travis-gpg-mvn-keys.sh

settings.xml

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
                      http://maven.apache.org/xsd/settings-1.0.0.xsd">
    <localRepository/>
    <interactiveMode/>
    <usePluginRegistry/>
    <offline/>
    <pluginGroups/>
    <servers>
        <server>
            <id>ossrh</id>
            <username>${env.OSSRH_USERNAME}</username>
            <password>${env.OSSRH_PASSWORD}</password>
        </server>
    </servers>
    <mirrors/>
    <proxies/>
    <profiles>
        <profile>
            <id>ossrh</id>
            <activation>
                <activeByDefault>true</activeByDefault>
            </activation>
            <properties>
                <gpg.keyname>KEYID</gpg.keyname>
                <gpg.secretKeyring>~/build/${env.TRAVIS_REPO_SLUG}/gpg.key</gpg.secretKeyring>
                <gpg.publicKeyring>~/build/${env.TRAVIS_REPO_SLUG}/gpg.pub</gpg.publicKeyring>
                <gpg.passphrase>${env.GPG_PASSPHRASE}</gpg.passphrase>
            </properties>
        </profile>
    </profiles>
    <activeProfiles/>
</settings>

travis-gpg-mvn-keys.sh

gpg --export-secret-key KEYID > gpg.key
gpg --export KEYID > gpg.pub
tar zcvf gpg.tar.gz gpg.pub gpg.key

travis encrypt-file gpg.tar.gz --add

travis encrypt OSSRH_USERNAME=TFaga --add
travis encrypt OSSRH_PASSWORD=pass --add

# tar zxvf gpg.tar.gz

# OSSRH_PASSWORD=pass
# OSSRH_USERNAME=TFaga
# GPG_PASSPHRASE=pass