Bug 1873483

mac:operator-registry jianzhang$ ./bin/opm  version
Version: version.Version{OpmVersion:"v1.6.1-249-gcde92c13", GitCommit:"cde92c13", BuildDate:"2020-08-31T02:14:12Z", GoOs:"darwin", GoArch:"amd64"}

mac:operator-registry jianzhang$ ./bin/opm index deprecatetruncate -h
Deprecate and truncate operator bundles from an index.

 Deprecated bundles will no longer be installable. Bundles that are replaced by deprecated bundles will be removed enirely from the index.

 For example:

  Given the update graph in quay.io/my/index:v1
  1.4.0 -- replaces -> 1.3.0 -- replaces -> 1.2.0 -- replaces -> 1.1.0
  
  Applying the command:
  opm index deprecatetruncate --bundles "quay.io/my/bundle:1.3.0" --from-index "quay.io/my/index:v1" --tag "quay.io/my/index:v2"
  
  Produces the following update graph in quay.io/my/index:v2
  1.4.0 -- replaces -> 1.3.0 [deprecated]
  
 Deprecating a bundle that removes the default channel is not allowed. Changing the default channel prior to deprecation is possible by publishing a new bundle to the index.

Usage:
  opm index deprecatetruncate [flags]

Flags:
  -i, --binary-image opm        container image for on-image opm command
  -u, --build-tool string       tool to build container images. One of: [docker, podman]. Defaults to podman. Overrides part of container-tool.
  -b, --bundles strings         comma separated list of bundles to add
  -c, --container-tool string   tool to interact with container images (save, build, etc.). One of: [docker, podman]
  -f, --from-index string       previous index to add to
      --generate                if enabled, just creates the dockerfile and saves it to local disk
  -h, --help                    help for deprecatetruncate
  -d, --out-dockerfile string   if generating the dockerfile, this flag is used to (optionally) specify a dockerfile name
      --permissive              allow registry load errors
  -p, --pull-tool string        tool to pull container images. One of: [none, docker, podman]. Defaults to none. Overrides part of container-tool.
  -t, --tag string              custom tag for container image being built

Global Flags:
      --skip-tls   skip TLS certificate verification for container image registries while pulling bundles or index

It looks good, but, as the end user, I couldn't find this "deprecatetruncate" subcommand in the output of the `opm index --help`.
mac:operator-registry jianzhang$ ./bin/opm index --help
generate operator index container images from preexisting operator bundles

Usage:
  opm index [command]

Available Commands:
  add               Add operator bundles to an index.
  export            Export an operator from an index into the appregistry format
  prune             prune an index of all but specified packages
  prune-stranded    prune an index of stranded bundles
  rm                delete an entire operator from an index

Flags:
  -h, --help   help for index

Global Flags:
      --skip-tls   skip TLS certificate verification for container image registries while pulling bundles or index

I guess it's time to show the "deprecatetruncate" subcommand. Create a bug 1873916 for this issue.
For this bug, LGTM, verify it.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (OpenShift Container Platform 4.6 GA Images), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2020:4196