Shortcuts for configuring compiler

impl/build.gradle.kts

@@ -1,4 +1,5 @@
 import java.util.Properties
+import org.jetbrains.kotlin.gradle.dsl.KotlinVersion
 
 plugins {
 	kotlin("multiplatform") version "2.0.20"
@@ -23,12 +24,25 @@ repositories {
 kotlin {
 	explicitApi()
 	jvmToolchain(8)
+
+	targets.configureEach {
+		this.compilations.configureEach {
+			compileTaskProvider.configure {
+				this.compilerOptions {
+					this.languageVersion.set(KotlinVersion.KOTLIN_1_8)
+					this.apiVersion.set(KotlinVersion.KOTLIN_1_8)
+				}
+			}
+		}
+	}
+
 	jvm()
 
+
 	sourceSets {
 		jvmMain {
 			dependencies {
-				compileOnly("dev.gradleplugins:gradle-api:7.5.1")
+				compileOnly("dev.gradleplugins:gradle-api:${versions.getProperty("gradle")}")
 				compileOnly("org.jetbrains.kotlin:kotlin-gradle-plugin:${targetKotlinVersion}")
 			}
 		}
@@ -36,7 +50,6 @@ kotlin {
 }
 
 publishing {
-	// other settings of publication
 	repositories {
 		maven {
 			name = "XomrkMaven"
@@ -44,7 +57,7 @@ publishing {
 
 			credentials(HttpHeaderCredentials::class) {
 				name = "Authorization"
-				value = "token ${System.getenv("XOMRK_MAVEN_REPO_DEPLOY_TOKEN")}"
+				value = "token ${System.getenv("XOMRK_GITEA_MAVEN_REPO_DEPLOY_TOKEN")}"
 			}
 
 			authentication {

impl/src/jvmMain/kotlin/ru/landgrafhomyak/kotlin/kmp_gradle_build_helper/compilations.kt

@@ -0,0 +1,43 @@
+@file:JvmName("Compilations")
+
+package ru.landgrafhomyak.kotlin.kmp_gradle_build_helper
+
+import org.jetbrains.kotlin.gradle.dsl.KotlinCommonCompilerOptions
+import org.jetbrains.kotlin.gradle.dsl.KotlinCommonOptions
+import org.jetbrains.kotlin.gradle.dsl.KotlinMultiplatformExtension
+import org.jetbrains.kotlin.gradle.plugin.KotlinCompilation
+import org.jetbrains.kotlin.gradle.dsl.KotlinVersion
+
+public fun KotlinMultiplatformExtension.configureAllCompilations(action: KotlinCompilation<KotlinCommonOptions>.() -> Unit) {
+	this.targets.configureEach { t ->
+		t.compilations.configureEach(action)
+	}
+}
+
+public fun KotlinMultiplatformExtension.configureAllCompilersOptions(action: KotlinCommonCompilerOptions.() -> Unit) {
+	this.targets.configureEach { t ->
+		t.compilations.configureEach { c ->
+			c.compileTaskProvider.configure { t ->
+				t.compilerOptions(action)
+			}
+		}
+	}
+}
+
+public fun KotlinMultiplatformExtension.noWarnExpectActual(): Unit =
+	this.configureAllCompilersOptions { this@configureAllCompilersOptions.freeCompilerArgs.add("-Xexpect-actual-classes") }
+
+public fun KotlinMultiplatformExtension.warningsAsErrors(): Unit =
+	this.configureAllCompilersOptions { this@configureAllCompilersOptions.allWarningsAsErrors.set(true) }
+
+public fun KotlinMultiplatformExtension.optIn(classQualname: String): Unit =
+	this.configureAllCompilersOptions { this@configureAllCompilersOptions.optIn.add(classQualname) }
+
+public fun KotlinMultiplatformExtension.optInContracts(): Unit =
+	this.optIn("kotlin.contracts.ExperimentalContracts")
+
+public fun KotlinMultiplatformExtension.setCompatibilityWithKotlin(version: KotlinVersion): Unit =
+	this.configureAllCompilersOptions {
+		this@configureAllCompilersOptions.apiVersion.set(version)
+		this@configureAllCompilersOptions.languageVersion.set(version)
+	}

test/build.gradle.kts

@@ -1,5 +1,6 @@
 import ru.landgrafhomyak.kotlin.kmp_gradle_build_helper.defineAllMultiplatformTargets
 import ru.landgrafhomyak.kotlin.kmp_gradle_build_helper.defineXomrkGiteaMavenRepo
+import ru.landgrafhomyak.kotlin.kmp_gradle_build_helper.optInContracts
 
 buildscript {
 	val versions = java.util.Properties()
@@ -28,4 +29,5 @@ repositories {
 kotlin {
 	jvmToolchain(8)
 	defineAllMultiplatformTargets()
+	optInContracts()
 }

test/src/commonMain/kotlin/contracts_test.kt

@@ -0,0 +1,8 @@
+import kotlin.contracts.InvocationKind
+import kotlin.contracts.contract
+
+fun lambdaReceiver(f: () -> Unit) {
+	contract {
+		callsInPlace(f, InvocationKind.EXACTLY_ONCE)
+	}
+}