fsmgr := $(shell which fsmgr)

ifeq ($(fsmgr),)
$(error "no fsmgr")
endif

sudo := $(shell [ "$$(id -u)" = 0 ] || echo sudo)

rootfs ?= samizdat.btrfs
patchfs ?= samizdat.patch.btrfs

.PHONY: all rootfs patchfs
all: rootfs $(ifneq $(patchfs),,patchfs)

rootfs $(rootfs):
	$(sudo) $(fsmgr) build $(rootfs)

patchfs $(patchfs):
	$(sudo) REWRITE_SOURCES_LIST=y $(fsmgr) build $(patchfs)