* MNG-2277, the check below compensates for our bad plugin support where we ended up with aggregator
             * plugins that require dependency resolution although they usually run in phases of the build where project
             * artifacts haven't been assembled yet. The prime example of this is "mvn release:prepare".
             */

    protected AbstractLifecycleProvider(String id, String[] phases, String[] pluginBindings) {
        HashMap<String, LifecyclePhase> defaultBindings = null;
        if (pluginBindings != null) {
            final int len = pluginBindings.length;

            if (len < 2 || len % 2 != 0) {
                throw new IllegalArgumentException("Plugin bindings must have more than 0, even count of elements");
            }

We have a lifecycle mapping for the packaging of *jar* below. You see that for this packaging we have a *default* lifecycle and a list of phases where each phase is a comma separated list of goals to run and they are in the form groupId:artifactId:version.

<configuration>
  <lifecycles>
    <lifecycle>
      <id>default</id>
      <phases>
        <process-resources>org.apache.maven.plugins:maven-resources-plugin:resources</process-resources>

                PACKAGE.getPhase(),
                "BEER",
                INSTALL.getPhase());

        // The two phases below are really for future expansion, some would say they lack a drink
        // The point being that they do not really have to match the "real" stuff,
        List<String> stubCleanCycle = Arrays.asList(PRE_CLEAN.getPhase(), CLEAN.getPhase(), POST_CLEAN.getPhase());

 * under the License.
 */
package org.apache.maven.api.plugin.annotations;

import org.apache.maven.api.annotations.Experimental;

/**
 * <a href="/ref/3.0.4/maven-core/lifecycles.html">Lifecycle phases</a>.
 *
 * @since 4.0.0
 */
@Experimental
public enum LifecyclePhase {
    VALIDATE("validate"),
    INITIALIZE("initialize"),
    GENERATE_SOURCES("generate-sources"),
    PROCESS_SOURCES("process-sources"),

import org.apache.maven.plugin.descriptor.MojoDescriptor;
import org.apache.maven.project.MavenProject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * <p>
 * Logs debug output from the various lifecycle phases.
 * </p>
 * <strong>NOTE:</strong> This class is not part of any public api and can be changed or deleted without prior notice.
 *
 * @since 3.0
 */
@Named
@Singleton
public class LifecycleDebugLogger {

     1. plugin goal execution in a child is usually simply appended (at end): you can't try to insert in the middle of pre-existing inherited executions,

     2. append happens at plugin level first, then goal level, independently from phases.
        This means for example that adding pluginA:goal2 to pre-existing (pluginA:goal1, pluginB:goal) will lead to (pluginA:goal1, pluginA:goal2, pluginB:goal)

     * those unresolved artifacts will be returned in the result set, allowing the caller to take special care of
     * artifacts that haven't been build yet.
     *
     * @param projects The projects whose dependencies should be resolved, may be {@code null}.
     * @param scopes   The dependency scopes that should be resolved, may be {@code null}.

                            + " or a goal in the format <plugin-prefix>:<goal> or"
                            + " <plugin-group-id>:<plugin-artifact-id>[:<plugin-version>]:<goal>. Available lifecycle phases are: "
                            + defaultLifecycles.getLifecyclePhaseList() + ".",
                    lifecyclePhase);
        }

        LifecycleMappingDelegate delegate;

entity. For the purposes of this definition, "control" means (i) the power, direct or indirect, to cause the direction or management of such entity, whether by contract or otherwise, or (ii) ownership of fifty percent (50%) or more of the outstanding shares, or (iii) beneficial ownership of such entity. "You" (or "Your") shall mean an individual or Legal Entity exercising permissions granted by this License. "Source" form shall mean the preferred form for making modifications, including but not limited...