OUTPUT	?= $(USER)/bip
CTR	?= podman
IMAGE	?= fedora
TAG	?= 29

.PHONY: image
image: .digest
	$(CTR) build \
		--build-arg "IMAGE=$(IMAGE)" \
		--build-arg "IMAGE_TAG=$(TAG)" \
		--build-arg "DIGEST=$(shell cat .digest)" \
		-t $(OUTPUT) \
		.

pull:
	$(CTR) pull $(IMAGE):$(TAG)

.digest: pull
	$(CTR) images --digests --format "{{.Digest}}" $(IMAGE):$(TAG) | head -1 | tee $@