sources = ikiwiki

origin_ikiwiki = http://source.jones.dk/ikiwiki_$(underlay).git
underlays_ikiwiki = basewiki smiley templates
master_ikiwiki = master$(locale:%=-$(locale))
locales_ikiwiki = da

#dummies = content_dummy

underlays_l10n = $(foreach source, $(sources), $(foreach locale, $(locales_$(source)), $(patsubst %,%_l10n/$(locale),$(underlays_$(source)))))
underlays = $(foreach source, $(sources), $(underlays_$(source))) $(underlays_l10n)

source_of_underlay = $(firstword $(foreach source, $(sources), $(if $(filter $(underlay),$(underlays_$(source))),$(source))))
origin = $(origin_$(source_of_underlay))
master = $(master_$(source_of_underlay))

all: $(underlays) $(dummies)

$(underlays): locale=$(if $(filter l10n/,$(lastword $(subst _, ,$(dir $@)))),$(notdir $@))
$(underlays): underlay=$(@:%_l10n/$(locale)=%)
$(underlays):
	mkdir -p $@
	@if [ -d "$@/.git" ]; then \
		cd $@ && \
		git pull; \
	else \
		cd $@ && \
		git init && \
		git remote add -f -t $(master) -m $(master) origin $(origin) && \
		git merge origin; \
	fi

$(dummies):
	mkdir -p $@

# WARNING: this may wipe unrelated files too!
ultraclean:
	rm -rf $(underlays)
	rm -rf $(dir $(underlays_l10n))
	rm -rf $(dummies)

.PHONY: $(underlays)