Offline builds fail trying to access online feeds

[MichaelSimons]

  /vmr/artifacts/source-built-sdks/Microsoft.DotNet.Arcade.Sdk/tools/Tools.proj : error NU1301: Unable to load the service index for source https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-public/nuget/v3/index.json.

Failing build (internal microsoft link) - https://dev.azure.com/dnceng/internal/_build/results?buildId=2373582&view=logs&j=a361eaf5-91c0-5b8d-1f36-c97d0865c360&t=8198a24c-af12-5a92-d480-67a88a3b425d

[mthalman]

I think this is what was fixed by dotnet/installer#18565. The full VMR build hasn't run since that came in. The lite pipeline is passing.

[ellahathaway]

For source build monitoring - the latest run of source-build-sdk-diff-tests is failing in all legs due to this issue; latest run cannot find any associated artifacts from the full build.

[MichaelSimons]

I think this is what was fixed by dotnet/installer#18565. The full VMR build hasn't run since that came in. The lite pipeline is passing.

I triggered a new run this morning after those changes. - I updated the linked build.

[MichaelSimons]

@jkoritzinsky, can you take a look?

[jkoritzinsky]

Looks like it's failing to find the Microsoft.Dotnet.SourceBuild.Tasks library locally. I'll try to figure out how this was working beforehand.