[release/9.0.1xx-rc1] [maestro] setup direct subscription for dotnet/runtime

[jonathanpeppers]

Changes: dotnet/runtime@fe0cfd5...c4a7987

.NET 9 RC 1 will include security fixes, so the very latest builds will be internal. As a way for us to test the newest possible public builds, we can update dotnet/runtime ahead of dotnet/sdk.

To do this:

• Remove CoherentParentDependency="Microsoft.NET.Sdk" from eng/Version.Details.xml.

• Find a commit at: https://github.com/dotnet/runtime/commits/release/9.0-rc1

• Get the BAR build id for the commit:

    > darc get-build --repo dotnet/runtime --commit c4a79875fcb2c76b2e92ff50940d4ea9264e2eeb
    Repository:    https://github.com/dotnet/runtime
    Branch:        release/9.0-rc1
    Commit:        c4a79875fcb2c76b2e92ff50940d4ea9264e2eeb
    Build Number:  20240821.1
    Date Produced: 8/21/2024 7:33 AM
    AzDO Build Id: 2520584
    BAR Build Id:  235694
    Released:      False
    Channels:
    - .NET 9 RC 1

• Get the latest update:

    > darc update-dependencies --id 235694
    Looking up build with BAR id 235694
    Updating 'Microsoft.NETCore.App.Ref': '9.0.0-rc.1.24420.11' => '9.0.0-rc.1.24421.1' (from build '20240821.1' of 'https://github.com/dotnet/runtime')
    Checking for coherency updates...
    Using 'Strict' coherency mode. If this fails, a second attempt utilizing 'Legacy' Coherency mode will be made.
    Updating 'Microsoft.NET.Workload.Emscripten.Current.Manifest-9.0.100.Transport': '9.0.0-rc.1.24416.2' => '9.0.0-rc.1.24420.5' to ensure coherency with Microsoft.NETCore.App.Ref@9.0.0-rc.1.24421.1
    Local dependencies updated based on build with BAR id 235694 (20240821.1 from https://github.com/dotnet/runtime@release/9.0-rc1)

After this is merged, we can add a new daily subscription, such as:

darc add-subscription --channel ".NET 9 RC 1" --target-branch "release/9.0.1xx-rc1" --source-repo https://github.com/dotnet/runtime --target-repo https://github.com/dotnet/android

[jonathanpeppers]

/cc @rolfbjarne you might want to setup something similar for xamarin/xamarin-macios.

[jonathanpeppers]

Looks like this is working, from the build log:

         Writing workload pack installation record for Microsoft.NETCore.App.Runtime.Mono.android-x86 version 9.0.0-rc.1.24421.1...
         Installing pack Microsoft.NET.Runtime.MonoAOTCompiler.Task version 9.0.0-rc.1.24421.1...