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  /* | [A-Za-z]:\\*) ;;
  35  */*) prog="`pwd`/$prog" ;;
  36 esac
  37
  38 # The input.
  39 input="$1"
  40 shift
  41 case "$input" in
  42  /* | [A-Za-z]:\\*)
  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 # We don't want to use the absolute path if the input in the current
  54 # directory like when making a tar ball.
  55 input_base=`echo $input | sed -e 's|.*/||'`
  56 if test -f $input_base && cmp $input_base $input >/dev/null 2>&1; then
  57   input=$input_base
  58 fi
  59
  60 pairlist=
  61 while test "$#" -ne 0; do
  62    if test "$1" = "--"; then
  63       shift
  64       break
  65    fi
  66    pairlist="$pairlist $1"
  67    shift
  68 done
  69
  70 # FIXME: add hostname here for parallel makes that run commands on
  71 # other machines.  But that might take us over the 14-char limit.
  72 dirname=ylwrap$$
  73 trap "cd `pwd`; rm -rf $dirname > /dev/null 2>&1" 1 2 3 15
  74 mkdir $dirname || exit 1
  75
  76 cd $dirname
  77 case "$input" in
  78  /* | [A-Za-z]:\\*)
  79     # Absolute path; do nothing.
  80     ;;
  81  *)
  82     # Make a symbolic link, hard link or hardcopy.
  83     ln -s ../"$input" . > /dev/null 2>&1 || ln ../"$input" . > /dev/null 2>&1 || cp ../"$input" .
  84     ;;
  85 esac
  86 $prog ${1+"$@"} "$input"
  87 status=$?
  88
  89 if test $status -eq 0; then
  90    set X $pairlist
  91    shift
  92    first=yes
  93    while test "$#" -ne 0; do
  94       if test -f "$1"; then
  95          # If $2 is an absolute path name, then just use that,
  96          # otherwise prepend `../'.
  97          case "$2" in
  98            /* | [A-Za-z]:\\*) target="$2";;
  99            *) target="../$2";;
 100          esac
 101          mv "$1" "$target" || status=$?
 102       else
 103          # A missing file is only an error for the first file.  This
 104          # is a blatant hack to let us support using "yacc -d".  If -d
 105          # is not specified, we don't want an error when the header
 106          # file is "missing".
 107          if test $first = yes; then
 108             status=1
 109          fi
 110       fi
 111       shift
 112       shift
 113       first=no
 114    done
 115 else
 116    status=$?
 117 fi
 118
 119 # Remove the directory.
 120 cd ..
 121 rm -rf $dirname
 122
 123 exit $status