Mercurial > gnulib
annotate build-aux/git-version-gen @ 16706:bd179cf2c9ea
git-version-gen: don't let "prefix" envvar cause trouble
* build-aux/git-version-gen (prefix): Initialize properly,
so as not to use a value specified via the environment.
Details here: http://thread.gmane.org/gmane.comp.gnu.parted.bugs/10810
author | Andreas Oberritter <obi@opendreambox.org> |
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date | Sun, 18 Mar 2012 18:39:14 +0100 |
parents | f9b906545e2f |
children | 179b150e5256 |
rev | line source |
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* build-aux/git-version-gen: New file, from coreutils. For details, see
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1 #!/bin/sh |
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2 # Print a version string. |
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3 scriptversion=2012-03-18.17; # UTC |
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4 |
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5 # Copyright (C) 2007-2012 Free Software Foundation, Inc. |
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6 # |
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7 # This program is free software: you can redistribute it and/or modify |
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8 # it under the terms of the GNU General Public License as published by |
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9 # the Free Software Foundation; either version 3 of the License, or |
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10 # (at your option) any later version. |
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11 # |
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12 # This program is distributed in the hope that it will be useful, |
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 # GNU General Public License for more details. |
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16 # |
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17 # You should have received a copy of the GNU General Public License |
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>. |
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19 |
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20 # This script is derived from GIT-VERSION-GEN from GIT: http://git.or.cz/. |
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21 # It may be run two ways: |
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22 # - from a git repository in which the "git describe" command below |
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23 # produces useful output (thus requiring at least one signed tag) |
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24 # - from a non-git-repo directory containing a .tarball-version file, which |
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25 # presumes this script is invoked like "./git-version-gen .tarball-version". |
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26 |
9869 | 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 # | |
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47 # As with any generated file in a VC'd directory, you should add |
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48 # /.version to .gitignore, so that you don't accidentally commit it. |
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49 # .tarball-version is never generated in a VC'd directory, so needn't |
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50 # be listed there. |
9869 | 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 | |
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62 # will be present for dependencies, and so that .version and |
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63 # .tarball-version will exist in distribution tarballs. |
9869 | 64 # |
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65 # EXTRA_DIST = $(top_srcdir)/.version |
9869 | 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 | |
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72 |
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73 me=$0 |
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74 |
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75 version="git-version-gen $scriptversion |
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76 |
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77 Copyright 2011 Free Software Foundation, Inc. |
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78 There is NO warranty. You may redistribute this software |
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79 under the terms of the GNU General Public License. |
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80 For more information about these matters, see the files named COPYING." |
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81 |
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82 usage="\ |
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83 Usage: $me [OPTION]... \$srcdir/.tarball-version [TAG-NORMALIZATION-SED-SCRIPT] |
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84 Print a version string. |
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85 |
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86 Options: |
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87 |
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88 --prefix prefix of git tags (default 'v') |
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89 |
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90 --help display this help and exit |
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91 --version output version information and exit |
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92 |
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93 Running without arguments will suffice in most cases." |
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94 |
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95 prefix=v |
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96 |
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97 while test $# -gt 0; do |
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98 case $1 in |
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99 --help) echo "$usage"; exit 0;; |
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100 --version) echo "$version"; exit 0;; |
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101 --prefix) shift; prefix="$1";; |
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102 -*) |
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103 echo "$0: Unknown option '$1'." >&2 |
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104 echo "$0: Try '--help' for more information." >&2 |
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105 exit 1;; |
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106 *) |
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107 if test -z "$tarball_version_file"; then |
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108 tarball_version_file="$1" |
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109 elif test -z "$tag_sed_script"; then |
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110 tag_sed_script="$1" |
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111 else |
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112 echo "$0: extra non-option argument '$1'." >&2 |
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113 exit 1 |
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114 fi;; |
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115 esac |
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116 shift |
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117 done |
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118 |
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119 if test -z "$tarball_version_file"; then |
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120 echo "$usage" |
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121 exit 1 |
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122 fi |
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123 |
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124 tag_sed_script="${tag_sed_script:-s/x/x/}" |
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125 |
