def variantDef = publications.variants.create("child")
        variantDef.attributes.attribute(Attribute.of("thing", String), "value")
        variantDef.artifacts.add(artifact)

        expect:
        def variants = getOutgoingVariants(publications)
        variants.size() == 1

        def child = variants.first()
        child.displayName.displayName == '<config> variant child'

Secondary variants are variants created via the Configuration#getOutgoing(): ConfigurationPublications API which also participate in selection, in addition to the configuration itself.

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Rob Pike <******@****.***> 1330044499 +1100

Secondary variants are variants created via the Configuration#getOutgoing(): ConfigurationPublications API which also participate in selection, in addition to the configuration itself.

BUILD SUCCESSFUL in 0s...

/**
 * A component which can declare additional variants corresponding to
 * features. When published to Maven POMs, the dependencies of those variants
 * are exposed as optional dependencies. When published to Gradle metadata, the
 * variants are published as is.
 *
 * @since 5.3
 */
public interface AdhocComponentWithVariants extends SoftwareComponent {

    /**

        if (attributes.isEmpty()) {
            failWith("Variant '" + name + "' must declare at least one attribute.");
        }
        if (variants.containsKey(name)) {
            failWith("It is invalid to have multiple variants with the same name ('" + name + "')");
        } else {
            VariantIdentity identity = new VariantIdentity(attributes, capabilities);
            if (variants.containsValue(identity)) {

        publishedModule.parsedPom.scopes.isEmpty()
        publishedModule.parsedModuleMetadata.variants*.name == ["usage"]
        with(publishedModule.parsedModuleMetadata.variant("usage")) { variant ->
            variant.files.empty
            variant.dependencies.empty
            variant.availableAt.coords == 'org.gradle.test:nested:1.9-SNAPSHOT'
            variant.availableAt.url == "../../nested/1.9-SNAPSHOT/nested-1.9-SNAPSHOT.module"
        }

 * <p>You can use this interface to associate artifacts with a configuration using the {@link #artifact(Object)} methods. You can also define several variants of the configuration's artifacts. Each variant represents a set of artifacts that form some mutually exclusive usage of the component.</p>
 *
 * <p>An implicit variant is defined for a configuration whenever any artifacts are attached directly to this object or inherited from another configuration.</p>
 *

cpp-library-variant-task-graph.png...

swift-library-variant-task-graph.png...