Possible bug: tags in --keep-tags are removed

[akrasnov-drv]

Hi,
Have an issue keeping old tags that are specified in --keep-tags
Here is my command:
docker run --rm anoxis/registry-cli -r http://registry:5000 --keep-by-hours 7300 --dry-run -i ubuntu --keep-tags 18.04 16.04
and here what I get

Will delete tag: 16.04 timestamp: 2017-11-04T09:45:35.219223981Z
Will delete tag: 18.04-2019-08-27 timestamp: 2019-08-27T13:07:39.539391663Z

I'd expect to keep both "newer" images and also 16.04 and 18.04 tags.
Please advise what is wrong in my command, otherwise please fix.
I believe all keep options should have priority over all delete options.

[akrasnov-drv]

Yes, it's definitely a bug. I've tested it without "extra" options:
docker run --rm anoxis/registry-cli -r http://registry:5000 -d --dry-run --keep-tags 16.04
and still

Getting digest for tag 16.04
Keep digest sha256:88a0478aaf41fa07dfbd788f12dc160b13a4cadf041714828e097ab503e8b037 for tag 16.04
  tag: 16.04
  deleting tag 16.04

it maybe keeps blob but removes tag.

[akrasnov-drv]

Looks like the bug is addressed in #85 but not merged since Dec, 2019