git-version-gen.mk

#                                                                -*-Automake-*-
# Copyright (C) 2009 by Thomas Moulard, AIST, CNRS, INRIA.
# This file is part of the roboptim.
#
# roboptim is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Additional permission under section 7 of the GNU General Public
# License, version 3 ("GPLv3"):
#
# If you convey this file as part of a work that contains a
# configuration script generated by Autoconf, you may do so under
# terms of your choice.
#
# roboptim is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with roboptim.  If not, see <http://www.gnu.org/licenses/>.

EXTRA_DIST += 						\
	$(top_srcdir)/build-aux/git-version-gen

# Update version files when needed.
BUILT_SOURCES = $(top_srcdir)/.version

CURRENT_VERSION = \
	`cd $(srcdir) && ./build-aux/git-version-gen .tarball-version`

#  Do not generate .version in distributed tarball.
$(top_srcdir)/.version:
	if ! test -f $(top_srcdir)/.tarball-version; then	\
	 echo $(VERSION) > $@-t && mv $@-t $@;			\
	fi

# Make sure one is not installing the software if the version string
# is out-of-date. As the GNU coding standards states that ``make install''
# should not cause recompilation, the rule just prevent the install from
# being done but do not regenerate the version string automatically.
.PHONY: check-version
check-version:
	@if ! test x$(CURRENT_VERSION) = x$(VERSION); then		\
	 echo "WARNING: Version string is out of date.";		\
	 echo "         please run \`\`make _version'' and reinstall.";	\
	 exit 42;							\
	fi

#FIXME: this is too annoying, disable for now.
#install-exec-hook: check-version
#install-data-hook: check-version


# Check that the version is up-to-date or regenerate if required.
# Then, generate .tarball-version file to bundle the tarball with a
# valid version number even if git directory is not available.
dist-hook:
	@if ! test x$(CURRENT_VERSION) = x$(VERSION); then		\
		echo "Version string is out of date, regenerating.";	\
		$(MAKE) $(AM_MAKEFLAGS) _version;			\
	fi;								\
	echo $(VERSION) > $(distdir)/.tarball-version

# Regenerate version string.
.PHONY: _version
_version:
	cd $(srcdir) && rm -rf autom4te.cache .version && autoreconf