ylwrap

   1 #! /bin/sh
   2 # ylwrap - wrapper for lex/yacc invocations.
   3
   4 scriptversion=2007-11-22.22
   5
   6 # Copyright (C) 1996, 1997, 1998, 1999, 2001, 2002, 2003, 2004, 2005,
   7 # 2007  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., 51 Franklin Street, Fifth Floor, Boston, MA
  24 # 02110-1301, USA.
  25
  26 # As a special exception to the GNU General Public License, if you
  27 # distribute this file as part of a program that contains a
  28 # configuration script generated by Autoconf, you may include it under
  29 # the same distribution terms that you use for the rest of that program.
  30
  31 # This file is maintained in Automake, please report
  32 # bugs to <bug-automake@gnu.org> or send patches to
  33 # <automake-patches@gnu.org>.
  34
  35 case "$1" in
  36   '')
  37     echo "$0: No files given.  Try \`$0 --help' for more information." 1>&2
  38     exit 1
  39     ;;
  40   --basedir)
  41     basedir=$2
  42     shift 2
  43     ;;
  44   -h|--h*)
  45     cat <<\EOF
  46 Usage: ylwrap [--help|--version] INPUT [OUTPUT DESIRED]... -- PROGRAM [ARGS]...
  47
  48 Wrapper for lex/yacc invocations, renaming files as desired.
  49
  50   INPUT is the input file
  51   OUTPUT is one file PROG generates
  52   DESIRED is the file we actually want instead of OUTPUT
  53   PROGRAM is program to run
  54   ARGS are passed to PROG
  55
  56 Any number of OUTPUT,DESIRED pairs may be used.
  57
  58 Report bugs to <bug-automake@gnu.org>.
  59 EOF
  60     exit $?
  61     ;;
  62   -v|--v*)
  63     echo "ylwrap $scriptversion"
  64     exit $?
  65     ;;
  66 esac
  67
  68
  69 # The input.
  70 input="$1"
  71 shift
  72 case "$input" in
  73   [\\/]* | ?:[\\/]*)
  74     # Absolute path; do nothing.
  75     ;;
  76   *)
  77     # Relative path.  Make it absolute.
  78     input="`pwd`/$input"
  79     ;;
  80 esac
  81
  82 pairlist=
  83 while test "$#" -ne 0; do
  84   if test "$1" = "--"; then
  85     shift
  86     break
  87   fi
  88   pairlist="$pairlist $1"
  89   shift
  90 done
  91
  92 # The program to run.
  93 prog="$1"
  94 shift
  95 # Make any relative path in $prog absolute.
  96 case "$prog" in
  97   [\\/]* | ?:[\\/]*) ;;
  98   *[\\/]*) prog="`pwd`/$prog" ;;
  99 esac
 100
 101 # FIXME: add hostname here for parallel makes that run commands on
 102 # other machines.  But that might take us over the 14-char limit.
 103 dirname=ylwrap$$
 104 trap "cd '`pwd`'; rm -rf $dirname > /dev/null 2>&1" 1 2 3 15
 105 mkdir $dirname || exit 1
 106
 107 cd $dirname
 108
 109 case $# in
 110   0) "$prog" "$input" ;;
 111   *) "$prog" "$@" "$input" ;;
 112 esac
 113 ret=$?
 114
 115 if test $ret -eq 0; then
 116   set X $pairlist
 117   shift
 118   first=yes
 119   # Since DOS filename conventions don't allow two dots,
 120   # the DOS version of Bison writes out y_tab.c instead of y.tab.c
 121   # and y_tab.h instead of y.tab.h. Test to see if this is the case.
 122   y_tab_nodot="no"
 123   if test -f y_tab.c || test -f y_tab.h; then
 124     y_tab_nodot="yes"
 125   fi
 126
 127   # The directory holding the input.
 128   input_dir=`echo "$input" | sed -e 's,\([\\/]\)[^\\/]*$,\1,'`
 129   # Quote $INPUT_DIR so we can use it in a regexp.
 130   # FIXME: really we should care about more than `.' and `\'.
 131   input_rx=`echo "$input_dir" | sed 's,\\\\,\\\\\\\\,g;s,\\.,\\\\.,g'`
 132
 133   while test "$#" -ne 0; do
 134     from="$1"
 135     # Handle y_tab.c and y_tab.h output by DOS
 136     if test $y_tab_nodot = "yes"; then
 137       if test $from = "y.tab.c"; then
 138         from="y_tab.c"
 139       else
 140         if test $from = "y.tab.h"; then
 141           from="y_tab.h"
 142         fi
 143       fi
 144     fi
 145     if test -f "$from"; then
 146       # If $2 is an absolute path name, then just use that,
 147       # otherwise prepend `../'.
 148       case "$2" in
 149         [\\/]* | ?:[\\/]*) target="$2";;
 150         *) target="../$2";;
 151       esac
 152
 153       # We do not want to overwrite a header file if it hasn't
 154       # changed.  This avoid useless recompilations.  However the
 155       # parser itself (the first file) should always be updated,
 156       # because it is the destination of the .y.c rule in the
 157       # Makefile.  Divert the output of all other files to a temporary
 158       # file so we can compare them to existing versions.
 159       if test $first = no; then
 160         realtarget="$target"
 161         target="tmp-`echo $target | sed s/.*[\\/]//g`"
 162       fi
 163       # Edit out `#line' or `#' directives.
 164       #
 165       # We don't want the resulting debug information to point at
 166       # an absolute srcdir; it is better for it to just mention the
 167       # .y file with no path.
 168       #
 169       # We want to use the real output file name, not yy.lex.c for
 170       # instance.
 171       #
 172       # We want the include guards to be adjusted too.
 173       FROM=`echo "$from" | sed \
 174             -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\
 175             -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'`
 176       TARGET=`echo "$2" | sed \
 177             -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\
 178             -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'`
 179
 180       sed -e "/^#/!b" -e "s,$input_rx,," -e "s,$from,$2," \
 181           -e "s,$FROM,$TARGET," "$from" >"$target" || ret=$?
 182
 183       # Check whether header files must be updated.
 184       if test $first = no; then
 185         if test -f "$realtarget" && cmp -s "$realtarget" "$target"; then
 186           echo "$2" is unchanged
 187           rm -f "$target"
 188         else
 189           echo updating "$2"
 190           mv -f "$target" "$realtarget"
 191         fi
 192       fi
 193     else
 194       # A missing file is only an error for the first file.  This
 195       # is a blatant hack to let us support using "yacc -d".  If -d
 196       # is not specified, we don't want an error when the header
 197       # file is "missing".
 198       if test $first = yes; then
 199         ret=1
 200       fi
 201     fi
 202     shift
 203     shift
 204     first=no
 205   done
 206 else
 207   ret=$?
 208 fi
 209
 210 # Remove the directory.
 211 cd ..
 212 rm -rf $dirname
 213
 214 exit $ret
 215
 216 # Local Variables:
 217 # mode: shell-script
 218 # sh-indentation: 2
 219 # eval: (add-hook 'write-file-hooks 'time-stamp)
 220 # time-stamp-start: "scriptversion="
 221 # time-stamp-format: "%:y-%02m-%02d.%02H"
 222 # time-stamp-end: "$"
 223 # End: