public MetadataBridge(ArtifactMetadata metadata) {
        this.metadata = metadata;
    }

    public void merge(File current, File result) throws RepositoryException {
        try {
            if (current.exists()) {
                Files.createDirectories(result.toPath().getParent());
                Files.copy(current.toPath(), result.toPath());
            }
            ArtifactRepository localRepo = new MetadataRepository(result);

 * the {@code --resume} flag.
 */
public interface BuildResumptionAnalyzer {
    /**
     * Construct an instance of {@link BuildResumptionData} based on the outcome of the current Maven build.
     * @param result Outcome of the current Maven build.
     * @return A {@link BuildResumptionData} instance or {@link Optional#empty()} if resuming the build is not possible.
     */

    }

    @Override
    public Path getProjectDirectory() {
        return projectDirectory;
    }

    /**
     * Sets the base directory of the current project.
     *
     * @param projectDirectory The base directory of the current project, may be {@code null} if profile activation
     *                         happens in the context of metadata retrieval rather than project building.

    }

    public String toString() {
        return "JDK[" + getJavaHome() + "]";
    }

    public String findTool(String toolName) {
        Path toRet = findTool(toolName, Paths.get(getJavaHome()).normalize());
        if (toRet != null) {
            return toRet.toAbsolutePath().toString();
        }
        return null;
    }

    private static Path findTool(String toolName, Path installDir) {

            throws MojoNotFoundException, PluginResolutionException, PluginDescriptorParsingException,
                    InvalidPluginDescriptorException;

    /**
     * Verifies the specified plugin is compatible with the current Maven runtime.
     *
     * @param pluginDescriptor The descriptor of the plugin to check, must not be {@code null}.
     * @deprecated Use {@link #checkPrerequisites(PluginDescriptor)} instead.
     */
    @Deprecated

/**
 * Exception which is meant to occur when a layout specified for a particular
 * repository doesn't have a corresponding {@link org.apache.maven.artifact.repository.layout.ArtifactRepositoryLayout}
 * component in the current container.
 *
 */
@Deprecated
public class UnknownRepositoryLayoutException extends InvalidRepositoryException {

    private final String layoutId;

    private Plugin plugin;

    public PluginNotFoundException(Plugin plugin, ArtifactNotFoundException e) {
        super(
                "Plugin could not be found - check that the goal name is correct: " + e.getMessage(),
                e.getGroupId(),
                e.getArtifactId(),
                e.getVersion(),
                "maven-plugin",
                null,
                e.getRemoteRepositories(),

                String message = String.format(
                        "The project exclusion%s in --projects/-pl resulted in an "
                                + "empty reactor, please correct %s.",
                        isPlural ? "s" : "", isPlural ? "them" : "it");
                throw new MavenExecutionException(message, request.getPom());
            }
        }

        return result;
    }

For debugging purposes we also need to keep track of what versions of artifacts are being used so that when we are debugging in the IDE we can find the specific sources for a given version of a library so that the developer can debug the correct version of a library being used for a plugin.

h3. Discovery all Plexus components

commons-logging.properties file is found, all of the properties defined there are also used to set configuration attributes on the instantiated LogFactory instance. Once an implementation class name is selected, the corresponding class is loaded from the current Thread context class loader (if there is one), or from the class loader that loaded the LogFactory class itself otherwise. This allows a copy of commons-logging.jar to be shared in a multiple class loader environment (such as a servlet container),...