How do I publish a second library from another sourceset in gradle?

Question

I have this tlib sourceset

sourceSets {
    val main by getting
    val tlib by creating {
        compileClasspath += main.output
        runtimeClasspath += main.output
    }
    val test by getting {
        compileClasspath += tlib.output
        runtimeClasspath += tlib.output
    }
}

configurations {
    val tlibCompile by getting {
        extendsFrom(configurations["implementation"])
    }
}

I am imagining something like this, but this is not complete

publishing {
    publications {
        val tlibSourcesJar by tasks.registering(Jar::class) {
            classifier = "sources"
            from(sourceSets["tlib"].allSource)
        }

        register("mavenTLib", MavenPublication::class) {
            from(components["tlib"])
            artifact(tlibSourcesJar.get())
        }
    }
}

but I get

Could not create domain object 'mavenTLib' (MavenPublication)
> SoftwareComponentInternal with name 'tlib' not found.

How can I publish my test lib separately from my main lib?

Answer 1

this works to an extent but is probably not the best way to do it

sourceSets {
    val main by getting
    val tlib by creating {
        compileClasspath += main.output
        runtimeClasspath += main.output
    }
    val test by getting {
        compileClasspath += tlib.output
        runtimeClasspath += tlib.output
    }
}

configurations {
    val tlibCompile by getting {
        extendsFrom(configurations["implementation"])
    }
}

publishing {
    publications {
        val tlibJar by tasks.registering(Jar::class) {
            from(sourceSets["tlib"].output)
        }

        val tlibSourcesJar by tasks.registering(Jar::class) {
            archiveClassifier.set("sources")
            from(sourceSets["tlib"].allSource)
        }

        register("mavenTLib", MavenPublication::class) {
            artifactId = "phg-entity-tlib"
            artifact(tlibJar.get())
            artifact(tlibSourcesJar.get())
        }
    }
}