Directory.Build.targets

<Project InitialTargets="CheckForBuildTools">
  
  <Target Name="CheckForBuildTools">
    <Error Condition="!Exists('$(ToolsDir)')"
           Text="The tools directory [$(ToolsDir)] does not exist. Please run build in the root of the repo to ensure the tools are installed before attempting to build an individual project." />
  </Target>

  <Target Name="CopyNativeAssemblies"
          BeforeTargets="PrepareForRun">

    <PropertyGroup>
      <LibPrefix Condition="'$(OS)' != 'Windows_NT' OR '$(AssumeOS)' != 'windows'">lib</LibPrefix>
      <LibExtension Condition="'$(OS)' == 'Windows_NT' OR '$(AssumeOS)' == 'windows'">.dll</LibExtension>
      <LibExtension Condition="'$(OS)' != 'Windows_NT' OR '$(AssumeOS)' == 'linux'">.so</LibExtension>
      <LibExtension Condition="$([MSBuild]::IsOSPlatform('osx'))  OR '$(AssumeOS)' == 'mac'">.dylib</LibExtension>
    </PropertyGroup>

    <ItemGroup>
      <NativeAssemblyReference>
        <FullAssemblyPath>$(NativeOutputPath)$(LibPrefix)%(NativeAssemblyReference.Identity)$(LibExtension)%(NativeAssemblyReference.ExtraExtension)</FullAssemblyPath>
      </NativeAssemblyReference>
    </ItemGroup>

    <Copy SourceFiles = "@(NativeAssemblyReference->'%(FullAssemblyPath)')"
          DestinationFolder="$(OutputPath)"
          OverwriteReadOnlyFiles="$(OverwriteReadOnlyFiles)"
          Retries="$(CopyRetryCount)"
          RetryDelayMilliseconds="$(CopyRetryDelayMilliseconds)"
          UseHardlinksIfPossible="$(CreateHardLinksForPublishFilesIfPossible)"
          UseSymboliclinksIfPossible="$(CreateSymbolicLinksForPublishFilesIfPossible)">
      <Output TaskParameter="DestinationFiles" ItemName="FileWrites"/>
    </Copy>
    
  </Target>
  
  <Import Project="$(ToolsDir)/versioning.targets" Condition="Exists('$(ToolsDir)/versioning.targets')" />
</Project>