### Programme ###
# XSLT-Prozessor:
PROCESSOR=xsltproc
# Downloadmanager (Alternativ: curl, fetch):
WGET=wget
# Editor
EDITOR?=vim
# Browser
BROWSER?=links

### Ressourcen ###
# XSLT-Stylesheets:
STYLE=xsl/xhtml.xsl
STYLE_RSS=xsl/rss.xsl
# Navigationsleiste:
NAVIGATION=content/navigation.xml
# XML-Skeletons
SKELETONS:=$(wildcard content/skel-*.xml)
SKEL:=empty
# Zu verwendendes Skeleton
SKELFILE=content/skel-$(SKEL).xml
# Dateinamen der Inhalte:
CONTENT=$(PAGES) www/news.html www/news-rss.xml
PAGES:=$(patsubst content/%.xml, www/%.html, $(filter-out $(NAVIGATION) $(SKELETONS), $(wildcard content/*.xml)))
NEWSITEMS:=$(wildcard content/news/*.xml)
CLEAN:=$(CONTENT) www/news.html www/news-rss.xml chaosupdates.rdf

### Defaults ###
.PHONY: contents clean
.DEFAULT: contents
.PRECIOUS: content/%.xml www/%.html

contents: $(CONTENT)

### Regeln für den XSLT-Prozess ###
www/news.html: $(STYLE)
www/news-rss.xml: $(STYLE_RSS)

www/news.html www/news-rss.xml: $(NEWSITEMS) $(NAVIGATION)
	{ echo '<?xml version="1.0" encoding="UTF-8"?>' ; \
	echo "<page>"; \
	echo "  <news>"; \
	for item in $(NEWSITEMS) ; do \
	  echo "    <newsfile>$${item}</newsfile>"; \
	done; \
	echo "  </news>"; \
	echo "</page>"; } | \
	$(PROCESSOR) -o $@ $(filter-out $(NEWSITEMS) $(NAVIGATION),$^) -

www/%.html: content/%.xml $(STYLE) $(NAVIGATION) chaosupdates.rdf
	$(PROCESSOR) -o $@ $(STYLE) $<

### Hilfsregeln zum Editieren ###
edit/%:
	@if [ ! -e  content/$(@F).xml ] ; then \
		cp $(SKELFILE) content/$(@F).xml ;\
	fi

	@$(EDITOR) content/$(@F).xml

	@if diff -q $(SKELFILE) content/$(@F).xml >/dev/null ; then \
		echo "Warning: content/$(@F).xml does not differ from the skeleton $(SKELFILE)" ;\
		rm -i content/$(@F).xml ;\
	fi

view/%: www/%.html
	@$(BROWSER) $<

content/%.xml:
	$(MAKE) edit/$(patsubst content/%.xml,%,$@)


### Die neuesten Chaosupdates holen ###
chaosupdates.rdf:
	$(WGET) http://www.ccc.de/updates/chaosupdates.rdf


### Mr. Propper ###
clean:
	rm -f $(CLEAN)