Cabal 输出被重定向但未生成 [英] Cabal output is redirected but not generated

问题描述

我设置了一个相当简单的 haskell 项目，我只想在实际开始编码之前让框架进行测试等工作.我在 /src 目录(其中 / 是项目的根目录)中有可执行文件的源文件，在 /testsuite 目录中有我的测试./testsuite 包含一个名为 TestSuite.hs 的简单测试文件，其中 main = Test.Framework.defautMain 测试 作为 main 的实现.问题是，当我运行

I have a fairly simple haskell project set up, where I just want to have the framework working with testing and so on before I actually start coding. I have my source files for an executable in a /src directory (where / is the project's root) and my tests in a /testsuite directory. /testsuite contains a simple test file called TestSuite.hs with main = Test.Framework.defautMain tests as the implementation of main. The problem is, when I run

cabal clean && cabal configure --enable-tests && cabal build

我收到警告

output was redirected with -o, but no output will be generated because there is no main module.

当我没有指定 --enable-tests 时，构建工作正常.我的阴谋文件是:

The build works fine when I don't specify --enable-tests. My cabal file is:

Name:                Example
Version:             0.1
Synopsis:            Synopsis
Description:
    Long description.
License:             GPL
License-File:        LICENSE
Author:              SeanK
Maintainer:          [e-mail]
Category:            Development
Build-Type:          Simple
Cabal-Version:       >= 1.8

Test-Suite test
    Type:               exitcode-stdio-1.0
    Main-Is:            TestSuite.hs
    Build-Depends:      base >= 3 && < 5,
                        test-framework,
                        test-framework-quickcheck
                        -- QuickCheck
    Hs-Source-Dirs:     src,
                        testsuite

Executable example
    Main-Is:            Main.hs
    -- Other-Modules:       
    Build-Depends:      base >= 3 && < 5,
                        haskell98
    Hs-Source-Dirs:     src
    Ghc-Options:        -Wall

我禁用了 QuickCheck，因为我目前没有使用 (==>)，这是我目前需要的唯一功能.其余的应该是直截了当的.任何帮助将不胜感激.

I have QuickCheck disabled because I'm not using (==>) at the moment, which is the only function I currently need from it. The rest should be straight-forward. Any help would be greatly appreciated.

推荐答案

您应该在 TestSuite.hs 文件中将模块名称定义为 Main，例如 那里.

You should define module name in your TestSuite.hs file as Main, like there for example.

引自 Haskell 98 报告:

Haskell 程序是一组模块，按照惯例，其中一个模块必须称为 Main，并且必须导出值 main.

A Haskell program is a collection of modules, one of which, by convention, must be called Main and must export the value main.

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