From a45cc2cb827e7e3842280d5fe54e19ea15ec8f6e Mon Sep 17 00:00:00 2001
From: Nate McMaster <natemcmaster@users.noreply.github.com>
Date: Thu, 11 Oct 2018 14:47:58 -0700
Subject: [PATCH] Share DOTNET_HOME with sub-repo builds (#1488)

This shares the DOTNET_HOME variable on CI builds between Universe and each sub-repo build. This prevents each repository build installing duplicate copies of .NET Core SDK and runtimes.
---
 build/RepositoryBuild.targets | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/build/RepositoryBuild.targets b/build/RepositoryBuild.targets
index 23dadbcd76..be43e8dc75 100644
--- a/build/RepositoryBuild.targets
+++ b/build/RepositoryBuild.targets
@@ -69,6 +69,9 @@
     <PropertyGroup>
       <SkipTestsDueToMissingSharedFx Condition="'$(InstallSharedRuntimeFromPreviousBuild)' != 'true' And '$(TestsRequiredTheSharedRuntime)' == 'true' ">true</SkipTestsDueToMissingSharedFx>
 
+      <RepositoryBuildArguments Condition="'$(CI)'== 'true'">$(RepositoryBuildArguments) -ci</RepositoryBuildArguments>
+      <RepositoryBuildArguments Condition="'$(CI)'== 'true' AND '$(OS)' != 'Windows_NT'">$(RepositoryBuildArguments) --dotnet-home '$(DOTNET_HOME)'</RepositoryBuildArguments>
+      <RepositoryBuildArguments Condition="'$(CI)'== 'true' AND '$(OS)' == 'Windows_NT'">$(RepositoryBuildArguments) -DotNetHome '$(DOTNET_HOME)'</RepositoryBuildArguments>
       <!-- Should reduce allowable package feeds to only nuget.org. -->
       <RepositoryBuildArguments>$(RepositoryBuildArguments) /p:AspNetUniverseBuildOffline=true</RepositoryBuildArguments>
       <!-- If there are duplicate properties, the properties which are defined later in the order would override the earlier ones -->