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;
        }

    public void transferFailed(TransferEvent event) {
        transferCompleted(event);

        println(
                "transferFailed",
                event.getException().getClass() + ": " + event.getException().getMessage());
    }

    private void transferCompleted(TransferEvent event) {
        downloads.remove(event.getResource());

        StringBuilder buffer = new StringBuilder(64);
        pad(buffer, lastLength);

            this.cycle = cycle;
        }

        public List<String> getCycle() {
            return cycle;
        }

        @Override
        public String getMessage() {
            return super.getMessage() + " " + String.join(" --> ", cycle);
        }
    }

            return new Metadata(new MetadataStaxReader().read(input, false));
        } catch (IOException | XMLStreamException e) {
            throw new RepositoryException("Could not parse metadata " + metadataPath + ": " + e.getMessage(), e);
        }
    }

    private void write(Path metadataPath, Metadata metadata) throws RepositoryException {
        try {
            Files.createDirectories(metadataPath.getParent());

  @Override
  public final void tearDown() {
    try {
      sloppyTearDown();
    } catch (Throwable t) {
      logger.log(Level.INFO, "exception thrown during tearDown: " + t.getMessage(), t);
    }
  }

  public abstract void sloppyTearDown() throws Exception;

            return CANCELED;
        } catch (Exception e) {
            if (context.options().showErrors().orElse(false)) {
                context.logger.error(e.getMessage(), e);
            } else {
                context.logger.error(e.getMessage());
            }
            return ERROR;
        }
    }

    protected int badGoalsErrorMessage(String message, EncryptContext context) {

            return CANCELED;
        } catch (Exception e) {
            if (context.options().showErrors().orElse(false)) {
                context.logger.error(e.getMessage(), e);
            } else {
                context.logger.error(e.getMessage());
            }
            return ERROR;
        }
    }

    protected int badGoalsErrorMessage(String message, UpgradeContext context) {

        ProjectBuildingException e = assertThrows(
                ProjectBuildingException.class, () -> getProject(f1), "Expected to fail for future versions");
        assertTrue(e.getMessage().contains("Building this project requires a newer version of Maven"));
    }

    @Test
    void testPastModelVersion() throws Exception {
        // a Maven 1.x pom will not even

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

            pomFile = pomArtifact.getFile();
        }

        return new FileModelSource(pomFile);
    }

    @Override

            PrintStream ps = new PrintStream(os);
            ps.println(
                    "A required class was missing while executing " + mojoDescriptor.getId() + ": " + e.getMessage());
            pluginRealm.display(ps);
            Exception wrapper = new PluginContainerException(mojoDescriptor, pluginRealm, os.toString(), e);