Is there a way to ignore certain errors in Kotlin ...

# gradle

[spierce7]

Is there a way to ignore certain errors in Kotlin Script Gradle?

I'm not sure if it's new in Gradle 8.x but we're seeing tons of Variable 'commonMain' is never used in our Kotlin multiplatform modules:

sourceSets {
        val commonMain by getting {
            dependencies {
            }
        }

It'd be nice if there was a way to ignore this error or turn it off for the whole project.

[ephemient]

it's not new. you can suppress the warnings with

@Suppress("UNUSED_VARIABLE")

but I just use

sourceSets {
        getByName("commonMain") {
            dependencies {
            }
        }

when the variable would be unused

[ephemient]

(`getting`/`getByName`, `creating`/`create`, `existing`/`named`, `registering`/`register`)

[Adam S]

since commonMain is created proactively in the Kotlin Multiplatform plugin, it should have a DSL accessor generated if you use .gradle.kts, so you can do

sourceSets {
  commonMain { // generated accessor
    ...
  }
}

[Adam S]

accessors for the source sets of other targets (or custom source sets) will be generated if you create a convention plugin for Kotlin Multiplatform and define all the targets/custom source sets in there. Gradle will then be able to generate accessors for them, so you could have

// buildSrc/src/main/kotlin/my-kotlin-mp-convention.gradle.kts

plugins {
  kotlin("multiplatform")
}

kotlin {
  jvm()
  
  sourceSets {
    create("foo") { ... }
  }
}

// my-subproject/build.gradle.kts

plugins {
  id("my-kotlin-mp-convention")
}

kotlin {
  sourceSets {
    jvmMain { }
    foo { }
  }
}

And just like that, no warnings about unused variables

[Emil Kantis]

TIL! That's really neat @Adam S, thanks for sharing 🙂