build-aux/git-version-gen

   1 #!/bin/sh
   2 # Print a version string.
   3 scriptversion=2007-11-03.22
   4
   5 # Copyright (C) 2007 Free Software Foundation
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 3, or (at your option)
  10 # any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program; if not, write to the Free Software
  19 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  20 # 02110-1301, USA.
  21
  22 # This script is derived from GIT-VERSION-GEN from GIT: http://git.or.cz/.
  23 # It may be run two ways:
  24 # - from a git repository in which the git-describe command below
  25 #   produces useful output (thus requiring at least one signed tag)
  26 # - from a non-git-repo directory containing a .version file, which
  27 #   presumes this script is invoked like "./git-version-gen .version".
  28
  29 case $# in
  30     1) ;;
  31     *) echo 1>&2 "Usage: $0 \$srcdir/.version"; exit 1;;
  32 esac
  33
  34 tarball_version_file=$1
  35 nl='
  36 '
  37
  38 # First see if there is a tarball-only version file.
  39 # then try git-describe, then default.
  40 if test -f $tarball_version_file
  41 then
  42     v=`cat $tarball_version_file` || exit 1
  43     case $v in
  44         *$nl*) v= ;; # reject multi-line output
  45         [0-9]*) ;;
  46         *) v= ;;
  47     esac
  48     test -z "$v" \
  49         && echo "$0: WARNING: $tarball_version_file seems to be damaged" 1>&2
  50 fi
  51
  52 if test -n "$v"
  53 then
  54     : # use $v
  55 elif test -d .git \
  56     && v=`git describe --abbrev=4 HEAD 2>/dev/null` \
  57     && case $v in
  58          v[0-9]*) ;;
  59          *) (exit 1) ;;
  60        esac
  61 then
  62     # Change the first '-' to a '.', so version-comparing tools work properly.
  63     # Remove the "g" in git-describe's output string, to save a byte.
  64     v=`echo "$v" | sed 's/-/./;s/\(.*\)-g/\1-/'`;
  65 else
  66     v=UNKNOWN
  67 fi
  68
  69 v=`echo "$v" |sed 's/^v//'`
  70
  71 # Don't declare a version "dirty" merely because a time stamp has changed.
  72 git-status > /dev/null 2>&1
  73
  74 dirty=`sh -c 'git diff-index --name-only HEAD' 2>/dev/null` || dirty=
  75 case "$dirty" in
  76     '') ;;
  77     *) # Append the suffix only if there isn't one already.
  78         case $v in
  79           *-dirty) ;;
  80           *) v="$v-dirty" ;;
  81         esac ;;
  82 esac
  83
  84 # Omit the trailing newline, so that m4_esyscmd can use the result directly.
  85 echo "$v" | tr -d '\012'
  86
  87 # Local variables:
  88 # eval: (add-hook 'write-file-hooks 'time-stamp)
  89 # time-stamp-start: "scriptversion="
  90 # time-stamp-format: "%:y-%02m-%02d.%02H"
  91 # time-stamp-end: "$"
  92 # End: