Removed Java configuration (#20)

- pure Kotlin application, removed jvmTarget configuration
- fixed serialization dependency for common module

Author: nulls

common/build.gradle.kts

@@ -1,5 +1,5 @@
 plugins {
-    id("com.saveourtool.template.build.kotlin-mpp-configuration")
+    id("com.saveourtool.template.build.kotlin-mpp-with-jvm-configuration")
 }
 
 kotlin {
@@ -8,7 +8,7 @@ kotlin {
     sourceSets {
         commonMain {
             dependencies {
-                implementation("org.jetbrains.kotlinx:kotlinx-serialization-core")
+                implementation(libs.kotlinx.serialization.core)
             }
         }
     }

gradle/libs.versions.toml

@@ -1,6 +1,6 @@
 [versions]
-java = "21"
 kotlin = "1.9.22"
+kotlin-serialization = "1.6.3"
 spring-boot = "3.2.3"
 springdoc = "2.3.0"
 
@@ -17,3 +17,5 @@ spring-boot-dependencies = { module = "org.springframework.boot:spring-boot-depe
 springdoc-openapi-starter-common = { module = "org.springdoc:springdoc-openapi-starter-common", version.ref = "springdoc" }
 springdoc-openapi-starter-webflux-ui = { module = "org.springdoc:springdoc-openapi-starter-webflux-ui", version.ref = "springdoc" }
 springdoc-openapi-starter-webmvc-ui = { module = "org.springdoc:springdoc-openapi-starter-webmvc-ui", version.ref = "springdoc" }
+
+kotlinx-serialization-core = { module = "org.jetbrains.kotlinx:kotlinx-serialization-core", version.ref = "kotlin-serialization"}

gradle/plugins/src/main/kotlin/com/saveourtool/template/build/KotlinUtils.kt

@@ -0,0 +1,19 @@
+package com.saveourtool.template.build
+
+import org.gradle.api.Project
+import org.gradle.kotlin.dsl.withType
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+/**
+ * Enables null-safe checking (jsr305) and allows OptIn
+ */
+fun Project.configureKotlinCompile() {
+    tasks.withType<KotlinCompile> {
+        kotlinOptions {
+            freeCompilerArgs += "-Xjsr305=strict"
+        }
+        compilerOptions {
+            freeCompilerArgs.add("-opt-in=kotlin.RequiresOptIn")
+        }
+    }
+}

…uild/kotlin-mpp-configuration.gradle.kts …in-mpp-with-jvm-configuration.gradle.ktsgradle/plugins/src/main/kotlin/com/saveourtool/template/build/kotlin-mpp-configuration.gradle.kts renamed to gradle/plugins/src/main/kotlin/com/saveourtool/template/build/kotlin-mpp-with-jvm-configuration.gradle.kts gradle/plugins/src/main/kotlin/com/saveourtool/template/build/kotlin-mpp-configuration.gradle.kts renamed to gradle/plugins/src/main/kotlin/com/saveourtool/template/build/kotlin-mpp-with-jvm-configuration.gradle.kts

@@ -3,24 +3,16 @@ package com.saveourtool.template.build
 import org.gradle.accessors.dm.LibrariesForLibs
 import org.gradle.api.tasks.testing.Test
 import org.gradle.kotlin.dsl.*
-import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
     kotlin("multiplatform")
 }
 
 @Suppress("GENERIC_VARIABLE_WRONG_DECLARATION")
 val libs = the<LibrariesForLibs>()
-val javaVersion: JavaVersion = JavaVersion.toVersion(libs.versions.java.get())
-
-java {
-    sourceCompatibility = javaVersion
-}
 
 kotlin {
-    jvmToolchain {
-        this.languageVersion.set(JavaLanguageVersion.of(javaVersion.majorVersion))
-    }
+    jvm()
 
     sourceSets {
         jvmMain {
@@ -31,15 +23,7 @@ kotlin {
     }
 }
 
-tasks.withType<KotlinCompile> {
-    kotlinOptions {
-        freeCompilerArgs += "-Xjsr305=strict"
-        jvmTarget = javaVersion.majorVersion
-    }
-    compilerOptions {
-        freeCompilerArgs.add("-opt-in=kotlin.RequiresOptIn")
-    }
-}
+configureKotlinCompile()
 
 tasks.withType<Test> {
     useJUnitPlatform()

gradle/plugins/src/main/kotlin/com/saveourtool/template/build/spring-boot-kotlin-configuration.gradle.kts

@@ -3,6 +3,7 @@ package com.saveourtool.template.build
 import org.gradle.accessors.dm.LibrariesForLibs
 import org.gradle.api.tasks.testing.Test
 import org.gradle.kotlin.dsl.*
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
@@ -13,30 +14,10 @@ plugins {
     id("org.springframework.boot")
 }
 
+configureKotlinCompile()
+
 @Suppress("GENERIC_VARIABLE_WRONG_DECLARATION")
 val libs = the<LibrariesForLibs>()
-val javaVersion: JavaVersion = JavaVersion.toVersion(libs.versions.java.get())
-
-java {
-    sourceCompatibility = javaVersion
-}
-
-kotlin {
-    jvmToolchain {
-        this.languageVersion.set(JavaLanguageVersion.of(javaVersion.majorVersion))
-    }
-}
-
-tasks.withType<KotlinCompile> {
-    kotlinOptions {
-        freeCompilerArgs += "-Xjsr305=strict"
-        jvmTarget = javaVersion.majorVersion
-    }
-    compilerOptions {
-        freeCompilerArgs.add("-opt-in=kotlin.RequiresOptIn")
-    }
-}
-
 dependencies {
     implementation(project.dependencies.enforcedPlatform(libs.spring.boot.dependencies))
 }