[Haskell-cafe] Re: Fix plugins package.

[Andy Stewart]

Andy Stewart <lazycat.manatee at gmail.com> writes:

> Hi Ivan,
>
> Ivan Lazar Miljenovic <ivan.miljenovic at gmail.com> writes:
>
>> Andy Stewart <lazycat.manatee at gmail.com> writes:
>>
>>> Hi all,
>>>
>>> I want to use *plugins* package
>>> (http://hackage.haskell.org/package/plugins-1.4.1)
>>>
>>> Unfortunately, it looks broken.
>>> Anybody can fix it?
>>
>> Try putting an upper bound in the constraint for `base'; since there's
>> no upper bound, cabal-install defaults to "< 4", which conflicts with
>> plugins _needing_ base >= 4.
> I think not just build-depend problem, something broken in plugins
> source code, below is compile error:
>
> ....
> src/System/Plugins/Process.hs:59:4:
>     Warning: A do-notation statement discarded a result of type GHC.Conc.ThreadId.
>              Suppress this warning by saying "_ <- forkIO
>                                                      ((>>)
>                                                         E.evaluate (length errput)
>                                                         return GHC.Unit.())",
>              or by using the flag -fno-warn-unused-do-bind
> [ 3 of 15] Compiling System.Plugins.Parser ( src/System/Plugins/Parser.hs,
> dist/build/System/Plugins/Parser.o )
>
> src/System/Plugins/Parser.hs:31:0:
>     Warning: The import of `Data.Either' is redundant
>                except perhaps to import instances from `Data.Either'
>              To import instances alone, use: import Data.Either()
> [ 4 of 15] Compiling System.Plugins.PackageAPI ( src/System/Plugins/PackageAPI.hs,
> dist/build/System/Plugins/PackageAPI.o )
>
> src/System/Plugins/PackageAPI.hs:61:24: Not in scope: `package'
>
> src/System/Plugins/PackageAPI.hs:62:25: Not in scope: `package'
> ...
Looks plugins just work on base-4 and Cabal-1.6.
Anyone can fix it make it works with Cabal-1.8?

Thanks,

  -- Andy

>
>>
>> The hint library might also do what you want:
>> http://hackage.haskell.org/package/hint
> Wow, i didn't know it.
>
> Infact, i want implement a *fully* hot-swapping feature for Haskell application, not just
> re-compile/re-load module in runtime like Yi/Xmonad, i have code do that.
> I want to a Haskell interpreter to evaluation expression/module in
> runtime, then application can develop itself in runtime, don't need
> restart.
>
> hint library looks interesting.....
>
> Thanks for hint link.
>
>   -- Andy