Makefile.instance

define instance_arg_present
	ifeq ($(findstring instance=, $(strip $(filter-out --%,$(MAKEFLAGS)))), instance=)
		showmenu := false
		newinstance := ${instance}
	else
		showmenu := true
		newinstance := ""
	endif
endef


.PHONY: instance # Create a duplicate instance with its own .env_{DOCKER_CONTEXT}_{INSTANCE} config file
instance: check-in-subshell
	$(eval $(instance_arg_present))
	@unset INSTANCE; unset instance; MAKE_INSTANCE_SOURCE_RCFILE=${MAKE_INSTANCE_SOURCE_RCFILE} DOCKER_CONTEXT=${DOCKER_CONTEXT} ENV_FILE=${ENV_FILE} showmenu=${showmenu} newinstance=${newinstance} call=instance ${BIN}/instance

.PHONY: switch # Switch to the given INSTANCE and enter a new subshell for it
switch: check-in-subshell
	$(eval $(instance_arg_present))
	@unset INSTANCE; unset instance; MAKE_INSTANCE_SOURCE_RCFILE=${MAKE_INSTANCE_SOURCE_RCFILE} DOCKER_CONTEXT=${DOCKER_CONTEXT} ENV_FILE=${ENV_FILE} showmenu=${showmenu} newinstance=${newinstance} call=switch ${BIN}/instance