toDelete.add(generatedFile.toAbsolutePath());
    }

    @PreDestroy
    private void doDeleteFiles() {
        for (Path file : toDelete) {
            try {
                Files.delete(file);
            } catch (IOException e) {
                // ignore, we did our best...
            }
        }
    }

        File file = artifact.getFile();

        File touchfile = getTouchfile(artifact);

        if (file.exists()) {
            touchfile.delete();
        } else {
            writeLastUpdated(touchfile, getRepositoryKey(repository), error);
        }
    }

    public void touch(RepositoryMetadata metadata, ArtifactRepository repository, File file) {

    Original Software available to a third party under the terms of this
    License.

    (d) Notwithstanding Section 2.1(b) above, no patent license is
    granted: (1) for code that You delete from the Original Software, or
    (2) for infringements caused by: (i) the modification of the
    Original Software, or (ii) the combination of the Original Software
    with other software or devices.

 * under the License.
 */
package org.apache.maven.lifecycle.internal;

/**
 * A task that is a lifecycle.
 * <p>
 * <strong>NOTE:</strong> This class is not part of any public api and can be changed or deleted without prior notice.
 *
 * @since 3.0
 */
public final class LifecycleTask extends Task {
    public LifecycleTask(String lifecyclePhase) {
        super(lifecyclePhase);
    }

/**
 * <p>
 * Component interface responsible for creation of MavenProject#dependencyArtifacts instances.
 * </p>
 * <strong>NOTE:</strong> This class is not part of any public api and can be changed or deleted without prior notice.
 *
 * @since 3.2.4
 */
public interface ProjectArtifactFactory {
    Set<Artifact> createArtifacts(MavenProject project) throws InvalidDependencyVersionException;

 * Assists in firing execution events. <strong>Warning:</strong> This is an internal utility interface that is only
 * public for technical reasons, it is not part of the public API. In particular, this interface can be changed or
 * deleted without prior notice.
 *
 */
public interface ExecutionEventCatapult {

    void fire(ExecutionEvent.Type eventType, MavenSession session, MojoExecution mojoExecution);

import org.apache.maven.execution.MavenExecutionResult;

/**
 * Context that is fixed for the entire reactor build.
 *
 * @since 3.0
 *         NOTE: This class is not part of any public api and can be changed or deleted without prior notice.
 */
public class ReactorContext {
    private final MavenExecutionResult result;

    private final ClassLoader originalContextClassLoader;

import org.apache.maven.lifecycle.internal.builder.BuilderCommon;
import org.apache.maven.project.MavenProject;

/**
 * <strong>NOTE:</strong> This class is not part of any public api and can be changed or deleted without prior notice.
 *
 * @since 3.0
 */
@Named
@Singleton
public class BuildListCalculator {
    public ProjectBuildList calculateProjectBuilds(MavenSession session, List<TaskSegment> taskSegments) {

import org.apache.maven.project.MavenProject;

/**
 * <p>
 * Provides the positional index of the project
 * </p>
 * <strong>NOTE:</strong> This class is not part of any public api and can be changed or deleted without prior notice.
 *
 * @since 3.0
 */
// TODO Kristian wonders if this class really is necessary and if it overlaps other concepts.
public final class ProjectIndex {

/**
 * Assists the project builder. <strong>Warning:</strong> This is an internal utility class that is only public for
 * technical reasons, it is not part of the public API. In particular, this class can be changed or deleted without
 * prior notice.
 *
 * @since 3.0
 */
public class EnvironmentUtils {

    private static Properties envVars;

    /**