maven-publish plugin で bom 出力

build.gradle

plugins {
  id 'maven-publish'
}

repositories {
  mavenCentral()
}

configurations {
  pom
}

dependencies {
  pom 'io.netty:netty-all:4.1.36.Final'
  pom 'com.google.guava:guava:28.0-jre'
  pom 'com.fasterxml.jackson.core:jackson-databind:2.9.9'
}

publishing {
  repositories {
    mavenLocal()
    maven {
      name = 'testing'
      url = "$buildDir/repo"
    }
  }
  publications {
    mavenJava(MavenPublication) {
      pom.withXml {
        def root = asNode()
        def depMan = root.appendNode('dependencyManagement')
        def ds = depMan.appendNode('dependencies')
        def deps = configurations.pom.allDependencies
        deps.each { dep ->
          def d = ds.appendNode('dependency')
          d.appendNode('groupId').value = dep.group
          d.appendNode('artifactId').value = dep.name
          d.appendNode('version').value = dep.version
        }
      }
    }
  }
}

実行方法

./gradlew publishMavenJavaPublicationToTestingRepository