Gradle task for generating Maven's POM file for Android AAR

build.gradle

task createPom {
    apply plugin: 'maven'
    description "Generates pom.xml"
    pom {
        project {
            groupId 'com.example'
            artifactId 'example'
            version '0.0.1-SNAPSHOT'
            packaging 'aar'
        }
    }.withXml {
        def dependenciesNode = asNode().appendNode('dependencies')

        configurations.compile.allDependencies.each { dependency ->
            def dependencyNode = dependenciesNode.appendNode('dependency')
            dependencyNode.appendNode('groupId', dependency.group)
            dependencyNode.appendNode('artifactId', dependency.name)
            dependencyNode.appendNode('version', dependency.version)
        }
    }.writeTo("$buildDir/pom.xml")
}

Trying to run this results in the following exception:

FAILURE: Build failed with an exception.

* Where:
Build file '/Users/user/Work/project/module/build.gradle' line: 179

* What went wrong:
A problem occurred evaluating project ':instantsearch'.
> No such property: pom for class: java.lang.String

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED