setting the classes output dir for kotlin doesn’t ...

# gradle

[masc3d]

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”)

[h0tk3y]

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.

[masc3d]

yes, but classesDirs is immutable afaik, I

[masc3d]

I would prefer to just use the defaults with IJ gradle delegation, but this is broken on windows, so I have to revert to unifying class output dirs for JVM languages + IJ as a last resort.

[masc3d]

https://youtrack.jetbrains.com/issue/IDEA-178417

[h0tk3y]

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.

[masc3d]

great! you actually saved the day. many thanks

[masc3d]

there’s new kind of breakage with gradle-4.2, kotlin.copyClassesToJavaOutput will not work when the project doesn’t contain java classes at all.