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1 #! /bin/sh
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2 # ylwrap - wrapper for lex/yacc invocations.
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3
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4 scriptversion=2005-05-14.22
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5
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6 # Copyright (C) 1996, 1997, 1998, 1999, 2001, 2002, 2003, 2004, 2005
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7 # Free Software Foundation, Inc.
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8 #
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9 # Written by Tom Tromey <tromey@cygnus.com>.
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10 #
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11 # This program is free software; you can redistribute it and/or modify
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12 # it under the terms of the GNU General Public License as published by
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13 # the Free Software Foundation; either version 2, or (at your option)
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14 # any later version.
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15 #
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16 # This program is distributed in the hope that it will be useful,
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17 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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18 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 # GNU General Public License for more details.
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20 #
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21 # You should have received a copy of the GNU General Public License
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22 # along with this program; if not, write to the Free Software
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23 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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24 # 02110-1301, USA.
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25
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26 # As a special exception to the GNU General Public License, if you
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27 # distribute this file as part of a program that contains a
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28 # configuration script generated by Autoconf, you may include it under
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29 # the same distribution terms that you use for the rest of that program.
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30
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31 # This file is maintained in Automake, please report
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32 # bugs to <bug-automake@gnu.org> or send patches to
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33 # <automake-patches@gnu.org>.
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34
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35 case "$1" in
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36 '')
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37 echo "$0: No files given. Try \`$0 --help' for more information." 1>&2
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38 exit 1
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39 ;;
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40 --basedir)
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41 basedir=$2
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42 shift 2
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43 ;;
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44 -h|--h*)
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45 cat <<\EOF
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46 Usage: ylwrap [--help|--version] INPUT [OUTPUT DESIRED]... -- PROGRAM [ARGS]...
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47
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48 Wrapper for lex/yacc invocations, renaming files as desired.
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49
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50 INPUT is the input file
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51 OUTPUT is one file PROG generates
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52 DESIRED is the file we actually want instead of OUTPUT
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53 PROGRAM is program to run
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54 ARGS are passed to PROG
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55
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56 Any number of OUTPUT,DESIRED pairs may be used.
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57
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58 Report bugs to <bug-automake@gnu.org>.
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59 EOF
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60 exit $?
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61 ;;
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62 -v|--v*)
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63 echo "ylwrap $scriptversion"
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64 exit $?
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65 ;;
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66 esac
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67
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68
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69 # The input.
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70 input="$1"
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71 shift
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72 case "$input" in
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73 [\\/]* | ?:[\\/]*)
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74 # Absolute path; do nothing.
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75 ;;
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76 *)
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77 # Relative path. Make it absolute.
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78 input="`pwd`/$input"
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79 ;;
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80 esac
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81
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82 pairlist=
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83 while test "$#" -ne 0; do
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84 if test "$1" = "--"; then
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85 shift
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86 break
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87 fi
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88 pairlist="$pairlist $1"
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89 shift
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90 done
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91
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92 # The program to run.
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93 prog="$1"
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94 shift
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95 # Make any relative path in $prog absolute.
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96 case "$prog" in
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97 [\\/]* | ?:[\\/]*) ;;
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98 *[\\/]*) prog="`pwd`/$prog" ;;
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99 esac
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100
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101 # FIXME: add hostname here for parallel makes that run commands on
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102 # other machines. But that might take us over the 14-char limit.
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103 dirname=ylwrap$$
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104 trap "cd `pwd`; rm -rf $dirname > /dev/null 2>&1" 1 2 3 15
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105 mkdir $dirname || exit 1
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106
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107 cd $dirname
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108
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109 case $# in
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110 0) $prog "$input" ;;
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111 *) $prog "$@" "$input" ;;
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112 esac
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113 ret=$?
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114
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115 if test $ret -eq 0; then
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116 set X $pairlist
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117 shift
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118 first=yes
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119 # Since DOS filename conventions don't allow two dots,
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120 # the DOS version of Bison writes out y_tab.c instead of y.tab.c
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121 # and y_tab.h instead of y.tab.h. Test to see if this is the case.
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122 y_tab_nodot="no"
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123 if test -f y_tab.c || test -f y_tab.h; then
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124 y_tab_nodot="yes"
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125 fi
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126
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127 # The directory holding the input.
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128 input_dir=`echo "$input" | sed -e 's,\([\\/]\)[^\\/]*$,\1,'`
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129 # Quote $INPUT_DIR so we can use it in a regexp.
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130 # FIXME: really we should care about more than `.' and `\'.
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131 input_rx=`echo "$input_dir" | sed 's,\\\\,\\\\\\\\,g;s,\\.,\\\\.,g'`
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132
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133 while test "$#" -ne 0; do
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134 from="$1"
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135 # Handle y_tab.c and y_tab.h output by DOS
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136 if test $y_tab_nodot = "yes"; then
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137 if test $from = "y.tab.c"; then
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138 from="y_tab.c"
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139 else
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140 if test $from = "y.tab.h"; then
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141 from="y_tab.h"
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142 fi
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143 fi
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144 fi
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145 if test -f "$from"; then
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146 # If $2 is an absolute path name, then just use that,
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147 # otherwise prepend `../'.
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148 case "$2" in
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149 [\\/]* | ?:[\\/]*) target="$2";;
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150 *) target="../$2";;
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151 esac
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152
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153 # We do not want to overwrite a header file if it hasn't
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154 # changed. This avoid useless recompilations. However the
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155 # parser itself (the first file) should always be updated,
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156 # because it is the destination of the .y.c rule in the
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157 # Makefile. Divert the output of all other files to a temporary
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158 # file so we can compare them to existing versions.
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159 if test $first = no; then
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160 realtarget="$target"
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161 target="tmp-`echo $target | sed s/.*[\\/]//g`"
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162 fi
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163 # Edit out `#line' or `#' directives.
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164 #
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165 # We don't want the resulting debug information to point at
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166 # an absolute srcdir; it is better for it to just mention the
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167 # .y file with no path.
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168 #
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169 # We want to use the real output file name, not yy.lex.c for
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170 # instance.
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171 #
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172 # We want the include guards to be adjusted too.
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173 FROM=`echo "$from" | sed \
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174 -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\
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175 -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'`
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176 TARGET=`echo "$2" | sed \
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177 -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\
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178 -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'`
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179
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180 sed -e "/^#/!b" -e "s,$input_rx,," -e "s,$from,$2," \
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181 -e "s,$FROM,$TARGET," "$from" >"$target" || ret=$?
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182
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183 # Check whether header files must be updated.
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184 if test $first = no; then
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185 if test -f "$realtarget" && cmp -s "$realtarget" "$target"; then
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186 echo "$2" is unchanged
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187 rm -f "$target"
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188 else
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189 echo updating "$2"
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190 mv -f "$target" "$realtarget"
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191 fi
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192 fi
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193 else
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194 # A missing file is only an error for the first file. This
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195 # is a blatant hack to let us support using "yacc -d". If -d
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196 # is not specified, we don't want an error when the header
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197 # file is "missing".
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198 if test $first = yes; then
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199 ret=1
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200 fi
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201 fi
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202 shift
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203 shift
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204 first=no
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205 done
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206 else
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207 ret=$?
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208 fi
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209
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210 # Remove the directory.
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211 cd ..
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212 rm -rf $dirname
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213
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214 exit $ret
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215
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216 # Local Variables:
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217 # mode: shell-script
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218 # sh-indentation: 2
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219 # eval: (add-hook 'write-file-hooks 'time-stamp)
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220 # time-stamp-start: "scriptversion="
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221 # time-stamp-format: "%:y-%02m-%02d.%02H"
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222 # time-stamp-end: "$"
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223 # End:
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