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      1 #! /bin/sh
      2 # ylwrap - wrapper for lex/yacc invocations.
      3 
      4 scriptversion=2012-10-08.07; # UTC
      5 
      6 # Copyright (C) 1996, 1997, 1998, 1999, 2001, 2002, 2003, 2004, 2005,
      7 # 2007, 2009, 2010, 2011 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, see <http://www.gnu.org/licenses/>.
     23 
     24 # As a special exception to the GNU General Public License, if you
     25 # distribute this file as part of a program that contains a
     26 # configuration script generated by Autoconf, you may include it under
     27 # the same distribution terms that you use for the rest of that program.
     28 
     29 # This file is maintained in Automake, please report
     30 # bugs to <bug-automake (at] gnu.org> or send patches to
     31 # <automake-patches (at] gnu.org>.
     32 
     33 case "$1" in
     34   '')
     35     echo "$0: No files given.  Try \`$0 --help' for more information." 1>&2
     36     exit 1
     37     ;;
     38   --basedir)
     39     basedir=$2
     40     shift 2
     41     ;;
     42   -h|--h*)
     43     cat <<\EOF
     44 Usage: ylwrap [--help|--version] INPUT [OUTPUT DESIRED]... -- PROGRAM [ARGS]...
     45 
     46 Wrapper for lex/yacc invocations, renaming files as desired.
     47 
     48   INPUT is the input file
     49   OUTPUT is one file PROG generates
     50   DESIRED is the file we actually want instead of OUTPUT
     51   PROGRAM is program to run
     52   ARGS are passed to PROG
     53 
     54 Any number of OUTPUT,DESIRED pairs may be used.
     55 
     56 Report bugs to <bug-automake (at] gnu.org>.
     57 EOF
     58     exit $?
     59     ;;
     60   -v|--v*)
     61     echo "ylwrap $scriptversion"
     62     exit $?
     63     ;;
     64 esac
     65 
     66 
     67 # The input.
     68 input="$1"
     69 shift
     70 case "$input" in
     71   [\\/]* | ?:[\\/]*)
     72     # Absolute path; do nothing.
     73     ;;
     74   *)
     75     # Relative path.  Make it absolute.
     76     input="`pwd`/$input"
     77     ;;
     78 esac
     79 
     80 pairlist=
     81 while test "$#" -ne 0; do
     82   if test "$1" = "--"; then
     83     shift
     84     break
     85   fi
     86   pairlist="$pairlist $1"
     87   shift
     88 done
     89 
     90 # The program to run.
     91 prog="$1"
     92 shift
     93 # Make any relative path in $prog absolute.
     94 case "$prog" in
     95   [\\/]* | ?:[\\/]*) ;;
     96   *[\\/]*) prog="`pwd`/$prog" ;;
     97 esac
     98 
     99 # FIXME: add hostname here for parallel makes that run commands on
    100 # other machines.  But that might take us over the 14-char limit.
    101 dirname=ylwrap$$
    102 do_exit="cd '`pwd`' && rm -rf $dirname > /dev/null 2>&1;"' (exit $ret); exit $ret'
    103 trap "ret=129; $do_exit" 1
    104 trap "ret=130; $do_exit" 2
    105 trap "ret=141; $do_exit" 13
    106 trap "ret=143; $do_exit" 15
    107 mkdir $dirname || exit 1
    108 
    109 cd $dirname
    110 
    111 case $# in
    112   0) "$prog" "$input" ;;
    113   *) "$prog" "$@" "$input" ;;
    114 esac
    115 ret=$?
    116 
    117 if test $ret -eq 0; then
    118   set X $pairlist
    119   shift
    120   first=yes
    121   # Since DOS filename conventions don't allow two dots,
    122   # the DOS version of Bison writes out y_tab.c instead of y.tab.c
    123   # and y_tab.h instead of y.tab.h. Test to see if this is the case.
    124   y_tab_nodot="no"
    125   if test -f y_tab.c || test -f y_tab.h; then
    126     y_tab_nodot="yes"
    127   fi
    128 
    129   # The directory holding the input.
    130   input_dir=`echo "$input" | sed -e 's,\([\\/]\)[^\\/]*$,\1,'`
    131   # Quote $INPUT_DIR so we can use it in a regexp.
    132   # FIXME: really we should care about more than `.' and `\'.
    133   input_rx=`echo "$input_dir" | sed 's,\\\\,\\\\\\\\,g;s,\\.,\\\\.,g'`
    134 
    135   while test "$#" -ne 0; do
    136     from="$1"
    137     # Handle y_tab.c and y_tab.h output by DOS
    138     if test $y_tab_nodot = "yes"; then
    139       if test $from = "y.tab.c"; then
    140         from="y_tab.c"
    141       else
    142         if test $from = "y.tab.h"; then
    143           from="y_tab.h"
    144         fi
    145       fi
    146     fi
    147     if test -f "$from"; then
    148       # If $2 is an absolute path name, then just use that,
    149       # otherwise prepend `../'.
    150       case "$2" in
    151         [\\/]* | ?:[\\/]*) target="$2";;
    152         *) target="../$2";;
    153       esac
    154 
    155       # We do not want to overwrite a header file if it hasn't
    156       # changed.  This avoid useless recompilations.  However the
    157       # parser itself (the first file) should always be updated,
    158       # because it is the destination of the .y.c rule in the
    159       # Makefile.  Divert the output of all other files to a temporary
    160       # file so we can compare them to existing versions.
    161       if test $first = no; then
    162         realtarget="$target"
    163         target="tmp-`echo $target | sed s/.*[\\/]//g`"
    164       fi
    165       # Edit out `#line' or `#' directives.
    166       #
    167       # We don't want the resulting debug information to point at
    168       # an absolute srcdir; it is better for it to just mention the
    169       # .y file with no path.
    170       #
    171       # We want to use the real output file name, not yy.lex.c for
    172       # instance.
    173       #
    174       # We want the include guards to be adjusted too.
    175       FROM=`echo "$from" | sed \
    176             -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\
    177             -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'`
    178       TARGET=`echo "$2" | sed \
    179             -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\
    180             -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'`
    181 
    182       sed -e "/^#/!b" -e "s,$input_rx,," -e "s,$from,$2," \
    183           -e "s,$FROM,$TARGET," "$from" >"$target" || ret=$?
    184 
    185       # Check whether header files must be updated.
    186       if test $first = no; then
    187         if test -f "$realtarget" && cmp -s "$realtarget" "$target"; then
    188           echo "$2" is unchanged
    189           rm -f "$target"
    190         else
    191           echo updating "$2"
    192           mv -f "$target" "$realtarget"
    193         fi
    194       fi
    195     else
    196       # A missing file is only an error for the first file.  This
    197       # is a blatant hack to let us support using "yacc -d".  If -d
    198       # is not specified, we don't want an error when the header
    199       # file is "missing".
    200       if test $first = yes; then
    201         ret=1
    202       fi
    203     fi
    204     shift
    205     shift
    206     first=no
    207   done
    208 else
    209   ret=$?
    210 fi
    211 
    212 # Remove the directory.
    213 cd ..
    214 rm -rf $dirname
    215 
    216 exit $ret
    217 
    218 # Local Variables:
    219 # mode: shell-script
    220 # sh-indentation: 2
    221 # eval: (add-hook 'write-file-hooks 'time-stamp)
    222 # time-stamp-start: "scriptversion="
    223 # time-stamp-format: "%:y-%02m-%02d.%02H"
    224 # time-stamp-time-zone: "UTC"
    225 # time-stamp-end: "; # UTC"
    226 # End:
    227