<id>extension</id>
  <name>ExtensionDescriptor</name>
  <description><![CDATA[
    Extension descriptor, stored in <code>META-INF/maven/extension.xml</code> in an extension's jar artifact to
    precisely control parts of the extension and dependencies to expose in the API class loader.

      | provoke linkage errors for wagons contributed by build extensions. We also don't need to exclude the wagons
      | from plugins. Plugins that use wagons directly and declare the corresponding dependency will simply use a
      | wagon from their plugin realm.
     -->
  </exportedArtifacts>
</extension>

  xml.namespace="http://maven.apache.org/EXTENSIONS/${version}"
  xml.schemaLocation="https://maven.apache.org/xsd/core-extensions-${version}.xsd">

  <id>core-extensions</id>
  <name>CoreExtensions</name>
  <description><![CDATA[
  <p>This is a reference for the Core Extensions descriptor.</p>
  <p>The default location for the Core Extensions descriptor file is <code>${maven.projectBasedir}/.mvn/extensions.xml</code></p>
  ]]></description>

  ~ See the License for the specific language governing permissions and
  ~ limitations under the License.
  -->

<extensions>
  <extension>
    <groupId>com.gradle</groupId>
    <artifactId>develocity-maven-extension</artifactId>
    <version>2.3</version>
  </extension>

~~ under the License.

 ---
 Maven Core Extensions Reference
 ---
 Hervé Boutemy
 ---
 2016-06-25
 ---

Maven Core Extensions Reference

  Maven core provides default {{{./extension.html}extensions}} as defined in <<</META-INF/maven/extension.xml>>>:

                cause);
        this.extension = extension;
    }

    /**
     * Constructor accepting the new API type for internal use.
     *
     * @param extension the new API extension
     * @param cause the cause
     */
    public ExtensionResolutionException(org.apache.maven.api.cli.extensions.CoreExtension extension, Throwable cause) {
        super(

  <description>
    Test that build extensions are properly merged during inheritance.
  </description>

  <build>
    <!-- project extensions should precede inherited extensions -->
    <extensions>
      <extension>
        <groupId>org.apache.maven.its.mng3899</groupId>
        <artifactId>b</artifactId>
        <version>0.1</version>
      </extension>
      <extension>

import org.apache.maven.api.cli.Logger;
import org.apache.maven.api.cli.extensions.CoreExtension;
import org.apache.maven.api.services.MessageBuilderFactory;
import org.apache.maven.api.services.SettingsBuilder;
import org.apache.maven.cling.extensions.BootstrapCoreExtensionManager;
import org.apache.maven.cling.extensions.ExtensionConfigurationModule;
import org.apache.maven.cling.extensions.LoadedCoreExtension;

                        + cause.getMessage(),
                cause);
        this.extension = extension;
    }

    public CoreExtension getExtension() {
        return extension;
    }

        if (build != null) {
            for (Extension extension : build.getExtensions()) {
                Plugin plugin = new Plugin();
                plugin.setGroupId(extension.getGroupId());
                plugin.setArtifactId(extension.getArtifactId());
                plugin.setVersion(extension.getVersion());
                XmlNode configuration = extension.getDelegate().getConfiguration();