} catch (PluginVersionResolutionException e) {
                throw new PluginManagerException(plugin, e.getMessage(), e);
            }
        }

        // TODO: store plugin version

        // resolve plugin artifacts
        List<Artifact> artifacts;
        PluginArtifactsCache.Key cacheKey = pluginArtifactsCache.createKey(plugin, null, repositories, session);

            mergeMetadata(metadata, remoteRepositories, localRepo);
        } catch (RepositoryMetadataStoreException e) {
            throw new RepositoryMetadataResolutionException(
                    "Unable to store local copy of metadata: " + e.getMessage(), e);
        }
    }

    private Date getLocalCopyLastModified(ArtifactRepository localRepository, RepositoryMetadata metadata) {