gradle kotlin dsl - How to configure dependencies for subprojects

Question

I'm creating gradle multi project for kotlin programming.

When I create dependencies under subprojects in main project build.gradle.kts I'm getting error Configuration with name 'implementation' not found.

Below is my configuration -

    plugins {
        kotlin("jvm") version "1.3.61" apply false
    }

    subprojects {   
        dependencies {
            val implementation by configurations
            implementation(kotlin("stdlib-jdk8"))
        }
    }

Once I move the plugins and dependencies into subproject build.gradle.kts then it is working fine. How can I make dependencies under subprojects work fine?

Code is on github.

score 22 · Accepted Answer · answered May 05 '20 at 19:49

22

With Kotlin dsl, you can add your dependencies as long as you use either apply(plugin = "org.jetbrains.kotlin.jvm") or apply(plugin = "java").

Those needs to be where you put your dependencies { .. }, usually inside a subprojects { .. }.

So here would be a simple build.gradle.kts that would propagate the kotlin dependency in all its subprojects.

plugins {
    kotlin("jvm") version "1.3.50"
}

repositories {
    mavenCentral()
}

subprojects {
   apply(plugin = "org.jetbrains.kotlin.jvm")

   dependencies {
      implementation(kotlin("stdlib-jdk8"))
   } 

   tasks.withType<KotlinCompile> {
       kotlinOptions {
           freeCompilerArgs = listOf("-Xjsr305=strict")
           jvmTarget = "11"
       }
   }

}

(You would still need to have the kotlin plugin, however no need to specify the version in the other subproject once defined at the root)

answered May 05 '20 at 19:49

Sylhare

5,907
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A simple question I'm hoping you can answer - why do we need to reapply the kotlin plugin at the subprojects level even after applying it in the root project level with the plugins block? – Pastafarian Jan 15 '21 at 22:37
1

It was at the time a limitation from the gradle [documentation](https://docs.gradle.org/current/userguide/kotlin_dsl.html?_ga=2.52221289.1756720240.1610986438-823552276.1554568232#type-safe-accessors). To apply the plugin to all projects you could try `allprojects{ kotlin("jvm") version "1.3.50" }` – Sylhare Jan 18 '21 at 16:17
2

this helped me after a few hours of trying to make it all running.. thanks @sylhare! however, I still can't put `implementation` without quotation marks because Gradle reports an error: "Unresolved reference: implementation"; to make it running I had to add `val implementation by configurations` before my `dependencies { }` declaration – Maciej Tułaza Jun 06 '22 at 10:17

score 4 · Answer 2 · edited Jul 02 '20 at 19:11

4

Adding the below configuration worked for me

  buildscript {
     repositories {
        maven {
        url = uri("https://plugins.gradle.org/m2/")
        }
     }
     dependencies {
        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.61")
     }
  }

  subprojects {
    apply(plugin = "java")
    apply(plugin = "org.jetbrains.kotlin.jvm")

    dependencies {
        val implementation by configurations
        implementation(kotlin("stdlib-jdk8"))
    }
  }

edited Jul 02 '20 at 19:11

Sylhare

5,907
8
64
80

answered Dec 23 '19 at 20:12

user51

8,843
21
79
158

1

At least for me, it doesn't need `apply(plugin = "java")` – silentorb Feb 11 '20 at 04:23

score 0 · Answer 3 · answered Oct 05 '22 at 00:11

In your root build.gradle.kts you can also exclude projects if you want:

subprojects {
    if (!project.name.contains("ios")) {
       apply("${rootDir}/ktlint.gradle.kts")
       apply(plugin = "org.jetbrains.kotlinx.kover")
       apply(plugin = "com.diffplug.spotless")
    }
}

score 0 · Answer 4 · answered Mar 08 '23 at 03:08

0

This is the way to do it:

plugins {
    id("org.jetbrains.kotlin.jvm") version "1.7.20"
}

allprojects {
    apply(plugin = "org.jetbrains.kotlin.jvm")
}

answered Mar 08 '23 at 03:08

Ilya Gazman

31,250
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gradle kotlin dsl - How to configure dependencies for subprojects

4 Answers4