kotlin-gradle-plugin-api/org.jetbrains.kotlin.gradle.tasks/KotlinCompileTool/sources

sources

@get:InputFiles
@get:SkipWhenEmpty
@get:IgnoreEmptyDirectories
@get:NormalizeLineEndings
@get:PathSensitive(value = PathSensitivity.RELATIVE)
abstract val sources: FileCollection

The configured task inputs (for example, Kotlin sources) which are used to produce a task artifact.