.PHONY: all

all: guix-installer-vm.img

# Generate default key. Can be changed by replacing id_ed25519.pub.
id_ed25519.pub:
	printf "ssh-ed25519 %s %s" \
	'AAAAC3NzaC1lZDI1NTE5AAAAIH2feuEj4asx0ImCG+cuiPv2WdKF6vMI+cJtZyG9cwUQ' \
	'gnutoo@primary_laptop' \
	> $@

# Generate default key. Can be changed by replacing signing-key.pub.
signing-key.pub:
	printf '(public-key (ecc (curve Ed25519) (q #%s#)))\n' \
	'3A7E1F41E2D5784CFCABB39CB73F99E727D4A5C1ECA79D873587D63D093CC4B5' \
	>$@

# We want to only update the image when guix commit changes. The trick
# to make that work is to only create or update a file when the revision
# changes.
guix-commit.txt: Makefile
	if [ ! -f $@ ] ; then \
		guix describe | grep '^    commit:' | awk '{print $$2}' > $@ ; \
	elif [ "$(cat $@)" != \
	       "$(guix describe | \
			grep '^    commit:' | awk '{print $$2}')" ] ; then \
		guix describe | grep '^    commit:' | awk '{print $$2}' > $@ ; \
	fi

TARBALL_SOURCE = \
	first-boot.sh \
	guix-commit.txt \
	guix-installer-vm-system.scm \
	id_ed25519.pub \
	Makefile \
	signing-key.pub

guix-installer-vm.tar: $(TARBALL_SOURCE)
	tar --exclude "id_ed25519" -cf $@ $(TARBALL_SOURCE)

guix-installer-vm.tar.xz: guix-installer-vm.tar
	xz -f -9e --verbose $<

guix-installer-vm.tar.xz.b64: guix-installer-vm.tar.xz
	base64 $< > $@

IMAGE_SOURCE = \
	$(TARBALL_SOURCE) \
	guix-installer-vm.tar.xz

guix-installer-vm.img: $(IMAGE_SOURCE)
	install \
		`guix system image \
			--image-type=mbr-raw \
			--image-size=4G guix-installer-vm-system.scm` \
		$@