maven life-cycle execution listener

LifecycleParticipant.java

/*
 * Copyright (c) 2020 Oracle and/or its affiliates. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.helidon.build.maven;

import org.apache.maven.AbstractMavenLifecycleParticipant;
import org.apache.maven.MavenExecutionException;
import org.apache.maven.execution.AbstractExecutionListener;
import org.apache.maven.execution.ExecutionEvent;
import org.apache.maven.execution.MavenSession;
import org.apache.maven.plugin.MojoExecution;
import org.codehaus.plexus.component.annotations.Component;

@Component(role = AbstractMavenLifecycleParticipant.class)
public class LifecycleParticipant extends AbstractMavenLifecycleParticipant {

    private final LifecycleExecutionListener listener;

    public LifecycleParticipant() {
         listener = new LifecycleExecutionListener();
    }

    @Override
    public void afterProjectsRead(MavenSession session) throws MavenExecutionException {
        session.getRequest().setExecutionListener(listener);
    }

    private static final class LifecycleExecutionListener extends AbstractExecutionListener {

        private String phase;

        @Override
        public void mojoStarted(ExecutionEvent event) {
            MojoExecution mojoExecution = event.getMojoExecution();
            if (mojoExecution != null) {
                String currentPhase = mojoExecution.getLifecyclePhase();
                if (!currentPhase.equals(phase)) {
                    phase = currentPhase;
                    System.out.println("LIFECYCLE: " + phase);
                }
            }
        }
    }
}

pom.xml

            <plugin>
                <groupId>org.codehaus.plexus</groupId>
                <artifactId>plexus-component-metadata</artifactId>
                <version>2.1.0</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>generate-metadata</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>