Annotation of embedaddon/mtr/build-aux/git-version-gen, revision 1.1.1.1
1.1 misho 1: #!/bin/sh
2: # Print a version string.
3: scriptversion=2016-05-08.18; # UTC
4:
5: # Copyright (C) 2007-2016 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$v_from_git" != x; then
203: # Don't declare a version "dirty" merely because a time stamp has changed.
204: git update-index --refresh > /dev/null 2>&1
205:
206: dirty=`exec 2>/dev/null;git diff-index --name-only HEAD` || dirty=
207: case "$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:
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