Support for short stack builds.

eng/pipelines/templates/stages/vmr-build.yml

@@ -360,6 +360,19 @@ stages:
             targetOS: osx
             targetArchitecture: x64
 
+        - template: ../jobs/vmr-build.yml
+          parameters:
+            buildName: Android_Shortstack
+            isBuiltFromVmr: ${{ parameters.isBuiltFromVmr }}
+            vmrBranch: ${{ variables.VmrBranch }}
+            architecture: x64
+            pool:
+              name: ${{ variables.defaultPoolName }}
+              demands: ${{ variables.defaultPoolDemandsLinux }}
+            container: ${{ variables.androidCrossContainer }}
+            targetOS: android
+            targetArchitecture: x64
+
     # Cross builds are currently failing
 
       # - template: ../jobs/vmr-build.yml

eng/pipelines/templates/variables/vmr-stage.yml

@@ -26,6 +26,8 @@ variables:
   value: mcr.microsoft.com/dotnet-buildtools/prereqs:cbl-mariner-2.0-cross-amd64
 - name: marinerArm64CrossContainer
   value: mcr.microsoft.com/dotnet-buildtools/prereqs:cbl-mariner-2.0-cross-arm64
+- name: androidCrossContainer
+  value: mcr.microsoft.com/dotnet-buildtools/prereqs:cbl-mariner-2.0-cross-android-amd64
 
 - ${{ if eq(variables['System.TeamProject'], 'public') }}:
   - name: defaultPoolName

src/SourceBuild/content/Directory.Build.props

@@ -19,6 +19,20 @@
     <TargetOS Condition="'$(TargetOS)' == ''">$(BuildOS)</TargetOS>
   </PropertyGroup>
 
+  <!-- This is a list of cases where we aren't producing a whole SDK, just a runtime. This list should be kept in sync with https://github.com/dotnet/runtime/blob/main/eng/SourceBuild.props#L26 -->
+  <PropertyGroup Label="ShortStacks">
+    <ShortStack Condition="'$(TargetOS)' == 'wasi'">true</ShortStack>
+    <ShortStack Condition="'$(TargetOS)' == 'browser'">true</ShortStack>
+    <ShortStack Condition="'$(TargetOS)' == 'ios'">true</ShortStack>
+    <ShortStack Condition="'$(TargetOS)' == 'iossimulator'">true</ShortStack>
+    <ShortStack Condition="'$(TargetOS)' == 'tvos'">true</ShortStack>
+    <ShortStack Condition="'$(TargetOS)' == 'tvossimulator'">true</ShortStack>
+    <ShortStack Condition="'$(TargetOS)' == 'maccatalyst'">true</ShortStack>
+    <ShortStack Condition="'$(TargetOS)' == 'android'">true</ShortStack>
+    <!-- Short stack builds stop at runtime, not the whole SDK -->
+    <RootRepo Condition="'$(ShortStack)' == 'true'">runtime</RootRepo>
+  </PropertyGroup>
+
   <PropertyGroup Label="CalculateArch">
     <BuildArchitecture>$([System.Runtime.InteropServices.RuntimeInformation]::ProcessArchitecture.ToString().ToLowerInvariant)</BuildArchitecture>
     <HostArchitecture Condition="'$(HostArchitecture)' == ''">$(BuildArchitecture)</HostArchitecture>
@@ -49,6 +63,8 @@
     <PortableRid Condition="'$(PortableRid)' == '' and '$(TargetOS)' == 'windows'">win-$(TargetArchitecture)</PortableRid>
 
     <TargetRid Condition="'$(PortableBuild)' == 'true' and '$(PortableRid)' != ''">$(PortableRid)</TargetRid>
+    <TargetRid Condition="'$(ShortStack)' == 'true' and '$(TargetOS)' != 'windows'">$(TargetOS)-$(TargetArchitecture)</TargetRid>
+    <TargetRid Condition="'$(ShortStack)' == 'true' and '$(TargetOS)' == 'windows'">win-$(TargetArchitecture)</TargetRid>
   </PropertyGroup>
 
   <Import Project="Sdk.props" Sdk="Microsoft.DotNet.Arcade.Sdk" Condition="'$(SkipArcadeSdkImport)' != 'true'" />

src/SourceBuild/content/repo-projects/runtime.proj

@@ -15,8 +15,8 @@
     <BuildArgs>$(BuildArgs) $(FlagParameterPrefix)arch $(TargetArchitecture)</BuildArgs>
     <BuildArgs>$(BuildArgs) $(FlagParameterPrefix)os $(TargetOS)</BuildArgs>
     <BuildArgs>$(BuildArgs) /p:TargetRid=$(TargetRid)</BuildArgs>
-    <BuildArgs>$(BuildArgs) /p:RuntimeOS=$(RuntimeOS)</BuildArgs>
-    <BuildArgs>$(BuildArgs) /p:BaseOS=$(BaseOS)</BuildArgs>
+    <BuildArgs Condition="'$(ShortStack)' != 'true'">$(BuildArgs) /p:RuntimeOS=$(RuntimeOS)</BuildArgs>
+    <BuildArgs Condition="'$(ShortStack)' != 'true'">$(BuildArgs) /p:BaseOS=$(BaseOS)</BuildArgs>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(DotNetBuildSourceOnly)' == 'true'">

src/SourceBuild/patches/runtime/0002-short-stack-support.patch

@@ -0,0 +1,41 @@
+--- a/eng/SourceBuild.props	2024-02-07 11:01:33.807337902 -0500
++++ b/eng/SourceBuild.props	2024-02-05 16:48:58.219933758 -0500
+@@ -15,6 +15,7 @@
+     <!-- Split e.g. 'fedora.33-x64' into 'fedora.33' and 'x64'. -->
+     <_targetRidPlatformIndex>$(TargetRid.LastIndexOf('-'))</_targetRidPlatformIndex>
+     <TargetArch>$(TargetRid.Substring($(_targetRidPlatformIndex)).TrimStart('-'))</TargetArch>
++    <TargetOS>$(TargetRid.Substring(0, $(_targetRidPlatformIndex)))</TargetOS>
+
+     <_hostRidPlatformIndex>$(_hostRid.LastIndexOf('-'))</_hostRidPlatformIndex>
+     <_hostArch>$(_hostRid.Substring($(_hostRidPlatformIndex)).TrimStart('-'))</_hostArch>
+@@ -22,6 +23,17 @@
+     <LogVerbosity Condition="'$(LogVerbosity)' == ''">minimal</LogVerbosity>
+   </PropertyGroup>
+
++  <PropertyGroup Label="ShortStacks">
++    <ShortStack Condition="'$(TargetOS)' == 'wasi'">true</ShortStack>
++    <ShortStack Condition="'$(TargetOS)' == 'browser'">true</ShortStack>
++    <ShortStack Condition="'$(TargetOS)' == 'ios'">true</ShortStack>
++    <ShortStack Condition="'$(TargetOS)' == 'iossimulator'">true</ShortStack>
++    <ShortStack Condition="'$(TargetOS)' == 'tvos'">true</ShortStack>
++    <ShortStack Condition="'$(TargetOS)' == 'tvossimulator'">true</ShortStack>
++    <ShortStack Condition="'$(TargetOS)' == 'maccatalyst'">true</ShortStack>
++    <ShortStack Condition="'$(TargetOS)' == 'android'">true</ShortStack>
++  </PropertyGroup>
++
+   <Target Name="GetRuntimeSourceBuildCommandConfiguration"
+           BeforeTargets="GetSourceBuildCommandConfiguration">
+     <PropertyGroup>
+@@ -29,9 +41,10 @@
+            This allows to build the repository using './build.sh <args> /p:DotNetBuildFromSource=true'.
+            Properties that control flags from source-build, and the expected output for source-build should be added to this file. -->
+       <InnerBuildArgs>$(InnerBuildArgs) $(FlagParameterPrefix)arch $(TargetArch)</InnerBuildArgs>
+-      <InnerBuildArgs Condition=" '$(TargetArch)' != '$(_hostArch)' ">$(InnerBuildArgs) $(FlagParameterPrefix)cross</InnerBuildArgs>
++      <InnerBuildArgs>$(InnerBuildArgs) $(FlagParameterPrefix)os $(TargetOS)</InnerBuildArgs>
++      <InnerBuildArgs Condition="'$(TargetArch)' != '$(_hostArch)' and '$(ShortStack)' != 'true'">$(InnerBuildArgs) $(FlagParameterPrefix)cross</InnerBuildArgs>
+       <InnerBuildArgs>$(InnerBuildArgs) $(FlagParameterPrefix)configuration $(Configuration)</InnerBuildArgs>
+-      <InnerBuildArgs>$(InnerBuildArgs) $(FlagParameterPrefix)allconfigurations</InnerBuildArgs>
++      <InnerBuildArgs Condition="'$(ShortStack)' != 'true'">$(InnerBuildArgs) $(FlagParameterPrefix)allconfigurations</InnerBuildArgs>
+       <InnerBuildArgs>$(InnerBuildArgs) $(FlagParameterPrefix)verbosity $(LogVerbosity)</InnerBuildArgs>
+       <InnerBuildArgs>$(InnerBuildArgs) $(FlagParameterPrefix)nodereuse $(ArcadeFalseBoolBuildArg)</InnerBuildArgs>
+       <InnerBuildArgs>$(InnerBuildArgs) $(FlagParameterPrefix)warnAsError $(ArcadeFalseBoolBuildArg)</InnerBuildArgs>