test(packer): add makefile to build packer images.

tests/Makefile

@@ -0,0 +1,30 @@
+#!/usr/bin/make -f
+# apparmor.d - Full set of apparmor profiles
+# Copyright (C) 2023 Alexandre Pujol <alexandre@pujol.io>
+# SPDX-License-Identifier: GPL-2.0-only
+
+# Usage:
+#   make archlinux flavor=gnome
+#   vagrant up archlinux-gnome
+#   vagrant ssh archlinux-gnome
+
+# Build variables
+flavor ?= 
+disk ?= 10G
+
+VERSION := 0.$(shell git rev-list --count HEAD)-1
+PACKERS = $(notdir $(patsubst %.pkr.hcl,%,$(wildcard packer/*.pkr.hcl)))
+
+.PHONY: ${PACKERS} lint
+
+$(PACKERS):
+	@for name in ${@}; do \
+		make --directory=../ package dist=$${name}; \
+		packer build -force -var version=${VERSION} \
+			-var disk_size=${disk} -var flavor="${flavor}" \
+			-only=main.qemu.$${name}-${flavor} packer/; \
+	done;
+
+lint:
+	@packer fmt packer/
+	@packer validate packer/