How to read a val in plugins {}

[redtankd]

val kotlinVersion = "1.2.31"

plugins {
    kotlin("jvm")           version $kotlinVersion apply false
    kotlin("plugin.spring") version $kotlinVersion apply false
}

gradle report "Unresolved reference: kotlinVersion"

[JLLeitschuh]

The pluginsblock is special, you can't read variables inside of it.
You can use the pluginResolution block in the settings file to use variables from properties and things like that.

[eskatos]

Closing as duplicate of #158

[ice1000]

So if I want to reuse the variable kotlinVersion which is outside of the plugins block, how can I achieve that?

[ice1000]

var kotlinVersion: String by extra
kotlinVersion = if (isCI) "1.2.40-eap-61" else "1.2.31"

plugins {
	idea
	java
	application
	id("org.jetbrains.intellij") version "0.3.1"
	id("de.undercouch.download") version "3.4.2"
	kotlin("jvm") version "1.2.31" // I want to reuse the variable here
}

[StefMa]

@ice1000
I bet you want to reuse the kotlin variable because you need it for the kotlin dependency, right?
In my current project I have the following setup:
(It is in Groovy, but you can archive the same with Kotlin I think)

buildSrc/src/main/kotlin/some/package/Version.kt:

object Versions {

    object Plugin {
        val kotlin = "1.2.31"
    }

    object Dependency {
        val kotlin = = Plugin.kotlin
    }
}

settings.gradle:

import some.package.Versions

pluginManagement {
    resolutionStrategy {
        eachPlugin {
            if (requested.id.id.startsWith("org.jetbrains.kotlin.")) {
                it.useVersion(Versions.Plugin.kotlin)
            }
        }
    }
}

If you have setup this you can simply omit the version in the plugins block:

plugins {
  ...
  kotlin("jvm")
}

In your dependency block you can simply say:

import some.package.Versions.Dependency 

dependencies {
  implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$Dependency.kotlin"
}

[ice1000]

Wow cool! I love this, countless thanks! @StefMa