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#!/bin/sh
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# Print a version string.
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scriptversion=2010-01-28.01
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# Copyright (C) 2007-2010 Free Software Foundation, Inc.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# This script is derived from GIT-VERSION-GEN from GIT: http://git.or.cz/.
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# It may be run two ways:
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# - from a git repository in which the "git describe" command below
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# produces useful output (thus requiring at least one signed tag)
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# - from a non-git-repo directory containing a .tarball-version file, which
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# presumes this script is invoked like "./git-version-gen .tarball-version".
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# In order to use intra-version strings in your project, you will need two
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# separate generated version string files:
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#
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# .tarball-version - present only in a distribution tarball, and not in
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# a checked-out repository. Created with contents that were learned at
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# the last time autoconf was run, and used by git-version-gen. Must not
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# be present in either $(srcdir) or $(builddir) for git-version-gen to
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# give accurate answers during normal development with a checked out tree,
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# but must be present in a tarball when there is no version control system.
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# Therefore, it cannot be used in any dependencies. GNUmakefile has
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# hooks to force a reconfigure at distribution time to get the value
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# correct, without penalizing normal development with extra reconfigures.
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#
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# .version - present in a checked-out repository and in a distribution
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# tarball. Usable in dependencies, particularly for files that don't
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# want to depend on config.h but do want to track version changes.
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# Delete this file prior to any autoconf run where you want to rebuild
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# files to pick up a version string change; and leave it stale to
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# minimize rebuild time after unrelated changes to configure sources.
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#
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# It is probably wise to add these two files to .gitignore, so that you
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# don't accidentally commit either generated file.
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#
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# Use the following line in your configure.ac, so that $(VERSION) will
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# automatically be up-to-date each time configure is run (and note that
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# since configure.ac no longer includes a version string, Makefile rules
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# should not depend on configure.ac for version updates).
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#
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# AC_INIT([GNU project],
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# m4_esyscmd([build-aux/git-version-gen .tarball-version]),
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# [bug-project@example])
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#
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# Then use the following lines in your Makefile.am, so that .version
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# will be present for dependencies, and so that .tarball-version will
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# exist in distribution tarballs.
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#
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# BUILT_SOURCES = $(top_srcdir)/.version
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# $(top_srcdir)/.version:
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# echo $(VERSION) > $@-t && mv $@-t $@
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# dist-hook:
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# echo $(VERSION) > $(distdir)/.tarball-version
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case $# in
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1) ;;
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*) echo 1>&2 "Usage: $0 \$srcdir/.tarball-version"; exit 1;;
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esac
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tarball_version_file=$1
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nl='
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'
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# First see if there is a tarball-only version file.
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# then try "git describe", then default.
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if test -f $tarball_version_file
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then
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v=`cat $tarball_version_file` || exit 1
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case $v in
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*$nl*) v= ;; # reject multi-line output
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[0-9]*) ;;
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*) v= ;;
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esac
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test -z "$v" \
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&& echo "$0: WARNING: $tarball_version_file seems to be damaged" 1>&2
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fi
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if test -n "$v"
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then
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: # use $v
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elif
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v=`git describe --abbrev=4 --match='v*' HEAD 2>/dev/null \
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|| git describe --abbrev=4 HEAD 2>/dev/null` \
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&& case $v in
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[0-9]*) ;;
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v[0-9]*) ;;
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*) (exit 1) ;;
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esac
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then
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# Is this a new git that lists number of commits since the last
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# tag or the previous older version that did not?
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# Newer: v6.10-77-g0f8faeb
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# Older: v6.10-g0f8faeb
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case $v in
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*-*-*) : git describe is okay three part flavor ;;
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*-*)
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: git describe is older two part flavor
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# Recreate the number of commits and rewrite such that the
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# result is the same as if we were using the newer version
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# of git describe.
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vtag=`echo "$v" | sed 's/-.*//'`
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numcommits=`git rev-list "$vtag"..HEAD | wc -l`
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v=`echo "$v" | sed "s/\(.*\)-\(.*\)/\1-$numcommits-\2/"`;
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;;
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esac
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# Change the first '-' to a '.', so version-comparing tools work properly.
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# Remove the "g" in git describe's output string, to save a byte.
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v=`echo "$v" | sed 's/-/./;s/\(.*\)-g/\1-/'`;
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else
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v=UNKNOWN
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fi
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v=`echo "$v" |sed 's/^v//'`
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# Don't declare a version "dirty" merely because a time stamp has changed.
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git status > /dev/null 2>&1
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dirty=`sh -c 'git diff-index --name-only HEAD' 2>/dev/null` || dirty=
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case "$dirty" in
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'') ;;
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*) # Append the suffix only if there isn't one already.
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case $v in
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*-dirty) ;;
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*) v="$v-dirty" ;;
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esac ;;
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esac
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# Omit the trailing newline, so that m4_esyscmd can use the result directly.
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echo "$v" | tr -d '\012'
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# Local variables:
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# eval: (add-hook 'write-file-hooks 'time-stamp)
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# time-stamp-start: "scriptversion="
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# time-stamp-format: "%:y-%02m-%02d.%02H"
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# time-stamp-end: "$"
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# End:
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