Fix canonical image ref resolution

Previously in release scripts we were using `docker inspect`
which seems to sort .RepoDigests and it makes selection of the
correct digest difficult because platform-specific digest can
appear at a different index depending on the digests in the list.

Signed-off-by: Mikalai Radchuk <[email protected]>

Author: Mikalai Radchuk

Diff for: Makefile

@@ -56,7 +56,8 @@ OPERATOR_REGISTRY_VERSION ?= $(shell go list -m github.com/operator-framework/op
 
 # Pin operator registry images to the same version as the operator registry
 export OPERATOR_REGISTRY_TAG ?= v$(OPERATOR_REGISTRY_VERSION)
-export OPERATOR_REGISTRY_IMAGE ?= quay.io/operator-framework/opm:$(OPERATOR_REGISTRY_TAG)
+export OPERATOR_REGISTRY_REPO ?= quay.io/operator-framework/opm
+export OPERATOR_REGISTRY_IMAGE ?= $(OPERATOR_REGISTRY_REPO):$(OPERATOR_REGISTRY_TAG)
 export CONFIGMAP_SERVER_IMAGE ?= quay.io/operator-framework/configmap-operator-registry:$(OPERATOR_REGISTRY_TAG)
 
 # Artifact settings #
@@ -312,8 +313,8 @@ pull-opm:
 
 .PHONY: package
 package: $(YQ) $(HELM) #HELP Package OLM for release
-package: OLM_RELEASE_IMG_REF=$(shell docker inspect --format='{{index .RepoDigests 0}}' $(IMAGE_REPO):$(RELEASE_VERSION))
-package: OPM_IMAGE_REF=$(shell docker inspect --format='{{index .RepoDigests 0}}' $(OPERATOR_REGISTRY_IMAGE))
+package: OLM_RELEASE_IMG_REF=$(IMAGE_REPO)@$(shell docker images --format='{{.Digest}}' $(IMAGE_REPO):$(RELEASE_VERSION))
+package: OPM_IMAGE_REF=$(OPERATOR_REGISTRY_REPO)@$(shell docker images --format='{{.Digest}}' $(OPERATOR_REGISTRY_IMAGE))
 package:
 ifndef TARGET
 	$(error TARGET is undefined)
@@ -323,6 +324,8 @@ ifndef RELEASE_VERSION
 endif
 	@echo "Getting operator registry image"
 	docker pull $(OPERATOR_REGISTRY_IMAGE)
+	@echo "Using OPM image $(OPM_IMAGE_REF)"
+	@echo "Using OLM image $(OLM_RELEASE_IMG_REF)"
 	$(YQ) w -i deploy/$(TARGET)/values.yaml olm.image.ref $(OLM_RELEASE_IMG_REF)
 	$(YQ) w -i deploy/$(TARGET)/values.yaml catalog.image.ref $(OLM_RELEASE_IMG_REF)
 	$(YQ) w -i deploy/$(TARGET)/values.yaml package.image.ref $(OLM_RELEASE_IMG_REF)