export VERSION:=$(patsubst v%,%,$(shell \
	test -e VERSION && cat VERSION || { \
	test -e .git && 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'; }))

.PHONY: all all/%
.DEFAULT_GOAL: all
all: src/all
all/%: src/all/%
	

# ----------
# gitmodules
# ----------
.gitmodules= \
	$(patsubst %,$(if $1,$1/)%,$(shell \
		$(if $1,cd $1 &&) \
		if test -e .gitmodules && which git >/dev/null; \
		 then git config -f .gitmodules --get-regexp submodule'\..*\.'path | \
			cut -d ' ' -f 2; fi))
gitmodules:=$(.gitmodules)

define gitmodules/.git
$1/.git:
	git submodule update --init --recursive -- $$(@:/.git=)
	cd $$(@:/.git=) && git checkout -f HEAD && git clean -dfx
$1/%: $1/.git
	
endef
$(if $(wildcard .git), \
 $(foreach m,$(gitmodules), \
	 $(eval $(call gitmodules/.git,$m))))

# ------
# debian
# ------
.PHONY: debian debian/%
.PRECIOUS: lib/tool/pkg/debian/GNUmakefile
debian: debian/build
debian/%: export GIT_DCH_FLAGS+=--new-version \
	$(shell printf %s '$(VERSION)' | sed -e s/-/./ -e s/-/./)
debian/%: lib/tool/pkg/debian/GNUmakefile
	$(MAKE) -f $< $(patsubst debian/%,%,$@)

# ---
# doc
# ---
.PHONY: doc doc/%
.PRECIOUS: lib/tool/asciidoc/GNUmakefile
doc: doc/all
doc/%: export A2X_FLAGS+=-aname="$(package)"
doc/%: export A2X_FLAGS+=-aversion="$(VERSION)"
doc/%: export MANLEVELS+=$(package) 3cm
doc/%: export SRCDIR:=doc
doc/%: lib/tool/asciidoc/GNUmakefile
	$(MAKE) -f $< $(patsubst doc/%,%,$@)
c clean: doc/clean

# -------
# archive
# -------
.PHONY: archive/%
.PRECIOUS: lib/tool/pkg/archive/GNUmakefile
archive/%: lib/tool/pkg/archive/GNUmakefile
	$(MAKE) -f $< $(patsubst archive/%,%,$@)
c clean: archive/clean

# ---
# src
# ---
.PHONY: c clean cc cleaner b byte n native src
.PRECIOUS: lib/libocaml/make/GNUmakefile
src/%: export SRCDIR:=src
src/%: lib/libocaml/make/GNUmakefile
	$(MAKE) -f $< $@
src:          src/all
c clean:      src/clean
cc cleaner:   src/cleaner
b byte:       src/byte
n native:     src/native
b/% byte/%:   src/byte/%
	
n/% native/%: src/native/%
	

# ----
# test
# ----
.PHONY: test test/%
.PHONY: tc tcc tb tn txb txn t test
test/%: export SRCDIR:=test
test/%: lib/libocaml/make/GNUmakefile
	$(MAKE) -f $< $@
c clean:     test/clean
cc cleaner:  test/cleaner
test/byte:   src/byte
test/native: src/native
tc:          test/clean
tcc:         test/cleaner
tb:          test/byte
tn:          test/native
txb:         test/exec-byte
txn:         test/exec-native
t test:      test/all

# -------
# install
# -------
.PHONY: u uninstall i install
install+=$(or $(filter i,$(MAKECMDGOALS)),$(filter install,$(MAKECMDGOALS)))
ifneq ($(install),)
include src/configure.make
endif
u uninstall:
	ocamlfind remove \
	 $(if $(DESTDIR),-destdir $(DESTDIR)) \
	 $(OCAMLFIND_REMOVE_FLAGS) \
	 $(package)
i install: uninstall
	$(if $(DESTDIR),mkdir -p $(DESTDIR))
	ocamlfind install \
	 $(if $(DESTDIR),-destdir $(DESTDIR)) \
	 $(OCAMLFIND_INSTALL_FLAGS) \
	 $(package) \
	 src/META \
	 $(OCAMLFIND_INSTALL_FILES) \