Shadow Copy & Link

MSBuild Variables Format

$(MSBuildProjectDirectory): NO trailing slash
$(MSBuildThisFileDirectory): HAS trailing slash

MSBuildOnlyProject.csproj

 <!-- 
=================================================
                                 WORK IN PROGRESS

Scenario: You have a MSBuild only project/package
but you need custom written msbuild tasks..

This set up requires you to create another
project.

But when you need the MSBuild only project in
solution you may face lock exceptions. This
solution tries to create a shadow copy of
the build artifacts and creates link files that
imports the original MSBuild .props and .targets
files.
=================================================
-->
 <Project Sdk="Microsoft.NET.Sdk">
 <PropertyGroup>
<TasksProjectFullPath>..\..\0.Tasks\src\Teronis.MSBuild.Packaging.PackExecutable.Tasks.csproj</TasksProjectFullPath>
  </PropertyGroup>

  <ItemGroup>

    <ProjectReference Include="$(TasksProjectFullPath)">
      <ReferenceOutputAssembly>false</ReferenceOutputAssembly>
      <SkipGetTargetFrameworkProperties>true</SkipGetTargetFrameworkProperties>
      <GlobalPropertiesToRemove>TargetFramework</GlobalPropertiesToRemove>
      <BuildProjectReferences>false</BuildProjectReferences>
      <SetTargetFramework>TargetFrameworks=netcoreapp2.1;net472</SetTargetFramework>
    </ProjectReference>

    <None Include="build\**\*.props;build\**\*.targets">
      <Pack>true</Pack>
      <PackagePath>build</PackagePath>
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>

    <None Include="..\..\0.Tasks\src\bin\Debug\**\*">
      <LinkPath>executables\any\%(RecursiveDir)</LinkPath>
      <Link>%(LinkPath)\%(Filename)%(Extension)</Link>
      <Pack>true</Pack>
      <PackagePath>%(LinkPath)</PackagePath>
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>

  </ItemGroup>

  <PropertyGroup>
    <_ShadowCopyPrefix>ShadowCopy-</_ShadowCopyPrefix>
  </PropertyGroup>

  <Target Name="MakeShadowCopy" AfterTargets="AfterBuild">
    <PropertyGroup>
      <_ShadowOutputDirName>$(_ShadowCopyPrefix)$([System.Guid]::NewGuid())</_ShadowOutputDirName>
    </PropertyGroup>

    <!--<WriteLinesToFile Lines="$(_ShadowOutputDirName)" File="$(BaseIntermediateOutputPath)RandomOutputPath.cache" />-->

    <PropertyGroup>
      <_ShadowCopyPath>$(OutputPath)..\$(_ShadowOutputDirName)\$(TargetFramework)\</_ShadowCopyPath>
      <_ShadowLinkPath>$(OutputPath)..\ShadowLink\$(TargetFramework)\</_ShadowLinkPath>
    </PropertyGroup>

    <MakeDir Directories="$(_ShadowCopyPath)" />

    <ItemGroup>
      <_MovableFiles Include="$(OutputPath)**\*" />
    </ItemGroup>

    <Copy SourceFiles="@(_MovableFiles)" DestinationFiles="$(_ShadowCopyPath)%(RecursiveDir)%(Filename)%(Extension)" />

    <ItemGroup>
      <_ProjectFiles Include="$(_ShadowCopyPath)build\**\*.props;$(_ShadowCopyPath)build\**\*.targets" />
    </ItemGroup>

    <LinkShadowCopy ShadowLinkPath="$(_ShadowLinkPath)" ProjectFiles="@(_ProjectFiles)" />
  </Target>

  <!--DependsOnTargets="_GetTargetFrameworksOutput"-->
  <Target Name="MyClean" BeforeTargets="Clean" >

    <ItemGroup>
      <_ShadowCopyDirectories Include="$([System.IO.Directory]::GetDirectories($(OutputPath)..,'$(_ShadowCopyPrefix)*-*-*-*-*'))" />
    </ItemGroup>
    
    <MSBuild Projects="$(TasksProjectFullPath)" Targets="_GetTargetFrameworksOutput">
      <Output TaskParameter="TargetOutputs" ItemName="_TargetFrameworks" />
    </MSBuild>

    <!--<Message Text="ÖÖÖÖÖ %(_TargetFrameworks.Identity) %(_ShadowCopyDirectories.Identity)" Importance="high" />-->
    <!--<CleanShadowCopies TargetFrameworks="@(_TargetFrameworks)" ShadowCopyDirectories="@(_ShadowCopyDirectories)" />-->
  </Target>
  </Project>

MSBuildOnlyProject.Tasks.targets

<Project>

  <UsingTask
    TaskName="LinkShadowCopy"
    TaskFactory="RoslynCodeTaskFactory"
    AssemblyFile="$(MSBuildToolsPath)\Microsoft.Build.Tasks.Core.dll" >
    <ParameterGroup>
      <ShadowLinkPath ParameterType="System.String" Required="true" />
      <ProjectFiles ParameterType="Microsoft.Build.Framework.ITaskItem[]" Required="true" />
    </ParameterGroup>
    <Task>
      <Using Namespace="System"/>
      <Using Namespace="System.IO"/>
      <Code Type="Fragment" Language="cs">
        <![CDATA[
foreach (var projectFile in ProjectFiles) {
  var recursiveDir = projectFile.GetMetadata("RecursiveDir");
  var outputPath = Path.Combine(ShadowLinkPath, recursiveDir);
  Directory.CreateDirectory(outputPath);
  
  var importFullPath = projectFile.GetMetadata("FullPath");
  var propsContent = $"<Project>\r\n<Import Project=\"{importFullPath}\" />\r\n</Project>";
  
  var propsFileName = projectFile.GetMetadata("Filename");
  var propsFileExtension = projectFile.GetMetadata("Extension");
  var propsFile = Path.Combine(outputPath, propsFileName + propsFileExtension);
  
  File.WriteAllText(propsFile, propsContent);
}
]]>
      </Code>
    </Task>
  </UsingTask>

  <UsingTask
    TaskName="CleanShadowCopies"
    TaskFactory="RoslynCodeTaskFactory"
    AssemblyFile="$(MSBuildToolsPath)\Microsoft.Build.Tasks.Core.dll" >
    <ParameterGroup>
      <TargetFrameworks ParameterType="Microsoft.Build.Framework.ITaskItem[]" Required="true" />
      <ShadowCopyDirectories ParameterType="Microsoft.Build.Framework.ITaskItem[]" Required="true" />
    </ParameterGroup>
    <Task>
      <Using Namespace="System"/>
      <Using Namespace="System.IO"/>
      <Code Type="Fragment" Language="cs">
        <![CDATA[
;
]]>
      </Code>
    </Task>
  </UsingTask>

</Project>