import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import static java.util.Comparator.comparing;

/**
 * Builds the {@link ProjectDependencyGraph inter-dependencies graph} between projects in the reactor.
 */
@Named(GraphBuilder.HINT)
@Singleton
public class DefaultGraphBuilder implements GraphBuilder {
    private static final Logger LOGGER = LoggerFactory.getLogger(DefaultGraphBuilder.class);

                    .desc(
                            "Resume reactor from the last failed project, using the resume.properties file in the build directory")
                    .get());
            options.addOption(Option.builder(RESUME_FROM)
                    .longOpt("resume-from")
                    .hasArg()
                    .desc("Resume reactor from specified project")
                    .get());

            // Verify correct behavior for reactor parent:
            // - groupId should be removed (child has no explicit groupId, parent is in reactor)
            // - artifactId should be removed (can be inferred from relativePath)
            // - version should be removed (child has no explicit version, parent is in reactor)
            assertNull(parentElement.child("groupId").orElse(null));

    //
    // 4) Create MavenSession.
    //
    // 5) Execute AbstractLifecycleParticipant.afterSessionStart(session)
    //
    // 6) Get reactor projects looking for general POM errors
    //
    // 7) Create ProjectDependencyGraph using trimming which takes into account --projects and reactor mode.
    // This ensures that the projects passed into the ReactorReader are only those specified.
    //

              <bomDescription>Bill Of Materials for Apache Maven - Maven JARS only</bomDescription>
              <outputFilename>maven-skinny-bom.xml</outputFilename>
              <reactorDependencies>REACTOR</reactorDependencies>
              <transitiveDependencies>NONE</transitiveDependencies>
              <usePropertiesForVersion>true</usePropertiesForVersion>
              <attach>true</attach>
            </configuration>

        hasChanges |= trimParentElementLimited(context, root, parentElement);

        // Only remove parent elements if the parent is in the same reactor (not external)
        if (isParentInReactor(parentElement, pomMap, context)) {
            // Remove parent groupId if child has no explicit groupId
            if (childGroupId == null) {

    // Reactor Failure Mode
    // ----------------------------------------------------------------------

    String REACTOR_FAIL_FAST = "FAIL_FAST";

    String REACTOR_FAIL_AT_END = "FAIL_AT_END";

    String REACTOR_FAIL_NEVER = "FAIL_NEVER";

    // ----------------------------------------------------------------------
    // Reactor Make Mode

        if (t instanceof Exception exception && !(t instanceof RuntimeException)) {
            eventCatapult.fire(ExecutionEvent.Type.ProjectFailed, currentSession, null, exception);
        }

        // reactor failure modes
        if (t instanceof RuntimeException || !(t instanceof Exception)) {
            // fail fast on RuntimeExceptions, Errors and "other" Throwables

    public void sessionStarted(ExecutionEvent event) {
        if (logger.isInfoEnabled() && event.getSession().getProjects().size() > 1) {
            init();
            infoLine('-');

            infoMain("Reactor Build Order:");

            logger.info("");

            final List<MavenProject> projects = event.getSession().getProjects();
            for (MavenProject project : projects) {

                .desc(
                        "Resume reactor from the last failed project, using the resume.properties file in the build directory")
                .build());
        options.addOption(Option.builder(RESUME_FROM)
                .longOpt("resume-from")
                .hasArg()
                .desc("Resume reactor from specified project")
                .build());