build with final sdk

Author: clairernovotny

azure-pipelines.ix.yml

@@ -31,12 +31,47 @@ stages:
     pool:
       vmImage: ubuntu-latest
     steps:
-    - task: UseDotNet@2
-      displayName: Use .NET Core 5.0.x SDK
-      inputs:
-        version: 5.0.x
-        includePreviewVersions: true
+    # - task: UseDotNet@2
+    #   displayName: Use .NET Core 5.0.x SDK
+    #   inputs:
+    #     version: 5.0.x
+    #     includePreviewVersions: true
+    - pwsh: |
+        $branch = "release/5.0.1xx"
+        $scriptPath = Join-Path $env:AGENT_TOOLSDIRECTORY dotnet-install.ps1
+        Invoke-WebRequest -OutFile $scriptPath https://raw.githubusercontent.com/dotnet/install-scripts/master/src/dotnet-install.ps1
+        &"$scriptPath" -Channel $branch
+
+        $configFile = Join-Path $env:AGENT_TOOLSDIRECTORY NuGet-darc.config
+        # Get the darc feeds needed
+        Invoke-WebRequest -OutFile $configFile "https://raw.githubusercontent.com/dotnet/installer/$branch/NuGet.config"
+
+        [xml]$nugetConfig = Get-Content $configFile
+        $darcNodes = $nugetConfig.SelectNodes("/configuration/packageSources/add[starts-with(@key, 'darc-')]")
+        
+        $installationPath = Join-Path $env:AGENT_TOOLSDIRECTORY dotnet
+
+        Write-Host "##vso[task.setvariable variable=DOTNET_ROOT]$installationPath"
+
+        # Enable multi-level lookup to fall back to the built-in SDK's for older versions. Set to 0 to disable
+        Write-Host "##vso[task.setvariable variable=DOTNET_MULTILEVEL_LOOKUP]1"
+
+        # Make sure the new path is propagated back to the main host process 
+        Write-Host "##vso[task.setvariable variable=PATH]$env:PATH"
+
+        # Add the nightly NuGet feeds to the nuget config starting with the darc nodes
+        foreach ($feed in $darcNodes) {
+          $key = $feed.attributes['key'].value
+          $value = $feed.attributes['value'].value
+
+          Write-Host "Adding DARC feed '$key': $value"
+          dotnet nuget add source $value -n $key
+        }
+
+        dotnet nuget add source https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet5/nuget/v3/index.json -n dotnet5        
 
+      displayName: Intall .NET 5.0 SDK
+      
     - task: UseDotNet@2
       displayName: .NET Core 3.1 runtime
       inputs: