external/bsd/flex/dist/ylwrap

   1 #! /bin/sh
   2 # ylwrap - wrapper for lex/yacc invocations.
   3
   4 scriptversion=2011-08-25.18; # UTC
   5
   6 # Copyright (C) 1996, 1997, 1998, 1999, 2001, 2002, 2003, 2004, 2005,
   7 # 2007, 2009, 2010, 2011 Free Software Foundation, Inc.
   8 #
   9 # Written by Tom Tromey <tromey@cygnus.com>.
  10 #
  11 # This program is free software; you can redistribute it and/or modify
  12 # it under the terms of the GNU General Public License as published by
  13 # the Free Software Foundation; either version 2, or (at your option)
  14 # any later version.
  15 #
  16 # This program is distributed in the hope that it will be useful,
  17 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 # GNU General Public License for more details.
  20 #
  21 # You should have received a copy of the GNU General Public License
  22 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 # As a special exception to the GNU General Public License, if you
  25 # distribute this file as part of a program that contains a
  26 # configuration script generated by Autoconf, you may include it under
  27 # the same distribution terms that you use for the rest of that program.
  28
  29 # This file is maintained in Automake, please report
  30 # bugs to <bug-automake@gnu.org> or send patches to
  31 # <automake-patches@gnu.org>.
  32
  33 case "$1" in
  34   '')
  35     echo "$0: No files given.  Try \`$0 --help' for more information." 1>&2
  36     exit 1
  37     ;;
  38   --basedir)
  39     basedir=$2
  40     shift 2
  41     ;;
  42   -h|--h*)
  43     cat <<\EOF
  44 Usage: ylwrap [--help|--version] INPUT [OUTPUT DESIRED]... -- PROGRAM [ARGS]...
  45
  46 Wrapper for lex/yacc invocations, renaming files as desired.
  47
  48   INPUT is the input file
  49   OUTPUT is one file PROG generates
  50   DESIRED is the file we actually want instead of OUTPUT
  51   PROGRAM is program to run
  52   ARGS are passed to PROG
  53
  54 Any number of OUTPUT,DESIRED pairs may be used.
  55
  56 Report bugs to <bug-automake@gnu.org>.
  57 EOF
  58     exit $?
  59     ;;
  60   -v|--v*)
  61     echo "ylwrap $scriptversion"
  62     exit $?
  63     ;;
  64 esac
  65
  66
  67 # The input.
  68 input="$1"
  69 shift
  70 case "$input" in
  71   [\\/]* | ?:[\\/]*)
  72     # Absolute path; do nothing.
  73     ;;
  74   *)
  75     # Relative path.  Make it absolute.
  76     input="`pwd`/$input"
  77     ;;
  78 esac
  79
  80 pairlist=
  81 while test "$#" -ne 0; do
  82   if test "$1" = "--"; then
  83     shift
  84     break
  85   fi
  86   pairlist="$pairlist $1"
  87   shift
  88 done
  89
  90 # The program to run.
  91 prog="$1"
  92 shift
  93 # Make any relative path in $prog absolute.
  94 case "$prog" in
  95   [\\/]* | ?:[\\/]*) ;;
  96   *[\\/]*) prog="`pwd`/$prog" ;;
  97 esac
  98
  99 # FIXME: add hostname here for parallel makes that run commands on
 100 # other machines.  But that might take us over the 14-char limit.
 101 dirname=ylwrap$$
 102 do_exit="cd '`pwd`' && rm -rf $dirname > /dev/null 2>&1;"' (exit $ret); exit $ret'
 103 trap "ret=129; $do_exit" 1
 104 trap "ret=130; $do_exit" 2
 105 trap "ret=141; $do_exit" 13
 106 trap "ret=143; $do_exit" 15
 107 mkdir $dirname || exit 1
 108
 109 cd $dirname
 110
 111 case $# in
 112   0) "$prog" "$input" ;;
 113   *) "$prog" "$@" "$input" ;;
 114 esac
 115 ret=$?
 116
 117 if test $ret -eq 0; then
 118   set X $pairlist
 119   shift
 120   first=yes
 121   # Since DOS filename conventions don't allow two dots,
 122   # the DOS version of Bison writes out y_tab.c instead of y.tab.c
 123   # and y_tab.h instead of y.tab.h. Test to see if this is the case.
 124   y_tab_nodot="no"
 125   if test -f y_tab.c || test -f y_tab.h; then
 126     y_tab_nodot="yes"
 127   fi
 128
 129   # The directory holding the input.
 130   input_dir=`echo "$input" | sed -e 's,\([\\/]\)[^\\/]*$,\1,'`
 131   # Quote $INPUT_DIR so we can use it in a regexp.
 132   # FIXME: really we should care about more than `.' and `\'.
 133   input_rx=`echo "$input_dir" | sed 's,\\\\,\\\\\\\\,g;s,\\.,\\\\.,g'`
 134
 135   while test "$#" -ne 0; do
 136     from="$1"
 137     # Handle y_tab.c and y_tab.h output by DOS
 138     if test $y_tab_nodot = "yes"; then
 139       if test $from = "y.tab.c"; then
 140         from="y_tab.c"
 141       else
 142         if test $from = "y.tab.h"; then
 143           from="y_tab.h"
 144         fi
 145       fi
 146     fi
 147     if test -f "$from"; then
 148       # If $2 is an absolute path name, then just use that,
 149       # otherwise prepend `../'.
 150       case "$2" in
 151         [\\/]* | ?:[\\/]*) target="$2";;
 152         *) target="../$2";;
 153       esac
 154
 155       # We do not want to overwrite a header file if it hasn't
 156       # changed.  This avoid useless recompilations.  However the
 157       # parser itself (the first file) should always be updated,
 158       # because it is the destination of the .y.c rule in the
 159       # Makefile.  Divert the output of all other files to a temporary
 160       # file so we can compare them to existing versions.
 161       if test $first = no; then
 162         realtarget="$target"
 163         target="tmp-`echo $target | sed s/.*[\\/]//g`"
 164       fi
 165       # Edit out `#line' or `#' directives.
 166       #
 167       # We don't want the resulting debug information to point at
 168       # an absolute srcdir; it is better for it to just mention the
 169       # .y file with no path.
 170       #
 171       # We want to use the real output file name, not yy.lex.c for
 172       # instance.
 173       #
 174       # We want the include guards to be adjusted too.
 175       FROM=`echo "$from" | sed \
 176             -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\
 177             -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'`
 178       TARGET=`echo "$2" | sed \
 179             -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\
 180             -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'`
 181
 182       sed -e "/^#/!b" -e "s,$input_rx,," -e "s,$from,$2," \
 183           -e "s,$FROM,$TARGET," "$from" >"$target" || ret=$?
 184
 185       # Check whether header files must be updated.
 186       if test $first = no; then
 187         if test -f "$realtarget" && cmp -s "$realtarget" "$target"; then
 188           echo "$2" is unchanged
 189           rm -f "$target"
 190         else
 191           echo updating "$2"
 192           mv -f "$target" "$realtarget"
 193         fi
 194       fi
 195     else
 196       # A missing file is only an error for the first file.  This
 197       # is a blatant hack to let us support using "yacc -d".  If -d
 198       # is not specified, we don't want an error when the header
 199       # file is "missing".
 200       if test $first = yes; then
 201         ret=1
 202       fi
 203     fi
 204     shift
 205     shift
 206     first=no
 207   done
 208 else
 209   ret=$?
 210 fi
 211
 212 # Remove the directory.
 213 cd ..
 214 rm -rf $dirname
 215
 216 exit $ret
 217
 218 # Local Variables:
 219 # mode: shell-script
 220 # sh-indentation: 2
 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: "UTC"
 225 # time-stamp-end: "; # UTC"
 226 # End: