{'description': {'en': 'Gentoo overlay of R packages'},
 'homepage': 'https://cgit.gentoo.org/proj/R_overlay.git/',
 'name': 'R_Overlay',
 'owner': [{'email': 'heroxbd@gentoo.org',
            'name': 'Benda Xu',
            'type': 'person'}],
 'quality': 'experimental',
 'source': [{'type': 'rsync',
             'uri': 'rsync://roverlay.dev.gentoo.org/roverlay'}],
 'status': 'official'}
pkgcore 0.12.16

$ pmaint --config /var/lib/repo-mirror-ci/data-sync/etc/portage sync R_Overlay
ERROR:pkgcore:Cannot write cache for /var/cache/pkgcore/plugincache: [Errno 13] Permission denied: '/var/cache/pkgcore/.update.plugincache'. Try running pplugincache.
*** syncing R_Overlay

Number of files: 119,362 (reg: 98,931, dir: 20,431)
Number of created files: 0
Number of deleted files: 0
Number of regular files transferred: 0
Total file size: 89.15M bytes
Total transferred file size: 0 bytes
Literal data: 0 bytes
Matched data: 0 bytes
File list size: 1.29M
File list generation time: 0.001 seconds
File list transfer time: 0.000 seconds
Total bytes sent: 20.80K
Total bytes received: 3.51M

sent 20.80K bytes  received 3.51M bytes  1.41M bytes/sec
total size is 89.15M  speedup is 25.22
*** synced R_Overlay
 * Sync succeeded
$ stat --format=%y .
$ pmaint --config /var/lib/repo-mirror-ci/data/etc/portage regen --use-local-desc --pkg-desc-index -t 32 R_Overlay
ERROR:pkgcore:Cannot write cache for /var/cache/pkgcore/plugincache: [Errno 13] Permission denied: '/var/cache/pkgcore/.update.plugincache'. Try running pplugincache.
 * Cache regenerated successfully