throw new TransferFailedException("Connection failed: " + e.getMessage(), e);
        } catch (AuthenticationException e) {
            throw new TransferFailedException("Authentication failed: " + e.getMessage(), e);
        } catch (AuthorizationException e) {
            throw new TransferFailedException("Authorization failed: " + e.getMessage(), e);
        } finally {

            } catch (RepositoryMetadataReadException e) {
                if (getLogger().isDebugEnabled()) {
                    getLogger().warn(e.getMessage(), e);
                } else {
                    getLogger().warn(e.getMessage());
                }
                return setRepository;
            }

            if (repoMetadata.isSnapshot() && (previousMetadata != null)) {

            pluginManager.setupPluginRealm(pluginDescriptor, session, null, null, null);
        } catch (Exception e) {
            throw new PluginManagerException(plugin, e.getMessage(), e);
        }

        ClassLoader oldClassLoader = Thread.currentThread().getContextClassLoader();
        try {
            Thread.currentThread().setContextClassLoader(pluginDescriptor.getClassRealm());

                }
            }

            message = "The build could not read " + children.size() + " project" + (children.size() == 1 ? "" : "s");
        } else {
            message = getMessage(message, exception);
        }

        return new ExceptionSummary(exception, message, reference, children);
    }

    private ExceptionSummary handle(ProjectBuildingResult result) {

                                + artifact.getArtifactId() + ":" + artifact.getVersion() + ".";

                        if (relocation.getMessage() != null) {
                            message += "  " + relocation.getMessage();
                        }

                        if (artifact.getDependencyTrail() != null
                                && artifact.getDependencyTrail().size() == 1) {

        });
        // aggregate all exceptions
        if (!prerequisiteExceptions.isEmpty()) {
            String messages = prerequisiteExceptions.stream()
                    .map(IllegalStateException::getMessage)
                    .collect(Collectors.joining("\n\t"));
            PluginIncompatibleException pie = new PluginIncompatibleException(
                    pluginDescriptor.getPlugin(),

    }

    private static String getMessage(Throwable error, String def) {
        if (error == null) {
            return def;
        }
        String msg = error.getMessage();
        if (msg != null && !msg.isEmpty()) {
            return msg;
        }
        return getMessage(error.getCause(), def);
    }

            request.setTrace(trace);
            pomArtifact = resolver.resolveArtifact(session, request).getArtifact();
        } catch (ArtifactResolutionException e) {
            throw new UnresolvableModelException(e.getMessage(), groupId, artifactId, version, e);
        }

        Path pomFile = pomArtifact.getPath();

        return new FileModelSource(pomFile);
    }

    @Override

                return build(source, nsUri, xsr);
            }
        } catch (XMLStreamException | IOException e) {
            throw new PlexusConfigurationException(e.getMessage(), e);
        }
    }

    /**
     * @deprecated use {@link #build(StreamSupplier, String)}
     */
    @Deprecated

        try {
            pomMap = PomDiscovery.discoverPoms(startingDirectory);
        } catch (IOException | DomTripException e) {
            context.failure("Failed to discover POM files: " + e.getMessage());
            return 1;
        }

        if (pomMap.isEmpty()) {
            context.warning("No POM files found in " + startingDirectory);
            return 0;
        }