1 #! /bin/sh

     2 # ylwrap - wrapper for lex/yacc invocations.

     3 

     4 scriptversion=2005-05-14.22

     5 

     6 # Copyright (C) 1996, 1997, 1998, 1999, 2001, 2002, 2003, 2004, 2005

     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., 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: