Update Directory.Build.props

... and make the Windows build use the same package cache as build.sh

src/SourceBuild/content/.gitignore

@@ -1,5 +1,4 @@
 /.dotnet
-/.packages
 /artifacts
 /eng/tools/**/bin
 /eng/tools/**/obj

src/SourceBuild/content/Directory.Build.props

@@ -21,6 +21,8 @@
   <PropertyGroup Label="CalculateArch">
     <BuildArchitecture>$([System.Runtime.InteropServices.RuntimeInformation]::ProcessArchitecture.ToString().ToLowerInvariant)</BuildArchitecture>
     <HostArchitecture Condition="'$(HostArchitecture)' == ''">$(BuildArchitecture)</HostArchitecture>
+
+    <!-- When building on non-x64 architectures, there may be no cross-compilation available, select a target architecture that is the same as the build. -->
     <TargetArchitecture Condition="'$(TargetArchitecture)' == '' and '$(BuildArchitecture)' == 'arm'">arm</TargetArchitecture>
     <TargetArchitecture Condition="'$(TargetArchitecture)' == '' and '$(BuildArchitecture)' == 'armv6'">armv6</TargetArchitecture>
     <TargetArchitecture Condition="'$(TargetArchitecture)' == '' and '$(BuildArchitecture)' == 'armel'">armel</TargetArchitecture>
@@ -28,9 +30,10 @@
     <TargetArchitecture Condition="'$(TargetArchitecture)' == '' and '$(BuildArchitecture)' == 'loongarch64'">loongarch64</TargetArchitecture>
     <TargetArchitecture Condition="'$(TargetArchitecture)' == '' and '$(BuildArchitecture)' == 's390x'">s390x</TargetArchitecture>
     <TargetArchitecture Condition="'$(TargetArchitecture)' == '' and '$(BuildArchitecture)' == 'ppc64le'">ppc64le</TargetArchitecture>
-    <TargetArchitecture Condition="'$(TargetArchitecture)' == '' and '$(TargetsMobile)' == 'true'">x64</TargetArchitecture>
+
     <TargetArchitecture Condition="'$(OverrideTargetRid)' != ''">$(OverrideTargetRid.Substring($(OverrideTargetRid.LastIndexOf('-'))).TrimStart('-'))</TargetArchitecture>
     <TargetArchitecture Condition="'$(TargetArchitecture)' == ''">x64</TargetArchitecture>
+
     <Platform Condition="'$(Platform)' == '' and '$(InferPlatformFromTargetArchitecture)' == 'true'">$(TargetArchitecture)</Platform>
     <Platform Condition="'$(Platform)' == ''">AnyCPU</Platform>
   </PropertyGroup>
@@ -59,6 +62,9 @@
        Keep in sync with props/targets in the Arcade.Sdk. -->
   <PropertyGroup Condition="'$(_SuppressSdkImports)' == 'true' or '$(SkipArcadeSdkImport)' == 'true'">
     <!-- RepoLayout.props -->
+    <NuGetPackageRoot Condition="'$(NuGetPackageRoot)' != ''">$([MSBuild]::NormalizeDirectory('$(NuGetPackageRoot)'))</NuGetPackageRoot>
+    <NuGetPackageRoot Condition="'$(NuGetPackageRoot)' == '' and '$(NUGET_PACKAGES)' != ''">$([MSBuild]::NormalizeDirectory('$(NUGET_PACKAGES)'))</NuGetPackageRoot>
+
     <RepoRoot Condition="'$(RepoRoot)' == ''">$([MSBuild]::NormalizeDirectory('$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildProjectDirectory), 'global.json'))'))</RepoRoot>
 
     <!-- Respect environment variable for the .NET install directory if set; otherwise, use the repo default location -->
@@ -136,18 +142,16 @@
     <SrcDir>$([MSBuild]::NormalizeDirectory('$(RepoRoot)', 'src'))</SrcDir>
     <ToolsDir>$([MSBuild]::NormalizeDirectory('$(RepositoryEngineeringDir)', 'tools'))</ToolsDir>
     <TasksDir>$([MSBuild]::NormalizeDirectory('$(ToolsDir)', 'tasks'))</TasksDir>
-    <PrereqsDir>$([MSBuild]::NormalizeDirectory('$(RepoRoot)', 'prereqs'))</PrereqsDir>
-    <KeysDir>$([MSBuild]::NormalizeDirectory('$(PrereqsDir)', 'keys'))</KeysDir>
     <RepoProjectsDir>$([MSBuild]::NormalizeDirectory('$(RepoRoot)', 'repo-projects'))</RepoProjectsDir>
 
-    <PrereqsPackagesDir>$(PrereqsDir)/packages/</PrereqsPackagesDir>
+    <PrereqsDir>$([MSBuild]::NormalizeDirectory('$(RepoRoot)', 'prereqs'))</PrereqsDir>
-    <PackagesDir Condition="'$(NuGetPackageRoot)' != ''">$(NuGetPackageRoot)</PackagesDir>
+    <KeysDir>$([MSBuild]::NormalizeDirectory('$(PrereqsDir)', 'keys'))</KeysDir>
-    <PackagesDir Condition="'$(PackagesDir)' == ''">$(PrereqsPackagesDir)restored/</PackagesDir>
+    <PrereqsPackagesDir>$([MSBuild]::NormalizeDirectory('$(PrereqsDir)', 'packages'))</PrereqsPackagesDir>
 
