LocalRepository localRepository,
            List<RemoteRepository> remoteRepositories) {
        super("No plugin found for prefix '" + prefix + "' in the current project and in the plugin groups "
                + pluginGroups + " available from the repositories " + format(localRepository, remoteRepositories));
    }

    MavenExecutionRequest populateFromToolchains(MavenExecutionRequest request, PersistedToolchains toolchains)
            throws MavenExecutionRequestPopulationException;

    /**
     * Injects default values like plugin groups or repositories into the specified execution request.
     *
     * @param request The execution request to populate, must not be {@code null}.
     * @return The populated execution request, never {@code null}.

        }

        // <mirrors>
        //   <mirror>
        //     <id>nexus</id>
        //     <mirrorOf>*</mirrorOf>
        //     <url>http://repository.sonatype.org/content/groups/public</url>
        //   </mirror>
        // </mirrors>

        for (Mirror mirror : settings.getMirrors()) {
            mirror = mirror.clone();

            request.addMirror(mirror);
        }

        boolean matched = false;
        for (Iterator<String> i = patterns.iterator(); i.hasNext() & !matched; ) {
            // TODO what about wildcards? Just specifying groups? versions?
            if (id.equals(i.next())) {
                matched = true;
            }
        }
        return matched;
    }

    public List<String> getPatterns() {

        artifactResolver.resolveTransitively(
                Collections.singleton(g), projectArtifact, remoteRepositories(), localRepository(), null);

        // we want to see all top-level thread groups
        ThreadGroup tg = Thread.currentThread().getThreadGroup();
        while (tg.getParent() == null) {
            tg = tg.getParent();
        }

        ThreadGroup[] tgList = new ThreadGroup[tg.activeGroupCount()];

    // Mirrors
    List<Mirror> getMirrors();

    MavenExecutionRequest setMirrors(List<Mirror> mirrors);

    MavenExecutionRequest addMirror(Mirror mirror);

    // Plugin groups
    List<String> getPluginGroups();

    MavenExecutionRequest setPluginGroups(List<String> pluginGroups);

    MavenExecutionRequest addPluginGroup(String pluginGroup);

            Artifact artifact = result.getArtifact();
            Map<String, String> props = new HashMap<>(artifact.getProperties());
            props.put(ArtifactProperties.DOWNLOAD_URL, downloadUrl);
            result.setArtifact(artifact.setProperties(props));
        }
    }

     * variable lookup.
     *
     * @param props The properties to add the environment variables to, may be {@code null}.
     */
    public static void addEnvVars(Properties props) {
        if (props != null) {
            if (envVars == null) {
                Properties tmp = new Properties();

    /**
     * Gets the list of group ids to scan for the plugin prefix.
     *
     * @return The list of group ids to scan for the plugin prefix, never {@code null}.
     */
    List<String> getPluginGroups();

    /**
     * Sets the list of group ids to scan for the plugin prefix.
     *
     * @param pluginGroups The list of group ids to scan for the plugin prefix, may be {@code null}.

    <version>1</version>

    <build>
      <plugins>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <dependencies>
            <dependency>
              <groupId>group</groupId>
              <artifactId>first</artifactId>
              <version>1</version>
            </dependency>
          </dependencies>
          <executions>
            <execution>
              <id>first</id>