ylwrap

   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@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 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: