Add AllSubsets option for comprehensive restore/build operations

Co-authored-by: jtschuster <[email protected]>

Author: Copilot

eng/Subsets.props

@@ -153,9 +153,23 @@
     <BootstrapSubsets Condition="'$(UseNativeAotForComponents)' == 'true'">$(BootstrapSubsets)+clr.nativeaotlibs+clr.nativeaotruntime+libs.native</BootstrapSubsets>
 
     <SwapNativeForIL Condition="$(_subset.Contains('+bootstrap+')) and '$(RuntimeFlavor)' == 'CoreCLR'">true</SwapNativeForIL>
+    
+    <!-- Define AllSubsets to include all available subsets including OnDemand ones -->
+    <AllSubsetsExpansion>clr+mono+libs+tools+host+packs</AllSubsetsExpansion>
+    <AllSubsetsExpansion>$(AllSubsetsExpansion)+clr.nativeprereqs+clr.iltools+clr.runtime+clr.native+clr.aot+clr.nativeaotlibs+clr.nativeaotruntime+clr.crossarchtools</AllSubsetsExpansion>
+    <AllSubsetsExpansion>$(AllSubsetsExpansion)+clr.paltests+clr.paltestlist+clr.hosts+clr.jit+clr.alljits+clr.alljitscommunity+clr.spmi+clr.corelib+clr.nativecorelib+clr.tools+clr.toolstests+clr.packages</AllSubsetsExpansion>
+    <AllSubsetsExpansion Condition="$([MSBuild]::IsOsPlatform(Windows))">$(AllSubsetsExpansion)+linuxdac+alpinedac</AllSubsetsExpansion>
+    <AllSubsetsExpansion>$(AllSubsetsExpansion)+crossdacpack</AllSubsetsExpansion>
+    <AllSubsetsExpansion>$(AllSubsetsExpansion)+mono.runtime+mono.emsdk+mono.aotcross+mono.corelib+mono.manifests+mono.packages+mono.tools+mono.wasmruntime+mono.wasiruntime+mono.wasmworkload+mono.mscordbi+mono.workloads</AllSubsetsExpansion>
+    <AllSubsetsExpansion>$(AllSubsetsExpansion)+tools.illink+tools.cdac+tools.illinktests+tools.cdactests</AllSubsetsExpansion>
+    <AllSubsetsExpansion>$(AllSubsetsExpansion)+host.native+host.pkg+host.tools+host.pretest+host.tests</AllSubsetsExpansion>
+    <AllSubsetsExpansion>$(AllSubsetsExpansion)+libs.native+libs.sfx+libs.oob+libs.pretest+libs.tests</AllSubsetsExpansion>
+    <AllSubsetsExpansion>$(AllSubsetsExpansion)+packs.product+packs.installers+packs.tests</AllSubsetsExpansion>
+    <AllSubsetsExpansion>$(AllSubsetsExpansion)+regeneratedownloadtable+regeneratethirdpartynotices+tasks+bootstrap</AllSubsetsExpansion>
   </PropertyGroup>
 
   <PropertyGroup>
+    <_subset>$(_subset.Replace('+allsubsets+', '+$(AllSubsetsExpansion)+'))</_subset>
     <_subset>$(_subset.Replace('+clr.paltests+', '+clr.paltests+clr.paltestlist+'))</_subset>
     <_subset>$(_subset.Replace('+clr+', '+$(DefaultCoreClrSubsets)+'))</_subset>
     <_subset>$(_subset.Replace('+clr.aot+', '+$(DefaultNativeAotSubsets)+'))</_subset>
@@ -264,6 +278,9 @@
     <SubsetName Include="tasks" OnDemand="true" Description="Build the repo local task projects." />
     <SubsetName Include="bootstrap" OnDemand="true" Description="Build the projects needed to build shipping assets in the repo against live assets." />
 
+    <!-- AllSubsets option to include everything -->
+    <SubsetName Include="AllSubsets" Description="Includes all available subsets for comprehensive restore/build operations. This includes all regular subsets and on-demand subsets." />
+
   </ItemGroup>
 
   <!-- Default targets, parallelization and configurations. -->