catalog: List repositories with no unique layers #3173
Merged
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A repository need not contain any unique layers, if its images use only layers mounted from other repositories. But, the catalog endpoint was looking for the _layers directory to indicate that a directory was a repository.
Use the _manifests directory as the marker instead, since any repository with revisions will contain a _manifests directory.
Fixes #3172
Signed-off-by: Adam Wolfe Gordon awg@digitalocean.com