Adding a jar dependency from project instead of project itself

Help/Discuss
1

I am using a multi-project build. I want to be able to take the JPA entities from one project and expose them as a compile dependency library in another project.

Here is an example what I have right now.

projectA/build.gradle

apply plugin: 'java'
apply plugin: 'eclipse-wtp'

dependencies {
    compile project(path: ':projectB', configuration: 'domains')
}

project(':projectB') {
    configurations {
        domains
    }

    dependencies {
        compile project(':projectC')
    }

    task domainsJar(type: Jar) {
        baseName = 'projectB-domains'
        from sourceSets.main.output
        from project(':projectC').sourceSets.main.output
        include('projectB/domains/**')
        include('projectC/domains/**')
    }

    artifacts {
        domains domainsJar
    }
}

I modeled this after https://docs.gradle.org/4.1/userguide/multi_project_builds.html - Example 26.26

It works as expected for building the project with gradlew clean build. The custom library (domainsJar) is contained within the resulting lib dependencies. This approach, however, adds :projectB as a project dependency to :projectA when it builds the classpath with the eclipse-wtp plugin. This makes all of the classes within :projectB accessible to :projectA within Eclipse.

Is there a way to tell the eclipse-wtp plugin to build and wire up the custom jar instead of adding the whole project as a dependency?

I think the solution is to build the domainsJar and add it as a compile file as opposed to a compile project. I don’t quite know how to do that though. Can anyone provide an example of this or think of a better way to solve my problem? Sorry if this is a duplicate question, I googled a bunch, but came up empty.

I am using Gradle 2.12.

Thank you.

UPDATE:

I came up with an approach that seems to work. (at least partially)

projectA/build.gradle

task domainsJar(type: Jar, dependsOn: clean) {
    baseName = 'projectB-domains'
    from project(':projectC').sourceSets.main.output
    from project(':projectC').sourceSets.main.output
    include('projectB/domains/**')
    include('projectC/domains/**')
}

task copyDomainsJar(type: Copy) {
    from domainsJar
    into 'lib/domains'
}

eclipseClasspath.dependsOn copyDomainsJar

dependencies {
    compile fileTree(dir: 'lib/domains')
}