Move to V3 publishing

[benvillalobos]

Context

V3 publishing is much faster and is required for publishing to the "VS 17.0" channel.

Changes Made

Followed this: https://github.com/dotnet/arcade/blob/main/Documentation/CorePackages/Publishing.md#how-to-upgrade-from-v2-to-v3

Add eng\publishing.props with single propertygroup PublishingVersion set to 3.
Pass publishingInfraVersion: 3 to post-build yml.

Testing

Should launch an exp/ branch to verify this

Added exp/bevillal/v3-publish-test as a default channel to "VS 17.0" and kicked off a pipeline build here: https://dev.azure.com/devdiv/DevDiv/_build/results?buildId=4655204&view=results

• Remove exp/bevillal/v3-publish-test as a default channel from "VS 17.0"

[benvillalobos]

Looks like it works: https://dev.azure.com/devdiv/DevDiv/_build/results?buildId=4667988&view=results

[epananth]

The build did not kick off maestro promotion pipeline. I checked the darc get-build

darc get-build --id 86878
Repository:    https://dev.azure.com/devdiv/DevDiv/_git/DotNet-msbuild-Trusted
Branch:        refs/heads/bevillal/v3-publish-test
Commit:        be418e2d9904cd12548d6b64b1a68effcf3bae8f
Build Number:  20210420.1
Date Produced: 4/19/2021 4:40 PM
Build Link:    https://dev.azure.com/devdiv/DevDiv/_build/results?buildId=4667988
BAR Build Id:  86878
Released:      False
Channels:

The build is using the azdo internal repo url instead of the translated github url.

Is there any reason why we cannot get the latest from .NET Eng - Latest channel?

[benvillalobos]

@epananth That would be pending #6143, as we're not on net6.0 just yet.

[benvillalobos]

@epananth I think your concern would be solved by this PR: dotnet/arcade#7267

[benvillalobos]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[epananth]

@MattGal is making a fix in arcade-validation to get this unblocked. I was able to test the changes he merged

https://dev.azure.com/devdiv/DevDiv/_build/results?buildId=4677589&view=results

[epananth]

It will be good to run a test again..

[epananth]

Yaaay! finally :)