another try on clean git

Makefile

@@ -1,4 +1,4 @@
-.PHONY: default build clean release
+.PHONY: default build clean release require_clean_git
 
 -include .env
 
@@ -10,16 +10,25 @@ SHELL := /bin/bash
 
 default: build
 
-guard:
-	@ if [ -z "$(git status --porcelain=v1 2>/dev/null)" ]; then echo "git not clean!"; exit 1; fi
+require_clean_git:
+	git update-index -q --ignore-submodules --refresh
+	git diff-files --quiet --ignore-submodules
+	git diff-index --cached --quiet --ignore-submodules HEAD --
+	@status=$$(git status --porcelain); \
+	if test "x$${status}" = x; then \
+		echo "No files" \
+	else \
+		echo "Untracked files" \
+		exit 1 \
+	fi
 
 build:
 	podman build --build-arg VERSION=$(VERSION) --tag ${REPO}/${IMAGENAME}:$(VERSION) .
 
-clean: guard
+clean:
 	podman image rm ${REPO}/${IMAGENAME}:$(VERSION)
 
-release: guard build
+release: require_clean_git build
 	$(eval TMP_MESSAGE := $(shell podman run --rm -it ${REPO}/${IMAGENAME}:$(VERSION) /usr/sbin/dnsmasq --version))
 	git tag -a v$(VERSION) -m "${TMP_MESSAGE}"
 	git push origin v$(VERSION)