Add Makefile

Makefile

@@ -0,0 +1,28 @@
+PREFIX?=/usr/local
+BINDIR?=$(PREFIX)/bin
+
+# Exists in GNUMake but not in NetBSD make and others.
+RM?=rm -f
+
+.PHONY: help
+help: ## Show this help
+	@egrep -h '\s##\s' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-20s\033[0m %s\n", $$1, $$2}'
+
+.PHONY: install
+install: ## Install aptpkg
+	mkdir -m755 -p $(DESTDIR)$(BINDIR)
+	install -m755 aptpkg $(DESTDIR)$(BINDIR)/aptpkg
+
+.PHONY: test
+test: ## Run shellcheck tests
+	shellcheck aptpkg
+
+RMDIR_IF_EMPTY:=sh -c '\
+if test -d $$0 && ! ls -1qA $$0 | grep -q . ; then \
+	rmdir $$0; \
+fi'
+
+.PHONY: uninstall
+uninstall: ## Uninstall aptpkg
+	$(RM) $(DESTDIR)$(BINDIR)/aptpkg
+	${RMDIR_IF_EMPTY} $(DESTDIR)$(BINDIR)