Use sdk paths! (#62619)

Author: BrennanConroy

global.json

@@ -1,6 +1,8 @@
 {
   "sdk": {
-    "version": "10.0.100-rc.1.25411.109"
+    "version": "10.0.100-rc.1.25411.109",
+    "paths": [ ".dotnet", "$host$" ],
+    "errorMessage": "The .NET SDK could not be found, run ./restore.cmd or ./restore.sh first."
   },
   "tools": {
     "dotnet": "10.0.100-rc.1.25411.109",

src/ProjectTemplates/TestInfrastructure/PrepareForTest.targets

@@ -59,7 +59,7 @@
     <PropertyGroup>
       <TestTemplateCreationFolder>$([MSBuild]::NormalizePath('$(OutputPath)$(TestTemplateCreationFolder)'))</TestTemplateCreationFolder>
       <CustomTemplateHivePath>$(TestTemplateCreationFolder)\Hives\$([System.Guid]::NewGuid())\.templateengine</CustomTemplateHivePath>
-      <TemplateTestDotNetRoot Condition="'$(IsHelixJob)' != 'true'">$(TestTemplateCreationFolder)dotnet\</TemplateTestDotNetRoot>
+      <TemplateTestDotNetRoot Condition="'$(IsHelixJob)' != 'true'">$(TestTemplateCreationFolder).dotnet\</TemplateTestDotNetRoot>
       <_DotNetHostFileName>dotnet</_DotNetHostFileName>
       <_DotNetHostFileName Condition="$([MSBuild]::IsOSPlatform(`Windows`))">dotnet.exe</_DotNetHostFileName>
     </PropertyGroup>
@@ -120,6 +120,7 @@
       <_FilesToCopy Include="$(LocalDotNetRoot)shared\**\*" DestinationRelativeFolder="shared\" />
       <_FilesToCopy Include="$(LocalDotNetRoot)sdk\**\*" DestinationRelativeFolder="sdk\" />
       <_FilesToCopy Include="$(SharedFrameworkLayoutRoot)\**\*" />
+      <_FilesToCopy Include="$(RepoRoot)\global.json" />
 
       <_DestinationFiles Include="@(_FilesToCopy->'$(TemplateTestDotNetRoot)%(DestinationRelativeFolder)%(RecursiveDir)%(Filename)%(Extension)')" />
     </ItemGroup>

src/ProjectTemplates/global.json

@@ -0,0 +1,7 @@
+{
+  "sdk": {
+    "version": "10.0.100-rc.1.25411.109",
+    "paths": [ "scripts/.dotnet", "$host$" ],
+    "errorMessage": "The .NET SDK could not be found, run ./restore.cmd or ./restore.sh first."
+  }
+}