[SOLVED] How to set dependency for gradle task `kaptGenerateStubsKotlin` to `openApiGenerate` kotlin kapt

Rewriting an API program from java to kotlin.

I am generating some models from openAPI spec file during build process using openapi generator. Those models are also used inside the rest api program and by querydsl and jpa repository.

`build.gradle` File:

import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
buildscript {
    ext{
        kotlinVersion = '1.9.23'
    }
}

plugins {
    id 'java'
    id 'org.springframework.boot' version '3.2.3'
    id "org.openapi.generator" version "7.2.0"
    id 'org.jetbrains.kotlin.jvm' version "$kotlinVersion"
    id 'org.jetbrains.kotlin.plugin.spring' version "$kotlinVersion"
    id "org.jetbrains.kotlin.kapt" version "$kotlinVersion"
    id 'jacoco'
    id "com.gorylenko.gradle-git-properties" version "2.4.1"
    id 'com.adarshr.test-logger' version '4.0.0'
    id 'org.cyclonedx.bom' version '1.8.2'
}

apply plugin: 'io.spring.dependency-management'

group = 'com.test'
version = '0.11.1'
description = 'Restapi'

java {
    sourceCompatibility = JavaVersion.VERSION_21
    targetCompatibility = JavaVersion.VERSION_21
}

repositories {
    mavenCentral()
    gradlePluginPortal()
}

configurations {
    compileOnly {
        extendsFrom annotationProcessor
  }
}

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter-web'
    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
    implementation 'org.springframework.boot:spring-boot-starter-security'
    implementation 'org.springframework.security:spring-security-oauth2-resource-server'
    implementation 'org.springframework.security:spring-security-oauth2-jose'
    implementation 'org.springframework.boot:spring-boot-starter-actuator'
    implementation 'org.springframework.boot:spring-boot-starter-validation'
    implementation 'org.springframework.kafka:spring-kafka'
    implementation 'org.jetbrains.kotlin:kotlin-reflect'
    implementation 'org.springdoc:springdoc-openapi-starter-webmvc-ui:2.2.0'
    implementation 'org.openapitools:jackson-databind-nullable:0.2.6'
    implementation 'com.querydsl:querydsl-jpa::jakarta'
    implementation 'com.querydsl:querydsl-apt'
    implementation 'org.liquibase:liquibase-core'
    implementation "com.google.guava:guava:32.1.2-jre"
    implementation 'org.apache.tika:tika-core:2.9.0'
    compileOnly 'org.projectlombok:lombok'
    annotationProcessor 'org.projectlombok:lombok'
    annotationProcessor "com.querydsl:querydsl-apt::jakarta"
    kapt "com.querydsl:querydsl-apt::jakarta"
    annotationProcessor "jakarta.persistence:jakarta.persistence-api"
    runtimeOnly 'org.postgresql:postgresql'
    testImplementation 'org.springframework.boot:spring-boot-starter-test'
    testImplementation 'org.springframework.boot:spring-boot-starter-webflux'
    testImplementation 'org.springframework.security:spring-security-test'
    testImplementation 'org.springframework.kafka:spring-kafka-test'
    testImplementation 'org.springframework.boot:spring-boot-testcontainers'
    testImplementation 'org.testcontainers:junit-jupiter'
    testImplementation 'org.testcontainers:postgresql'
    testImplementation 'org.testcontainers:kafka'
}

tasks.withType(KotlinCompile) {
  kotlinOptions {
    freeCompilerArgs += '-Xjsr305=strict'
    jvmTarget = '21'
  }
}

openApiGenerate {
    generatorName = "kotlin-spring"
    library = "spring-boot"
    groupId = "${project.group}"
    inputSpec = "$rootDir/api/restella-openapi.yaml"
    apiPackage = "${project.group}.${project.name}.generated.api"
    modelPackage = "${project.group}.${project.name}.generated.model"
    ignoreFileOverride = "$rootDir/.openapi-generator-ignore"
    configOptions = [
        interfaceOnly: "true",
        useTags: "true",
        documentationProvider: "springdoc",
        useSpringBoot3: "true",
        enumPropertyNaming: "UPPERCASE",
        generatedConstructorWithRequiredArgs : "false",
        additionalModelTypeAnnotations: "@lombok.AllArgsConstructor;@lombok.NoArgsConstructor"
    ]
}

openApiGenerators {
    include = [
        'stable'
        ]
}

sourceSets {
    main {
        kotlin {
            srcDirs += "$buildDir/generate-resources/main/src/main/kotlin"
        }
    }
}

compileJava.dependsOn tasks.openApiGenerate, tasks.compileKotlin
compileKotlin.dependsOn tasks.openApiGenerate

kapt {
    javacOptions {
        option("querydsl.entityAccessors", true)
    }
    arguments {
        arg("plugin", "com.querydsl.apt.jpa.JPAAnnotationProcessor")
    }
}

tasks.named('test') {
  useJUnitPlatform()
}

I get the following error when running gradle build

> Task :openApiGenerate FAILED

FAILURE: Build failed with an exception.

* What went wrong:
A problem was found with the configuration of task ':openApiGenerate' (type 'GenerateTask').
  - Gradle detected a problem with the following location: '/workspaces/Restella/build/generate-resources/main'.
    
    Reason: Task ':kaptGenerateStubsKotlin' uses this output of task ':openApiGenerate' without declaring an explicit or implicit dependency. This can lead to incorrect results being produced, depending on what order the tasks are executed.
    
    Possible solutions:
      1. Declare task ':openApiGenerate' as an input of ':kaptGenerateStubsKotlin'.
      2. Declare an explicit dependency on ':openApiGenerate' from ':kaptGenerateStubsKotlin' using Task#dependsOn.
      3. Declare an explicit dependency on ':openApiGenerate' from ':kaptGenerateStubsKotlin' using Task#mustRunAfter.
    
    For more information, please refer to https://docs.gradle.org/8.5/userguide/validation_problems.html#implicit_dependency in the Gradle documentation.

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at https://help.gradle.org.

BUILD FAILED in 1s
5 actionable tasks: 5 executed

Adding task dependency also get error

I tried to add dependency for kaptGenerateStubsKotlin:

tasks.named('kaptGenerateStubsKotlin').configure {
    dependsOn 'openApiGenerate'
}

But I get error:

FAILURE: Build completed with 2 failures.

1: Task failed with an exception.
-----------
* Where:
Build file '/workspaces/restapi/build.gradle' line: 134

* What went wrong:
A problem occurred evaluating root project 'restella'.
> Task with name 'kaptGenerateStubsKotlin' not found in root project 'restella'.

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at https://help.gradle.org.
==============================================================================

2: Task failed with an exception.
-----------
* Where:
Build file '/workspaces/restapi/build.gradle' line: 134

* What went wrong:
A problem occurred evaluating root project 'restella'.
> Task with name 'kaptGenerateStubsKotlin' not found in root project 'restella'.

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at https://help.gradle.org.
==============================================================================

BUILD FAILED in 567ms

What is wrong here? How can I update the build.gradle to use openapi generate, querydsl as I was with java?

How to set dependency for gradle task `kaptGenerateStubsKotlin` to `openApiGenerate` kotlin kapt

build.gradle File:

Adding task dependency also get error

`build.gradle` File: