// The implementation jar module.
        def module = mavenRepo.module(group, artifact, version)
        def pluginModule = module.publish()
        def artifactFile = module.getArtifactFile()

        def markerModules = new ArrayList<Module>()

        pluginIds.keySet().each { id ->
            // The marker files for each plugin.

                                if (!changingModule) {
                                    File artifactFile = metadataFileSource.getArtifactFile();
                                    if (artifactFile != null && artifactFile.exists()) {
                                        // it's possible that the file is null if it has been removed from the cache for example