ylwrap

   1 #! /bin/sh
   2 # ylwrap - wrapper for lex/yacc invocations.
   3 # Copyright 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
   4 # Written by Tom Tromey <tromey@cygnus.com>.
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 2, or (at your option)
   9 # any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program; if not, write to the Free Software
  18 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19
  20 # As a special exception to the GNU General Public License, if you
  21 # distribute this file as part of a program that contains a
  22 # configuration script generated by Autoconf, you may include it under
  23 # the same distribution terms that you use for the rest of that program.
  24
  25 # Usage:
  26 #     ylwrap INPUT [OUTPUT DESIRED]... -- PROGRAM [ARGS]...
  27 # * INPUT is the input file
  28 # * OUTPUT is file PROG generates
  29 # * DESIRED is file we actually want
  30 # * PROGRAM is program to run
  31 # * ARGS are passed to PROG
  32 # Any number of OUTPUT,DESIRED pairs may be used.
  33
  34 # The input.
  35 input="$1"
  36 shift
  37 case "$input" in
  38  [\\/]* | ?:[\\/]*)
  39     # Absolute path; do nothing.
  40     ;;
  41  *)
  42     # Relative path.  Make it absolute.
  43     input="`pwd`/$input"
  44     ;;
  45 esac
  46
  47 # The directory holding the input.
  48 input_dir=`echo "$input" | sed -e 's,\([\\/]\)[^\\/]*$,\1,'`
  49 # Quote $INPUT_DIR so we can use it in a regexp.
  50 # FIXME: really we should care about more than `.' and `\'.
  51 input_rx=`echo "$input_dir" | sed -e 's,\\\\,\\\\\\\\,g' -e 's,\\.,\\\\.,g'`
  52
  53 echo "got $input_rx"
  54
  55 pairlist=
  56 while test "$#" -ne 0; do
  57    if test "$1" = "--"; then
  58       shift
  59       break
  60    fi
  61    pairlist="$pairlist $1"
  62    shift
  63 done
  64
  65 # The program to run.
  66 prog="$1"
  67 shift
  68 # Make any relative path in $prog absolute.
  69 case "$prog" in
  70  [\\/]* | ?:[\\/]*) ;;
  71  *[\\/]*) prog="`pwd`/$prog" ;;
  72 esac
  73
  74 # FIXME: add hostname here for parallel makes that run commands on
  75 # other machines.  But that might take us over the 14-char limit.
  76 dirname=ylwrap$$
  77 trap "cd `pwd`; rm -rf $dirname > /dev/null 2>&1" 1 2 3 15
  78 mkdir $dirname || exit 1
  79
  80 cd $dirname
  81
  82 $prog ${1+"$@"} "$input"
  83 status=$?
  84
  85 if test $status -eq 0; then
  86    set X $pairlist
  87    shift
  88    first=yes
  89    # Since DOS filename conventions don't allow two dots,
  90    # the DOS version of Bison writes out y_tab.c instead of y.tab.c
  91    # and y_tab.h instead of y.tab.h. Test to see if this is the case.
  92    y_tab_nodot="no"
  93    if test -f y_tab.c || test -f y_tab.h; then
  94       y_tab_nodot="yes"
  95    fi
  96
  97    while test "$#" -ne 0; do
  98       from="$1"
  99       # Handle y_tab.c and y_tab.h output by DOS
 100       if test $y_tab_nodot = "yes"; then
 101          if test $from = "y.tab.c"; then
 102             from="y_tab.c"
 103          else
 104             if test $from = "y.tab.h"; then
 105                from="y_tab.h"
 106             fi
 107          fi
 108       fi
 109       if test -f "$from"; then
 110          # If $2 is an absolute path name, then just use that,
 111          # otherwise prepend `../'.
 112          case "$2" in
 113            [\\/]* | ?:[\\/]*) target="$2";;
 114            *) target="../$2";;
 115          esac
 116
 117          # Edit out `#line' or `#' directives.  We don't want the
 118          # resulting debug information to point at an absolute srcdir;
 119          # it is better for it to just mention the .y file with no
 120          # path.
 121          sed -e "/^#/ s,$input_rx,," "$from" > "$target" || status=$?
 122       else
 123          # A missing file is only an error for the first file.  This
 124          # is a blatant hack to let us support using "yacc -d".  If -d
 125          # is not specified, we don't want an error when the header
 126          # file is "missing".
 127          if test $first = yes; then
 128             status=1
 129          fi
 130       fi
 131       shift
 132       shift
 133       first=no
 134    done
 135 else
 136    status=$?
 137 fi
 138
 139 # Remove the directory.
 140 cd ..
 141 rm -rf $dirname
 142
 143 exit $status