`mvn p2:site` Esse XML gera um update site pra aplicações RCP, tipo mágica mesmo.

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>org.reficio.rcp</groupId>
  <artifactId>example-p2-site</artifactId>
  <packaging>pom</packaging>
  <version>1.0.0</version>

  <build>
    <plugins>
      <plugin>
        <groupId>org.reficio</groupId>
        <artifactId>p2-maven-plugin</artifactId>
        <version>1.0.2-SNAPSHOT</version>
        <executions>
          <execution>
            <id>default-cli</id>
            <!-- This is the default quick-start configuration. The following 
              definition of an artifact: <artifact> <id>commons-io:commons-io:2.1</id> 
              </artifact> is an equivalent of the following definition: <artifact> <id>commons-io:commons-io:2.1</id> 
              <transitive>true</transitive> <source>false</source> <override>false</override> 
              <instructions> <Import-Package>*;resolution:=optional</Import-Package> <Export-Package>*</Export-Package> 
              </instructions> <excludes/> </artifact> -->
            <configuration>
              <artifacts>
                <!-- Commons -->
                <artifact>
                  <id>commons-beanutils:commons-beanutils:1.8.3</id>
                </artifact>
                <artifact>
                  <id>commons-lang:commons-lang:2.6</id>
                </artifact>
                <artifact>
                  <id>commons-collections:commons-collections:3.2.1</id>
                </artifact>
                <artifact>
                  <id>commons-digester:commons-digester:2.1</id>
                </artifact>
                <artifact>
                  <id>commons-logging:commons-logging:1.1.3</id>
                </artifact>
                <artifact>
                  <id>org.apache.httpcomponents:httpclient:4.2.5</id>
                </artifact>
                <artifact>
                  <id>org.apache.httpcomponents:httpcore:4.2.4</id>
                </artifact>

                <!-- Misc -->
                <artifact>
                  <id>log4j:log4j:1.2.17</id>
                </artifact>
                <artifact>
                  <id>com.google.code.gson:gson:2.2.4</id>
                </artifact>

                <!-- Guice ! -->
                <artifact>
                  <id>com.google.inject.extensions:guice-multibindings:3.0</id>
                </artifact>
                <artifact>
                  <id>com.google.inject.extensions:guice-assistedinject:3.0</id>
                </artifact>
                <artifact>
                  <id>com.google.inject.extensions:guice-persist:3.0</id>
                </artifact>
                <artifact>
                  <id>com.google.inject.extensions:guice-throwingproviders:3.0</id>
                </artifact>
                <artifact>
                  <id>com.google.inject.extensions:guice-jmx:3.0</id>
                </artifact>
                <artifact>
                  <id>com.google.code.guice:guice:1.0</id>
                </artifact>

                <!-- Peaberry -->
                <artifact>
                  <id>org.ops4j:peaberry:1.3</id>
                </artifact>
                <artifact>
                  <id>org.ops4j.peaberry.extensions:peaberry.activation:1.3</id>
                </artifact>
                <artifact>
                  <id>org.ops4j.peaberry.extensions:peaberry.eclipse:1.3</id>
                </artifact>

                <!-- Jasper -->
                <artifact>
                  <id>jasperreports:jasperreports:3.5.3</id>
                </artifact>

                <!-- Persistencia -->
                <artifact>
                  <id>org.eclipse.persistence:org.eclipse.persistence.jpa:2.5.0</id>
                </artifact>
                <artifact>
                  <id>org.eclipse.persistence:org.eclipse.persistence.oracleddlparser:2.5.0</id>
                </artifact>
                <artifact>
                  <id>aopalliance:aopalliance:1.0</id>
                </artifact>
                <artifact>
                  <id>javax.validation:validation-api:1.1.0.Final</id>
                </artifact>
                <artifact>
                  <id>javax.transaction:jta:1.1</id>
                </artifact>

                <!-- Mail -->
                <artifact>
                  <id>javax.mail:mail:1.4.7</id>
                </artifact>
                <artifact>
                  <id>javax.mail:mailapi:1.4.3</id>
                </artifact>

                <!-- Joda time -->
                <artifact>
                  <id>joda-time:joda-time:2.2</id>
                </artifact>

                <!-- Log -->
                <artifact>
                  <id>org.slf4j:slf4j-api:1.7.5</id>
                </artifact>
                <artifact>
                  <id>org.slf4j:slf4j-log4j12:1.7.5</id>
                </artifact>

                <!-- WebServices -->
                <artifact>
                  <id>wsdl4j:wsdl4j:1.6.3</id>
                </artifact>
                <artifact>
                  <id>javax.xml.soap:saaj-api:1.3.5</id>
                </artifact>
                <artifact>
                  <id>javax.xml.ws:jaxws-api:2.2.11</id>
                </artifact>

                <!-- Teste -->
                <artifact>
                  <id>junit:junit:4.11</id>
                </artifact>

                <!-- Messages -->
                <!-- <artifact><id>javax.jms:jms:1.1</id></artifact> -->
                <artifact>
                  <id>jca:jca:1.5</id>
                </artifact>

              </artifacts>
            </configuration>

          </execution>
        </executions>
      </plugin>

      <plugin>
        <groupId>org.mortbay.jetty</groupId>
        <artifactId>jetty-maven-plugin</artifactId>
        <version>8.1.5.v20120716</version>
        <configuration>
          <scanIntervalSeconds>10</scanIntervalSeconds>
          <webAppSourceDirectory>${basedir}/repository/</webAppSourceDirectory>
          <webApp>
            <contextPath>/site</contextPath>
          </webApp>
        </configuration>
      </plugin>
    </plugins>
  </build>

  <pluginRepositories>
    <pluginRepository>
      <id>reficio</id>
      <url>http://repo.reficio.org/maven/</url>
    </pluginRepository>
  </pluginRepositories>
</project>