#! /bin/sh
# ylwrap - wrapper for lex/yacc invocations.
# Copyright (C) 1996, 1997 Free Software Foundation, Inc.
# Written by Tom Tromey <tromey@cygnus.com>.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# Usage:
# ylwrap PROGRAM INPUT [OUTPUT DESIRED]... -- [ARGS]...
# * PROGRAM is program to run.
# * INPUT is the input file
# * OUTPUT is file PROG generates
# * DESIRED is file we actually want
# * ARGS are passed to PROG
# Any number of OUTPUT,DESIRED pairs may be used.
# The program to run.
prog="$1"
shift
# The input.
input="$1"
shift
case "$input" in
/*)
# Absolute path; do nothing.
;;
*)
# Relative path. Make it absolute. Why? Because otherwise any
# debugging info in the generated file will point to the wrong
# place. This is really gross.
input="`pwd`/$input"
;;
esac
pairlist=
while test "$#" -ne 0; do
if test "$1" = "--"; then
break
fi
pairlist="$pairlist $1"
shift
done
# FIXME: add hostname here for parallel makes that run commands on
# other machines. But that might take us over the 14-char limit.
dirname=ylwrap$$
trap "cd `pwd`; rm -rf $dirname > /dev/null 2>&1" 1 2 3 15
mkdir $dirname || exit 1
cd $dirname
$prog ${1+"$@"} "$input"
status=$?
if test $status -eq 0; then
set X $pairlist
shift
first=yes
while test "$#" -ne 0; do
if test -f "$1"; then
# If $2 is an absolute path name, then just use that,
# otherwise prepend `../'.
case "$2" in
/*) target="$2";;
*) target="../$2";;
esac
mv "$1" "$target" || status=$?
else
# A missing file is only an error for the first file. This
# is a blatant hack to let us support using "yacc -d". If -d
# is not specified, we don't want an error when the header
# file is "missing".
if test $first = yes; then
status=1
fi
fi
shift
shift
first=no
done
else
status=$?
fi
# Remove the directory.
cd ..
rm -rf $dirname
exit $status
