Snippet of Maven POM file that creates a file named REV in your project, before packaging. The contents of the file are the following env variables: SVN_REVISION BUILD_NUMBER BUILD_ID BUILD_TAG

pom.xml

<project>
  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-antrun-plugin</artifactId>
        <version>1.7</version>
        <executions>
          <execution>
            <phase>prepare-package</phase>
            <configuration>
              <target>
                <echo file="${project.build.directory}/${project.build.finalName}/rev">Svn-Revision: ${env.SVN_REVISION}${line.separator}Build-Number: ${env.BUILD_NUMBER}${line.separator}Build-Id: ${env.BUILD_ID}${line.separator}Build-Tag: ${env.BUILD_TAG}</echo>
              </target>
            </configuration>
            <goals><goal>run</goal></goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>
</project>