gradle publish ne récupère pas d'artefacts: "La tâche n'a déclaré aucune sortie malgré l'exécution d'actions."

Je migre un projet java de gradle 2.x vers 5.3.1.

Le dernier problème est qu'aucun artefact (un tar dans notre cas) n'est publié dans un artefact.

La configuration de build.gradle est

> Task :$MODULE:artifactoryPublish
Task ':$MODULE:artifactoryPublish' is not up-to-date because:
  Task has not declared any outputs despite executing actions.
:$MODULE:artifactoryPublish (Thread[Execution worker for ':',5,main]) completed. Took 0.002 secs.
:artifactoryDeploy (Thread[Execution worker for ':',5,main]) started.

> Task :artifactoryDeploy
Task ':artifactoryDeploy' is not up-to-date because:
  Task has not declared any outputs despite executing actions.
Deploying build descriptor to: $OUR_ARTIFACTORY/artifactory/api/build
Build successfully deployed. Browse it in Artifactory under $OUR_ARTIFACTORY/artifactory/webapp/builds/$MODULE/1554465369336
:artifactoryDeploy (Thread[Execution worker for ':',5,main]) completed. Took 0.155 secs.

Et dans le module

task('dist', type: Tar) {
    dependsOn('jar')
    archiveName "$MODULE-${version}.${extension}"
...
}
publishing {
    publications {
        mavenJava(MavenPublication)
                {
                    artifact dist {
                    }
                }
    }
}
configurations.archives.artifacts.clear()
artifacts {
    archives dist
}

Maintenant quand je fais ./gradlew --info: $ MODULE: artifactoryPublish il se plaint de sorties manquantes et ne publie pas le tar dans un artificiel.

Comment résoudre ce problème?

subprojects {
    apply plugin: "com.jfrog.artifactory"
    project.ext {
        artifactoryConfig = new File(project.gradle.gradleUserHomeDir, "artifactory.gradle")
    }
    if (artifactoryConfig.exists()) {
        apply plugin: 'maven'
        apply from: artifactoryConfig
    }
    sourceCompatibility = 1.8
    repositories {
        mavenCentral()
        maven { url $OUR_ARTIFACTORY }
    }
    publishing {
        publications {
            mavenJava(MavenPublication) {
                from components.java
            }
        }
    }
}
artifactory {
    publish {
        contextUrl = "${artifactoryBaseUrl}"
        repository {
            repoKey = "libs-release-local"
            username = "${artifactoryUsername}"
            password = "${artifactoryPassword}"
        }
    }
    resolve {
        repoKey = 'repos'
    }
}