SHELL = /bin/sh

ifneq (,$(wildcard .bundle-env))
include .bundle-env
endif

ifeq (root,$(shell whoami))
check-root = @true
else
check-root = $(error this target requires root)
endif

ifeq (dom0,$(shell hostname))
check-dom0 = @true
check-domu = $(error this target must be run in the guest qube)
else
check-dom0 = $(error this target must be run in dom0)
check-domu = @true
endif

BUNDLEOUT := .bundles/dom0.bundle
BUNDLEIN := .bundles/domu.bundle

clean-workdir = git init -q -b $* && git diff --quiet && git diff --cached --quiet || (echo 'dirty tree; check git status' && false)

create-bundle = git show-ref --verify --quiet refs/remotes/$(1)/$* \
	&& git bundle create $(BUNDLEOUT) $(1)/$*..$* \
	|| git bundle create $(BUNDLEOUT) $*

.PHONY: pull pull/%
pull: pull/$(shell git branch --show-current)
pull/%:
	echo "check dom0"
	$(check-dom0)
	echo "clean workdir"
	$(clean-workdir)
	
	echo "creating bundle"
	qvm-run -p $(GUEST) "cd $(GUEST_REPO) && $(call create-bundle,dom0)" </dev/null

	qvm-run -p $(GUEST) "cat $(GUEST_REPO)/$(BUNDLEIN)" </dev/null >$(BUNDLEIN)

	git remote add $(GUEST) $(BUNDLEIN) || true
	
	git pull $(GUEST) $*:$*
		
	qvm-run -p $(GUEST) "cd $(GUEST_REPO) && git update-ref refs/remotes/dom0/$* $*" </dev/null

	@echo "updated branch $* from $(GUEST)"

apply:
	echo "Applying salt states"
	pushd ./guardian
	sudo qubesctl top.enable guardian
	sudo qubesctl --show-output --all state.apply
	popd