introspect: rearrange order of functions a bit
[pulseaudio-mirror.git] / git-version-gen
blobae3988ea16490910d63a0a0b70b8148a2e4d8389
1 #!/bin/sh
2 # Print a version string.
3 scriptversion=2008-04-08.07
5 # Copyright (C) 2007-2008 Free Software Foundation
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.
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.
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.
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 .tarball-version file, which
27 # presumes this script is invoked like "./git-version-gen .tarball-version".
29 # In order to use intra-version strings in your project, you will need two
30 # separate generated version string files:
32 # .tarball-version - present only in a distribution tarball, and not in
33 # a checked-out repository. Created with contents that were learned at
34 # the last time autoconf was run, and used by git-version-gen. Must not
35 # be present in either $(srcdir) or $(builddir) for git-version-gen to
36 # give accurate answers during normal development with a checked out tree,
37 # but must be present in a tarball when there is no version control system.
38 # Therefore, it cannot be used in any dependencies. GNUmakefile has
39 # hooks to force a reconfigure at distribution time to get the value
40 # correct, without penalizing normal development with extra reconfigures.
42 # .version - present in a checked-out repository and in a distribution
43 # tarball. Usable in dependencies, particularly for files that don't
44 # want to depend on config.h but do want to track version changes.
45 # Delete this file prior to any autoconf run where you want to rebuild
46 # files to pick up a version string change; and leave it stale to
47 # minimize rebuild time after unrelated changes to configure sources.
49 # It is probably wise to add these two files to .gitignore, so that you
50 # don't accidentally commit either generated file.
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).
57 # AC_INIT([GNU project],
58 # m4_esyscmd([build-aux/git-version-gen .tarball-version]),
59 # [bug-project@example])
61 # Then use the following lines in your Makefile.am, so that .version
62 # will be present for dependencies, and so that .tarball-version will
63 # exist in distribution tarballs.
65 # BUILT_SOURCES = $(top_srcdir)/.version
66 # $(top_srcdir)/.version:
67 # echo $(VERSION) > $@-t && mv $@-t $@
68 # dist-hook:
69 # echo $(VERSION) > $(distdir)/.tarball-version
71 case $# in
72 1) ;;
73 *) echo 1>&2 "Usage: $0 \$srcdir/.tarball-version"; exit 1;;
74 esac
76 tarball_version_file=$1
77 nl='
80 # First see if there is a tarball-only version file.
81 # then try "git describe", then default.
82 if test -f $tarball_version_file
83 then
84 v=`cat $tarball_version_file` || exit 1
85 case $v in
86 *$nl*) v= ;; # reject multi-line output
87 [0-9]*) ;;
88 *) v= ;;
89 esac
90 test -z "$v" \
91 && echo "$0: WARNING: $tarball_version_file seems to be damaged" 1>&2
94 if test -n "$v"
95 then
96 : # use $v
97 elif test -d .git \
98 && v=`git describe --abbrev=4 --match='v*' HEAD 2>/dev/null \
99 || git describe --abbrev=4 HEAD 2>/dev/null` \
100 && case $v in
101 v[0-9]*) ;;
102 *) (exit 1) ;;
103 esac
104 then
105 # Is this a new git that lists number of commits since the last
106 # tag or the previous older version that did not?
107 # Newer: v6.10-77-g0f8faeb
108 # Older: v6.10-g0f8faeb
109 # case $v in
110 # *-*-*) : git describe is okay three part flavor ;;
111 # *-*)
112 # : git describe is older two part flavor
113 # # Recreate the number of commits and rewrite such that the
114 # # result is the same as if we were using the newer version
115 # # of git describe.
116 # vtag=`echo "$v" | sed 's/-.*//'`
117 # numcommits=`git rev-list "$vtag"..HEAD | wc -l`
118 # v=`echo "$v" | sed "s/\(.*\)-\(.*\)/\1-$numcommits-\2/"`;
119 # ;;
120 # esac
122 # Change the first '-' to a '.', so version-comparing tools work properly.
123 # Remove the "g" in git describe's output string, to save a byte.
124 # v=`echo "$v" | sed 's/-/./;s/\(.*\)-g/\1-/'`;
126 else
127 v=UNKNOWN
130 v=`echo "$v" |sed 's/^v//'`
132 # Don't declare a version "dirty" merely because a time stamp has changed.
133 git status > /dev/null 2>&1
135 dirty=`sh -c 'git diff-index --name-only HEAD' 2>/dev/null` || dirty=
136 case "$dirty" in
137 '') ;;
138 *) # Append the suffix only if there isn't one already.
139 case $v in
140 *-dirty) ;;
141 *) v="$v-dirty" ;;
142 esac ;;
143 esac
145 # Omit the trailing newline, so that m4_esyscmd can use the result directly.
146 echo "$v" | tr -d '\012'
148 # Local variables:
149 # eval: (add-hook 'write-file-hooks 'time-stamp)
150 # time-stamp-start: "scriptversion="
151 # time-stamp-format: "%:y-%02m-%02d.%02H"
152 # time-stamp-end: "$"
153 # End: