tool:=$(dir $(lastword $(MAKEFILE_LIST)))

all: $(HOME)/.asciidoc/backends/slidy2

$(HOME)/.asciidoc/backends/slidy2: tool:=$(tool)
$(HOME)/.asciidoc/backends/slidy2: \
 $(tool)/.../lib/tool/asciidoc/backend/slidy2/install
	$<

tool/asciidoc := $(tool)/.../lib/tool/asciidoc
include $(tool/asciidoc)/GNUmakefile

export VERSION:=$(patsubst v%,%,$(shell which git >/dev/null && \
	git describe --tags --match 'v[0-9][0-9][0-9][0-9].[0-9][0-9].[0-9][0-9]' --always || \
	TZ=UTC date +'v%Y.%m.%d'))

### lib
tool/lib/targets:=$(addprefix .../,$(shell cd ... && git config -f .gitmodules \
 --get-regexp submodule'\.lib/.*\.'path | \
 cut -d ' ' -f 2))
.PHONY: $(tool/lib/targets) $(tool)/lib/all $(tool)/lib
$(tool/lib/targets):
	cd "$(tool)"/... && git submodule update --init -- $(patsubst .../%,%,$@)
	cd "$(tool)"/$@ && git checkout -f HEAD && git clean -dfx
$(tool)/.../lib: $(tool)/lib/all
$(tool)/.../lib/all: $(tool/lib/targets)
$(tool)/.../lib/tool/asciidoc/GNUmakefile: \
 $(if $(wildcard .../lib/tool/asciidoc/.git),,.../lib/tool/asciidoc)
	

### slidy
%.slidy.html: export ASCIIDOC_FLAGS+=-arevnumber="$(VERSION)"
%.slidy.html: export ASCIIDOC_FLAGS+=-atabsize=0
%.slidy.html: export ASCIIDOC_FLAGS+=-alatexmath=0

$(patsubst %.ad,%.html,$(wildcard *.slidy.ad)): \
 $(tool/asciidoc)/conf/latexmath.conf \
 $(tool/asciidoc)/conf/vim.conf