{'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: 120,484 (reg: 99,985, dir: 20,499)
Number of created files: 0
Number of deleted files: 0
Number of regular files transferred: 0
Total file size: 90.45M bytes
Total transferred file size: 0 bytes
Literal data: 0 bytes
Matched data: 0 bytes
File list size: 1.31M
File list generation time: 0.001 seconds
File list transfer time: 0.000 seconds
Total bytes sent: 20.87K
Total bytes received: 3.55M

sent 20.87K bytes  received 3.55M bytes  2.38M bytes/sec
total size is 90.45M  speedup is 25.35
*** 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