s3 gradle repository with instance credentials

build.gradle

// from 
// http://stackoverflow.com/questions/35852475/how-to-use-the-default-aws-credentials-chain-for-an-s3-backed-maven-repository-i
apply plugin: 'java'
apply plugin: 'maven-publish'

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.amazonaws:aws-java-sdk:1.10.58'
    }
}

publishing {
    publications {
        mavenJava(MavenPublication) {
            groupId 'com.acme'
            artifactId 'sample-gradle-dependency'
            version '1.0'
            from components.java
        }
    }
    repositories {      
        maven {
            url "s3://my-bucket/releases"
            credentials(AwsCredentials) {
                def defaultCredentials = new com.amazonaws.auth.DefaultAWSCredentialsProviderChain().getCredentials()
                accessKey defaultCredentials.getAWSAccessKeyId()
                secretKey defaultCredentials.getAWSSecretKey()
            }
        }       
    }   
}