lib/ylwrap

   1 #! /bin/sh
   2 # ylwrap - wrapper for lex/yacc invocations.
   3
   4 scriptversion=2004-09-10.20
   5
   6 # Copyright (C) 1996, 1997, 1998, 1999, 2001, 2002, 2003, 2004
   7 #   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, write to the Free Software
  23 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  24
  25 # As a special exception to the GNU General Public License, if you
  26 # distribute this file as part of a program that contains a
  27 # configuration script generated by Autoconf, you may include it under
  28 # the same distribution terms that you use for the rest of that program.
  29
  30 # This file is maintained in Automake, please report
  31 # bugs to <bug-automake@gnu.org> or send patches to
  32 # <automake-patches@gnu.org>.
  33
  34 case "$1" in
  35   '')
  36     echo "$0: No files given.  Try \`$0 --help' for more information." 1>&2
  37     exit 1
  38     ;;
  39   --basedir)
  40     basedir=$2
  41     shift 2
  42     ;;
  43   -h|--h*)
  44     cat <<\EOF
  45 Usage: ylwrap [--help|--version] INPUT [OUTPUT DESIRED]... -- PROGRAM [ARGS]...
  46
  47 Wrapper for lex/yacc invocations, renaming files as desired.
  48
  49   INPUT is the input file
  50   OUTPUT is one file PROG generates
  51   DESIRED is the file we actually want instead of OUTPUT
  52   PROGRAM is program to run
  53   ARGS are passed to PROG
  54
  55 Any number of OUTPUT,DESIRED pairs may be used.
  56
  57 Report bugs to <bug-automake@gnu.org>.
  58 EOF
  59     exit 0
  60     ;;
  61   -v|--v*)
  62     echo "ylwrap $scriptversion"
  63     exit 0
  64     ;;
  65 esac
  66
  67
  68 # The input.
  69 input="$1"
  70 shift
  71 case "$input" in
  72   [\\/]* | ?:[\\/]*)
  73     # Absolute path; do nothing.
  74     ;;
  75   *)
  76     # Relative path.  Make it absolute.
  77     input="`pwd`/$input"
  78     ;;
  79 esac
  80
  81 pairlist=
  82 while test "$#" -ne 0; do
  83   if test "$1" = "--"; then
  84     shift
  85     break
  86   fi
  87   pairlist="$pairlist $1"
  88   shift
  89 done
  90
  91 # The program to run.
  92 prog="$1"
  93 shift
  94 # Make any relative path in $prog absolute.
  95 case "$prog" in
  96   [\\/]* | ?:[\\/]*) ;;
  97   *[\\/]*) prog="`pwd`/$prog" ;;
  98 esac
  99
 100 # FIXME: add hostname here for parallel makes that run commands on
 101 # other machines.  But that might take us over the 14-char limit.
 102 dirname=ylwrap$$
 103 trap "cd `pwd`; rm -rf $dirname > /dev/null 2>&1" 1 2 3 15
 104 mkdir $dirname || exit 1
 105
 106 cd $dirname
 107
 108 case $# in
 109   0) $prog "$input" ;;
 110   *) $prog "$@" "$input" ;;
 111 esac
 112 ret=$?
 113
 114 if test $ret -eq 0; then
 115   set X $pairlist
 116   shift
 117   first=yes
 118   # Since DOS filename conventions don't allow two dots,
 119   # the DOS version of Bison writes out y_tab.c instead of y.tab.c
 120   # and y_tab.h instead of y.tab.h. Test to see if this is the case.
 121   y_tab_nodot="no"
 122   if test -f y_tab.c || test -f y_tab.h; then
 123     y_tab_nodot="yes"
 124   fi
 125
 126   # The directory holding the input.
 127   input_dir=`echo "$input" | sed -e 's,\([\\/]\)[^\\/]*$,\1,'`
 128   # Quote $INPUT_DIR so we can use it in a regexp.
 129   # FIXME: really we should care about more than `.' and `\'.
 130   input_rx=`echo "$input_dir" | sed 's,\\\\,\\\\\\\\,g;s,\\.,\\\\.,g'`
 131
 132   while test "$#" -ne 0; do
 133     from="$1"
 134     # Handle y_tab.c and y_tab.h output by DOS
 135     if test $y_tab_nodot = "yes"; then
 136       if test $from = "y.tab.c"; then
 137         from="y_tab.c"
 138       else
 139         if test $from = "y.tab.h"; then
 140           from="y_tab.h"
 141         fi
 142       fi
 143     fi
 144     if test -f "$from"; then
 145       # If $2 is an absolute path name, then just use that,
 146       # otherwise prepend `../'.
 147       case "$2" in
 148         [\\/]* | ?:[\\/]*) target="$2";;
 149         *) target="../$2";;
 150       esac
 151
 152       # We do not want to overwrite a header file if it hasn't
 153       # changed.  This avoid useless recompilations.  However the
 154       # parser itself (the first file) should always be updated,
 155       # because it is the destination of the .y.c rule in the
 156       # Makefile.  Divert the output of all other files to a temporary
 157       # file so we can compare them to existing versions.
 158       if test $first = no; then
 159         realtarget="$target"
 160         target="tmp-`echo $target | sed s/.*[\\/]//g`"
 161       fi
 162       # Edit out `#line' or `#' directives.
 163       #
 164       # We don't want the resulting debug information to point at
 165       # an absolute srcdir; it is better for it to just mention the
 166       # .y file with no path.
 167       #
 168       # We want to use the real output file name, not yy.lex.c for
 169       # instance.
 170       #
 171       # We want the include guards to be adjusted too.
 172       FROM=`echo "$from" | sed \
 173             -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\
 174             -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'`
 175       TARGET=`echo "$2" | sed \
 176             -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\
 177             -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'`
 178
 179       sed -e "/^#/!b" -e "s,$input_rx,," -e "s,$from,$2," \
 180           -e "s,$FROM,$TARGET," "$from" >"$target" || ret=$?
 181
 182       # Check whether header files must be updated.
 183       if test $first = no; then
 184         if test -f "$realtarget" && cmp -s "$realtarget" "$target"; then
 185           echo "$2" is unchanged
 186           rm -f "$target"
 187         else
 188           echo updating "$2"
 189           mv -f "$target" "$realtarget"
 190         fi
 191       fi
 192     else
 193       # A missing file is only an error for the first file.  This
 194       # is a blatant hack to let us support using "yacc -d".  If -d
 195       # is not specified, we don't want an error when the header
 196       # file is "missing".
 197       if test $first = yes; then
 198         ret=1
 199       fi
 200     fi
 201     shift
 202     shift
 203     first=no
 204   done
 205 else
 206   ret=$?
 207 fi
 208
 209 # Remove the directory.
 210 cd ..
 211 rm -rf $dirname
 212
 213 exit $ret
 214
 215 # Local Variables:
 216 # mode: shell-script
 217 # sh-indentation: 2
 218 # eval: (add-hook 'write-file-hooks 'time-stamp)
 219 # time-stamp-start: "scriptversion="
 220 # time-stamp-format: "%:y-%02m-%02d.%02H"
 221 # time-stamp-end: "$"
 222 # End: