堆栈构建失败，由于缺少包，虽然栈ghci的作品 [英] Stack build fails due to missing package although stack ghci works

问题描述

我试图在Haskell中使用堆栈来构建一个简单的程序。我使用 stack new 创建了一个新项目，然后做了一个 stack setup 。模板建立良好。

我想试验二进制文件解析，所以我导入了 Data.ByteString 。我的 build-depends 在cabal文件中看起来像这样：

  build - 取决于：基准> = 4.7&& < 5 
，bytestring> = 0.10.6 
，二进制> = 0.7.5 
  

stack ghci 现在可以工作，但是 stack build 仍然不满意。
有人可以告诉我我在这里做错了什么吗？

以下是完整的错误消息：

  test-0.1.0.0：build 
预处理库测试-0.1.0.0 ... 
就地注册测试-0.1.0.0 ... 
为test-0.1.0.0 ... 
 
 haskell / test / app / Main.hs：4：18预处理可执行文件'test-exe'：
找不到模块的数据。 ByteString'
它是隐藏包'bytestring-0.10.6.0@bytes_6VWy06pWzJq9evDvK2d4w6'的成员。 
也许你需要在你的.cabal文件中添加'bytestring'到build-depends。 
使用-v查看搜索的文件列表。 
 
 haskell / test / app / Main.hs：5：8：
无法找到模块'Data.Binary.Get'
它是隐藏包' binary-0.7.5.0@binar_3uXFWMoAGBg0xKP9MHKRwi。 
也许你需要在你的.cabal文件中为build-depends添加'binary'。 
使用-v查看搜索的文件列表。 
 
  - 使用以下命令构建软件包测试-0.1.0.0：
 .stack / setup-exe-cache / x86_64-osx / setup-Simple-Cabal-1.22.5.0-ghc-7.10 .3 --builddir = .stack-work / dist / x86_64-osx / Cabal-1.22.5.0 build lib：test exe：test-exe --ghc-options-ddump-hi -ddump-to-file
 Process退出代码：ExitFailure 1 
  

这是我的app / Main.hs文件：

 模块Main其中
 
导入Lib 
将限定的Data.ByteString导入为B 
 import Data.Binary.Get 
 import Data.Word 
 $ b $ main main :: IO（）
 main = do 
 putStrLnf
 < 
 
解决方案
 / div> 
这很可能是因为您向库的 build-depends 添加了 bytestring ，而不是可执行文件。避免需要重复这些不同节的依赖关系的一个选择是使用 hpack 作为包描述格式。  
I am trying to build a simple program in Haskell using stack. I created a new project using stack new and did a stack setup after that. The template builds fine. 

I want to experiment with binary file parsing, so I imported Data.ByteString. My build-depends in the cabal file look like this:
build-depends:     base >= 4.7 && < 5
                 , bytestring >= 0.10.6
                 , binary >= 0.7.5
stack ghci now just works, but stack build is still not happy. 
Can someone tell me what I did wrong here?

Here is the complete error message:
test-0.1.0.0: build
Preprocessing library test-0.1.0.0...
In-place registering test-0.1.0.0...
Preprocessing executable 'test-exe' for test-0.1.0.0...

haskell/test/app/Main.hs:4:18:
    Could not find module ‘Data.ByteString’
    It is a member of the hidden package ‘bytestring-0.10.6.0@bytes_6VWy06pWzJq9evDvK2d4w6’.
    Perhaps you need to add ‘bytestring’ to the build-depends in your .cabal file.
    Use -v to see a list of the files searched for.

haskell/test/app/Main.hs:5:8:
    Could not find module ‘Data.Binary.Get’
    It is a member of the hidden package ‘binary-0.7.5.0@binar_3uXFWMoAGBg0xKP9MHKRwi’.
    Perhaps you need to add ‘binary’ to the build-depends in your .cabal file.
    Use -v to see a list of the files searched for.

--  While building package test-0.1.0.0 using:
      .stack/setup-exe-cache/x86_64-osx/setup-Simple-Cabal-1.22.5.0-ghc-7.10.3 --builddir=.stack-work/dist/x86_64-osx/Cabal-1.22.5.0 build lib:test exe:test-exe --ghc-options " -ddump-hi -ddump-to-file"
    Process exited with code: ExitFailure 1
and this is my app/Main.hs file:
module Main where

import Lib
import qualified Data.ByteString as B
import Data.Binary.Get
import Data.Word

main :: IO ()
main =  do
    putStrLn "f"
Thank you very much for your help.
解决方案
This is likely because you added bytestring to the build-depends of the library, not the executable.  One option to avoid needing to repeat these dependencies for the different stanzas is to use hpack as the package description format.

                        
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