSnap’ (imported from Snap)

src/Snap/Snaplet/AcidState.hs:153:11:
    Not in scope: type constructor or class ‘MonadIO’
    Perhaps you meant ‘Monad’ (imported from Prelude)

src/Snap/Snaplet/AcidState.hs:157:5: Not in scope: ‘liftIO’

src/Snap/Snaplet/AcidState.hs:163:22:
    Not in scope: type constructor or class ‘MonadIO’
    Perhaps you meant ‘Monad’ (imported from Prelude)

src/Snap/Snaplet/AcidState.hs:165:22:
    Not in scope: type constructor or class ‘MonadState’
    Perhaps you meant ‘MonadSnap’ (imported from Snap)

src/Snap/Snaplet/AcidState.hs:170:5: Not in scope: ‘liftIO’

src/Snap/Snaplet/AcidState.hs:176:1:
    Duplicate type signatures for ‘createCheckpoint’
    at src/Snap/Snaplet/AcidState.hs:163:1-16
       src/Snap/Snaplet/AcidState.hs:176:1-16
rc/Snap/Snaplet/AcidState.hs:176:22:
    Not in scope: type constructor or class ‘MonadIO’
    Perhaps you meant ‘Monad’ (imported from Prelude)

src/Snap/Snaplet/AcidState.hs:178:22:
    Not in scope: type constructor or class ‘MonadState’
    Perhaps you meant ‘MonadSnap’ (imported from Snap)

src/Snap/Snaplet/AcidState.hs:181:1:
    Multiple declarations of ‘createCheckpoint’
    Declared at: src/Snap/Snaplet/AcidState.hs:168:1
                 src/Snap/Snaplet/AcidState.hs:181:1

src/Snap/Snaplet/AcidState.hs:183:5: Not in scope: ‘liftIO’

src/Snap/Snaplet/AcidState.hs:191:20:
    Not in scope: type constructor or class ‘MonadIO’
    Perhaps you meant ‘Monad’ (imported from Prelude)

src/Snap/Snaplet/AcidState.hs:193:20:
    Not in scope: type constructor or class ‘MonadState’
    Perhaps you meant ‘MonadSnap’ (imported from Snap)

src/Snap/Snaplet/AcidState.hs:198:5: Not in scope: ‘liftIO’
ghc --make: /Users/adinapoli/Library/Haskell/ghc-7.8.4/bin/ghc failure (return code=1)
cabal-1.22.0.1: Error: some packages failed to install:
snaplet-acid-state-0.2.6.1 failed during the building phase. The exception
was:
ExitFailure 1
cabal install: /usr/hs/tools/cabal-1.22.0.1 failure (return code=1)

What's the best course of action here?

Thanks!
Alfredo

[mightybyte]

I haven't been able to duplicate this. It builds fine for me on both 7.8 and 7.10.

[adinapoli]

How weird, perhaps it's the particular package stack I'm using? Would posting it here clear the waters?

To be clear, to get this I had to manually relax the constrain in the cabal manifest to allow snap >= 0.14, but I assume you did that as well?

[mightybyte]

You must be running an old version.

http://hackage.haskell.org/package/snaplet-acid-state

[adinapoli]

Totally plausible; I think I screwed up by forgetting to update the tip of my local fork to upstream, causing the accidental waste of your time (apologies).

Will confirm tonight & close this.

Alfredo