Deploying these artifacts to MavenCentral manually:

 mvn gpg:sign-and-deploy-file -DpomFile=lombok-ast-0.2.1.pom -Dfile=lombok-ast-0.2.1.jar -DrepositoryId=sonatype-nexus-staging -Durl=https://oss.sonatype.org/service/local/staging/deploy/maven2/ -Dsources=lombok-ast-0.2.1-sources.jar -Djavadoc=lombok-ast-0.2.1-javadoc.jar -Dgpg.keyname=???? -Dgpg.passphrase=????

'sonatype-nexus-staging' refers to the server entry in ~/.m2/settings.xml which should look something like:

<settings>
  <servers>
    <server>
      <id>sonatype-nexus-staging</id>
      <username>????</username>
      <password>????</password>
    </server>
  </servers>
</settings>


It is used to pass the login/password on https://oss.sonatype.org