Build.SourceVersion is blank in VSO vNext Build

Question

I am using the new scriptable build features in Visual Studio Online (not the XAML build definitions), and I am trying to have the build version number include the latest Gi

Answer 1

I was able to use $(Build.SourceVersion), but only when builds were triggered automatically on commit (on Continuous integration). It turns out to be empty only if I queue it manually:

I'm using the following Build number format:

$(BuildDefinitionName)_$(date:yyyyMMdd)_$(Build.BuildId).$(Build.SourceVersion)$(rev:.r)