I have a question (I'm using Kotlin Gradle plugin 1.4.21): If my only dependency is

testImplementation 'org.jetbrains.kotlin:kotlin-test-junit'

, it seems that I don't have to specify a version! Why? I don't have the Kotlin BOM specified either. Only the

kotlin-test

dep. And of course the Kotlin Gradle plugin. I know that this version automatically provides the

kotlin-stdlib

version including the variant (e.g. JDK8), but judging by this behaviour, it also seems that it provides some kind of Kotlin BOM platform (or at least version constraints) for the

kotlin-test

dep (and who knows what others). How does this work? And is it ok to rely on the Kotlin Gradle Plugin version for the

kotlin-test

dependency?

Single safe mode - use similar versions of: 1. Kotlin Gradle plugin 2. Kotlin Gradle serialization plugin 3. Kotlin stdlibs 4. Kotlin standard test libs Other combinations - “lucky mode”

Thanks, that makes sense. So is there any source where that sort-of Kotlin BOM is defined in the plugin can be found?

"BOM" will look like this - https://github.com/turansky/kfc-plugins/blob/87275a5b277bdd1c21269d3df2fb38916410a8d1/build.gradle.kts#L21

The Kotlin sources are hard to browse for the exact definition of these dependencies/constraints. At least for me.

@Erik https://github.com/JetBrains/kotlin/blob/1.4.20/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/internal/KotlinDependenciesManagement.kt#L47-L57

Thanks