Is it possible not to add a new line before a single parameter when it's a collection?

[oleksii-suprun]

This template is a guideline, not a strict requirement.

• Version: 2.5.3
• Integration: IntelliJ
• Configuration:

version = "2.5.3"
maxColumn = 120
align = none
project.git = true
runner.dialect = "Scala211"

includeNoParensInSelectChains = false

danglingParentheses.callSite = false

continuationIndent.defnSite = 2
continuationIndent.extendSite = 2
continuationIndent.withSiteRelativeToExtends = 2

newlines.implicitParamListModifierForce = [after]
newlines.afterCurlyLambda = squash
newlines.topLevelStatements = [before]
newlines.afterInfixBreakOnNested = true
newlines.source = keep
newlines.alwaysBeforeMultilineDef = false

rewrite.rules = [RedundantParens, SortModifiers, PreferCurlyFors, SortImports, RedundantBraces]
rewrite.redundantBraces.methodBodies = false
rewrite.redundantBraces.includeUnitMethods = true
rewrite.redundantBraces.stringInterpolation = true
rewrite.redundantBraces.generalExpressions = false
rewrite.sortModifiers.order = [
  "override", "private", "protected", "implicit", "final", "sealed", "abstract", "lazy"
]

verticalMultiline.atDefnSite = true
verticalMultiline.newlineAfterOpenParen = true
verticalMultiline.excludeDanglingParens = []

Steps

Given code like this:

      val schema = StructType(Seq(
        StructField("fieldA", DataTypes.StringType),
        StructField("fieldB", DataTypes.StringType)
      ))

When I run scalafmt like this:

scalafmt

Problem

Scalafmt formats code like this:

      val schema = StructType(
        Seq(
          StructField("fieldA", DataTypes.StringType),
          StructField("fieldB", DataTypes.StringType)
        ))

Expectation

I would like the formatted output to look like this:

      val schema = StructType(Seq(
        StructField("fieldA", DataTypes.StringType),
        StructField("fieldB", DataTypes.StringType)
      ))

Workaround

Not found. Looking for it.

Notes

I'm working a lot with Spark struct types. It's apply method takes a single collection parameter and I'd like to find a way to keep a collection type name on the same line with a StructType. Is there any possibility to do it?

[kitbellew]

please try newlines.source=fold.

[oleksii-suprun]

I tried it, but unfortunately, newlines.source=fold is too "greedy" to me. It transforms the following piece:

      val schema = StructType(Seq(
        StructField("fieldA", DataTypes.StringType),
        StructField("fieldB", DataTypes.StringType)
      ))

into the following (single line):

    val schema =
      StructType(Seq(StructField("fieldA", DataTypes.StringType), StructField("fieldB", DataTypes.StringType)))

In my config I have newlines.source = keep and I'm satisfied with it in most cases. This is the only thing which I'd like to change and I was not sure that I did not miss some option which can help me. But this is not critical I can live with a current implementation if it's impossible to change it somehow.