########################################################################
# Copyright (C) 2021, 2022  Alejandro Colomar <alx@kernel.org>
# SPDX-License-Identifier:  GPL-2.0  OR  LGPL-2.0
########################################################################


ifndef MAKEFILE_DIST_INCLUDED
MAKEFILE_DIST_INCLUDED := 1


include $(srcdir)/lib/build.mk
include $(srcdir)/lib/cmd.mk
include $(srcdir)/lib/install.mk
include $(srcdir)/lib/version.mk
include $(srcdir)/lib/verbose.mk



_DISTDIR := $(builddir)/dist

DEFAULT_TARFLAGS := --sort=name
DEFAULT_TARFLAGS += --owner=root:0
DEFAULT_TARFLAGS += --group=root:0
DEFAULT_TARFLAGS += --mtime='$(DISTDATE)'
EXTRA_TARFLAGS   :=
TARFLAGS         := $(DEFAULT_TARFLAGS) $(EXTRA_TARFLAGS)

DISTFILES   := $(shell $(GIT) ls-files $(HIDE_ERR) | $(SED) 's,^,$(srcdir)/,')
_DISTFILES  := $(patsubst $(srcdir)/%,$(_DISTDIR)/%,$(DISTFILES))
_DISTPAGES  := $(filter     $(_DISTDIR)/man%,$(_DISTFILES))
_DISTOTHERS := $(filter-out $(_DISTDIR)/man%,$(_DISTFILES))

DISTFILE    := $(builddir)/$(DISTNAME).tar
compression := bz2 gz xz
dist        := $(foreach x,$(compression),dist-$(x))


$(_DISTPAGES): $(_DISTDIR)/man%: $(srcdir)/man% | $$(@D)/
	$(info INSTALL	$@)
	$(INSTALL_DATA) -T $< $@
	$(SED) -i '/^.TH/s/(unreleased)/$(DISTVERSION)/' $@
	$(SED) -i "/^.TH/s/(date)/$$(git log --format=%cs -1 -- $< $(HIDE_ERR))/" $@

$(_DISTOTHERS): $(_DISTDIR)/%: $(srcdir)/% | $$(@D)/
	$(info CP	$@)
	$(CP) -T $< $@


$(DISTFILE): $(_DISTFILES) | $$(@D)/
	$(info TAR	$@)
	$(TAR) $(TARFLAGS) -cf $@ -T /dev/null
	$(GIT) ls-files \
	| $(SED) 's,^,$(_DISTDIR)/,' \
	| $(XARGS) $(TAR) $(TARFLAGS) -rf $@ -C $(srcdir) \
		--transform 's,^$(_DISTDIR),$(DISTNAME),'

$(DISTFILE).bz2: %.bz2: % | $$(@D)/
	$(info BZIP2	$@)
	$(BZIP2) -kf $<
	touch $@

$(DISTFILE).gz: %.gz: % | $$(@D)/
	$(info GZIP	$@)
	$(GZIP) -knf $<

$(DISTFILE).xz: %.xz: % | $$(@D)/
	$(info XZ	$@)
	$(XZ) -kf $<


.PHONY: dist-tar
dist-tar: $(DISTFILE)
	@:

.PHONY: $(dist)
$(dist): dist-%: $(DISTFILE).%
	@:

.PHONY: dist
dist: $(dist)
	@:


endif  # MAKEFILE_DIST_INCLUDED