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      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 (at] 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 (at] gnu.org> or send patches to
     33 # <automake-patches (at] 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 (at] 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:
    224