SCONS：始终运行目标，不仅在更新时

问题描述

基于 SCONS run target，我创建了一个基本的 SCONS 脚本来构建并运行我的单元测试：

test = env.Program(
    target='artifacts/unittest',source= sources + tests
)

Alias(
    'test',test,test[0].abspath
)

在我修改代码后，效果很好：

> scons test
scons: Reading sconscript files ...
scons: done reading sconscript files.
scons: Building targets ...
g++ [...]
[Lots of compiler output]
unittest.exe
===============================================================================
All tests passed (22 assertions in 4 test cases)

如果我现在再次运行 scons test 而不更改代码，它认为不需要再次构建，这是正确的，但也不会再次运行测试：

> scons test
scons: Reading sconscript files ...
scons: done reading sconscript files.
scons: Building targets ...
scons: `test' is up to date.
scons: done building targets.

但是，很明显，我希望即使没有重建测试也能运行：

> scons test
scons: Reading sconscript files ...
scons: done reading sconscript files.
scons: Building targets ...
scons: `test' is up to date.
scons: done building targets.
unittest.exe
===============================================================================
All tests passed (22 assertions in 4 test cases)

得到这个结果的最简单方法是什么？

解决方法

试试

env.Pseudo('test')

这应该将目标标记为不生成任何文件，并且可能对您有用。

还见过 AlwaysBuild 用于触发单元测试执行。 “见过”并不意味着它一定是最佳实践（@bdbaddog 是这里的专家！）。

现在通过使用 AddMethod 创建 PseudoBuilder 来连接构建器和命令来修复它：

env.AddMethod(
    lambda env,target,source:
        [
            env.Program(
                target=target,source=source
            )[0],env.Command(
                target,source,'.\\$TARGET'
            )[0]
        ],'BuildAndRun'
)

env.Alias(
    'test',env.BuildAndRun(
        target='artifacts/unittest',source= sources + tests
    )
)

目前按预期工作：

> scons test
scons: Reading SConscript files ...
scons: done reading SConscript files.
scons: Building targets ...
g++ [...]
[Lots of compiler output]
.\artifacts\unittest
===============================================================================
All tests passed (22 assertions in 4 test cases)
> scons test
scons: Reading SConscript files ...
scons: done reading SConscript files.
scons: Building targets ...
.\artifacts\unittest
===============================================================================
All tests passed (22 assertions in 4 test cases)

唯一的缺点：命令中的反斜杠使我依赖于 Windows。

有什么意见吗？

c++scons scons