draft generation and snapshots

Makefile

KDRFC	= ${HOME}/.gem/ruby/2.3.0/bin/kramdown-rfc2629
XML2RFC	= xml2rfc
RM		= rm -f

SRC		= $(wildcard *.md)

.PHONY: snapshot cleanall

all: $(SRC:.md=.xml) $(SRC:.md=.txt) $(SRC:.md=.html)

define fix-xml
	sed -i "" -e ':a' -e 'N' -e '$$!ba' -e 's/\(<postal>\n\)\( *\)\(<country>\)/\1\2<street><\/street>\'$$'\n\\2\\3/g' -e 's/\(Email: [^<]*\)/\1<vspace blankLines=\"1\" \/>/g' $*.xml
endef

define take-snapshot
	if [ ! -e "snapshots" ]; then mkdir "snapshots"; res="1a"; else if [ ! -d "snapshots" ]; then echo "snapshots is not a directory"; exit 1; fi; a=(`ls -r "snapshots" | egrep '$(basename $<)-rev[1-9][0-9]*[a-z].txt' | head -1`); if [ -z "$$a" ]; then res="1a"; else b=$${a##*-rev}; c=$${b%%.*}; n=$${c:0:1}; l=$${c:1:1}; if [ $$l = "z" ]; then n=$$((n+1)); fi; la=`printf "%d" "'$$l"`; l=`printf "\x$$(printf %x $$((97+(la-96)%26)))"`; res="$$n$$l"; fi; fi; cp $< snapshots/$(basename $<)-rev$${res}.txt;
endef

%.xml: %.md
	@$(KDRFC) $< > $*.xml
	@$(fix-xml)

%.txt: %.xml
	@$(XML2RFC) --text $<

%.html: %.xml
	@$(XML2RFC) --html $<

snapshot: $(SRC:.md=.txt)
	@$(take-snapshot)

cleanall:
	@$(RM) $(SRC:.md=.xml) $(SRC:.md=.txt) $(SRC:.md=.html)