build.gradle

import org.gradle.api.internal.artifacts.dependencies.*
import org.gradle.logging.StyledTextOutput
import org.gradle.logging.StyledTextOutput.Style
import org.gradle.logging.StyledTextOutputFactory


version=System.nanoTime()

subprojects {
  apply plugin: "java"
  apply plugin: "maven"
  
  group = "mycompany"
  
  repositories {
    mavenLocal()
  }


	configurations.all { configuration ->
	resolutionStrategy {
		eachDependency { details ->
			def p1 = rootProject.subprojects.find { it.group == details.requested.group && it.name == details.requested.name }
			if( p1 != null && p1.version != details.requested.version){
				def staticRef = false;
				configuration.hierarchy.each { hconf ->
					def z=hconf.dependencies.find { it instanceof ProjectDependency && it.group == details.requested.group && it.name == details.requested.name }
					staticRef = staticRef || z
				}
				if( staticRef != false ){
					logger.lifecycle "hiding binary of '${details.requested}' in [${project}] "
					useTarget 'junit:junit:4.10'	// this should be some empty project which can be referenced in cases like this
				}else{
					StyledTextOutput o = services.get(StyledTextOutputFactory).create(this.class)
					o.style(Style.Failure).text('============================================= ').println()
					o.style(Style.Info).text("${project}: ")
					o.style(Style.Failure).text('binary/source clash detected')
					o.println()
					o.style(Style.Header).text('please use:')
					o.println()
					o.style(Style.UserInput).text("   dependencies.${configuration.name} elastic(??? '${details.requested.name}','${details.requested.name}')")
					o.println()
					o.style(Style.Failure).text('=============================================').println()
					useVersion 'nonexistent'
				}
			}
		}
	}
	}

}

def elastic(notation, projectName) {
  if (allprojects.find { it.name == projectName }) {
    println "adding project dependency on project $projectName"
    project(projectName)
  } else {
    println "adding binary dependency on project $projectName"
    dependencies.create(notation)
  }
}