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1 | #!/bin/sh |
2 | # Print a version string. | |
3 | scriptversion=2017-01-09.19; # UTC | |
4 | ||
5 | # Copyright (C) 2007-2017 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 | # As with any generated file in a VC'd directory, you should add | |
48 | # /.version to .gitignore, so that you don't accidentally commit it. | |
49 | # .tarball-version is never generated in a VC'd directory, so needn't | |
50 | # be listed there. | |
51 | # | |
52 | # Use the following line in your configure.ac, so that $(VERSION) will | |
53 | # automatically be up-to-date each time configure is run (and note that | |
54 | # since configure.ac no longer includes a version string, Makefile rules | |
55 | # should not depend on configure.ac for version updates). | |
56 | # | |
57 | # AC_INIT([GNU project], | |
58 | # m4_esyscmd([build-aux/git-version-gen .tarball-version]), | |
59 | # [bug-project@example]) | |
60 | # | |
61 | # Then use the following lines in your Makefile.am, so that .version | |
62 | # will be present for dependencies, and so that .version and | |
63 | # .tarball-version will exist in distribution tarballs. | |
64 | # | |
65 | # EXTRA_DIST = $(top_srcdir)/.version | |
66 | # BUILT_SOURCES = $(top_srcdir)/.version | |
67 | # $(top_srcdir)/.version: | |
68 | # echo $(VERSION) > $@-t && mv $@-t $@ | |
69 | # dist-hook: | |
70 | # echo $(VERSION) > $(distdir)/.tarball-version | |
71 | ||
72 | ||
73 | me=$0 | |
74 | ||
75 | version="git-version-gen $scriptversion | |
76 | ||
77 | Copyright 2011 Free Software Foundation, Inc. | |
78 | There is NO warranty. You may redistribute this software | |
79 | under the terms of the GNU General Public License. | |
80 | For more information about these matters, see the files named COPYING." | |
81 | ||
82 | usage="\ | |
83 | Usage: $me [OPTION]... \$srcdir/.tarball-version [TAG-NORMALIZATION-SED-SCRIPT] | |
84 | Print a version string. | |
85 | ||
86 | Options: | |
87 | ||
88 | --prefix PREFIX prefix of git tags (default 'v') | |
89 | --fallback VERSION | |
90 | fallback version to use if \"git --version\" fails | |
91 | ||
92 | --help display this help and exit | |
93 | --version output version information and exit | |
94 | ||
95 | Running without arguments will suffice in most cases." | |
96 | ||
97 | prefix=v | |
98 | fallback= | |
99 | ||
100 | while test $# -gt 0; do | |
101 | case $1 in | |
102 | --help) echo "$usage"; exit 0;; | |
103 | --version) echo "$version"; exit 0;; | |
104 | --prefix) shift; prefix=${1?};; | |
105 | --fallback) shift; fallback=${1?};; | |
106 | -*) | |
107 | echo "$0: Unknown option '$1'." >&2 | |
108 | echo "$0: Try '--help' for more information." >&2 | |
109 | exit 1;; | |
110 | *) | |
111 | if test "x$tarball_version_file" = x; then | |
112 | tarball_version_file="$1" | |
113 | elif test "x$tag_sed_script" = x; then | |
114 | tag_sed_script="$1" | |
115 | else | |
116 | echo "$0: extra non-option argument '$1'." >&2 | |
117 | exit 1 | |
118 | fi;; | |
119 | esac | |
120 | shift | |
121 | done | |
122 | ||
123 | if test "x$tarball_version_file" = x; then | |
124 | echo "$usage" | |
125 | exit 1 | |
126 | fi | |
127 | ||
128 | tag_sed_script="${tag_sed_script:-s/x/x/}" | |
129 | ||
130 | nl=' | |
131 | ' | |
132 | ||
133 | # Avoid meddling by environment variable of the same name. | |
134 | v= | |
135 | v_from_git= | |
136 | ||
137 | # First see if there is a tarball-only version file. | |
138 | # then try "git describe", then default. | |
