public static final String PATH_SEPARATOR = System.getProperty("path.separator");

    /**
     * <code>os.name</code> system property. Example: <code>Mac OS X</code>
     */
    public static final String OS_NAME = System.getProperty("os.name");

    /**
     * <code>java.io.tmpdir</code> system property. Example: /tmp
     */
    public static final String JAVA_IO_TMPDIR = System.getProperty("java.io.tmpdir");

    /**

        MavenPropertiesLoader.loadProperties(p, mavenUserProps, p::getProperty, false);
        assertEquals("bar", p.getProperty("foo"));
        assertNull(p.getProperty("foo-env"));

        p = new Properties();
        p.put("user.home", userDirectory.toString());
        p.put("env.envName", "ci");
        MavenPropertiesLoader.loadProperties(p, mavenUserProps, p::getProperty, false);
        assertEquals("bar-env", p.getProperty("foo"));

        for (DependencyNode child : root.getChildren()) {
            if (child.getArtifact() == null) {
                continue;
            }
            String childType = child.getArtifact().getProperty(ArtifactProperties.TYPE, "");
            if (!PROCESSOR_TYPE_IDS.contains(childType)) {
                continue;
            }
            for (DependencyNode transitive : child.getChildren()) {

import org.jspecify.annotations.Nullable;

/**
 * Represents a {@linkplain System#getProperties() standard system property}.
 *
 * @author Kurt Alfred Kluever
 * @since 15.0
 */
@GwtIncompatible // java.lang.System#getProperty
public enum StandardSystemProperty {

  /** Java Runtime Environment version. */
  JAVA_VERSION("java.version"),

  /** Java Runtime Environment vendor. */
  JAVA_VENDOR("java.vendor"),

import org.jspecify.annotations.Nullable;

/**
 * Represents a {@linkplain System#getProperties() standard system property}.
 *
 * @author Kurt Alfred Kluever
 * @since 15.0
 */
@GwtIncompatible // java.lang.System#getProperty
public enum StandardSystemProperty {

  /** Java Runtime Environment version. */
  JAVA_VERSION("java.version"),

  /** Java Runtime Environment vendor. */
  JAVA_VENDOR("java.vendor"),

        return profile.getActivation() != null && profile.getActivation().getProperty() != null;
    }

    @Override
    public boolean isActive(Profile profile) throws ProfileActivationException {
        Activation activation = profile.getActivation();

        ActivationProperty property = activation.getProperty();

        if (property != null) {
            String name = property.getName();

        }

        if (localRepositoryPath == null || localRepositoryPath.isEmpty()) {
            String path = request.getUserProperties().getProperty(Constants.MAVEN_USER_CONF);
            if (path == null) {
                path = request.getSystemProperties().getProperty("user.home") + File.separator + ".m2";
            }
            localRepositoryPath = new File(path, "repository").getAbsolutePath();
        }

                if (node.getArtifact().getProperties().containsKey(ArtifactProperties.TYPE)) {
                    currentType = registry.get(node.getArtifact()
                            .getProperty(
                                    ArtifactProperties.TYPE, node.getArtifact().getExtension()));
                    if (currentType == null) {
                        currentType = jar;
                    }

    @Override
    public boolean traverseDependency(Dependency dependency) {
        requireNonNull(dependency, "dependency cannot be null");
        String prop = dependency.getArtifact().getProperty(MavenArtifactProperties.INCLUDES_DEPENDENCIES, "");
        return !Boolean.parseBoolean(prop);
    }

    @Override
    public DependencyTraverser deriveChildTraverser(DependencyCollectionContext context) {

@NullUnmarked
@GwtIncompatible
@J2ktIncompatible
final class ClassPathUtil {
  private ClassPathUtil() {}

  /**
   * Returns the URLs in the class path specified by the {@code java.class.path} {@linkplain
   * System#getProperty system property}.
   */
  // TODO(b/65488446): Make this a public API.
  static URL[] parseJavaClassPath() {
    ImmutableList.Builder<URL> urls = ImmutableList.builder();