Any idea why I need to specify the version explicitely if I depend on `kotlin-stdlib-jdk8` but not ...

# gradle

[mbonnin]

Any idea why I need to specify the version explicitely if I depend on kotlin-stdlib-jdk8 but not for plain kotlin-stdlib ?
implementation("org.jetbrains.kotlin:kotlin-stdlib") works but implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8") doesn't

[octylFractal]

How are you specifying the version otherwise? via the plugin, or using the BOM?

[mbonnin]

What is BOM ?

[mbonnin]

I have classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.41") in my root build.gradle.kts. I guess this is where the version comes from

[octylFractal]

https://mvnrepository.com/artifact/org.jetbrains.kotlin/kotlin-bom/1.3.41

Bill Of Materials, specifies version for all artifacts. Gradle supports this by doing implementation(platform("org.jetbrains.kotlin:kotlin-bom:1.3.41"))

[mbonnin]

Ah, nope, I'm not using that

[octylFractal]

I think if you're using the plugin, and Kotlin DSL, the preferred way to get the version automatically is to do implementation(kotlin("stdlib-jdk8"))

[mbonnin]

Yep, that's the thing that doesn't work

[mbonnin]

ERROR: Failed to resolve: org.jetbrains.kotlin:kotlin-stdlib-jdk8:
Affected Modules: app

[mbonnin]

The kotlin() shorthand just prepends "org.jetbrains.kotlin", it does not add version

[Sergey Chelombitko]

@mbonnin are you using Kotlin JVM plugin or Kotlin Android plugin?

[mbonnin]

id("kotlin-android")

[mbonnin]

Kotlin Android it is

[Sergey Chelombitko]

Kotlin Android plugin doesn't allow to omit version of kotlin-stdlib* until 1.3.50

[Sergey Chelombitko]

or any other libraries in org.jetbrains.kotlin group

[mbonnin]

The this is it allows me to omit the version of kotlin-stdlib

[Sergey Chelombitko]

That's coincidence because there was simply no such feature in Kotlin Android plugin. I know this because I ported it from JVM plugin to Android plugin.

[octylFractal]

kotlin-stdlib may be an transitive dependency of another kotlin-android library, and therefore doesn't need a version. I don't recall exactly how gradle handles that case.

[mbonnin]

Ah yes, good catch. It seems the kotlin-android-extensions plugin pulls org.jetbrains.kotlin:kotlin-android-extensions-runtime:1.3.41 and that in turns pull kotlin-stdlib

[mbonnin]

So I can just remove implementation("org.jetbrains.kotlin:kotlin-stdlib") but if I need jdk8 I have to specify the version. It all makes sense, thanks!