Reading a POM from Gradle

17 February 2015

Reading a Maven POM is Easy with Gradle and Groovy!

The inspiration for this post came from the post here: Reading info from existing pom.xml file using Gradle?

Naively I implemented the first solution which is given below.

defaultTasks 'hello'

repositories {
  mavenCentral()
}
configurations {
  mavenAntTasks
}
dependencies {
  mavenAntTasks 'org.apache.maven:maven-ant-tasks:2.1.3'
}

task hello << {
  ant.taskdef(
    resource: 'org/apache/maven/artifact/ant/antlib.xml',
    uri: 'antlib:org.apache.maven.artifact.ant',
    classpath: configurations.mavenAntTasks.asPath)

  ant.'antlib:org.apache.maven.artifact.ant:pom'(id:'mypom', file:'pom.xml')
  println ant.references['mypom'].version
}

Now, this solution did meet the original posters requirement. However, after running the hello task I was surprised to see a few libs being downloaded which didn’t feel slick.

In true groovy fashion this could be achieved much more simply using the code below:

def pom = new XmlSlurper().parse(new File('pom.xml'))

println 'my pom version ' + pom.version