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#! /bin/sh

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# ylwrap - wrapper for lex/yacc invocations.

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scriptversion=2005-05-14.22

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

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#   Free Software Foundation, Inc.

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#

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# Written by Tom Tromey <tromey@cygnus.com>.

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#

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# This program is free software; you can redistribute it and/or modify

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# it under the terms of the GNU General Public License as published by

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# the Free Software Foundation; either version 2, or (at your option)

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# any later version.

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#

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# This program is distributed in the hope that it will be useful,

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# but WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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# GNU General Public License for more details.

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#

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# You should have received a copy of the GNU General Public License

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# along with this program; if not, write to the Free Software

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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

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# 02110-1301, USA.

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# As a special exception to the GNU General Public License, if you

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# distribute this file as part of a program that contains a

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# configuration script generated by Autoconf, you may include it under

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# the same distribution terms that you use for the rest of that program.

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# This file is maintained in Automake, please report

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# bugs to <bug-automake@gnu.org> or send patches to

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# <automake-patches@gnu.org>.

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case "$1" in

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  '')

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    echo "$0: No files given.  Try \`$0 --help' for more information." 1>&2

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    exit 1

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    ;;

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  --basedir)

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    basedir=$2

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    shift 2

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    ;;

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  -h|--h*)

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    cat <<\EOF

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Usage: ylwrap [--help|--version] INPUT [OUTPUT DESIRED]... -- PROGRAM [ARGS]...

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Wrapper for lex/yacc invocations, renaming files as desired.

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  INPUT is the input file

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  OUTPUT is one file PROG generates

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  DESIRED is the file we actually want instead of OUTPUT

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  PROGRAM is program to run

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  ARGS are passed to PROG

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Any number of OUTPUT,DESIRED pairs may be used.

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Report bugs to <bug-automake@gnu.org>.

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EOF

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    exit $?

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    ;;

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  -v|--v*)

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    echo "ylwrap $scriptversion"

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    exit $?

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    ;;

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esac

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# The input.

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input="$1"

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shift

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case "$input" in

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  [\\/]* | ?:[\\/]*)

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    # Absolute path; do nothing.

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    ;;

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  *)

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    # Relative path.  Make it absolute.

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    input="`pwd`/$input"

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    ;;

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esac

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pairlist=

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while test "$#" -ne 0; do

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  if test "$1" = "--"; then

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    shift

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    break

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  fi

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  pairlist="$pairlist $1"

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  shift

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done

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# The program to run.

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prog="$1"

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shift

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# Make any relative path in $prog absolute.

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case "$prog" in

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  [\\/]* | ?:[\\/]*) ;;

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  *[\\/]*) prog="`pwd`/$prog" ;;

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esac

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# FIXME: add hostname here for parallel makes that run commands on

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# other machines.  But that might take us over the 14-char limit.

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dirname=ylwrap$$

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trap "cd `pwd`; rm -rf $dirname > /dev/null 2>&1" 1 2 3 15

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mkdir $dirname || exit 1

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cd $dirname

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case $# in

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  0) $prog "$input" ;;

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  *) $prog "$@" "$input" ;;

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esac

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ret=$?

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if test $ret -eq 0; then

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  set X $pairlist

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  shift

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  first=yes

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  # Since DOS filename conventions don't allow two dots,

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  # the DOS version of Bison writes out y_tab.c instead of y.tab.c

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  # and y_tab.h instead of y.tab.h. Test to see if this is the case.

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  y_tab_nodot="no"

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  if test -f y_tab.c || test -f y_tab.h; then

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    y_tab_nodot="yes"

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  fi

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  # The directory holding the input.

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  input_dir=`echo "$input" | sed -e 's,\([\\/]\)[^\\/]*$,\1,'`

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  # Quote $INPUT_DIR so we can use it in a regexp.

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  # FIXME: really we should care about more than `.' and `\'.

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  input_rx=`echo "$input_dir" | sed 's,\\\\,\\\\\\\\,g;s,\\.,\\\\.,g'`

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  while test "$#" -ne 0; do

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    from="$1"

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    # Handle y_tab.c and y_tab.h output by DOS

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    if test $y_tab_nodot = "yes"; then

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      if test $from = "y.tab.c"; then

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    	from="y_tab.c"

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      else

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    	if test $from = "y.tab.h"; then

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    	  from="y_tab.h"

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    	fi

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      fi

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    fi

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    if test -f "$from"; then

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      # If $2 is an absolute path name, then just use that,

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      # otherwise prepend `../'.

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      case "$2" in

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    	[\\/]* | ?:[\\/]*) target="$2";;

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    	*) target="../$2";;

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      esac

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      # We do not want to overwrite a header file if it hasn't

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      # changed.  This avoid useless recompilations.  However the

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      # parser itself (the first file) should always be updated,

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      # because it is the destination of the .y.c rule in the

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      # Makefile.  Divert the output of all other files to a temporary

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      # file so we can compare them to existing versions.

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      if test $first = no; then

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	realtarget="$target"

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	target="tmp-`echo $target | sed s/.*[\\/]//g`"

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      fi

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      # Edit out `#line' or `#' directives.

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      #

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      # We don't want the resulting debug information to point at

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      # an absolute srcdir; it is better for it to just mention the

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      # .y file with no path.

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      #

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      # We want to use the real output file name, not yy.lex.c for

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      # instance.

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      #

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      # We want the include guards to be adjusted too.

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      FROM=`echo "$from" | sed \

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            -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\

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            -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'`

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      TARGET=`echo "$2" | sed \

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            -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\

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            -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'`

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      sed -e "/^#/!b" -e "s,$input_rx,," -e "s,$from,$2," \

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          -e "s,$FROM,$TARGET," "$from" >"$target" || ret=$?

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      # Check whether header files must be updated.

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      if test $first = no; then

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	if test -f "$realtarget" && cmp -s "$realtarget" "$target"; then

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	  echo "$2" is unchanged

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	  rm -f "$target"

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	else

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          echo updating "$2"

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          mv -f "$target" "$realtarget"

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        fi

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      fi

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    else

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      # A missing file is only an error for the first file.  This

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      # is a blatant hack to let us support using "yacc -d".  If -d

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      # is not specified, we don't want an error when the header

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      # file is "missing".

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      if test $first = yes; then

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        ret=1

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      fi

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    fi

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    shift

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    shift

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    first=no

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  done

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else

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  ret=$?

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fi

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# Remove the directory.

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cd ..

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rm -rf $dirname

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exit $ret

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# Local Variables:

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# mode: shell-script

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# sh-indentation: 2

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# eval: (add-hook 'write-file-hooks 'time-stamp)

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# time-stamp-start: "scriptversion="

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# time-stamp-format: "%:y-%02m-%02d.%02H"

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# time-stamp-end: "$"

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# End: