ylwrap revision 60485 
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.
30prog="$1"
31shift
32# Make any relative path in $prog absolute.
33case "$prog" in
34 /* | [A-Za-z]:\\*) ;;
35 */*) prog="`pwd`/$prog" ;;
36esac
37
38# The input.
39input="$1"
40shift
41case "$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    ;;
51esac
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.
55input_base=`echo $input | sed -e 's|.*/||'`
56if test -f $input_base && cmp $input_base $input >/dev/null 2>&1; then
57  input=$input_base
58fi
59
60pairlist=
61while test "$#" -ne 0; do
62   if test "$1" = "--"; then
63      shift
64      break
65   fi
66   pairlist="$pairlist $1"
67   shift
68done
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.
72dirname=ylwrap$$
73trap "cd `pwd`; rm -rf $dirname > /dev/null 2>&1" 1 2 3 15
74mkdir $dirname || exit 1
75
76cd $dirname
77case "$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 ../"$input" .
84    ;;
85esac
86$prog ${1+"$@"} "$input"
87status=$?
88
89if 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 $first = yes; then
108	    status=1
109	 fi
110      fi
111      shift
112      shift
113      first=no
114   done
115else
116   status=$?
117fi
118
119# Remove the directory.
120cd ..
121rm -rf $dirname
122
123exit $status
124