haskell-stack：要加载的主模块不明确

Question

我有多个名称不冲突的可执行文件。 然而stack ghci抱怨主模块不明确：

$ find . -type f -exec grep -Hi "apple\|banana" {} \; | grep -v work
./ambig.cabal:executable apple
./ambig.cabal:  main-is:             Apple.hs
./ambig.cabal:  ghc-options:         -main-is Apple.apple
./ambig.cabal:executable banana
./ambig.cabal:  main-is:             Banana.hs
./ambig.cabal:  ghc-options:         -main-is Banana.banana
./src/Apple.hs:module Apple (apple) where
./src/Apple.hs:apple :: IO ()
./src/Apple.hs:apple = putStrLn "I am apple"
./src/Banana.hs:module Banana (banana) where
./src/Banana.hs:banana :: IO ()
./src/Banana.hs:banana = putStrLn "I am banana"
$ stack ghci
The main module to load is ambiguous. Candidates are: [...]
$ stack --version
Version 1.5.1, Git revision 600c1f01435a10d127938709556c1682ecfd694e

如何让stack ghci加载所有这些不冲突的模块？

完整的 cabal 文件：

$ cat ambig.cabal
name:                ambig
version:             0.1.0.0
build-type:          Simple
cabal-version:       >=1.10

executable apple
  hs-source-dirs:      src
  main-is:             Apple.hs
  ghc-options:         -main-is Apple.apple
  default-language:    Haskell2010
  build-depends:       base >= 4.7 && < 5

executable banana
  hs-source-dirs:      src
  main-is:             Banana.hs
  ghc-options:         -main-is Banana.banana
  default-language:    Haskell2010
  build-depends:       base >= 4.7 && < 5

Answer 1

我遇到了同样的问题，如果我将我在我的项目中所做的转换为您的项目，您应该能够执行以下任一操作来选择主模块：

stack ghci --main-is ambig:exe:apple

或

stack ghci --main-is ambig:exe:banana