src/main/assembly/distsrc.xml

<?xml version="1.0" encoding="UTF-8"?>
<assembly xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/xsd/assembly-1.1.1.xsd">
    <id>dist</id>
    <formats>
        <format>jar</format>
    </formats>
    <fileSets>
        <fileSet>
            <directory>.</directory>
            <includes>
                <include>pom.xml</include>
                <include>README.txt</include>
                <include>LICENSE.txt</include>
                <include>NOTICE.txt</include>
            </includes>
            <!-- TODO: this does not work: -->
            <excludes>
                <exclude>**/*.iml</exclude>
                <exclude>**/*.log</exclude>
            </excludes>
        </fileSet>
        <fileSet>
            <directory>src</directory>
            <outputDirectory>src</outputDirectory>
        </fileSet>
    </fileSets>
</assembly>