如何使用同一包的兩個版本？

Question

我需要在cabal文件和/或Login.hs中更改哪些內容？ 請注意，此包中的其他.hs文件需要不同的導管版本。

（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

你可以指定你的陰謀文件版本，並使用陰謀-dev的ghci的（如果你使用陰謀-DEV）。

而且你不能使用同一個軟件包的兩個版本，但在你的情況下，你可以使用fb從GitHub：

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