artifact.addMetadata(metadata);

        Metadata repoMetadata = metadata.getMetadata();
        String version = null;
        if (repoMetadata != null && repoMetadata.getVersioning() != null) {
            version = constructVersion(repoMetadata.getVersioning(), artifact.getBaseVersion());
        }

        if (version == null) {
            // use the local copy, or if it doesn't exist - go to the remote repo for it

            Metadata repoMetadata, List<String> availableVersions) {
        Collection<String> versions = new LinkedHashSet<>();

        if ((repoMetadata != null) && (repoMetadata.getVersioning() != null)) {
            versions.addAll(repoMetadata.getVersioning().getVersions());
        }

        versions.addAll(availableVersions);

        List<ArtifactVersion> artifactVersions = new ArrayList<>(versions.size());

                        try (InputStream in = Files.newInputStream(metadata.getPath())) {
                            versioning = new Versioning(
                                    new MetadataStaxReader().read(in, false).getVersioning());
                        }
                    }
                }
            }
        } catch (Exception e) {
            invalidMetadata(session, trace, metadata, repository, e);

            listener.metadataInvalid(event.build());
        }
    }

    private void mergeMetadata(Versions versions, Metadata source, ArtifactRepository repository) {
        Versioning versioning = source.getVersioning();
        if (versioning != null) {
            String timestamp = versioning.getLastUpdated() == null
                    ? ""
                    : versioning.getLastUpdated().trim();

                        try (InputStream in = Files.newInputStream(metadata.getPath())) {
                            versioning = new Versioning(
                                    new MetadataStaxReader().read(in, false).getVersioning());

                            /*
                            NOTE: Users occasionally misuse the id "local" for remote repos which screws up the metadata