[Haskell-cafe] Re: Fix plugins package.

Andy Stewart writes:

Hi Ivan,

Ivan Lazar Miljenovic writes:

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Andy Stewart writes:

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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

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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