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
        }
      }
    }
  }
}

出力結果

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.example.bom</groupId>
  <artifactId>bill-of-material</artifactId>
  <version>1.0.0</version>
  <packaging>pom</packaging>
  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>io.netty</groupId>
        <artifactId>netty-all</artifactId>
        <version>4.1.36.Final</version>
      </dependency>
      <dependency>
        <groupId>com.google.guava</groupId>
        <artifactId>guava</artifactId>
        <version>28.0-jre</version>
      </dependency>
      <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.9.9</version>
      </dependency>
    </dependencies>
  </dependencyManagement>
</project>

実行方法

./gradlew publishMavenJavaPublicationToTestingRepository