[libvirt PATCH v3 0/6] ci: helper: Rewrite image listing in Python and add stale Docker image checker

[Erik Skultety]

since v2:
    - dropped original patch 1 renaming ci-help to help in Makefile
    - changed the --quiet cmdline option to be tied to the refresh cmd only
    - urrlib imports fixed
    - improved on Python type hinting
    - improved util functions docstrings
    - replaced all tabs in formatted strings with 4 spaces
    - moved the list_stale_images method to util as requested
    - renamed variables in list_stale_images so that it's more clear at first
      glance what they actually hold
    - added a hint on where GitLab personal tokens should be generated
    - added a patch converting private method naming to reflect the common
      Python practice (I did it in a separate patch so that if this is not
      accepted I only need to ditch a single patch with no further changes)

v1: https://listman.redhat.com/archives/libvir-list/2021-February/msg00641.ht=
ml
v2: https://listman.redhat.com/archives/libvir-list/2021-March/msg00789.html

EXAMPLE OUTPUT OF THE REGISTRY CHECKER:

The following images can be purged from the registry:

    ci-debian-9: (ID: 1154661)
    ci-debian-9-cross-aarch64: (ID: 1154667)
    ci-debian-9-cross-mipsel: (ID: 1154669)
    ci-debian-9-cross-armv7l: (ID: 1154671)
    ci-debian-9-cross-armv6l: (ID: 1154676)
    ci-debian-9-cross-mips: (ID: 1154678)
    ci-debian-9-cross-ppc64le: (ID: 1154682)
    ci-debian-9-cross-s390x: (ID: 1154683)
    ci-debian-9-cross-mips64el: (ID: 1154686)
    ci-fedora-31: (ID: 1154687)
    ci-opensuse-151: (ID: 1154724)

You can remove the above images over the API with the following code snippet:

    $ for image_id in 1154661 1154667 1154669 1154671 1154676 1154678 1154682=
 \
          1154683 1154686 1154687 1154724; do \
          curl --request DELETE --header "PRIVATE-TOKEN: <access_token>" \
          https://gitlab.com/api/v4/projects/libvirt%2Flibvirt/registry/repos=
itories/$image_id \
      done

You can generate a personal access token here:
    https://gitlab.com/-/profile/personal_access_tokens

Erik Skultety (6):
  ci: helper: Use the ArgumentDefaultsHelpFormatter help formatter
  ci: helper: Introduce --quiet
  ci: Introduce a util module
  ci: helper: Rewrite image listing to Python
  ci: util: Add a registry checker for stale images
  ci: helper: Convert private methods to Python common naming practice

 ci/Makefile       |  12 ----
 ci/helper         | 162 ++++++++++++++++++++++++++++++++++++----------
 ci/list-images.sh |  14 ----
 ci/util.py        |  92 ++++++++++++++++++++++++++
 4 files changed, 219 insertions(+), 61 deletions(-)
 delete mode 100644 ci/list-images.sh
 create mode 100644 ci/util.py

--=20
2.29.2