As part of the transition from VMware, the current perforce instance is being migrated to the new Zimbra datacenter. At this time, the old public perforce instance (codes.zimbra.com) is being retired. In its place, a new instance will be brought online (git.zimbra.com). It will allow access to Zimbra's Open Source code via git!
It is estimated that the downtime for the migration will be approximately one week. Once the new instance is up, the Zimbra wiki for accessing the code will be updated to reflect the new procedures. The migration will dramatically ease building Zimbra from the public instance as it will allow external developers to pull updates individually rather than having to continually fetch the entire repository.
Apologies for any inconvenience during the migrations.