ylwrap

   1 #! /bin/sh
   2 # ylwrap - wrapper for lex/yacc invocations.
   3 # Copyright (C) 1996, 1997 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 # Usage:
  21 #     ylwrap PROGRAM INPUT [OUTPUT DESIRED]... -- [ARGS]...
  22 # * PROGRAM is program to run.
  23 # * INPUT is the input file
  24 # * OUTPUT is file PROG generates
  25 # * DESIRED is file we actually want
  26 # * ARGS are passed to PROG
  27 # Any number of OUTPUT,DESIRED pairs may be used.
  28
  29 # The program to run.
  30 prog="$1"
  31 shift
  32 # Make any relative path in $prog absolute.
  33 case "$prog" in
  34  /*) ;;
  35  */*) prog="`pwd`/$prog" ;;
  36 esac
  37
  38 # The input.
  39 input="$1"
  40 shift
  41 case "$input" in
  42  /*)
  43     # Absolute path; do nothing.
  44     ;;
  45  *)
  46     # Relative path.  Make it absolute.  Why?  Because otherwise any
  47     # debugging info in the generated file will point to the wrong
  48     # place.  This is really gross.
  49     input="`pwd`/$input"
  50     ;;
  51 esac
  52
  53 pairlist=
  54 while test "$#" -ne 0; do
  55    if test "$1" = "--"; then
  56       shift
  57       break
  58    fi
  59    pairlist="$pairlist $1"
  60    shift
  61 done
  62
  63 # FIXME: add hostname here for parallel makes that run commands on
  64 # other machines.  But that might take us over the 14-char limit.
  65 dirname=ylwrap$$
  66 trap "cd `pwd`; rm -rf $dirname > /dev/null 2>&1" 1 2 3 15
  67 mkdir $dirname || exit 1
  68
  69 cd $dirname
  70 $prog ${1+"$@"} "$input"
  71 status=$?
  72
  73 if test $status -eq 0; then
  74    set X $pairlist
  75    shift
  76    first=yes
  77    while test "$#" -ne 0; do
  78       if test -f "$1"; then
  79          # If $2 is an absolute path name, then just use that,
  80          # otherwise prepend `../'.
  81          case "$2" in
  82            /*) target="$2";;
  83            *) target="../$2";;
  84          esac
  85          mv "$1" "$target" || status=$?
  86       else
  87          # A missing file is only an error for the first file.  This
  88          # is a blatant hack to let us support using "yacc -d".  If -d
  89          # is not specified, we don't want an error when the header
  90          # file is "missing".
  91          if test $first = yes; then
  92             status=1
  93          fi
  94       fi
  95       shift
  96       shift
  97       first=no
  98    done
  99 else
 100    status=$?
 101 fi
 102
 103 # Remove the directory.
 104 cd ..
 105 rm -rf $dirname
 106
 107 exit $status