Snapshots get purged from all repositories, daily or so.


ALL (and only) SNAPSHOTS
https://oss.sonatype.org/content/repositories/snapshots

RELEASE UPLOADS Only!
https://oss.sonatype.org/service/local/staging/deploy/maven2

REAL SYNC-TO-MAVEN SITE  (no snapshots)  Gets releases upon RELEASE
https://oss.sonatype.org/content/repositories/releases


Repository Groups.  They both get snapshots quickly.
Remember to SHIFT-RELOAD web browser!
https://oss.sonatype.org/content/groups/staging  <- gets releases upon CLOSE
                                                    (removed upon DROP)
https://oss.sonatype.org/content/groups/public  <-  gets releases upon RELEASE


Sonatype Usage guide is messed up w.r.t. Git repositorites.
The scm.url should be browse-able, so use Github home page, even if it is same
as the project URL.
Example for scm.connection has wrong format.  Use the public R/O git URL.


GRADLE
    SNAPSHOTS:
repositories { maven { url 'https://oss.sonatype.org/content/groups/staging' } }

(Switch "staging" to "public" to get post-release releases)