[ksp] java.lang.IllegalArgumentException: this and base files have different roots

[mtrakal]

KSP didn't respect gradle buildDir variable.

Using RAM disk (Z: drive) for build folders:

USER_HOME/.gradle/init.gradle

allprojects {
    buildDir="Z:/build/$group/$name/"
}

app/build.gradle

android {
    sourceSets {
        androidTest.assets.srcDirs += files("$projectDir/schemas".toString())

        main.kotlin.srcDirs += '$buildDir/generated/ksp/$name/kotlin/'
        test.kotlin.srcDirs += '$buildDir/generated/ksp/$name/kotlin/'
    }

    buildTypes {
       // https://github.com/InsertKoinIO/koin-annotations
        applicationVariants.all { variant ->
            variant.sourceSets.java.each {
                it.srcDirs += "$buildDir/generated/ksp/${variant.name}/kotlin/"
            }
        }
   }
}

But build failed with:

e: [ksp] java.lang.IllegalArgumentException: this and base files have different roots: Z:\build\ProjectX\app\generated\ksp\stagingDebug\java\cz\packagename\data\database\dao\UserOauthDao_Impl.java and D:\Projects\company\ProjectX\app.
	at kotlin.io.FilesKt__UtilsKt.toRelativeString(Utils.kt:117)
	at kotlin.io.FilesKt__UtilsKt.relativeTo(Utils.kt:128)
	at com.google.devtools.ksp.processing.impl.CodeGeneratorImpl.associate(CodeGeneratorImpl.kt:119)
	at com.google.devtools.ksp.processing.impl.CodeGeneratorImpl.createNewFile(CodeGeneratorImpl.kt:92)
	at androidx.room.compiler.processing.ksp.KspFiler.createNewFile(KspFiler.kt:106)
	at androidx.room.compiler.processing.ksp.KspFiler.write(KspFiler.kt:41)
	at androidx.room.compiler.processing.XFilerKt.writeTo(XFiler.kt:44)
	at androidx.room.compiler.processing.XFilerKt.writeTo$default(XFiler.kt:43)
	at androidx.room.writer.ClassWriter.write(ClassWriter.kt:75)
	at androidx.room.DatabaseProcessingStep.process(DatabaseProcessingStep.kt:111)
	at androidx.room.DatabaseProcessingStep.process(DatabaseProcessingStep.kt:42)

[changfeng1050]

I have come across this problem too. And found no method to solve it. So I have to continue to use kapt. I prefer to use ramdisk other then ksp.

[xBlackCat]

Any progress on the issue?

[mtrakal]

@neetopia could you, please, set new milestone? 1.0.9 was already released (with only 56% complete) and this was not fixed... Still valid.

[SysoenkovDmitry]

Change projects to use same drives (root path).
For example D:\Projects\company and D:\Projects\build\ProjectX

[xBlackCat]

@SysoenkovDmitry , your suggestion is completely ruined idea of using RAM disk or other possible configurations of gradle. Also, since KSP 2.0 it is not allowed to have gradle data cache folder and project folder on different drives. If gradle annd its data folder are located on drive D: and project is on drive P: the configuration also causing the same exception "with different roots"

Gradle configuration could be very flexible and KSP plugin totally disallow to use any flexibility provided by gradle.

Could it possible to use FilesKt__UtilsKt.toRelativeString method with fallback to absolute path if relative could not be calculated?

[est7]

Many Windows users face an issue where their Gradle path doesn't match their project path.This issue should be looked at

[xBlackCat]

Any progress on the three-years-old issue?