</scm>
  <build>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <executions>
          <execution>
            <id>test</id>
            <phase>package</phase>
            <goals>
              <goal>compile</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>

            // MNG-1911 / MNG-5572: Building plugins with extensions cannot be part of reactor
            for (Plugin plugin : project.getBuildPlugins()) {
                if (plugin.isExtensions()) {
                    String pluginKey =
                            ArtifactUtils.key(plugin.getGroupId(), plugin.getArtifactId(), plugin.getVersion());

                    if (projectsMap.containsKey(pluginKey)) {

  <modelVersion>4.0.0</modelVersion>
  <groupId>maven</groupId>
  <artifactId>p0</artifactId>
  <packaging>pom</packaging>
  <version>1.0</version>

  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <executions>
          <execution>
            <id>test</id>

            <!--  The key to this test... -->

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

import org.apache.maven.model.Plugin;
import org.apache.maven.plugin.prefix.PluginPrefixResult;
import org.eclipse.aether.repository.ArtifactRepository;

/**
 * Describes the result of a plugin prefix resolution request.
 *
 * @since 3.0
 */

                        for (Plugin managedPlugin : pluginMgmt.getPlugins()) {
                            Object key = getPluginKey(managedPlugin);
                            Plugin addedPlugin = added.get(key);
                            if (addedPlugin != null) {
                                Plugin plugin = managedPlugin.clone();
                                mergePlugin(plugin, addedPlugin, sourceDominant, Collections.emptyMap());

import org.apache.maven.api.MojoExecution;
import org.apache.maven.api.Node;
import org.apache.maven.api.Plugin;
import org.apache.maven.api.model.PluginExecution;
import org.apache.maven.api.plugin.descriptor.MojoDescriptor;
import org.apache.maven.api.plugin.descriptor.PluginDescriptor;
import org.apache.maven.api.plugin.descriptor.lifecycle.Lifecycle;
import org.apache.maven.api.xml.XmlNode;
import org.apache.maven.impl.DefaultNode;

        <!-- That's the boolean POM field we would like to interpolate -->
        <filtering>${filter.resources}</filtering>
      </resource>
    </resources>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.its.plugins</groupId>
        <artifactId>maven-it-plugin-expression</artifactId>
        <version>2.1-SNAPSHOT</version>
        <configuration>
          <outputFile>target/expression.properties</outputFile>

        StringBuilder indent = new StringBuilder();
        ArrayList<String> trackingData = new ArrayList<>();

        if (collectStepTrace == null && plugin != null) {
            ext = ".plugin";
            baseName = plugin.getGroupId() + "_" + plugin.getArtifactId() + "_" + plugin.getVersion();
            trackingFile = trackingDir.resolve(baseName + ext);
            if (Files.exists(trackingFile)) {
                return;

            List<Plugin> src = source.getPlugins();
            if (!src.isEmpty()) {
                List<Plugin> tgt = target.getPlugins();

                Map<Object, Plugin> managedPlugins = new LinkedHashMap<>(src.size() * 2);

                Map<Object, Object> context = Collections.emptyMap();

                for (Plugin element : src) {

import org.apache.maven.model.Plugin;

/**
 * PluginArtifact
 */
public class PluginArtifact extends DefaultArtifact implements ArtifactWithDependencies {
    private Plugin plugin;

    public PluginArtifact(Plugin plugin, Artifact pluginArtifact) {
        super(
                plugin.getGroupId(),
                plugin.getArtifactId(),
                plugin.getVersion(),
                null,