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LOAD_PATH=. /usr/share/emacs/site-lisp $(HOME)/.emacs.d/site-lisp
EMACS=emacs $(addprefix -L ,$(LOAD_PATH))
MODE=644

FG_BLU=\033[0;34m
FG_YEL=\033[0;33m
FG_GRE=\033[0;32m
FG_RED=\033[0;31m
CLR_RE=\033[0;00m

compile = $(EMACS) -Q -batch -eval "(byte-compile-file \"$(1)\")"
define newer =
$(shell if [ "$(1)" -nt "$(DESTDIR)/$(1)" ]; then echo "newer"; fi)
endef
define older =
$(shell if [ "$(1)" -ot "$(DESTDIR)/$(1)" ]; then echo "older"; fi)
endef

check-objects=$(addprefix check-,$(objects))
install-objects=$(addprefix install-,$(objects))
reverse-objects=$(addprefix reverse-,$(objects))
uninstall-objects=$(addprefix uninstall-,$(objects))

check-modules=$(addprefix check-,$(modules))
install-modules=$(addprefix install-,$(modules))
reverse-modules=$(addprefix reverse-,$(modules))
uninstall-modules=$(addprefix uninstall-,$(modules))

.PHONY: all install uninstall check uninstall $(modules) \
	$(install-objects) $(uninstall-objects) $(check-objects) \
	$(install-modules) $(uninstall-modules) $(check-modules) \
	$(reverse) $(reverse-objects) $(reverse-modules)
all: $(modules) $(objects)

ifeq ($(MAKEROOT),y)
check: $(check-modules) $(check-objects)
install: uninstall $(install-modules) $(install-objects) Makefile.old
reverse: $(reverse-modules) $(reverse-objects)
ifeq ($(firstword $(MAKEFILE_LIST)),Makefile.old)
uninstall: $(uninstall-modules) $(uninstall-objects)
	@rmdir --ignore-fail-on-non-empty $(DESTDIR) 2> /dev/null || true
else
uninstall: export NEWLIST = $(objects)
uninstall:
	@$(MAKE) -s -f Makefile.old uninstall

Makefile.old: $(firstword $(MAKEFILE_LIST))
	@cp "$^" "$@"

ifdef SUBDIR
DESTDIR:=$(DESTDIR)/$(SUBDIR)
endif
endif
else
check:
	@$(MAKE) -s -C ../ check
install:
	@$(MAKE) -s -C ../ install
reverse:
	@$(MAKE) -s -C ../ reverse
uninstall:
	@$(MAKE) -s -C ../ uninstall
endif

$(modules): %:
	$(MAKE) -C $*

$(install-objects): install-%: %
	@$(if $(call newer,$*), \
		echo -e "$(FG_GRE)+ $(FG_YEL)$(MKDPREFIX)$* $(CLR_RE)to $(DESTDIR) as $(MODE)"; \
		install -pDm $(MODE) "$*" "$(DESTDIR)/$*", \
		$(if $(call older,$*) ,\
			echo -e "$(FG_RED)- $(FG_YEL)$(MKDPREFIX)$*$(CLR_RE)"))

$(install-modules): install-%:
	@$(MAKE) -s -C $* install MKDPREFIX=$(MKDPREFIX)$*/

$(reverse-objects): reverse-%:
	@$(if $(call older,$*), \
		echo -e "$(FG_GRE)+ $(FG_YEL)$(MKDPREFIX)$*$(CLR_RE)"; \
		cp -a "$(DESTDIR)/$*" "$*", \
		echo -e "$(FG_RED)- $(FG_YEL)$(MKDPREFIX)$*$(CLR_RE)")

$(reverse-modules): reverse-%:
	@$(MAKE) -s -C $* reverse MKDPREFIX=$(MKDPREFIX)$*/

$(uninstall-objects): uninstall-%:
	@$(if $(findstring $*,$(NEWLIST)),, \
		@$(if $(call older,$*), \
	 		echo -e "$(FG_RED)+ $(FG_YEL)$(MKDPREFIX)$*$(CLR_RE)", \
			echo -e "$(FG_GRE)- $(FG_YEL)$(MKDPREFIX)$*$(CLR_RE)"; \
			unlink "$(DESTDIR)/$*" || true))

$(uninstall-modules): uninstall-%:
	@$(MAKE) -C $* uninstall MKDPREFIX=$(MKDPREFIX)$*/

$(check-objects): check-%:
	@$(if $(call newer,$*), \
		echo -e "$(FG_GRE)+ $(FG_YEL)$(MKDPREFIX)$*$(CLR_RE)", \
		$(if $(call older,$*), \
			echo -e "$(FG_RED)- $(FG_YEL)$(MKDPREFIX)$*$(CLR_RE)", \
			echo -e "$(FG_BLU)= $(FG_YEL)$(MKDPREFIX)$*$(CLR_RE)"))

$(check-modules): check-%:
	@$(MAKE) -s -C $* check MKDPREFIX=$(MKDPREFIX)$*/

$(filter %.elc,$(objects)): %.elc: %.el
	$(call compile,$^)