heads/modules/u-root

#
# u-root go runtime
#
# This is not a normal Heads module, since it builds all of its
# own dependencies.
#

u-root_url := github.com/u-root/u-root
u-root_output := $(build)/$(BOARD)/u-root.cpio
UROOT_CMDS ?=

export GOPATH=$(build)/go
src_cmds := $(foreach cmd,$(UROOT_CMDS),github.com/u-root/u-root/cmds/$(cmd))

$(GOPATH):
	$(call do,GO GET,$(u-root_url),\
		go get $(u-root_url) \
	)

clean:
	rm -f $(build)/$(BOARD)/u-root.cpio

$(u-root_output): $(GOPATH) clean
ifeq ($(shell test -e boards/$(BOARD)/uinit.go && echo -n yes),yes)
ifeq ($(shell (test -d $(GOPATH)/src/github.com/u-root/u-root/cmds/uinit || echo -n yes)),yes)
	mkdir $(GOPATH)/src/github.com/u-root/u-root/cmds/uinit
endif
	cp boards/$(BOARD)/uinit.go $(GOPATH)/src/github.com/u-root/u-root/cmds/uinit
endif
	$(call do,U-ROOT,$@,\
		$(GOPATH)/bin/u-root \
			-build=bb \
			-format=cpio \
			-o $@  \
			$(src_cmds)\
	)

# Override the initrd inputs and add in the kernel modules
initrd-$(CONFIG_UROOT) += $(u-root_output)


# If we are building for u-root, disable the default CONFIG_HEADS
ifeq "$(CONFIG_UROOT)" "y"
CONFIG_HEADS=n
endif