}

    /**
     * Test <a href="https://issues.apache.org/jira/browse/MNG-5568">MNG-5568</a> edge case
     * which was showing transitive inconsistency: since A &gt; B and B &gt; C then we should have A &gt; C
     * otherwise sorting a list of ComparableVersions() will in some cases throw runtime exception;
     * see Netbeans issues <a href="https://netbeans.org/bugzilla/show_bug.cgi?id=240845">240845</a> and

     */
    private static final String FAMILY_OS400 = "os/400";

    /**
     * OpenJDK is reported to call MacOS X "Darwin"
     *
     * @see <a href="https://issues.apache.org/bugzilla/show_bug.cgi?id=44889">bugzilla issue</a>
     * @see <a href="https://issues.apache.org/jira/browse/HADOOP-3318">HADOOP-3318</a>
     */
    private static final String DARWIN = "darwin";

    /**
     * The path separator.
     */

                    Dependency present = dependencies.putIfAbsent(key, dependency);
                    if (present != null && !equals(dependency, present) && !directDependencies.contains(key)) {
                        // TODO: https://issues.apache.org/jira/browse/MNG-8004
                        problems.add(
                                Severity.WARNING,
                                Version.V40,

the concept of a project object model (POM), Maven can manage a project's
build, reporting and documentation from a central piece of information.

If you think you have found a bug, please file an issue in the [Maven Issue Tracker][jira].

Documentation
-------------

More information can be found on [Apache Maven Homepage][maven-home].
Questions related to the usage of Maven should be posted on

  <description>Commons Logging is a thin adapter allowing configurable bridging to other,
    well known logging systems.</description>
  <url>http://jakarta.apache.org/commons/logging/</url>
  <issueManagement>
    <url>http://issues.apache.org/bugzilla/</url>
  </issueManagement>
  <ciManagement>
    <notifiers>
      <notifier>
        <configuration>
          <address>******@****.***</address>
        </configuration>

    <tag>maven-4.0.0-alpha-10</tag>
    <url>https://github.com/apache/maven/tree/${project.scm.tag}/${project.artifactId}</url>
  </scm>
  <issueManagement>
    <system>jira</system>
    <url>https://issues.apache.org/jira/browse/MNG</url>
  </issueManagement>
  <ciManagement>
    <system>Jenkins</system>
    <url>https://ci-maven.apache.org/job/Maven/job/maven-box/job/maven/</url>
  </ciManagement>

    /**
     * During normal command line build, ClassWorld is loaded by jvm system classloader, which only includes
     * plexus-classworlds jar and possibly javaagent classes, see https://issues.apache.org/jira/browse/MNG-4747.
     * <p>
     * Using ClassWorld to determine plugin/extensions realm parent classloaders gives m2e and integration test harness

     * We also lock on a given project to forbid a forked lifecycle to be executed concurrently with the project.
     * TODO: ideally, the builder should take care of the ordering in a smarter way
     * TODO: and concurrency issues fixed with MNG-7157
     */
    private class ProjectLock implements AutoCloseable {
        final Lock acquiredAggregatorLock;
        final OwnerReentrantLock acquiredProjectLock;

        assertEquals("https://project.url/scm", pom.getValue("scm/developerConnection"));
        assertEquals("TAG", pom.getValue("scm/tag"));

        assertEquals("issues", pom.getValue("issueManagement/system"));
        assertEquals("https://project.url/issues", pom.getValue("issueManagement/url"));

        assertEquals("ci", pom.getValue("ciManagement/system"));

/**
 * Service responsible for validating plugin configuration.
 *
 */
public interface MavenPluginConfigurationValidator {
    /**
     * Checks mojo configuration issues.
     */
    void validate(
            MavenSession mavenSession,
            MojoDescriptor mojoDescriptor,
            Class<?> mojoClass,
            PlexusConfiguration pomConfiguration,