fix(kotlin-spring): update Gradle templates to Kotlin 2.2 JvmTarget DSL and bump CI Gradle

- Replace deprecated kotlinOptions.jvmTarget with kotlin.compilerOptions DSL
- Upgrade Gradle wrapper to 8.14 for Kotlin 2.2 compatibility
- Add kotlin-springboot-4 sample to JDK17 CI matrix
- Regenerate sample with updated templates

Author: yonatankarp

.github/workflows/samples-kotlin-server-jdk17.yaml

@@ -27,7 +27,7 @@ on:
       # - samples/server/petstore/kotlin-spring-default/**
 
 env:
-  GRADLE_VERSION: '8.10'
+  GRADLE_VERSION: '8.14'
 
 jobs:
   build:
@@ -48,6 +48,7 @@ jobs:
           - samples/server/petstore/kotlin-springboot-additionalproperties
           - samples/server/petstore/kotlin-springboot-delegate-nodefaults
           - samples/server/petstore/kotlin-springboot-request-cookie
+          - samples/server/petstore/kotlin-springboot-4
           - samples/server/petstore/kotlin-server/jaxrs-spec
           - samples/server/petstore/kotlin-server/jaxrs-spec-mutiny
           - samples/server/petstore/kotlin-server/javalin

.github/workflows/samples-kotlin-server-jdk21.yaml

@@ -13,7 +13,7 @@ on:
       - 'samples/server/petstore/kotlin-server-required-and-nullable-properties/**'
 
 env:
-  GRADLE_VERSION: '8.10'
+  GRADLE_VERSION: '8.14'
 
 jobs:
   build:

modules/openapi-generator/src/main/resources/kotlin-spring/libraries/spring-boot/buildGradle-sb4-Kts.mustache

@@ -1,4 +1,4 @@
-import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 
 group = "{{groupId}}"
 version = "{{artifactVersion}}"
@@ -8,8 +8,10 @@ repositories {
     mavenCentral()
 }
 
-tasks.withType<KotlinCompile> {
-    kotlinOptions.jvmTarget = "17"
+kotlin {
+    compilerOptions {
+        jvmTarget.set(JvmTarget.JVM_17)
+    }
 }
 
 {{#interfaceOnly}}

modules/openapi-generator/src/main/resources/kotlin-spring/libraries/spring-cloud/buildGradle-sb4-Kts.mustache

@@ -1,4 +1,4 @@
-import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 
 group = "{{groupId}}"
 version = "{{artifactVersion}}"
@@ -8,8 +8,10 @@ repositories {
     mavenCentral()
 }
 
-tasks.withType<KotlinCompile> {
-    kotlinOptions.jvmTarget = "17"
+kotlin {
+    compilerOptions {
+        jvmTarget.set(JvmTarget.JVM_17)
+    }
 }
 
 plugins {

modules/openapi-generator/src/main/resources/kotlin-spring/libraries/spring-declarative-http-interface/buildGradle-sb4-Kts.mustache

@@ -1,4 +1,4 @@
-import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 
 group = "{{groupId}}"
 version = "{{artifactVersion}}"
@@ -8,8 +8,10 @@ repositories {
     mavenCentral()
 }
 
-tasks.withType<KotlinCompile> {
-    kotlinOptions.jvmTarget = "17"
+kotlin {
+    compilerOptions {
+        jvmTarget.set(JvmTarget.JVM_17)
+    }
 }
 
 plugins {

samples/server/petstore/kotlin-springboot-4/.openapi-generator/FILES

@@ -1,4 +1,3 @@
-.openapi-generator-ignore
 README.md
 build.gradle.kts
 gradle/wrapper/gradle-wrapper.jar
@@ -26,6 +25,3 @@ src/main/kotlin/org/openapitools/model/Pet.kt
 src/main/kotlin/org/openapitools/model/Tag.kt
 src/main/kotlin/org/openapitools/model/User.kt
 src/main/resources/application.yaml
-src/test/kotlin/org/openapitools/api/PetApiTest.kt
-src/test/kotlin/org/openapitools/api/StoreApiTest.kt
-src/test/kotlin/org/openapitools/api/UserApiTest.kt

samples/server/petstore/kotlin-springboot-4/build.gradle.kts

@@ -1,4 +1,4 @@
-import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 
 group = "org.openapitools"
 version = "1.0.0"
@@ -8,8 +8,10 @@ repositories {
     mavenCentral()
 }
 
-tasks.withType<KotlinCompile> {
-    kotlinOptions.jvmTarget = "17"
+kotlin {
+    compilerOptions {
+        jvmTarget.set(JvmTarget.JVM_17)
+    }
 }
 
 plugins {

samples/server/petstore/kotlin-springboot-4/gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.1.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME