#  $HeadURL$ $LastChangedRevision$

ifndef METHOD_GENERATOR_MK
METHOD_GENERATOR_MK = 1

#  Variables (needed by method-*.mk in pass #1 and the file-*.mk in pass #0)
MAKEFILE_GENERATOR_RECIPES = $(PCMS_STATE_PREFIX)/makefiles/generator-recipes.mk
MAKEFILE_GENERATOR_FILES = $(PCMS_STATE_PREFIX)/makefiles/generator-files.mk

#  Generate all recipes and recipe list (but they not be used by pass #0)
ifeq ($(PCMS_PASS_NUM),3)

all.facility: all.generator

#  Check symbols we'll use in recipes below.
$(eval $(call check_var_set,GENERATORSPATH))

all.generator: force-execution-each-time
	mkdir -p $(dir $(MAKEFILE_GENERATOR_RECIPES))
	set -e; \
	for X in $(patsubst %.generator,%,$(filter %.generator,$^)); do \
            eval "DECODED_X=$$(encode --decode $$X)"; \
	    echo "#  $$DECODED_X"; \
	    FOUND=false; \
	    for D in $(subst :, ,$(GENERATORSPATH)); do \
	        [ ! -f "$$D/$${DECODED_X#/}" ] || { FOUND=true; break; }; \
	    done; \
            if $$FOUND; then \
                echo "$$X.generator:"; \
                echo "	$$D$$DECODED_X"; \
	    else \
	    	echo "$$X.generator:"; \
		echo "	msg --progname=\$$(PROGNAME) --debug=\$$(VERBOSELEVEL) error \"$$X: none of the possible sources of this generator exist\""; \
	    fi; \
	    echo; \
	done > $(MAKEFILE_GENERATOR_RECIPES)
	#
	mkdir -p $(dir $(MAKEFILE_GENERATOR_FILES))
	echo "GENERATOR_FILES = $(filter %.generator,$^)" > $(MAKEFILE_GENERATOR_FILES)
	
#  Stop descent
%.generator: ;

#  method-*.mk does nothing in pass #0; see the associated file-*mk.
else ifeq ($(PCMS_PASS_NUM),2)

#  But, since the associated file-*.mk doesn't know what the recipe targets
#  depend on, tell pass #0 to acquaint itself with how to make *those* here.
#  (none)

#  But, as a courtesy, we can load the recipes and recipe list ...
include $(MAKEFILE_GENERATOR_RECIPES)
include $(MAKEFILE_GENERATOR_FILES)

all.facility: $(GENERATOR_FILES)

else ifeq ($(PCMS_PASS_NUM),1)

include $(MAKEFILE_GENERATOR_FILES)
all.copy: $(patsubst %.generator, %.copy, $(GENERATOR_FILES))

else ifeq ($(PCMS_PASS_NUM),0)

#  ... but it's up to the associated file-*.mk to demand that
#  $(GENERATOR_FILES) be built.

endif		#  PCMS_PASS_NUM
endif		#  METHOD_GENERATOR_MK