return userProperties;
    }

    /**
     * Sets the user properties to use for interpolation and profile activation. The user properties have been
     * configured directly by the user on his discretion, e.g. via the {@code -Dkey=value} parameter on the command
     * line.
     *
     * @param userProperties The user properties, may be {@code null}.
     * @return This context, never {@code null}.
     */

<!--
 | This is the configuration file for Maven. It can be specified at two levels:
 |
 |  1. User Level. This settings.xml file provides configuration for a single user,
 |                 and is normally provided in ${user.home}/.m2/settings.xml.
 |
 |                 NOTE: This location can be overridden with the CLI option:
 |
 |                 -s /path/to/user/settings.xml
 |

  <inceptionYear>2001</inceptionYear>
  <mailingLists>
    <mailingList>
      <name>Plexus User List</name>
      <subscribe>http://xircles.codehaus.org/manage_email/user%40plexus.codehaus.org</subscribe>
      <unsubscribe>http://xircles.codehaus.org/manage_email/user%40plexus.codehaus.org</unsubscribe>
      <archive>http://archive.plexus.codehaus.org/user</archive>
    </mailingList>
    <mailingList>
      <name>Plexus Developer List</name>

KIND, either express or implied.  See the License for the
specific language governing permissions and limitations
under the License.
-->

<settings>
  <localRepository>${user.home}/.m2/repository</localRepository>

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.exception;

/**
 * Transform an exception into useful end-user message.
 *
 * @since 3.0-alpha-3
 */
public interface ExceptionHandler {
    ExceptionSummary handleException(Throwable e);

 *
 */
class GlobalSettingsTest {

    @Test
    void testValidGlobalSettings() throws Exception {
        String basedir = System.getProperty("basedir", System.getProperty("user.dir"));

        File globalSettingsFile = new File(basedir, "src/assembly/maven/conf/settings.xml");
        assertTrue(globalSettingsFile.isFile(), globalSettingsFile.getAbsolutePath());

                        .source(ModelSource.fromPath(pomArtifact.getPath(), gav))
                        // This merge is on purpose because otherwise user properties would override model
                        // properties in dependencies the user does not know. See MNG-7563 for details.
                        .systemProperties(toProperties(session.getUserProperties(), session.getSystemProperties()))

     * </ul>
     * Note that for the sake of independence from the user
     * environment, the filesystem is intentionally not used for the calculation.</p>
     *
     * @param child The child model, must not be <code>null</code>.
     * @param parent The parent model, may be <code>null</code>.

 */
package org.apache.maven.exception;

import java.util.Collections;
import java.util.List;

/**
 * Provide a summary of the exception, containing:<ul>
 * <li>the exception itself,</li>
 * <li>useful end-user message,</li>
 * <li>useful reference to a solution, or set of solutions: this is usually a wiki page url in
 * <a href="http://cwiki.apache.org/confluence/display/MAVEN/">http://cwiki.apache.org/confluence/display/MAVEN/</a>,

     * from the information that is available at the point the problem occurs and as such merely serves as a best effort
     * to provide information to the user to track the problem back to its origin.
     *
     * @return The identifier of the model from which the problem originated or an empty string if unknown, never
     *         {@code null}.
     */
    String getModelId();