fangchenli commented on PR #54371:
URL: https://github.com/apache/spark/pull/54371#issuecomment-3955288126

   I started looking into this because I want to enable Scala 3 support for 
Spark. Cross-compiling Scala 3 and 2.13 gets a lot easier if we separate the 
sbt build from Maven, so I tried that out (haven’t opened a PR yet), and it 
worked locally.
   
   Right now, I’m just relying on “all tests passing” as the only sign that 
things work. The goal of this PR is to add more ways to observe build outputs, 
so we can be more confident that the sbt build refactor didn’t introduce any 
subtle changes.
   
   Alternatively, I can keep this as a personal dev tool for now and focus on 
advancing the native sbt build. We could get that merged quickly and use it 
experimentally to monitor for potential issues. Once we’re confident in its 
stability, we could migrate the release process to sbt and make Spark an 
sbt-only project.
   
   xref: [SPARK-44173](https://issues.apache.org/jira/browse/SPARK-44173)


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