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