default: convert

# Where to find Docbook 4 man page sources
OLDMAN = docbook4

# Converting Docbook 4 -> Docbook 5 - now use local (up to date) copy
#DB4UPGRADE = /usr/share/xml/docbook/stylesheet/docbook5/db4-upgrade.xsl
DB4UPGRADE = db4-upgrade.xsl
DOCBOOK5CONV = xsltproc $(DB4UPGRADE)

# Files to copy from parent directory (not legal Docbook 4)
COPYFILES = reference.xml

# Must edit XIncludes to declare Docbook namespace, which DB4 doesn't allow
# This works on either <table> or <informaltable> root elements
$(COPYFILES): $@
	cp $(OLDMAN)/$@ $@
	sed -i \
	    -e 's#<table>#<table xmlns="http://docbook.org/ns/docbook" version="5.0">#g' \
	    -e 's#<informaltable>#<informaltable xmlns="http://docbook.org/ns/docbook" version="5.0">#g' \
	    $@

SRCXML = $(wildcard $(OLDMAN)/egl[A-Z]*.xml)
XML = $(filter-out $(COPYFILES),$(patsubst $(OLDMAN)/%.xml,%.xml,$(SRCXML)))

## $(XML): %.xml: $(OLDMAN)/%.xml DOCTYPE.txt $(DB4UPGRADE)
##	   cp DOCTYPE.txt $@

$(XML): %.xml: $(OLDMAN)/%.xml $(DB4UPGRADE)
	sed -e 's/&/AMPER/g' < $< | \
	    $(DOCBOOK5CONV) - | \
	    sed -e 's/AMPER/\&/g' >> $@

# Actually convert pages from Docbook4 -> Docbook 5
convert: $(XML) $(COPYFILES)

# Remove generated targets
clean clobber:
	-rm -f $(XML) $(COPYFILES)