diff options
Diffstat (limited to 'git-version-gen')
| -rwxr-xr-x | git-version-gen | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/git-version-gen b/git-version-gen new file mode 100755 index 0000000..079b93e --- /dev/null +++ b/git-version-gen @@ -0,0 +1,173 @@ +#!/bin/sh +# Print a version string. +scriptversion=2012-09-25.20 + +# Copyright (C) 2007-2008 Free Software Foundation +# +# This program 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, or (at your option) +# any later version. +# +# This program 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 this program; if not, see <http://www.gnu.org/licenses/>. + +# This script is derived from GIT-VERSION-GEN from GIT: http://git.or.cz/. +# It may be run two ways: +# - from a git repository in which the "git describe" command below +# produces useful output (thus requiring at least one signed tag) +# - from a non-git-repo directory containing a .tarball-version file, which +# presumes this script is invoked like "./git-version-gen .tarball-version". + +# In order to use intra-version strings in your project, you will need two +# separate generated version string files: +# +# .tarball-version - present only in a distribution tarball, and not in +# a checked-out repository. Created with contents that were learned at +# the last time autoconf was run, and used by git-version-gen. Must not +# be present in either $(srcdir) or $(builddir) for git-version-gen to +# give accurate answers during normal development with a checked out tree, +# but must be present in a tarball when there is no version control system. +# Therefore, it cannot be used in any dependencies. GNUmakefile has +# hooks to force a reconfigure at distribution time to get the value +# correct, without penalizing normal development with extra reconfigures. +# +# .version - present in a checked-out repository and in a distribution +# tarball. Usable in dependencies, particularly for files that don't +# want to depend on config.h but do want to track version changes. +# Delete this file prior to any autoconf run where you want to rebuild +# files to pick up a version string change; and leave it stale to +# minimize rebuild time after unrelated changes to configure sources. +# +# It is probably wise to add these two files to .gitignore, so that you +# don't accidentally commit either generated file. +# +# Use the following line in your configure.ac, so that $(VERSION) will +# automatically be up-to-date each time configure is run (and note that +# since configure.ac no longer includes a version string, Makefile rules +# should not depend on configure.ac for version updates). +# +# AC_INIT([GNU project], +# m4_esyscmd([build-aux/git-version-gen .tarball-version]), +# [bug-project@example]) +# +# Then use the following lines in your Makefile.am, so that .version +# will be present for dependencies, and so that .tarball-version will +# exist in distribution tarballs. +# +# BUILT_SOURCES = $(top_srcdir)/.version +# $(top_srcdir)/.version: +# echo $(VERSION) > $@-t && mv $@-t $@ +# dist-hook: +# echo $(VERSION) > $(distdir)/.tarball-version +# echo $(VERSION) > $(distdir)/.version + +case $# in + 1) ;; + *) echo 1>&2 "Usage: $0 \$srcdir/.tarball-version"; exit 1;; +esac + +tarball_version_file=$1 +nl=' +' +v= + +# First see if there is a tarball-only version file. +# then try "git describe", then default. +if test -f $tarball_version_file +then + v=`cat $tarball_version_file` || exit 1 + case $v in + *$nl*) v= ;; # reject multi-line output + [0-9]*) + echo "$v" | tr -d '\012' + exit 0 + ;; + *) v= ;; + esac + test -z "$v" \ + && echo "$0: WARNING: $tarball_version_file seems to be damaged" 1>&2 +fi + +# This is presently used by the GNOME-OSTree build system; it +# helps support the case where the meta-build system has already +# determined the git revision, but we may not be able to run "git describe" +# because we're inside a chroot. +if test -n "$GIT_DESCRIBE_FOR_BUILD"; +then + v=$GIT_DESCRIBE_FOR_BUILD +fi + +if test -n "$v" +then + : # use $v +elif test -e .git \ + && v=`git describe --abbrev=4 --match='v[0-9]*' HEAD 2>/dev/null` \ + && [ -n "$v" ] +then + # If we are on a "dev" tag, we need to check that it is not the same + # reference as the a previous version tag (this only happens when we are + # working with a release tag). + # NB The below trick relies on the $v being an exact tag to work which + # will only work when HEAD == tag. When further commits have been made on top + # of the tag, the $v will be supplimented with the number of commits since + # that tag and the commit ref of the most recent commit and thus will + # fail the test below (as intended) + v2=`git describe --abbrev=4 --match='v[0-9]\.[0-9]' --contains $v 2>/dev/null | cut -d'^' -f1` + [ -n "$v2" ] && v=$v2 + + # Is this a new git that lists number of commits since the last + # tag or the previous older version that did not? + # Newer: v6.10-77-g0f8faeb + # Older: v6.10-g0f8faeb +# case $v in +# *-*-*) : git describe is okay three part flavor ;; +# *-*) +# : git describe is older two part flavor +# # Recreate the number of commits and rewrite such that the +# # result is the same as if we were using the newer version +# # of git describe. +# vtag=`echo "$v" | sed 's/-.*//'` +# numcommits=`git rev-list "$vtag"..HEAD | wc -l` +# v=`echo "$v" | sed "s/\(.*\)-\(.*\)/\1-$numcommits-\2/"`; +# ;; +# esac + + # Change the first '-' to a '.', so version-comparing tools work properly. + # Remove the "g" in git describe's output string, to save a byte. +# v=`echo "$v" | sed 's/-/./;s/\(.*\)-g/\1-/'`; + : +else + echo 1>&2 "$0: Failed to determine git revision" + exit 1 +fi + +v=`echo "$v" |sed 's/^v//'` + +# Don't declare a version "dirty" merely because a time stamp has changed. +git status > /dev/null 2>&1 + +dirty=`sh -c 'git diff-index --name-only HEAD' 2>/dev/null` || dirty= +case "$dirty" in + '') ;; + *) # Append the suffix only if there isn't one already. + case $v in + *-dirty) ;; + *) v="$v-dirty" ;; + esac ;; +esac + +# Omit the trailing newline, so that m4_esyscmd can use the result directly. +echo "$v" | tr -d '\012' + +# Local variables: +# eval: (add-hook 'write-file-hooks 'time-stamp) +# time-stamp-start: "scriptversion=" +# time-stamp-format: "%:y-%02m-%02d.%02H" +# time-stamp-end: "$" +# End: |