m2e plugin

lifecycle-mapping-metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<lifecycleMappingMetadata>
	<pluginExecutions>
		<pluginExecution>
			<pluginExecutionFilter>
				<groupId>org.jvnet.localizer</groupId>
				<artifactId>maven-localizer-plugin</artifactId>
				<versionRange>[1.0,2.0)</versionRange>
				<goals>
					<goal>generate</goal>
				</goals>
			</pluginExecutionFilter>
			<action>
				<configurator>
					<id>net.dahanne.eclipse.m2e.localizer.localizerProjectConfigurator</id>
				</configurator>
			</action>
		</pluginExecution>
	</pluginExecutions>
</lifecycleMappingMetadata>

LocalizerDefaultGenerateSourcesBuildParticipant.java

package net.dahanne.eclipse.m2e.localizer;

import java.io.File;
import java.util.Set;

import org.apache.maven.plugin.MojoExecution;
import org.apache.maven.project.MavenProject;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.m2e.core.MavenPlugin;
import org.eclipse.m2e.core.embedder.IMaven;
import org.eclipse.m2e.core.project.configurator.MojoExecutionBuildParticipant;
import org.sonatype.plexus.build.incremental.BuildContext;

public class LocalizerDefaultGenerateSourcesBuildParticipant extends MojoExecutionBuildParticipant {

	public LocalizerDefaultGenerateSourcesBuildParticipant(MojoExecution execution) {
		super(execution, true);
	}

	@Override
	public Set<IProject> build(int kind, IProgressMonitor monitor) throws Exception {

		IMaven maven = MavenPlugin.getMaven();
		BuildContext buildContext = getBuildContext();

		// execute mojo
		Set<IProject> result = super.build(kind, monitor);

		// tell m2e builder to refresh generated files		
		MavenProject mavenProject = getSession().getCurrentProject();
		File generated = maven.getMojoParameterValue(mavenProject, getMojoExecution(), "generated-sources",  File.class, monitor);
		if (generated != null) {
			buildContext.refresh(generated);
		}

		return result;
	}

}

LocalizerProjectConfigurator.java

package net.dahanne.eclipse.m2e.localizer;

import java.io.File;

import org.apache.maven.plugin.MojoExecution;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.m2e.core.lifecyclemapping.model.IPluginExecutionMetadata;
import org.eclipse.m2e.core.project.IMavenProjectFacade;
import org.eclipse.m2e.core.project.configurator.AbstractBuildParticipant;
import org.eclipse.m2e.core.project.configurator.ProjectConfigurationRequest;
import org.eclipse.m2e.jdt.AbstractSourcesGenerationProjectConfigurator;

public class LocalizerProjectConfigurator extends AbstractSourcesGenerationProjectConfigurator {
	@Override
	public AbstractBuildParticipant getBuildParticipant(IMavenProjectFacade projectFacade, MojoExecution execution,
	    IPluginExecutionMetadata executionMetadata) {
			return new LocalizerDefaultGenerateSourcesBuildParticipant(execution);
	}

	@Override
	@SuppressWarnings("deprecation")
	protected File[] getSourceFolders(ProjectConfigurationRequest request, MojoExecution mojoExecution, IProgressMonitor monitor) throws CoreException {
		// there is no variable to reference aidl generated classes, so we have
		// to guess
		File aidlGeneratedSourcesFolder = new File(request.getProject().getLocation().toOSString() + "/../"
				+ request.getMavenProjectFacade().getOutputLocation().toOSString() + "/../generated-sources/localizer");
		// not yet implemented in android maven plugin (as of 3.0.0-alpha13)
    File[] generatedSourcesFolders = new File[] {
				getParameterValue("generated-sources", File.class, request.getMavenSession(), mojoExecution),
				aidlGeneratedSourcesFolder };

		return generatedSourcesFolders;
	}
	
}

plugin.xml

<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.4"?>
<plugin>
    <extension
          point="org.eclipse.m2e.core.projectConfigurators">
       <configurator
             class="net.dahanne.eclipse.m2e.localizer.LocalizerProjectConfigurator"
             id="net.dahanne.eclipse.m2e.localizer.localizerProjectConfigurator"
             name="Localizer m2eclipse Configurator">
       </configurator>
    </extension>
    <extension
          point="org.eclipse.m2e.core.lifecycleMappingMetadataSource">
    </extension>
</plugin>