Harald Welte | 8abda69 | 2010-03-23 00:30:19 +0800 | [diff] [blame] | 1 | #!/bin/sh |
| 2 | # Print a version string. |
| 3 | scriptversion=2010-01-28.01 |
| 4 | |
| 5 | # Copyright (C) 2007-2010 Free Software Foundation, Inc. |
| 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 of the License, or |
| 10 | # (at your option) 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, see <http://www.gnu.org/licenses/>. |
| 19 | |
| 20 | # This script is derived from GIT-VERSION-GEN from GIT: http://git.or.cz/. |
| 21 | # It may be run two ways: |
| 22 | # - from a git repository in which the "git describe" command below |
| 23 | # produces useful output (thus requiring at least one signed tag) |
| 24 | # - from a non-git-repo directory containing a .tarball-version file, which |
| 25 | # presumes this script is invoked like "./git-version-gen .tarball-version". |
| 26 | |
| 27 | # In order to use intra-version strings in your project, you will need two |
| 28 | # separate generated version string files: |
| 29 | # |
| 30 | # .tarball-version - present only in a distribution tarball, and not in |
| 31 | # a checked-out repository. Created with contents that were learned at |
| 32 | # the last time autoconf was run, and used by git-version-gen. Must not |
| 33 | # be present in either $(srcdir) or $(builddir) for git-version-gen to |
| 34 | # give accurate answers during normal development with a checked out tree, |
| 35 | # but must be present in a tarball when there is no version control system. |
| 36 | # Therefore, it cannot be used in any dependencies. GNUmakefile has |
| 37 | # hooks to force a reconfigure at distribution time to get the value |
| 38 | # correct, without penalizing normal development with extra reconfigures. |
| 39 | # |
| 40 | # .version - present in a checked-out repository and in a distribution |
| 41 | # tarball. Usable in dependencies, particularly for files that don't |
| 42 | # want to depend on config.h but do want to track version changes. |
| 43 | # Delete this file prior to any autoconf run where you want to rebuild |
| 44 | # files to pick up a version string change; and leave it stale to |
| 45 | # minimize rebuild time after unrelated changes to configure sources. |
| 46 | # |
| 47 | # It is probably wise to add these two files to .gitignore, so that you |
| 48 | # don't accidentally commit either generated file. |
| 49 | # |
| 50 | # Use the following line in your configure.ac, so that $(VERSION) will |
| 51 | # automatically be up-to-date each time configure is run (and note that |
| 52 | # since configure.ac no longer includes a version string, Makefile rules |
| 53 | # should not depend on configure.ac for version updates). |
| 54 | # |
| 55 | # AC_INIT([GNU project], |
| 56 | # m4_esyscmd([build-aux/git-version-gen .tarball-version]), |
| 57 | # [bug-project@example]) |
| 58 | # |
| 59 | # Then use the following lines in your Makefile.am, so that .version |
| 60 | # will be present for dependencies, and so that .tarball-version will |
| 61 | # exist in distribution tarballs. |
| 62 | # |
| 63 | # BUILT_SOURCES = $(top_srcdir)/.version |
| 64 | # $(top_srcdir)/.version: |
| 65 | # echo $(VERSION) > $@-t && mv $@-t $@ |
| 66 | # dist-hook: |
| 67 | # echo $(VERSION) > $(distdir)/.tarball-version |
| 68 | |
| 69 | case $# in |
| 70 | 1) ;; |
| 71 | *) echo 1>&2 "Usage: $0 \$srcdir/.tarball-version"; exit 1;; |
| 72 | esac |
| 73 | |
| 74 | tarball_version_file=$1 |
| 75 | nl=' |
| 76 | ' |
| 77 | |
| 78 | # First see if there is a tarball-only version file. |
| 79 | # then try "git describe", then default. |
| 80 | if test -f $tarball_version_file |
| 81 | then |
| 82 | v=`cat $tarball_version_file` || exit 1 |
| 83 | case $v in |
| 84 | *$nl*) v= ;; # reject multi-line output |
| 85 | [0-9]*) ;; |
| 86 | *) v= ;; |
| 87 | esac |
| 88 | test -z "$v" \ |
| 89 | && echo "$0: WARNING: $tarball_version_file seems to be damaged" 1>&2 |
| 90 | fi |
| 91 | |
| 92 | if test -n "$v" |
| 93 | then |
| 94 | : # use $v |
| 95 | elif |
| 96 | v=`git describe --abbrev=4 --match='v*' HEAD 2>/dev/null \ |
| 97 | || git describe --abbrev=4 HEAD 2>/dev/null` \ |
| 98 | && case $v in |
| 99 | [0-9]*) ;; |
| 100 | v[0-9]*) ;; |
| 101 | *) (exit 1) ;; |
| 102 | esac |
| 103 | then |
| 104 | # Is this a new git that lists number of commits since the last |
| 105 | # tag or the previous older version that did not? |
| 106 | # Newer: v6.10-77-g0f8faeb |
| 107 | # Older: v6.10-g0f8faeb |
| 108 | case $v in |
| 109 | *-*-*) : git describe is okay three part flavor ;; |
| 110 | *-*) |
| 111 | : git describe is older two part flavor |
| 112 | # Recreate the number of commits and rewrite such that the |
| 113 | # result is the same as if we were using the newer version |
| 114 | # of git describe. |
| 115 | vtag=`echo "$v" | sed 's/-.*//'` |
| 116 | numcommits=`git rev-list "$vtag"..HEAD | wc -l` |
| 117 | v=`echo "$v" | sed "s/\(.*\)-\(.*\)/\1-$numcommits-\2/"`; |
| 118 | ;; |
| 119 | esac |
| 120 | |
| 121 | # Change the first '-' to a '.', so version-comparing tools work properly. |
| 122 | # Remove the "g" in git describe's output string, to save a byte. |
| 123 | v=`echo "$v" | sed 's/-/./;s/\(.*\)-g/\1-/'`; |
| 124 | else |
| 125 | v=UNKNOWN |
| 126 | fi |
| 127 | |
| 128 | v=`echo "$v" |sed 's/^v//'` |
| 129 | |
| 130 | # Don't declare a version "dirty" merely because a time stamp has changed. |
| 131 | git status > /dev/null 2>&1 |
| 132 | |
| 133 | dirty=`sh -c 'git diff-index --name-only HEAD' 2>/dev/null` || dirty= |
| 134 | case "$dirty" in |
| 135 | '') ;; |
| 136 | *) # Append the suffix only if there isn't one already. |
| 137 | case $v in |
| 138 | *-dirty) ;; |
| 139 | *) v="$v-dirty" ;; |
| 140 | esac ;; |
| 141 | esac |
| 142 | |
| 143 | # Omit the trailing newline, so that m4_esyscmd can use the result directly. |
| 144 | echo "$v" | tr -d '\012' |
| 145 | |
| 146 | # Local variables: |
| 147 | # eval: (add-hook 'write-file-hooks 'time-stamp) |
| 148 | # time-stamp-start: "scriptversion=" |
| 149 | # time-stamp-format: "%:y-%02m-%02d.%02H" |
| 150 | # time-stamp-end: "$" |
| 151 | # End: |