#PACKAGE_VERSION = $(/bin/fgrep GK_V= genkernel | sed "s/.*GK_V='\([^']\+\)'/\1/")
PACKAGE_VERSION = $(git describe --tags |sed 's,^v,,g')
distdir = genkernel-$(PACKAGE_VERSION)
MANPAGE = genkernel.8
# Add off-Git/generated files here that need to be shipped with releases
EXTRA_DIST = $(MANPAGE) ChangeLog $(KCONF)

default: kconfig man

# First argument in the override file
# Second argument is the base file
BASE_KCONF = defaults/kernel-generic-config
ARCH_KCONF = $(wildcard arch/*/arch-config)
GENERATED_KCONF = $(subst arch-,generated-,$(ARCH_KCONF))
KCONF = $(GENERATED_KCONF)

debug:
	@echo "ARCH_KCONF=$(ARCH_KCONF)"
	@echo "GENERATED_KCONF=$(GENERATED_KCONF)"

kconfig: $(GENERATED_KCONF)
man: $(MANPAGE)

ChangeLog:
	git log >$@

clean:
	rm -f $(EXTRA_DIST)

check-git-repository:
ifneq ($(UNCLEAN),1)
	git diff --quiet || { echo 'STOP, you have uncommitted changes in the working directory' ; false ; }
	git diff --cached --quiet || { echo 'STOP, you have uncommitted changes in the index' ; false ; }
else
	@true
endif

dist: verify-doc check-git-repository distclean $(EXTRA_DIST)
	mkdir "$(distdir)"
	git ls-files -z | xargs -0 cp --no-dereference --parents --target-directory="$(distdir)" \
		$(EXTRA_DIST)
	tar cf "$(distdir)".tar "$(distdir)"
	xz -v "$(distdir)".tar
	rm -Rf "$(distdir)"

distclean: clean
	rm -Rf "$(distdir)" "$(distdir)".tar "$(distdir)".tar.xz

.PHONY: clean check-git-repository dist distclean kconfig verify-doc

# Generic rules
%/generated-config: %/arch-config $(BASE_KCONF) merge.pl Makefile
	if grep -sq THIS_CONFIG_IS_BROKEN $< ; then \
		cat $< >$@ ; \
	else \
		perl merge.pl $< $(BASE_KCONF) > $@ ; \
	fi ;

%.8: doc/%.8.txt doc/asciidoc.conf Makefile genkernel
	a2x --conf-file=doc/asciidoc.conf --attribute="genkernelversion=$(PACKAGE_VERSION)" \
		 --format=manpage -D . "$<"

verify-doc: doc/genkernel.8.txt
	@rm -f faildoc ; \
	GK_SHARE=. ./genkernel --help | \
		sed 's,-->, ,g' | \
		fmt -1 | \
		grep -e '--' | \
		tr -s '[:space:].,' ' ' | \
		sed -r \
			-e 's,=<[^>]+>,,g' | \
		tr -s ' ' '\n' | \
		sed -r \
			-e 's,[[:space:]]*--(no-)?,,g' \
			-e '/bootloader/s,=\(grub\|grub2\),,g' \
			-e '/microcode/s,\[\],,g' | \
		while read opt ; do \
			regex="^*--(...no-...)?$$opt" ; \
			if ! egrep -e "$$regex" $< -sq ; then \
				touch faildoc ; \
				echo "Undocumented option: $$opt" ; \
			fi ; \
		done ; \
	if test -e faildoc ; then \
		echo "Refusing to build!" ; \
		rm -f faildoc ; \
		exit 1 ; \
	fi ; \
	rm -f faildoc