[jira] [Created] (SPARK-40797) Force grouped import onto single line with Scalafmt

["Martin Grund (Jira)" <ji...@apache.org>]

Martin Grund created SPARK-40797:
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             Summary: Force grouped import onto single line with Scalafmt
                 Key: SPARK-40797
                 URL: https://issues.apache.org/jira/browse/SPARK-40797
             Project: Spark
          Issue Type: Improvement
          Components: Build
    Affects Versions: 3.4.0
            Reporter: Martin Grund


When using the scalafmt.conf file as provided by the project repository to organize and optimize imports there is a case in which un-desired behavior appears.

If the import group does not fit on a single line, Scalafmt will by default try to bin-pack and then break out over mulitple lines.

For example:
import org.apache.spark.sql.catalyst.analysis.\{UnresolvedAlias, UnresolvedAttribute, UnresolvedFunction, UnresolvedRelation, UnresolvedStar}{{{}{}}}will become
import org.apache.spark.sql.catalyst.analysis.\{
  UnresolvedAlias,
  UnresolvedAttributed,
  ...
}{{{}{}}}In previous code reviews this has been marked as departing from the consistency of the Spark code base even when using the provided scalafmt.conf.
 
Scalafmt allows to configure this by setting an option 
 
{code:java}
importSelectors = "singleLine"{code}
 



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