settings-4-travis.xml

<settings>
    <servers>
        <server>
            <id>ossrh</id>
            <username>${env.OSSRH_USERNAME}</username>
            <password>${env.OSSRH_PASSWORD}</password>
        </server>
    </servers>
    <profiles>
        <profile>
            <id>travis-profile</id>
            <!--
            It seems that the settings.xml that is used by default when building using Travis CI includes the codehaus
            repository. This repository does not exist any more so this can cause builds to fail during dependency resolution.
            By configuring this repository, we seem to be able to override this repo, setting the enabled properties to false.
            -->
            <repositories>
                <repository>
                    <releases>
                        <enabled>false</enabled>
                        <updatePolicy>always</updatePolicy>
                        <checksumPolicy>warn</checksumPolicy>
                    </releases>
                    <snapshots>
                        <enabled>false</enabled>
                        <updatePolicy>never</updatePolicy>
                        <checksumPolicy>fail</checksumPolicy>
                    </snapshots>
                    <id>codehaus-snapshots</id>
                    <name>Codehaus (snapshots)</name>
                    <url>https://nexus.codehaus.org/snapshots/</url>
                </repository>
            </repositories>
        </profile>
    </profiles>
    <activeProfiles>
        <activeProfile>travis-profile</activeProfile>
    </activeProfiles>
</settings>