Clear layout directories before copies

- `<Copy />` task will create directories
- avoid leftover files from a previous build
- avoid confusing SDK with an empty targeting pack directory
  - prevented ASP.NET targeting pack download when not building it (see #36718)

Author: dougbu

src/Framework/App.Ref/src/Microsoft.AspNetCore.App.Ref.csproj

@@ -214,21 +214,19 @@ This package is an internal implementation of the .NET Core SDK and is not meant
           DependsOnTargets="_ResolveTargetingPackContent"
           Inputs="@(RefPackContent)"
           Outputs="@(RefPackContent->'$(LayoutTargetDir)%(PackagePath)%(RecursiveDir)%(FileName)%(Extension)')">
+    <RemoveDir Directories="$(TargetingPackLayoutRoot)" />
     <Copy SourceFiles="@(RefPackContent)"
           DestinationFiles="@(RefPackContent->'$(LayoutTargetDir)%(PackagePath)%(RecursiveDir)%(FileName)%(Extension)')"
           UseHardlinksIfPossible="true" />
     <Message Importance="High" Text="$(MSBuildProjectName) -> $(LayoutTargetDir)" />
   </Target>
 
-  <ItemGroup>
-    <CreateDirectory Include="$(LocalInstallationOutputPath)" />
-  </ItemGroup>
-
   <!-- Workaround https://github.com/dotnet/sdk/issues/2910 by copying targeting pack into local installation. -->
   <Target Name="_InstallTargetingPackIntoLocalDotNet"
           DependsOnTargets="_ResolveTargetingPackContent"
           Inputs="@(RefPackContent)"
           Outputs="@(RefPackContent->'$(LocalInstallationOutputPath)%(PackagePath)%(RecursiveDir)%(FileName)%(Extension)')">
+    <RemoveDir Directories="$(LocalInstallationOutputPath)" />
     <Copy SourceFiles="@(RefPackContent)"
           DestinationFiles="@(RefPackContent->'$(LocalInstallationOutputPath)%(PackagePath)%(RecursiveDir)%(FileName)%(Extension)')"
           UseHardlinksIfPossible="true" />

src/Framework/App.Runtime/src/Microsoft.AspNetCore.App.Runtime.csproj

@@ -349,14 +349,6 @@ This package is an internal implementation of the .NET Core SDK and is not meant
     <CrossgenPlatformAssembliesDir>$(IntermediateOutputPath)platformAssemblies\</CrossgenPlatformAssembliesDir>
   </PropertyGroup>
 
-  <ItemGroup>
-    <CreateDirectory Include="$(CrossgenToolDir)" />
-    <CreateDirectory Include="$(CrossgenPlatformAssembliesDir)" />
-    <CreateDirectory Include="$(SharedFxLayoutTargetDir)" />
-    <CreateDirectory Include="$(RedistLayoutTargetDir)" />
-    <CreateDirectory Include="$(LocalInstallationOutputPath)" />
-  </ItemGroup>
-
   <Target Name="Crossgen" DependsOnTargets="$(CrossgenDependsOn)" />
 
   <Target Name="_ExpandRuntimePackageRoot">
@@ -386,6 +378,7 @@ This package is an internal implementation of the .NET Core SDK and is not meant
           Condition="'$(CrossgenOutput)' == 'true'"
           DependsOnTargets="_ExpandRuntimePackageRoot">
     <!-- The output directories of assemblies built in this repo contain a mix of ref and impl assemblies. Copy impl assemblies to a separate directory. -->
+    <RemoveDir Directories="$(CrossgenPlatformAssembliesDir)" />
     <Copy SourceFiles="@(ReferenceCopyLocalPaths)" DestinationFolder="$(CrossgenPlatformAssembliesDir)" Condition="'%(ReferenceCopyLocalPaths.ProjectPath)' != ''"/>
 
     <!-- Resolve list of assemblies to crossgen2 -->
@@ -418,6 +411,7 @@ This package is an internal implementation of the .NET Core SDK and is not meant
       <CrossgenSymbolsTargetDir Condition="HasTrailingSlash($(CrossgenSymbolsTargetDir)) AND '$(OS)' == 'Windows_NT'">$(TargetDir)\</CrossgenSymbolsTargetDir>
     </PropertyGroup>
 
+    <RemoveDir Directories="$(CrossgenToolDir)" />
     <WriteLinesToFile
         Lines="@(Crossgen2PlatformAssemblyPaths)"
         File="$(CrossgenToolDir)PlatformAssembliesPathsCrossgen2.rsp"
@@ -474,6 +468,8 @@ This package is an internal implementation of the .NET Core SDK and is not meant
       PrivateUri="$(DotNetRuntimePrivateDownloadUrl)"
       PrivateUriSuffix="$(DotNetAssetRootAccessTokenSuffix)"
       DestinationPath="$(DotNetRuntimeArchive)" />
+    <RemoveDir Directories="$(RedistSharedFrameworkLayoutRoot)" />
+    <MakeDir Directories="$(RedistSharedFrameworkLayoutRoot)" />
 
     <!-- Extract the dotnet-runtime archive -->
     <Exec Condition="'$(ArchiveExtension)' == '.tar.gz'"
@@ -500,7 +496,7 @@ This package is an internal implementation of the .NET Core SDK and is not meant
           DependsOnTargets="_ResolveSharedFrameworkContent"
           Inputs="@(SharedFxContent)"
           Outputs="@(SharedFxContent->'$(SharedFxLayoutTargetDir)%(FileName)%(Extension)')">
-
+    <RemoveDir Directories="$(SharedFrameworkLayoutRoot)" />
     <Copy SourceFiles="@(SharedFxContent)"
           DestinationFiles="@(SharedFxContent->'$(SharedFxLayoutTargetDir)%(FileName)%(Extension)')"
           UseHardlinksIfPossible="true" />
@@ -512,7 +508,7 @@ This package is an internal implementation of the .NET Core SDK and is not meant
           DependsOnTargets="_ResolveSharedFrameworkContent"
           Inputs="@(SharedFxContent)"
           Outputs="@(SharedFxContent->'$(RedistLayoutTargetDir)%(FileName)%(Extension)')">
-
+    <RemoveDir Directories="$(RedistLayoutTargetDir)" />
     <Copy SourceFiles="@(SharedFxContent)"
           DestinationFiles="@(SharedFxContent->'$(RedistLayoutTargetDir)%(FileName)%(Extension)')"
           UseHardlinksIfPossible="true" />
@@ -526,7 +522,7 @@ This package is an internal implementation of the .NET Core SDK and is not meant
           Condition="'$(DotNetBuildFromSource)' != 'true'"
           Inputs="@(SharedFxContent)"
           Outputs="@(SharedFxContent->'$(LocalInstallationOutputPath)%(FileName)%(Extension)')">
-
+    <RemoveDir Directories="$(LocalInstallationOutputPath)" />
     <Copy SourceFiles="@(SharedFxContent)"
           DestinationFiles="@(SharedFxContent->'$(LocalInstallationOutputPath)%(FileName)%(Extension)')"
           UseHardlinksIfPossible="true" />