Add PDF generation support to Makefile

Makefile

@@ -1,32 +1,76 @@
 .SILENT:
 
 OUTDIR?=build
-XMLDEPS=xep.xsl xep.xsd xep.ent xep.dtd ref.xsl
+TEMPDIR?=$(TMPDIR)/xepbuild
+XMLDEPS=xep.xsl xep.xsd xep.ent xep.dtd ref.xsl $(OUTDIR)
+TEXMLDEPS=xep2texml.xsl $(TEMPDIR) $(XMLDEPS) $(TEMPDIR)/xmpp.pdf $(TEMPDIR)/xmpp-text.pdf
+
 
 .PHONY: help
 help:
 	@echo 'XEP makefile targets:'
 	@echo ' '
 	@echo '                  help  -  (this message)'
-	@echo '                   all  -  build all XEPs'
+	@echo '                   all  -  build all XEPs (html and pdfs)'
+	@echo '                   pdf  -  build all XEPs'
+	@echo '                  html  -  build all XEPs'
 	@echo '                 clean  -  recursively unlink the build tree'
-	@echo '              xep-xxxx  -  build xep-xxxx.html'
+	@echo '              xep-xxxx  -  build xep-xxxx.html and xep-xxxx.pdf'
+	@echo '         xep-xxxx.html  -  build xep-xxxx.html'
+	@echo '          xep-xxxx.pdf  -  build xep-xxxx.html'
 	@echo ' '
 	@echo 'Output directory: "$(OUTDIR)/"'
 
 .PHONY: all
-all: $(patsubst %.xml, $(OUTDIR)/%.html, $(wildcard *.xml))
+all: html pdfs
+
+.PHONY: html
+html: $(patsubst %.xml, $(OUTDIR)/%.html, $(wildcard *.xml))
+
+.PHONY: pdf
+pdf: $(patsubst %.xml, $(OUTDIR)/%.pdf, $(wildcard *.xml))
 
 .PHONY: xep-%
-xep-%: $(OUTDIR)/xep-%.html
+xep-%: $(OUTDIR)/xep-%.html $(OUTDIR)/xep-%.pdf
 	
 
-$(OUTDIR)/%.html: %.xml $(XMLDEPS) $(OUTDIR)
+.PHONY: xep-%.html
+xep-%.html: $(OUTDIR)/xep-%.html
+	
+
+.PHONY: xep-%.pdf
+xep-%.pdf: $(OUTDIR)/xep-%.pdf
+	
+
+$(OUTDIR)/%.html: %.xml $(XMLDEPS)
 	xsltproc xep.xsl "$<" > "$@"
 
+$(OUTDIR)/%.pdf: %.xml $(TEMPDIR)/%.xml.texml $(TEMPDIR)/%.xml.texml.tex $(TEXMLDEPS)
+	cd $(TEMPDIR); xelatex $(TEMPDIR)/$<.texml.tex
+	mv $(TEMPDIR)/$<.texml.pdf $(OUTDIR)/$(patsubst %.xml.pdf,%.pdf,$<.pdf)
+
+$(TEMPDIR)/%.xml.texml: %.xml $(TEXMLDEPS) $(TEMPDIR)
+	xsltproc -o $(TEMPDIR)/$<.texml xep2texml.xsl "$<"
+
+$(TEMPDIR)/%.xml.texml.tex: $(TEMPDIR)/%.xml.texml $(OUTDIR) $(TEMPDIR)
+	texml -e utf8 $< $<.tex
+	sed -i 's|\([\s"]\)\([^"]http://[^ "]*\)|\1\\path{\2}|g' $<.tex
+	sed -i 's|\\hyperref\[#\([^}]*\)\]|\\hyperref\[\1\]|g' $<.tex
+	sed -i 's|\\pageref{#\([^}]*\)}|\\pageref{\1}|g' $<.tex
+
+$(TEMPDIR)/xmpp-text.pdf: $(TEMPDIR)
+	-[ -e $(TEMPDIR)/xmpp-text.pdf ] || curl -o "$(TEMPDIR)/xmpp-text.pdf" https://xmpp.org/images/xmpp-text.pdf
+
+$(TEMPDIR)/xmpp.pdf: $(TEMPDIR)
+	-[ -e $(TEMPDIR)/xmpp.pdf ] || curl -o "$(TEMPDIR)/xmpp.pdf" https://xmpp.org/images/xmpp.pdf
+
+$(TEMPDIR):
+	mkdir -p $(TEMPDIR)
+
 $(OUTDIR):
 	mkdir -p $(OUTDIR)
 
 .PHONY: clean
 clean:
+	rm -rf $(TEMPDIR)
 	rm -rf $(OUTDIR)