# -*- makefile-gmake -*-
# $Id$

### Requirements handling (at the subtree level)

# reqs = $(patsubst %,$(status_dir)/%.enabled,$(sort $(REQUIRES)))
reqs = $(REQUIRES:%=$(status_dir)/%.enabled)
requirements: $(reqs)

ifdef base_req_needers
  req_needers = $(base_req_needers:%=%.needs-reqs)
  missing_reqs = $(filter-out $(wildcard $(reqs)),$(reqs))
  ifeq "" "$(filter %_r %_p,$(MAKECMDGOALS))"
    mark_as_disabled=mark-as-disabled
  else
    ifneq "" "$(filter %_p,$(MAKECMDGOALS))"
      mark_as_disabled=mark-as-disabled_p
    else
      mark_as_disabled=mark-as-disabled_r
    endif
  endif
  ifeq "$(missing_reqs)" ""
    $(req_needers): %.needs-reqs: %.real ;
  else
    $(req_needers): %.needs-reqs:
	@/bin/echo 'NOTE: Skipping project $(notdir $(CURDIR)) due to unmet requirements:'
	@$(foreach r,$(missing_reqs),/bin/echo $(r:$(status_dir)/%.enabled=%);)
	@$(MAKE) $(MFLAGS) $(mark_as_disabled) \
	    INHERITED_REQUIREMENTS='$(INHERITED_REQUIREMENTS) $(REQUIRES)'
  endif
  .PHONY: $(base_req_needers) $(req_needers)
endif