Spring Gradle task for queryDsl fails after OpenApiGenerate - spring

Question

Spring project using Gradle. I'm using OpenApiGenerate in combination with QueryDsl (to use with Spring MongoDB).
gradle clean build fails sometimes locally and always on Gitlab-CI:
Successfully generated code to task ':backend:openApiGenerate' property 'outputDir'
34 errors
> Task :backend:querydsl FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':backend:querydsl'.
QueryDsl fails because it can't find sources generated by OpenApiGenerate:
public class SomethingController implements SomethingApi {
^
Here's the gradle build file:
// QueryDSL
configurations {
querydslapt.extendsFrom compileClasspath
}
dependencies {
querydslapt 'com.querydsl:querydsl-apt:4.3.1'
}
task querydsl(type: JavaCompile, group: 'build', description: 'Generate the QueryDSL query types') {
source = sourceSets.main.java
classpath = configurations.compile + configurations.querydslapt
options.annotationProcessorPath = configurations.compile + configurations.querydslapt
options.compilerArgs = [
'-proc:only', //only annotations
'-processor', 'org.springframework.data.mongodb.repository.support.MongoAnnotationProcessor'
]
destinationDir = file("${buildDir}/generated/src/main/java")
}
compileJava.dependsOn querydsl
// OpenAPI
openApiValidate {
inputSpec = "${rootDir}/openapi/specifications/schema.yaml".toString()
}
openApiGenerate {
generatorName = "spring"
library = "spring-boot"
inputSpec = "${rootDir}/openapi/specifications/schema.yaml".toString()
outputDir = "${buildDir}/generated".toString()
systemProperties = [
modelDocs : "false",
models : "",
apis : "",
supportingFiles: "false"
]
configOptions = [
useOptional : "true",
swaggerDocketConfig : "false",
performBeanValidation: "false",
useBeanValidation : "false",
useTags : "true",
singleContentTypes : "true",
basePackage : "...api",
configPackage : "...api",
title : rootProject.name,
java8 : "false",
dateLibrary : "java8",
serializableModel : "true",
artifactId : rootProject.name,
apiPackage : "...api",
modelPackage : "...model",
invokerPackage : "...api",
interfaceOnly : "true"
]
}
compileJava.dependsOn 'openApiGenerate'
Further changes that did not help:
Removed
compileJava.dependsOn 'openApiGenerate'
compileJava.dependsOn querydsl
and added
compileJava.dependsOn querydsl
querydsl.mustRunAfter 'openApiGenerate'
Does anyone have an idea? specifically on why does this sometimes work locally and sometimes not?

Answer 1

Is the output dir of openApiGenerate task is added somehow to src dir? If not, you should have
sourceSets{
main{
java{
dir openApiGenerate.outputDir
}}
}

Answer 2

What helped was changing destinationDir of querydsl to something else:
destinationDir = file("${buildDir}/generated/src/main/java")
to
destinationDir = file("${buildDir}/generated/src/main/java/querydsl")
=> There seems to have been a locking state enforced by openApiGenerate on the initial destinationDir since it was shared by both tasks.