--- /dev/null
+.DEFAULT_GOAL:=help
+
+help: ## Display this help
+ @awk 'BEGIN {FS = ":.*##"; printf "\nUsage:\n make \033[36m\033[0m\n\nTargets:\n"} /^[a-zA-Z_-]+:.*?##/ { printf " \033[36m%-10s\033[0m %s\n", $$1, $$2 }' $(MAKEFILE_LIST)
+
+allcheck: codecheck spellcheck ## Run codecheck and spellcheck
+
+codecheck: shellcheck pythoncheck ## Run shellcheck and pythoncheck
+
+.ONESHELL:
+shellcheck: ## Run shellcheck
+ @RETURN=0
+ @for shellfile in $$(ls usr_bin/* usr_sbin/* usr_share/*); do
+ @ [ "$${shellfile}" = "usr_bin/iimage" ] && continue
+ @ [ "$${shellfile}" = "usr_sbin/make_chroot_jail" ] && continue
+ @ file "$${shellfile}" | grep -q shell && (shellcheck -x "$${shellfile}" || RETURN=1)
+ @done
+ @exit $${RETURN}
+
+.ONESHELL:
+pythoncheck: ## Run pythoncheck (flakecheck, isortcheck + blackcheck)
+ @RETURN=0
+ @for pythonfile in usr_bin/* usr_sbin/* usr_share/*; do
+ @ if head -1 "$${pythonfile}" | grep -q "python"; then
+ @ flake8 --max-line-length 88 "$${pythonfile}" || RETURN=1
+ @ isort --check "$${pythonfile}" || RETURN=1
+ @ black --check "$${pythonfile}" || RETURN=1
+ @ fi
+ @done
+ @exit $${RETURN}
+
+.ONESHELL:
+flakecheck: ## Run flake8 only
+ @RETURN=0
+ @for pythonfile in usr_bin/* usr_sbin/* usr_share/*; do
+ @ if head -1 "$${pythonfile}" | grep -q "python"; then
+ @ flake8 --max-line-length 88 "$${pythonfile}" || RETURN=1
+ @ fi
+ @done
+ @exit $${RETURN}
+
+.ONESHELL:
+isortcheck: ## Run isort --check only
+ @RETURN=0
+ @for pythonfile in usr_bin/* usr_sbin/* usr_share/*; do
+ @ if head -1 "$${pythonfile}" | grep -q "python"; then
+ @ isort --check "$${pythonfile}" || RETURN=1
+ @ fi
+ @done
+ @exit $${RETURN}
+
+.ONESHELL:
+blackcheck: ## Run black --check only
+ @RETURN=0
+ @for pythonfile in usr_bin/* usr_sbin/* usr_share/*; do
+ @ if head -1 "$${pythonfile}" | grep -q "python"; then
+ @ black --check "$${pythonfile}" || RETURN=1
+ @ fi
+ @done
+ @exit $${RETURN}
+
+.ONESHELL:
+spellcheck: ## Run spellcheck
+ @OUTPUT="$$(spellintian manpages/*)"
+ @echo $$OUTPUT
+ @if [ -n "$$OUTPUT" ]; then
+ @ false
+ @fi