.SUFFIXES:

SHELL = /bin/sh
INSTALL = install
M4 = m4

T = personal

SUBDIRS = global $(T)

M4FLAGS += $(patsubst %, -I%, $(SUBDIRS))

# these get automatically prefixed with the directory of the makefile that gets
# included, super ugly but haha
AUTOVARS = TARGETS RES M4_DEPS LIBEXEC

define ASSIGN_TEMPLATE =
$(1) := $(2)
endef
$(foreach var,$(AUTOVARS),$(eval $(call ASSIGN_TEMPLATE,ABS_$(var))))

define INCLUDE_TEMPLATE =
$$(foreach var,$(AUTOVARS),$$(eval $$(call ASSIGN_TEMPLATE,$$(var))))
include $(1)/Makefile
$$(foreach var,$(AUTOVARS),$$(eval $$(call ASSIGN_TEMPLATE,ABS_$$(var),$$$$(ABS_$$(var)) $$$$(patsubst %, $(1)/%, $$$$($$(var))))))
endef

$(foreach subdir,$(SUBDIRS),$(eval $(call INCLUDE_TEMPLATE,$(subdir))))
TARGETS := $(ABS_TARGETS)
RES := $(ABS_RES)
$(foreach var,$(AUTOVARS),$(eval $(call ASSIGN_TEMPLATE,$(var),$$(ABS_$(var)))))

INSTALL_TARGETS = $(TARGETS) $(RES)
INSTALL_TARGETS_LIBEXEC = $(LIBEXEC)

.PHONY: all
all: $(TARGETS)

.PHONY: clean
clean:
	$(RM) $(TARGETS)

.PHONY: install
install:
	$(INSTALL) -d $(DESTDIR)/share/html/$(T) $(DESTDIR)/libexec/$(T)
	$(INSTALL) -m644 -t $(DESTDIR)/share/html/$(T) $(INSTALL_TARGETS)
	[[ "$(INSTALL_TARGETS_LIBEXEC)" != "" ]] && $(INSTALL) -m644 -t $(DESTDIR)/libexec/$(T) $(INSTALL_TARGETS_LIBEXEC)

%.html: %.html.m4 $(M4_DEPS)
	$(M4) -DCURPAGE=$(notdir $*) $(M4FLAGS) $< > $@
	sed -i '/^$$/d' $@