Don't rely on USERPROFILE to find the path to dotnet.exe (#803)

Author: natemcmaster

build/dependencies.props

@@ -21,6 +21,7 @@
     <MicrosoftBuildUtilitiesCorePackageVersion>15.6.82</MicrosoftBuildUtilitiesCorePackageVersion>
     <MicrosoftExtensionsBuffersMemoryPoolSourcesPackageVersion>2.2.0-preview1-34066</MicrosoftExtensionsBuffersMemoryPoolSourcesPackageVersion>
     <MicrosoftExtensionsBuffersSourcesPackageVersion>2.2.0-preview1-34066</MicrosoftExtensionsBuffersSourcesPackageVersion>
+    <MicrosoftExtensionsCommandLineUtilsSourcesPackageVersion>2.2.0-preview1-34066</MicrosoftExtensionsCommandLineUtilsSourcesPackageVersion>
     <MicrosoftExtensionsConfigurationEnvironmentVariablesPackageVersion>2.2.0-preview1-34066</MicrosoftExtensionsConfigurationEnvironmentVariablesPackageVersion>
     <MicrosoftExtensionsConfigurationJsonPackageVersion>2.2.0-preview1-34066</MicrosoftExtensionsConfigurationJsonPackageVersion>
     <MicrosoftExtensionsLoggingAbstractionsPackageVersion>2.2.0-preview1-34066</MicrosoftExtensionsLoggingAbstractionsPackageVersion>

test/IISIntegration.FunctionalTests/IISIntegration.FunctionalTests.csproj

@@ -10,13 +10,14 @@
 
   <ItemGroup>
     <ProjectReference Include="..\..\src\Microsoft.AspNetCore.Server.IISIntegration\Microsoft.AspNetCore.Server.IISIntegration.csproj" />
-    <ProjectReference Include="..\WebSites\**\*.csproj" >
+    <ProjectReference Include="..\WebSites\**\*.csproj">
       <ReferenceOutputAssembly>False</ReferenceOutputAssembly>
     </ProjectReference>
   </ItemGroup>
 
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.Server.IntegrationTesting" Version="$(MicrosoftAspNetCoreServerIntegrationTestingPackageVersion)" />
+    <PackageReference Include="Microsoft.Extensions.CommandLineUtils.Sources" Version="$(MicrosoftExtensionsCommandLineUtilsSourcesPackageVersion)" />
     <PackageReference Include="Microsoft.Extensions.Logging" Version="$(MicrosoftExtensionsLoggingPackageVersion)" />
     <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="$(MicrosoftExtensionsLoggingConsolePackageVersion)" />
     <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="$(MicrosoftExtensionsLoggingDebugPackageVersion)" />

test/IISIntegration.FunctionalTests/Inprocess/StartupTests.cs

@@ -1,19 +1,18 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
 using System;
-using System.Collections.Generic;
 using System.IO;
-using System.Linq;
 using System.Net;
-using System.Threading;
 using System.Threading.Tasks;
-using System.Xml.Linq;
 using Microsoft.AspNetCore.Server.IntegrationTesting;
+using Microsoft.Extensions.CommandLineUtils;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Logging.Testing;
 using Xunit;
 using Xunit.Abstractions;
 using Xunit.Sdk;
 
-
 namespace Microsoft.AspNetCore.Server.IISIntegration.FunctionalTests
 {
     public class StartupTests : LoggedTest
@@ -26,16 +25,20 @@ public StartupTests(ITestOutputHelper output) : base(output)
         [Fact]
         public async Task ExpandEnvironmentVariableInWebConfig()
         {
-            var architecture = RuntimeArchitecture.x64;
-            var dotnetLocation = $"%USERPROFILE%\\.dotnet\\{architecture.ToString()}\\dotnet.exe";
+#if NET461
+            // use the dotnet on PATH
+            var dotnetLocation = "dotnet";
+#else
+            var dotnetLocation = DotNetMuxer.MuxerPathOrDefault();
+#endif
             using (StartLog(out var loggerFactory))
             {
                 var logger = loggerFactory.CreateLogger("HelloWorldTest");
 
                 var deploymentParameters = GetBaseDeploymentParameters();
 
                 // Point to dotnet installed in user profile.
-                deploymentParameters.EnvironmentVariables["DotnetPath"] = Environment.ExpandEnvironmentVariables(dotnetLocation); // Path to dotnet.
+                deploymentParameters.EnvironmentVariables["DotnetPath"] = dotnetLocation;
 
                 using (var deployer = ApplicationDeployerFactory.Create(deploymentParameters, loggerFactory))
                 {
@@ -72,7 +75,7 @@ public async Task InvalidProcessPath_ExpectServerError()
             {
                 var logger = loggerFactory.CreateLogger("HelloWorldTest");
                 var deploymentParameters = GetBaseDeploymentParameters();
-                
+
                 // Point to dotnet installed in user profile.
                 deploymentParameters.EnvironmentVariables["DotnetPath"] = Environment.ExpandEnvironmentVariables(dotnetLocation); // Path to dotnet.
 
@@ -101,7 +104,7 @@ public async Task StandaloneApplication_ExpectCorrectPublish()
             using (StartLog(out var loggerFactory))
             {
                 var logger = loggerFactory.CreateLogger("HelloWorldTest");
-                
+
                 var deploymentParameters = GetBaseDeploymentParameters();
 
                 using (var deployer = ApplicationDeployerFactory.Create(deploymentParameters, loggerFactory))
@@ -171,7 +174,7 @@ public async Task StandaloneApplication_AbsolutePathToExe_ExpectCorrectPublish()
 #else
 #error Target frameworks need to be updated
 #endif
-        
+
         [Fact]
         public async Task DetectsOveriddenServer()
         {