139 | if test -f $tarball_version_file | |
140 | then | |
141 | v=`cat $tarball_version_file` || v= | |
142 | case $v in | |
143 | *$nl*) v= ;; # reject multi-line output | |
144 | [0-9]*) ;; | |
145 | *) v= ;; | |
146 | esac | |
147 | test "x$v" = x \ | |
148 | && echo "$0: WARNING: $tarball_version_file is missing or damaged" 1>&2 | |
149 | fi | |
150 | ||
151 | if test "x$v" != x | |
152 | then | |
153 | : # use $v | |
154 | # Otherwise, if there is at least one git commit involving the working | |
155 | # directory, and "git describe" output looks sensible, use that to | |
156 | # derive a version string. | |
157 | elif test "`git log -1 --pretty=format:x . 2>&1`" = x \ | |
158 | && v=`git describe --abbrev=4 --match="$prefix*" HEAD 2>/dev/null \ | |
159 | || git describe --abbrev=4 HEAD 2>/dev/null` \ | |
160 | && v=`printf '%s\n' "$v" | sed "$tag_sed_script"` \ | |
161 | && case $v in | |
162 | $prefix[0-9]*) ;; | |
163 | *) (exit 1) ;; | |
164 | esac | |
165 | then | |
166 | # Is this a new git that lists number of commits since the last | |
167 | # tag or the previous older version that did not? | |
168 | # Newer: v6.10-77-g0f8faeb | |
169 | # Older: v6.10-g0f8faeb | |
170 | case $v in | |
171 | *-*-*) : git describe is okay three part flavor ;; | |
172 | *-*) | |
173 | : git describe is older two part flavor | |
174 | # Recreate the number of commits and rewrite such that the | |
175 | # result is the same as if we were using the newer version | |
176 | # of git describe. | |
177 | vtag=`echo "$v" | sed 's/-.*//'` | |
178 | commit_list=`git rev-list "$vtag"..HEAD 2>/dev/null` \ | |
179 | || { commit_list=failed; | |
180 | echo "$0: WARNING: git rev-list failed" 1>&2; } | |
181 | numcommits=`echo "$commit_list" | wc -l` | |
182 | v=`echo "$v" | sed "s/\(.*\)-\(.*\)/\1-$numcommits-\2/"`; | |
183 | test "$commit_list" = failed && v=UNKNOWN | |
184 | ;; | |
185 | esac | |
186 | ||
187 | # Change the first '-' to a '.', so version-comparing tools work properly. | |
188 | # Remove the "g" in git describe's output string, to save a byte. | |
189 | v=`echo "$v" | sed 's/-/./;s/\(.*\)-g/\1-/'`; | |
190 | v_from_git=1 | |
191 | elif test "x$fallback" = x || git --version >/dev/null 2>&1; then | |
192 | v=UNKNOWN | |
193 | else | |
194 | v=$fallback | |
195 | fi | |
196 | ||
197 | v=`echo "$v" |sed "s/^$prefix//"` | |
198 | ||
199 | # Test whether to append the "-dirty" suffix only if the version | |
200 | # string we're using came from git. I.e., skip the test if it's "UNKNOWN" | |
201 | # or if it came from .tarball-version. | |
202 | if test "x$v_from_git" != x; then | |
203 | # Don't declare a version "dirty" merely because a timestamp has changed. | |
204 | git update-index --refresh > /dev/null 2>&1 | |
205 | ||
206 | dirty=`exec 2>/dev/null;git diff-index --name-only HEAD` || dirty= | |
207 | case "$dirty" in | |
208 | '') ;; | |
209 | *) # Append the suffix only if there isn't one already. | |
210 | case $v in | |
211 | *-dirty) ;; | |
212 | *) v="$v-dirty" ;; | |
213 | esac ;; | |
214 | esac | |
215 | fi | |
216 | ||
217 | # Omit the trailing newline, so that m4_esyscmd can use the result directly. | |
218 | printf %s "$v" | |
219 | ||
220 | # Local variables: | |
221 | # eval: (add-hook 'write-file-hooks 'time-stamp) | |
222 | # time-stamp-start: "scriptversion=" | |
223 | # time-stamp-format: "%:y-%02m-%02d.%02H" | |
224 | # time-stamp-time-zone: "UTC0" | |
225 | # time-stamp-end: "; # UTC" | |
226 | # End: |