custom gradle plugin.

PublishPlugin.groovy

class PublishPlugin implements Plugin<Project>{

    def mavenName = 'my maven'

    @Override
    void apply(Project target) {
        PublishExtension extension = project.extensions.create('publish', PublishExtension)
        project.apply([plugin: 'maven'])

    }

    void attachArtifacts(Project project) {
        project.uploadArchives{

            repositories.mavenDeployer {
                name = mavenName
                //release版本
                repository(url: "http://192.168.1.200:8081/nexus/content/repositories/releases/") {
                    authentication(userName: 'admin', password: '123')
                }
                //snapshot版本
                snapshotRepository(url: "http://192.168.1.200:8081/nexus/content/repositories/snapshots/") {
                    authentication(userName: 'admin', password: '123')
                }
                pom.version = project.publish.version
                pom.artifactId = project.publish.artifactId
                pom.groupId = project.publish.packaging
                pom.packaging = 'aar'
            }
        }
        //Artifact artifacts = project.plugins.hasPlugin('com.android.library') ? new AndroidArtifacts() : new JavaArtifacts()

    }
}

class PublishExtension {

    String pomString = 'package:artifact:1.0.0';

    String getPackaging(){
        pomString.split(':').first()
    }

    String getArtifactId(){
        pomString.split(':')[1]
    }

    String getVersion(){
        pomString.split(':').last()
    }
}