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      1 #! /bin/sh
      2 # ylwrap - wrapper for lex/yacc invocations.
      3 
      4 scriptversion=2009-04-28.21; # UTC
      5 
      6 # Copyright (C) 1996, 1997, 1998, 1999, 2001, 2002, 2003, 2004, 2005,
      7 # 2007, 2009 Free Software Foundation, Inc.
      8 #
      9 # Written by Tom Tromey <tromey (at] 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 (at] gnu.org> or send patches to
     31 # <automake-patches (at] 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 (at] 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 trap "cd '`pwd`'; rm -rf $dirname > /dev/null 2>&1" 1 2 3 15
    103 mkdir $dirname || exit 1
    104 
    105 cd $dirname
    106 
    107 case $# in
    108   0) "$prog" "$input" ;;
    109   *) "$prog" "$@" "$input" ;;
    110 esac
    111 ret=$?
    112 
    113 if test $ret -eq 0; then
    114   set X $pairlist
    115   shift
    116   first=yes
    117   # Since DOS filename conventions don't allow two dots,
    118   # the DOS version of Bison writes out y_tab.c instead of y.tab.c
    119   # and y_tab.h instead of y.tab.h. Test to see if this is the case.
    120   y_tab_nodot="no"
    121   if test -f y_tab.c || test -f y_tab.h; then
    122     y_tab_nodot="yes"
    123   fi
    124 
    125   # The directory holding the input.
    126   input_dir=`echo "$input" | sed -e 's,\([\\/]\)[^\\/]*$,\1,'`
    127   # Quote $INPUT_DIR so we can use it in a regexp.
    128   # FIXME: really we should care about more than `.' and `\'.
    129   input_rx=`echo "$input_dir" | sed 's,\\\\,\\\\\\\\,g;s,\\.,\\\\.,g'`
    130 
    131   while test "$#" -ne 0; do
    132     from="$1"
    133     # Handle y_tab.c and y_tab.h output by DOS
    134     if test $y_tab_nodot = "yes"; then
    135       if test $from = "y.tab.c"; then
    136     	from="y_tab.c"
    137       else
    138     	if test $from = "y.tab.h"; then
    139     	  from="y_tab.h"
    140     	fi
    141       fi
    142     fi
    143     if test -f "$from"; then
    144       # If $2 is an absolute path name, then just use that,
    145       # otherwise prepend `../'.
    146       case "$2" in
    147     	[\\/]* | ?:[\\/]*) target="$2";;
    148     	*) target="../$2";;
    149       esac
    150 
    151       # We do not want to overwrite a header file if it hasn't
    152       # changed.  This avoid useless recompilations.  However the
    153       # parser itself (the first file) should always be updated,
    154       # because it is the destination of the .y.c rule in the
    155       # Makefile.  Divert the output of all other files to a temporary
    156       # file so we can compare them to existing versions.
    157       if test $first = no; then
    158 	realtarget="$target"
    159 	target="tmp-`echo $target | sed s/.*[\\/]//g`"
    160       fi
    161       # Edit out `#line' or `#' directives.
    162       #
    163       # We don't want the resulting debug information to point at
    164       # an absolute srcdir; it is better for it to just mention the
    165       # .y file with no path.
    166       #
    167       # We want to use the real output file name, not yy.lex.c for
    168       # instance.
    169       #
    170       # We want the include guards to be adjusted too.
    171       FROM=`echo "$from" | sed \
    172             -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\
    173             -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'`
    174       TARGET=`echo "$2" | sed \
    175             -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\
    176             -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'`
    177 
    178       sed -e "/^#/!b" -e "s,$input_rx,," -e "s,$from,$2," \
    179           -e "s,$FROM,$TARGET," "$from" >"$target" || ret=$?
    180 
    181       # Check whether header files must be updated.
    182       if test $first = no; then
    183 	if test -f "$realtarget" && cmp -s "$realtarget" "$target"; then
    184 	  echo "$2" is unchanged
    185 	  rm -f "$target"
    186 	else
    187           echo updating "$2"
    188           mv -f "$target" "$realtarget"
    189         fi
    190       fi
    191     else
    192       # A missing file is only an error for the first file.  This
    193       # is a blatant hack to let us support using "yacc -d".  If -d
    194       # is not specified, we don't want an error when the header
    195       # file is "missing".
    196       if test $first = yes; then
    197         ret=1
    198       fi
    199     fi
    200     shift
    201     shift
    202     first=no
    203   done
    204 else
    205   ret=$?
    206 fi
    207 
    208 # Remove the directory.
    209 cd ..
    210 rm -rf $dirname
    211 
    212 exit $ret
    213 
    214 # Local Variables:
    215 # mode: shell-script
    216 # sh-indentation: 2
    217 # eval: (add-hook 'write-file-hooks 'time-stamp)
    218 # time-stamp-start: "scriptversion="
    219 # time-stamp-format: "%:y-%02m-%02d.%02H"
    220 # time-stamp-time-zone: "UTC"
    221 # time-stamp-end: "; # UTC"
    222 # End:
    223