Not sure, maybe it’s somehow related that you have no version on your dependency, or maybe spring plugin somehow control it

Maybe you could reproduce it using sample project

hm... refering to it like

ext["kotlinVersion"] as String

worked. Ugly 😞

I like way with implicit version for dependencies. Apply Kotlin plugin in

plugins

block and than omit Kotlin version for other kotlin dependencies.

also, you can use gradle properties instead of extras, they are available for buildscript

I actually like to put this stuff into

buildSrc

so I get source navigation and proper completion

What kind of stuff? Version?

versions, dependency strings etc

i.e. (sorry for my Java 😄) I have something like this in `buildSrc/src/main/java/myapp/gradle/Deps.java`:

package myapp.gradle;

public class Deps {
    public static final String kotlinVersion = "1.1.50";
    public static final String kotlinPlugin = "org.jetbrains.kotlin:kotlin-gradle-plugin:" + kotlinVersion;
    public static final String kotlinRuntime = "org.jetbrains.kotlin:kotlin-stdlib-jre7:" + kotlinVersion;
}

and in a classic

build.gradle

file I can just do

import myapp.gradle.Deps

in the beginning of the file and everywhere else

Deps.kotlinPlugin

,

Deps.kotlinRuntime

etc

the nice thing is that I can still cmd-click to navigate to the definition, hover to see the value and I get proper autocompletion too

the not so nice thing is that I now have build configuration sitting in

buildSrc

which feels a bit iffy

But in case of kotlin you can just omit version and set it only to plugin

I'm trying to test kotlin 1.2-M2, but gradle throws error

KotlinCompile' is compiled by a pre-release version of Kotlin and cannot be loaded by this version of the compiler

Here's my gradle config

@Czar uploaded a file: build.gradle.kts

Does anyone have an example of Kotlin code encapsulated in Java 9 modules? I cannot seem to figure out how to configure

build.gradle.kts

. I'm using Gradle 4.2 and Kotlin 1.1.50

Gradle Kotlin DSL does not work with JDK 9 in the current release. It will be fixed in the next release. https://github.com/gradle/kotlin-dsl/issues/454

Hmm, the linked issue is closed

Yea, I fixed it. Its currently in the develop branch. Has not been released into a stable version of Gradle yet.

Also, given that you are able to get it to work and not blow up seems to indicate that you aren't running gradle with JDK 9. Are you sure you have your

$JAVA_HOME

variable set to JDK 9 correctly?

This works, but produces Java 6 compatible classes. It seems to ignore my "sourceCompatibility" and "targetCompatibility" config entirely.

I could be wrong. But I think the kotlin compiler always produces JDK 6 bytecode. Run

./gradlew -version

that will tell you what version of Java gradle is running. I think the only case where the kotlin compiler wont produce JDK 6 bytecode is when you enable the compiler flag to support generating JDK 8 compliant default methods on interfaces. @h0tk3y Am I correct or totally wrong?

Interesting, it seems Gradle picks the 1.8.0 one

gotta set the %JAVA_HOME% properly, brb

ok, now I new errors, which look like they're Java 9 related:

Cannot access class 'java.lang.String'. Check your module classpath for missing or conflicting dependencies

Thanks 🙂 I'll dig deeper

That's the Gradle bug. There is no workaround that we know of.

I understand It seems that changing the language levels of some compile tasks also changes the language level of the build script as well

Uhhhhh. No. I don't think at so

e: D:\Work\some-project\build.gradle.kts:9:8: Unresolved reference: java

and this line reads:

import java.net.URI

and this error does not occur when I remove

testCompilation.sourceCompatibility = "9"
testCompilation.targetCompatibility = "9"

etc.