     <!-- When SB mode, the initial arcade is unzipped to a the "ArcadeBootStrap" dir.
          When running in VBPOC, the bootstrap package is the arcade restored at the beginning of the build. -->
-    <ArcadeBootstrapPackageDir Condition="'$(DotNetBuildFromSource)' == 'true'">$(PackagesDir)ArcadeBootstrapPackage/</ArcadeBootstrapPackageDir>
+    <ArcadeBootstrapPackageDir Condition="'$(DotNetBuildFromSource)' == 'true'">$([MSBuild]::NormalizeDirectory('$(NuGetPackageRoot)', 'ArcadeBootstrapPackage'))</ArcadeBootstrapPackageDir>
-    <ArcadeBootstrapPackageDir Condition="'$(DotNetBuildFromSource)' != 'true'">$(PackagesDir)</ArcadeBootstrapPackageDir>
+    <ArcadeBootstrapPackageDir Condition="'$(DotNetBuildFromSource)' != 'true'">$(NuGetPackageRoot)</ArcadeBootstrapPackageDir>
 
     <!-- Collapsed output and intermediate path folders that are architecture and configuration specific. -->
     <CollapsedOutputPath>$([MSBuild]::NormalizeDirectory('$(ArtifactsDir)', '$(TargetArchitecture)', '$(Configuration)'))</CollapsedOutputPath>

src/SourceBuild/content/eng/build.ps1

@@ -32,7 +32,7 @@ function Get-Usage() {
 
 # Set the NUGET_PACKAGES dir so that we don't accidentally pull some packages from the global location,
 # They should be pulled from the local feeds.
-$env:NUGET_PACKAGES="$PSScriptRoot/.packages"
+$env:NUGET_PACKAGES="$PSScriptRoot\prereqs\packages\restored\"
 
 function Build {
   InitializeToolset

src/SourceBuild/content/repo-projects/Directory.Build.targets

@@ -360,7 +360,7 @@
     </ItemGroup>
 
     <Copy SourceFiles="@(_InnerPackageCacheFiles)"
-          DestinationFiles="$(PackagesDir)%(RecursiveDir)%(Filename)%(Extension)"
+          DestinationFiles="$(NuGetPackageRoot)%(RecursiveDir)%(Filename)%(Extension)"
           Condition=" '@(_InnerPackageCacheFiles)' != '' " />
   </Target>
 
@@ -394,8 +394,8 @@
          and then delete all expanded files and the nupkg from the package cache so the next time
          the package is used, it will reload the source-built version -->
     <ItemGroup>
-      <_FilesToCopy Include="$(PackagesDir)$([System.String]::copy('%(_BuiltPackageInfos.PackageId)').ToLowerInvariant())/%(_BuiltPackageInfos.PackageVersion)/**/*.nupkg" />
+      <_FilesToCopy Include="$(NuGetPackageRoot)$([System.String]::copy('%(_BuiltPackageInfos.PackageId)').ToLowerInvariant())/%(_BuiltPackageInfos.PackageVersion)/**/*.nupkg" />
-      <_FilesToDelete Include="$(PackagesDir)$([System.String]::copy('%(_BuiltPackageInfos.PackageId)').ToLowerInvariant())/%(_BuiltPackageInfos.PackageVersion)/**/*.*" />
+      <_FilesToDelete Include="$(NuGetPackageRoot)$([System.String]::copy('%(_BuiltPackageInfos.PackageId)').ToLowerInvariant())/%(_BuiltPackageInfos.PackageVersion)/**/*.*" />
     </ItemGroup>
 
     <Copy SourceFiles="@(_FilesToCopy)" DestinationFolder="$(PreviouslyRestoredPackagesPath)$(RepositoryName)/" />
@@ -548,7 +548,7 @@
     <Copy SourceFiles="@(PackageVersionPropsSnapshotFiles)" DestinationFolder="$(PackageReportDir)snapshots/" />
 
     <ItemGroup>
-      <AllRestoredPackageFiles Include="$(PackagesDir)**/*.nupkg" />
+      <AllRestoredPackageFiles Include="$(NuGetPackageRoot)**/*.nupkg" />
 
       <!-- Only contains packages when building. -->
       <TarballPrebuiltPackageFiles Include="$(PrebuiltPackagesPath)*.nupkg" />
@@ -558,7 +558,7 @@
       <ReferencePackageFiles Include="$(ReferencePackagesDir)**/*.nupkg" />
 
       <!-- Check all RIDs from all restored Microsoft.NETCore.Platforms packages. -->
-      <PlatformsRuntimeJsonFiles Include="$(PackagesDir)microsoft.netcore.platforms/*/PortableRuntimeIdentifierGraph.json" />
+      <PlatformsRuntimeJsonFiles Include="$(NuGetPackageRoot)microsoft.netcore.platforms/*/PortableRuntimeIdentifierGraph.json" />
 
       <!-- Add some other potential top-level project directories for a more specific report. -->
       <ProjectDirectories Include="$(SourceBuiltSdksDir);$(TasksDir);$(ArtifactsObjDir)" />