sitedocs-extras/tycho-custom-bundle-plugin/src/it/custom-bundle-parent/custom.bundle/pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project>
  <modelVersion>4.0.0</modelVersion>

  <parent>
    <groupId>tycho-extras-its-project</groupId>
    <artifactId>custom-bundle-parent</artifactId>
    <version>1.0.0-SNAPSHOT</version>
  </parent>

  <artifactId>custom.bundle</artifactId>
  <packaging>eclipse-plugin</packaging>

  <build>
    <plugins>
      <plugin>
        <groupId>org.eclipse.tycho.extras</groupId>
        <artifactId>tycho-custom-bundle-plugin</artifactId>
        <version>${tycho-version}</version>
        <executions>
          <execution>
            <id>attached</id>
            <phase>package</phase>
            <goals>
              <goal>custom-bundle</goal>
            </goals>
            <configuration>
              <bundleLocation>${project.basedir}/custom</bundleLocation>
              <classifier>attached</classifier>
              <fileSets>
                <fileSet>
                  <directory>${project.build.outputDirectory}</directory>
                  <includes>
                    <include>**/*.class</include>
                  </includes>
                </fileSet>
              </fileSets>
            </configuration>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <groupId>org.eclipse.tycho</groupId>
        <artifactId>tycho-p2-plugin</artifactId>
        <version>${tycho-version}</version>
        <executions>
          <execution>
            <id>attached-p2-metadata</id>
            <phase>package</phase>
            <goals>
              <goal>p2-metadata</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>
</project>