pom.xml

<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>uk.ac.ox.oucs.vle</groupId>
  <artifactId>sakai-run</artifactId>
  <packaging>pom</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>Sakai Run</name>
  <url>http://maven.apache.org</url>
  <repositories>
    <repository>
      <id>thirdparty</id>
      <name>Maven Repo Third Party</name>
      <layout>default</layout>
      <url>http://maven-repo.oucs.ox.ac.uk/content/repositories/thirdparty</url>
      <snapshots>
        <enabled>false</enabled>
      </snapshots>
    </repository>
  </repositories>
  <dependencies>
    <dependency>
      <groupId>apache.tomcat</groupId>
      <artifactId>tomcat</artifactId>
      <version>5.5.28</version>
      <scope>runtime</scope>
      <type>zip</type>
    </dependency>
    <dependency>
      <groupId>org.sakaiproject</groupId>
      <artifactId>pack-build</artifactId>
      <version>2.8-SNAPSHOT</version>
      <scope>runtime</scope>
      <type>zip</type>
      <classifier>tomcat-overlay</classifier>
    </dependency>
  </dependencies>
  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-dependency-plugin</artifactId>
        <executions>
          <execution>
            <id>unpack-dependencies</id>
            <phase>generate-resources</phase>
            <goals>
              <goal>unpack-dependencies</goal>
            </goals>
            <configuration>
              <outputDirectory>${project.build.directory}/tomcat</outputDirectory>
            </configuration>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-resources-plugin</artifactId>
        <executions>
          <execution>
            <id>copy-resources</id>
            <!-- here the phase you need -->
            <phase>process-resources</phase>
            <goals>
              <goal>copy-resources</goal>
            </goals>
            <configuration>
              <outputDirectory>${basedir}/target/tomcat</outputDirectory>
              <resources>          
                <resource>
                  <directory>src/main/tomcat</directory>
                  <filtering>true</filtering>
                </resource>
              </resources>
              <nonFilteredFileExtensions>
                <nonFilteredFileExtension>jar</nonFilteredFileExtension>
                <nonFilteredFileExtension>war</nonFilteredFileExtension>
              </nonFilteredFileExtensions>
            </configuration>            
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>
</project>