lib/ylwrap

   1 #! /bin/sh
   2 # ylwrap - wrapper for lex/yacc invocations.
   3 # Written by Tom Tromey <tromey@cygnus.com>, Aug 11 1996
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 2, or (at your option)
   8 # any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program; if not, write to the Free Software
  17 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18
  19 # Usage:
  20 #     ylwrap PROG [OUTPUT DESIRED]... -- [ARGS]...
  21 # * PROG is program to run.
  22 # * OUTPUT is file PROG generates
  23 # * DESIRED is file we actually want
  24 # * ARGS are passed to PROG
  25 # Any number of OUTPUT,DESIRED pairs may be used.
  26
  27 # The program to run.
  28 prog="$1"
  29 shift
  30
  31 pairlist=
  32 while test "$#" -ne 0; do
  33    if test "$1" = "--"; then
  34       break
  35    fi
  36    pairlist="$pairlist $1"
  37    shift
  38 done
  39
  40 $prog ${1+"$@"} || exit $?
  41
  42 set X $pairlist
  43 shift
  44 status=0
  45 first=yes
  46 while test "$#" -ne 0; do
  47    if test -f "$1"; then
  48       mv "$1" "$2" || status=$?
  49    else
  50       # A missing file is only an error for the first file.  This is a
  51       # blatant hack to let us support using "yacc -d".  If -d is not
  52       # specified, we don't want an error when the header file is
  53       # "missing".
  54       if test $first = yes; then
  55          status=1
  56       fi
  57    fi
  58    shift
  59    shift
  60    first=no
  61 done
  62 exit $status