csproj复制文件取决于操作系统

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我正在使用.NET Core构建跨平台类库。根据为使用.csproj文件而构建的C＃.NET Core项目的操作系统，我需要将本机库复制到项目的输出目录。例如，对于OS XI，要复制.dylib文件，对于Windows，我要复制.DLL文件，对于Linux，我要复制.so文件。

I am using .NET Core to build a cross platform class library. Depending on the operating system that the C# .NET Core project is built for using a .csproj file, I need to copy a native library to the project's output directory. E.g., for OS X I want to copy a .dylib file, for Windows I want to copy a .DLL file, for Linux I want to copy a .so file.

如何在.csproj ItemGroup中使用Condition子句来做到这一点？

How can I do this with a Condition clause in a .csproj ItemGroup?

<ItemGroup> <Content Include="libNative.dylib" Condition=" '$(Configuration)|$(Platform)' == 'Debug|OSX' "> <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory> </Content> </ItemGroup>

$（Platform）工作。我可以使用其他变量吗？

$(Platform) does not seem to work. Is there a different variable I can use?

推荐答案

用于区分Windows和Windows。在Mac / Linux中，您可以使用 $（os）属性：这将为Windows提供 Windows_NT 和用于Mac / Linux的UNIX 。

For differentiating between Windows & Mac/Linux you can use the $(os) property: this gives you Windows_NT for Windows and UNIX for Mac/Linux.

用于区分Mac和Linux，至少在最新版本的MSBuild上，您可以使用 RuntimeInformation.IsOSPlatform 。

For differentiating between Mac & Linux, at least on recent versions of MSBuild, you can use RuntimeInformation.IsOSPlatform.

因此， csproj可以具有以下内容：

So, combined, your csproj can have something like this:

<ItemGroup> <Content Include="libNative.dll" Condition=" '$(OS)' == 'Windows_NT' "> <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory> </Content> <Content Include="libNative.so" Condition=" '$([System.Runtime.InteropServices.RuntimeInformation]::IsOSPlatform($([System.Runtime.InteropServices.OSPlatform]::Linux)))' "> <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory> </Content> <Content Include="libNative.dylib" Condition=" '$([System.Runtime.InteropServices.RuntimeInformation]::IsOSPlatform($([System.Runtime.InteropServices.OSPlatform]::OSX)))' "> <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory> </Content> </ItemGroup>

据我所知，这应该适用于所有最新版本的.Net Core，Mono和 Framework。

To the best of my knowledge, this should work in all recent versions of .Net Core, Mono and .Net Framework.

在较旧的版本中，您需要采取恶作剧的手段来区分Mac和Linux：

In older versions, you'd need to resort to evil trickery for differentiating between Mac & Linux:

对于Linux-> Condition ='$（OS）'=='Unix'和！$（[System.IO。 File] :: Exists（'/ usr / lib / libc.dylib'））

For Linux -> Condition=" '$(OS)' == 'Unix' and ! $([System.IO.File]::Exists('/usr/lib/libc.dylib')) "

对于Mac-> Condition ='$（OS）'=='Unix'和$（[System.IO.File] :: Exists（'/ usr / lib / libc.dylib'））

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