1#! /bin/sh
2# ylwrap - wrapper for lex/yacc invocations.
3# Copyright 1996, 1997, 1998, 1999 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# As a special exception to the GNU General Public License, if you
21# distribute this file as part of a program that contains a
22# configuration script generated by Autoconf, you may include it under
23# the same distribution terms that you use for the rest of that program.
24
25# Usage:
26#     ylwrap INPUT [OUTPUT DESIRED]... -- PROGRAM [ARGS]...
27# * INPUT is the input file
28# * OUTPUT is file PROG generates
29# * DESIRED is file we actually want
30# * PROGRAM is program to run
31# * ARGS are passed to PROG
32# Any number of OUTPUT,DESIRED pairs may be used.
33
34# The input.
35input="$1"
36shift
37case "$input" in
38 [\\/]* | ?:[\\/]*)
39    # Absolute path; do nothing.
40    ;;
41 *)
42    # Relative path.  Make it absolute.
43    input="`pwd`/$input"
44    ;;
45esac
46
47# The directory holding the input.
48input_dir=`echo "$input" | sed -e 's,\([\\/]\)[^\\/]*$,\1,'`
49# Quote $INPUT_DIR so we can use it in a regexp.
50# FIXME: really we should care about more than `.' and `\'.
51input_rx=`echo "$input_dir" | sed -e 's,\\\\,\\\\\\\\,g' -e 's,\\.,\\\\.,g'`
52
53echo "got $input_rx"
54
55pairlist=
56while test "$#" -ne 0; do
57   if test "$1" = "--"; then
58      shift
59      break
60   fi
61   pairlist="$pairlist $1"
62   shift
63done
64
65# The program to run.
66prog="$1"
67shift
68# Make any relative path in $prog absolute.
69case "$prog" in
70 [\\/]* | ?:[\\/]*) ;;
71 *[\\/]*) prog="`pwd`/$prog" ;;
72esac
73
74# FIXME: add hostname here for parallel makes that run commands on
75# other machines.  But that might take us over the 14-char limit.
76dirname=ylwrap$$
77trap "cd `pwd`; rm -rf $dirname > /dev/null 2>&1" 1 2 3 15
78mkdir $dirname || exit 1
79
80cd $dirname
81
82$prog ${1+"$@"} "$input"
83status=$?
84
85if test $status -eq 0; then
86   set X $pairlist
87   shift
88   first=yes
89   # Since DOS filename conventions don't allow two dots,
90   # the DOS version of Bison writes out y_tab.c instead of y.tab.c
91   # and y_tab.h instead of y.tab.h. Test to see if this is the case.
92   y_tab_nodot="no"
93   if test -f y_tab.c || test -f y_tab.h; then
94      y_tab_nodot="yes"
95   fi
96
97   while test "$#" -ne 0; do
98      from="$1"
99      # Handle y_tab.c and y_tab.h output by DOS
100      if test $y_tab_nodot = "yes"; then
101	 if test $from = "y.tab.c"; then
102	    from="y_tab.c"
103	 else
104	    if test $from = "y.tab.h"; then
105	       from="y_tab.h"
106	    fi
107	 fi
108      fi
109      if test -f "$from"; then
110         # If $2 is an absolute path name, then just use that,
111         # otherwise prepend `../'.
112         case "$2" in
113	   [\\/]* | ?:[\\/]*) target="$2";;
114	   *) target="../$2";;
115	 esac
116
117	 # Edit out `#line' or `#' directives.  We don't want the
118	 # resulting debug information to point at an absolute srcdir;
119	 # it is better for it to just mention the .y file with no
120	 # path.
121	 sed -e "/^#/ s,$input_rx,," "$from" > "$target" || status=$?
122      else
123	 # A missing file is only an error for the first file.  This
124	 # is a blatant hack to let us support using "yacc -d".  If -d
125	 # is not specified, we don't want an error when the header
126	 # file is "missing".
127	 if test $first = yes; then
128	    status=1
129	 fi
130      fi
131      shift
132      shift
133      first=no
134   done
135else
136   status=$?
137fi
138
139# Remove the directory.
140cd ..
141rm -rf $dirname
142
143exit $status
144