assemblies/src/main/resources/assemblies/src-descriptor.xml

<?xml version="1.0" encoding="UTF-8"?>
<assembly>
    <id>src</id>
    <includeBaseDirectory>false</includeBaseDirectory>
    <formats>
        <format>dir</format>
    </formats>
    <fileSets>
        <fileSet>
            <includes>
                <include>README*</include>
                <include>LICENSE*</include>
                <include>NOTICE*</include>
                <include>pom.xml</include>
            </includes>
        </fileSet>
        <fileSet>
            <directory>src</directory>
        </fileSet>
    </fileSets>
</assembly>