setting the classes output dir for kotlin doesn’t seem to work (using

gradle-4.1

)

sourceSets.main.output.classesDir =  new File(buildDir, “classes/main”)
sourceSets.main.kotlin.outputDir =  new File(buildDir, “classes/main”)

First, using a single classes directory (setting

sourceSets.main.output.classesDir

) is considered deprecated since Gradle 4.0, the builds should support separate classes directories for the JVM languages (the file collection is

sourceSets.main.output.classesDirs

). As to the destination directory that Kotlin uses, you can set it with

compileKotlin.destinationDir = ...

. Though the fact that

sourceSets.main.kotlin.outputDir = ...

doesn't work seems to be a bug, I'll check it.

yes, but

classesDirs

is immutable afaik, I

With the Kotlin 1.1.4-3 plugin, you can make Kotlin fall back to unified classes directories by adding

kotlin.copyClassesToJavaOutput = true

to your build script (https://youtrack.jetbrains.com/issue/KT-19774), this will make

sourceSets.main.output.classesDir =  new File(buildDir, "classes/main")

work.

great! you actually saved the day. many thanks