동일한 패키지의 두 버전을 사용하려면 어떻게해야합니까?

Question

Cabal 파일 및 Login.hs에서 무엇을 변경해야합니까? 이 패키지의 다른 .hs 파일에는 다른 conduit 버전이 필요합니다.

(SRC https://github.com/gertcuykens/haskell-design)

gert@couchdb:~/Downloads/haskell-design/src$ ghci Chat.hs 
GHCi, version 7.4.2: http://www.haskell.org/ghc/ :? for help 
Loading package ghc-prim ... linking ... done. 
Loading package integer-gmp ... linking ... done. 
Loading package base ... linking ... done. 
[1 of 2] Compiling Login   (Login.hs, interpreted) 

Login.hs:27:9: 
    No instance for (Control.Monad.Trans.Control.MonadBaseControl 
         IO m0) 
     arising from a use of `withManager' 
    Possible fix: 
     add an instance declaration for 
     (Control.Monad.Trans.Control.MonadBaseControl IO m0) 
    In the expression: withManager 
    In the expression: 
     withManager 
     $ \ manager 
      -> FB.runFacebookT app manager 
      $ FB.getUserAccessTokenStep1 url perms 
    In an equation for `fbUrl': 
     fbUrl 
      = withManager 
      $ \ manager 
       -> FB.runFacebookT app manager 
        $ FB.getUserAccessTokenStep1 url perms 

Login.hs:27:55: 
    Couldn't match expected type `http-conduit-1.4.1.8:Network.HTTP.Conduit.Manager.Manager' 
       with actual type `http-conduit-1.5.0.3:Network.HTTP.Conduit.Manager.Manager' 
    In the second argument of `FB.runFacebookT', namely `manager' 
    In the expression: FB.runFacebookT app manager 
    In the expression: 
     FB.runFacebookT app manager $ FB.getUserAccessTokenStep1 url perms 

Login.hs:31:13: 
    No instance for (Control.Monad.Trans.Control.MonadBaseControl 
         IO m1) 
     arising from a use of `withManager' 
    Possible fix: 
     add an instance declaration for 
     (Control.Monad.Trans.Control.MonadBaseControl IO m1) 
    In the expression: withManager 
    In the expression: 
     withManager 
     $ \ manager 
      -> FB.runFacebookT app manager 
      $ do { t <- FB.getUserAccessTokenStep2 url [...]; 
        u <- FB.getUser "me" [] (Just t); 
        .... } 
    In an equation for `fbEmail': 
     fbEmail c 
      = withManager 
      $ \ manager 
       -> FB.runFacebookT app manager 
        $ do { t <- FB.getUserAccessTokenStep2 url ...; 
          .... } 

Login.hs:31:59: 
    Couldn't match expected type `http-conduit-1.4.1.8:Network.HTTP.Conduit.Manager.Manager' 
       with actual type `http-conduit-1.5.0.3:Network.HTTP.Conduit.Manager.Manager' 
    In the second argument of `FB.runFacebookT', namely `manager' 
    In the expression: FB.runFacebookT app manager 
    In the expression: 
     FB.runFacebookT app manager 
     $ do { t <- FB.getUserAccessTokenStep2 url [c]; 
      u <- FB.getUser "me" [] (Just t); 
      return $ FB.userEmail u } 

Login.hs:37:12: 
    No instance for (Control.Monad.Trans.Control.MonadBaseControl 
         IO m2) 
     arising from a use of `withManager' 
    Possible fix: 
     add an instance declaration for 
     (Control.Monad.Trans.Control.MonadBaseControl IO m2) 
    In the expression: withManager 
    In the expression: 
     withManager 
     $ \ manager 
      -> FB.runFacebookT app manager 
      $ do { t <- FB.getUserAccessTokenStep2 url [...]; 
        u <- FB.getUser "me" [] (Just t); 
        .... } 
    In an equation for `fbName': 
     fbName c 
      = withManager 
      $ \ manager 
       -> FB.runFacebookT app manager 
        $ do { t <- FB.getUserAccessTokenStep2 url ...; 
          .... } 

Login.hs:37:58: 
    Couldn't match expected type `http-conduit-1.4.1.8:Network.HTTP.Conduit.Manager.Manager' 
       with actual type `http-conduit-1.5.0.3:Network.HTTP.Conduit.Manager.Manager' 
    In the second argument of `FB.runFacebookT', namely `manager' 
    In the expression: FB.runFacebookT app manager 
    In the expression: 
     FB.runFacebookT app manager 
     $ do { t <- FB.getUserAccessTokenStep2 url [c]; 
      u <- FB.getUser "me" [] (Just t); 
      return $ FB.userName u } 
Failed, modules loaded: none. 
Prelude> 

Answer 1

당신은 당신의 음모 파일의 버전을 지정하고 사용할 수 음모-DEV ghci (당신은 음모-DEV를 사용하는 경우).

그리고 당신은 같은 패키지의 두 가지 버전을 사용할 수 없지만 경우에 당신은 GitHub의에서 fb를 사용할 수 있습니다

$ git clone https://github.com/snoyberg/fb.git 
$ cd fb 
$ cabal install fb.cabal