ROX-30898: Assign index image tag differently

[msugakov]

See the related ticket.

Validation

See my comments below.

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[msugakov]

Looks like it executed as expected.
Task logs

scanner-slim-on-push-76mcx-apply-index-image-tags
place-scripts :-
2025/09/16 00:17:00 Decoded script /tekton/scripts/script-0-9ps6h
2025/09/16 00:17:00 Decoded script /tekton/scripts/script-1-76tqf
prepare :-
2025/09/16 00:16:59 Entrypoint initialization
step-apply-additional-tags-from-parameter :-
Applying tag konflux-971fc478725041993ab947bc5b039f305079117a
Getting image list signatures
Copying 0 images generated from 4 images in list
Writing manifest list to image destination
Storing list signatures
step-apply-additional-tags-from-image-labe :-
No additional tags specified in the image labels

$ skopeo inspect --format '{{.Digest}}' --no-tags docker://quay.io/rhacs-eng/release-scanner-slim:2.37.x-82-g971fc47872-fast
sha256:49b0bdf62fcbe82272239554bdc85ee04828568a7fa9b59ed06a0cea1893c698
$ skopeo inspect --format '{{.Digest}}' --no-tags docker://quay.io/rhacs-eng/release-scanner-slim:konflux-971fc478725041993ab947bc5b039f305079117a
sha256:49b0bdf62fcbe82272239554bdc85ee04828568a7fa9b59ed06a0cea1893c698

[msugakov]

Now, the interesting thing is how the init task would behave if the image already exists. It shouldn't even call to skopeo but let's make it run to be sure.
https://github.com/konflux-ci/build-definitions/blob/8ddc2b52768ed7b8c0794b59ad5b3d944354b15e/task/init/0.2/init.yaml#L52

[msugakov]

/retest scanner-slim-on-push

[msugakov]

This is what succeeding init told us on re-run

step-init
Build Initialize: quay.io/rhacs-eng/release-scanner-slim:konflux-971fc478725041993ab947bc5b039f305079117a

Determine if Image Already Exists

[msugakov]

/retest

[msugakov]

Builds feel fine. Merging.