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package cbt
import java.io.File
import java.nio.file.FileSystems
import java.nio.file.Files._
import scalariform.formatter.ScalaFormatter
import scalariform.formatter.preferences.{ FormattingPreferences, Preserve }
import scalariform.parser.ScalaParserException
trait Scalariform extends BaseBuild {
def scalariform = Scalariform.apply(lib, scalaVersion).config(sourceFiles.filter(_.string endsWith ".scala"))
}
object Scalariform{
val defaultPreferences: FormattingPreferences = {
import scalariform.formatter.preferences._
FormattingPreferences()
.setPreference(AlignParameters, true)
.setPreference(AlignArguments, true)
.setPreference(AlignSingleLineCaseStatements, true)
.setPreference(MultilineScaladocCommentsStartOnFirstLine, true)
.setPreference(SpaceInsideParentheses, true)
.setPreference(SpacesWithinPatternBinders, true)
.setPreference(SpacesAroundMultiImports, true)
.setPreference(DoubleIndentClassDeclaration, false)
//.setPreference(NewlineAtEndOfFile, true)
.setPreference(DanglingCloseParenthesis, Preserve)
.setPreference(PlaceScaladocAsterisksBeneathSecondAsterisk, true)
}
case class apply( lib: Lib, scalaVersion: String ){
case class config(
files: Seq[File], preferences: FormattingPreferences = Scalariform.defaultPreferences
) extends (() => Seq[File]){
def apply = {
val (successes, errors) = lib.transformFilesOrError( files, in =>
try{
Right( ScalaFormatter.format( in, preferences, Some(scalaVersion) ) )
} catch {
case e: ScalaParserException => Left( e )
}
)
if(errors.nonEmpty)
throw new RuntimeException(
"Scalariform failed to parse some files:\n" ++ errors.map{
case (file, error) => file.string ++ ": " ++ error.getMessage
}.mkString("\n"),
errors.head._2
)
successes
}
}
}
}
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