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126 nl=' |
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127 ' |
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128 |
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129 # Avoid meddling by environment variable of the same name. |
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130 v= |
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131 v_from_git= |
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132 |
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133 # First see if there is a tarball-only version file. |
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134 # then try "git describe", then default. |
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135 if test -f $tarball_version_file |
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136 then |
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137 v=`cat $tarball_version_file` || v= |
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138 case $v in |
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139 *$nl*) v= ;; # reject multi-line output |
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140 [0-9]*) ;; |
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141 *) v= ;; |
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142 esac |
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143 test -z "$v" \ |
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144 && echo "$0: WARNING: $tarball_version_file is missing or damaged" 1>&2 |
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145 fi |
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146 |
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147 if test -n "$v" |
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148 then |
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149 : # use $v |
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150 # Otherwise, if there is at least one git commit involving the working |
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151 # directory, and "git describe" output looks sensible, use that to |
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152 # derive a version string. |
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153 elif test "`git log -1 --pretty=format:x . 2>&1`" = x \ |
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154 && v=`git describe --abbrev=4 --match="$prefix*" HEAD 2>/dev/null \ |
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155 || git describe --abbrev=4 HEAD 2>/dev/null` \ |
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156 && v=`printf '%s\n' "$v" | sed "$tag_sed_script"` \ |
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157 && case $v in |
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158 $prefix[0-9]*) ;; |
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159 *) (exit 1) ;; |
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160 esac |
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161 then |
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162 # Is this a new git that lists number of commits since the last |
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163 # tag or the previous older version that did not? |
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164 # Newer: v6.10-77-g0f8faeb |
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165 # Older: v6.10-g0f8faeb |
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166 case $v in |
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167 *-*-*) : git describe is okay three part flavor ;; |
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168 *-*) |
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169 : git describe is older two part flavor |
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170 # Recreate the number of commits and rewrite such that the |
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171 # result is the same as if we were using the newer version |
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172 # of git describe. |
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173 vtag=`echo "$v" | sed 's/-.*//'` |
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174 commit_list=`git rev-list "$vtag"..HEAD 2>/dev/null` \ |
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175 || { commit_list=failed; |
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176 echo "$0: WARNING: git rev-list failed" 1>&2; } |
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177 numcommits=`echo "$commit_list" | wc -l` |
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178 v=`echo "$v" | sed "s/\(.*\)-\(.*\)/\1-$numcommits-\2/"`; |
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179 test "$commit_list" = failed && v=UNKNOWN |
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180 ;; |
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181 esac |
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182 |
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183 # Change the first '-' to a '.', so version-comparing tools work properly. |
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184 # Remove the "g" in git describe's output string, to save a byte. |
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185 v=`echo "$v" | sed 's/-/./;s/\(.*\)-g/\1-/'`; |
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186 v_from_git=1 |
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187 else |
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188 v=UNKNOWN |
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189 fi |
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190 |
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191 v=`echo "$v" |sed "s/^$prefix//"` |
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192 |
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193 # Test whether to append the "-dirty" suffix only if the version |
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194 # string we're using came from git. I.e., skip the test if it's "UNKNOWN" |
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195 # or if it came from .tarball-version. |
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196 if test -n "$v_from_git"; then |
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197 # Don't declare a version "dirty" merely because a time stamp has changed. |
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198 git update-index --refresh > /dev/null 2>&1 |
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199 |
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200 dirty=`exec 2>/dev/null;git diff-index --name-only HEAD` || dirty= |
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201 case "$dirty" in |
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202 '') ;; |
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203 *) # Append the suffix only if there isn't one already. |
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204 case $v in |
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205 *-dirty) ;; |
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206 *) v="$v-dirty" ;; |
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207 esac ;; |
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208 esac |
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209 fi |
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210 |
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211 # Omit the trailing newline, so that m4_esyscmd can use the result directly. |
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212 echo "$v" | tr -d "$nl" |
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213 |
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214 # Local variables: |
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215 # eval: (add-hook 'write-file-hooks 'time-stamp) |
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216 # time-stamp-start: "scriptversion=" |
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217 # time-stamp-format: "%:y-%02m-%02d.%02H" |
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218 # time-stamp-time-zone: "UTC" |
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219 # time-stamp-end: "; # UTC" |
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220 # End: |