.PHONY: all .FORCE
.FORCE:
all:

# -----------------------------------------------------------------------------
# Dive into subdirectories
# -----------------------------------------------------------------------------

SUBDIRS := $(shell find */* -name "Makefile" | xargs dirname)

$(SUBDIRS): .FORCE
	$(MAKE) -j -k -C $@ || true

all: $(SUBDIRS)

# -----------------------------------------------------------------------------
# Handle local menus
# -----------------------------------------------------------------------------

MENUSOURCES := $(shell find -name '*.xhtml' |xargs grep -l '<localmenu.*</localmenu>' )

localmenuinfo.en.xml: ./tools/buildmenu.xsl $(MENUSOURCES)
	{ printf '<localmenuset>'; \
	  grep -E '<localmenu.*</localmenu>' $^ \
          | sed -r 's;(.*/)?(.+)\.([a-z][a-z])\.xhtml:(.+);\
                    <menuitem language="\3"><dir>/\1</dir><link>\2.html</link>\4</menuitem>;'; \
	  printf '</localmenuset>'; \
	} | xsltproc -o $@ $< -

all: localmenuinfo.en.xml

# -----------------------------------------------------------------------------
# Timestamp files for regular jobs and XML inclusion in various places
# -----------------------------------------------------------------------------

YEAR  := <?xml version="1.0" encoding="utf-8"?><dateset><date year="$(shell date +%Y)" /></dateset> 
MONTH := <?xml version="1.0" encoding="utf-8"?><dateset><date month="$(shell date +%Y-%m)" /></dateset> 
DAY   := <?xml version="1.0" encoding="utf-8"?><dateset><date day="$(shell date +%Y-%m-%d)" /></dateset>

d_day.en.xml: $(if $(findstring   $(DAY),$(shell cat d_day.en.xml)),,.FORCE)
	printf %s\\n   '$(DAY)' >$@
d_month.en.xml: $(if $(findstring $(MONTH),$(shell cat d_month.en.xml)),,.FORCE)
	printf %s\\n '$(MONTH)' >$@
d_year.en.xml: $(if $(findstring  $(YEAR),$(shell cat d_year.en.xml)),,.FORCE)
	printf %s\\n  '$(YEAR)' >$@

all: d_year.en.xml d_month.en.xml d_day.en.xml

# -----------------------------------------------------------------------------
# Update .sources files
# -----------------------------------------------------------------------------

# use shell globbing to work around faulty globbing in gnu make
SOURCEDIRS = $(shell sed -rn 's;^(.*/)[^/]*:(\[\]|global)$$;\1;gp' $@ \
               | while read glob; do \
                 printf '%s\n' $$glob; \
               done \
              )
SOURCEREQS = $(shell ./build/source_globber.sh sourceglobs $@ |sed -r 's;$$;.??.xml;g')

all: $(shell find ./ -name '*.sources')

# -----------------------------------------------------------------------------
# generate tag maps
# -----------------------------------------------------------------------------

TAGMAP := $(shell find $(PWD) -name '*.xml' \
             | xargs ./build/source_globber.sh map_tags \
            )

TAGNAMES := $(shell printf %s '$(TAGMAP)' \
              | cut -d" " -f2- \
              | tr ' ' '\n' \
              | grep -vE '[\$%/:()]' \
              | sort -u \
              | xargs printf 'tools/tagmaps/%s.map ' \
             )

MAPREQS = $(shell printf %s '$(TAGMAP)' \
            | sed -r 's;[^ ]+\...\.xml;\n&;g' \
            | grep ' $*' \
            | cut -d' ' -f1 \
           )

all: $(TAGNAMES)

# -----------------------------------------------------------------------------
# Second Expansion rules
# -----------------------------------------------------------------------------
.SECONDEXPANSION:

%.sources: $$(SOURCEDIRS) $$(SOURCEREQS) | $(TAGNAMES)
	touch $@

tools/tagmaps/%.map: $$(MAPREQS) | $(SUBDIRS)
	printf '%s\n' $^ > $@