Build a file-based catalog

Signed-off-by: Carlo Lobrano <c.lobrano@gmail.com>

Makefile

@@ -352,12 +352,31 @@ ifneq ($(origin CATALOG_BASE_IMG), undefined)
 FROM_INDEX_OPT := --from-index $(CATALOG_BASE_IMG)
 endif
 
-# Build a catalog image by adding bundle images to an empty catalog using the operator package manager tool, 'opm'.
-# This recipe invokes 'opm' in 'semver' bundle add mode. For more information on add modes, see:
-# https://github.com/operator-framework/community-operators/blob/7f1438c/docs/packaging-operator.md#updating-your-existing-operator
+# Build a file-based catalog image
+# https://docs.openshift.com/container-platform/4.14/operators/admin/olm-managing-custom-catalogs.html#olm-managing-custom-catalogs-fb
 .PHONY: catalog-build
 catalog-build: opm ## Build a catalog image.
-	$(OPM) index add --container-tool docker --mode semver --tag $(CATALOG_IMG) --bundles $(BUNDLE_IMGS) $(FROM_INDEX_OPT)
+	@mkdir -p catalog_dir
+	$(OPM) generate dockerfile catalog_dir
+	$(OPM) init ${OPERATOR_NAME} \
+		--default-channel=${CHANNELS} \
+		--description=./README.md \
+		--icon=./config/assets/medik8s_blue_icon.png \
+		--output yaml \
+		> catalog_dir/index.yaml
+	$(OPM) render ${BUNDLE_IMG} --output yaml >> catalog_dir/index.yaml
+	$(MAKE) add_channel_entry_for_the_bundle
+	$(OPM) validate catalog_dir
+	docker build . -f catalog_dir.Dockerfile -t ${CATALOG_IMG} && \
+		rm -r catalog_dir catalog_dir.Dockerfile
+
+add_channel_entry_for_the_bundle:
+	@echo "---" >> catalog_dir/index.yaml
+	@echo "schema: olm.channel" >> catalog_dir/index.yaml
+	@echo "package: ${OPERATOR_NAME}" >> catalog_dir/index.yaml
+	@echo "name: ${CHANNELS}" >> catalog_dir/index.yaml
+	@echo "entries:" >> catalog_dir/index.yaml
+	@echo "  - name: ${OPERATOR_NAME}.v${VERSION}" >> catalog_dir/index.yaml
 
 .PHONY: catalog-push
 catalog-push: ## Push a catalog image.