automate awx-operator publishing on operatorhub

Makefile

@@ -4,6 +4,7 @@
 # - use the VERSION as arg of the bundle target (e.g make bundle VERSION=0.0.2)
 # - use environment variables to overwrite this value (e.g export VERSION=0.0.2)
 VERSION ?= $(shell git describe --tags)
+PREV_VERSION ?= $(git describe --abbrev=0 --tags $(git rev-list --tags --skip=1 --max-count=1))
 
 CONTAINER_CMD ?= docker
 
@@ -88,6 +89,10 @@ all: docker-build
 help: ## Display this help.
 	@awk 'BEGIN {FS = ":.*##"; printf "\nUsage:\n  make \033[36m<target>\033[0m\n"} /^[a-zA-Z_0-9-]+:.*?##/ { printf "  \033[36m%-15s\033[0m %s\n", $$1, $$2 } /^##@/ { printf "\n\033[1m%s\033[0m\n", substr($$0, 5) } ' $(MAKEFILE_LIST)
 
+.PHONY: print-%
+print-%: ## Print any variable from the Makefile. Use as `make print-VARIABLE`
+	@echo $($*)
+
 ##@ Build
 
 .PHONY: run