1#! /bin/sh
2# ylwrap - wrapper for lex/yacc invocations.
3
4scriptversion=2003-11-18.20
5
6# Copyright (C) 1996, 1997, 1998, 1999, 2001, 2002, 2003
7#   Free Software Foundation, Inc.
8#
9# Written by Tom Tromey <tromey@cygnus.com>.
10#
11# This program is free software; you can redistribute it and/or modify
12# it under the terms of the GNU General Public License as published by
13# the Free Software Foundation; either version 2, or (at your option)
14# any later version.
15#
16# This program is distributed in the hope that it will be useful,
17# but WITHOUT ANY WARRANTY; without even the implied warranty of
18# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19# GNU General Public License for more details.
20#
21# You should have received a copy of the GNU General Public License
22# along with this program; if not, write to the Free Software
23# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24
25# As a special exception to the GNU General Public License, if you
26# distribute this file as part of a program that contains a
27# configuration script generated by Autoconf, you may include it under
28# the same distribution terms that you use for the rest of that program.
29
30# This file is maintained in Automake, please report
31# bugs to <bug-automake@gnu.org> or send patches to
32# <automake-patches@gnu.org>.
33
34case "$1" in
35  '')
36    echo "$0: No files given.  Try \`$0 --help' for more information." 1>&2
37    exit 1
38    ;;
39  --basedir)
40    basedir=$2
41    shift 2
42    ;;
43  -h|--h*)
44    cat <<\EOF
45Usage: ylwrap [--help|--version] INPUT [OUTPUT DESIRED]... -- PROGRAM [ARGS]...
46
47Wrapper for lex/yacc invocations, renaming files as desired.
48
49  INPUT is the input file
50  OUTPUT is one file PROG generates
51  DESIRED is the file we actually want instead of OUTPUT
52  PROGRAM is program to run
53  ARGS are passed to PROG
54
55Any number of OUTPUT,DESIRED pairs may be used.
56
57Report bugs to <bug-automake@gnu.org>.
58EOF
59    exit 0
60    ;;
61  -v|--v*)
62    echo "ylwrap $scriptversion"
63    exit 0
64    ;;
65esac
66
67
68# The input.
69input="$1"
70shift
71case "$input" in
72  [\\/]* | ?:[\\/]*)
73    # Absolute path; do nothing.
74    ;;
75  *)
76    # Relative path.  Make it absolute.
77    input="`pwd`/$input"
78    ;;
79esac
80
81pairlist=
82while test "$#" -ne 0; do
83  if test "$1" = "--"; then
84    shift
85    break
86  fi
87  pairlist="$pairlist $1"
88  shift
89done
90
91# The program to run.
92prog="$1"
93shift
94# Make any relative path in $prog absolute.
95case "$prog" in
96  [\\/]* | ?:[\\/]*) ;;
97  *[\\/]*) prog="`pwd`/$prog" ;;
98esac
99
100# FIXME: add hostname here for parallel makes that run commands on
101# other machines.  But that might take us over the 14-char limit.
102dirname=ylwrap$$
103trap "cd `pwd`; rm -rf $dirname > /dev/null 2>&1" 1 2 3 15
104mkdir $dirname || exit 1
105
106cd $dirname
107
108case $# in
109  0) $prog "$input" ;;
110  *) $prog "$@" "$input" ;;
111esac
112status=$?
113
114if test $status -eq 0; then
115  set X $pairlist
116  shift
117  first=yes
118  # Since DOS filename conventions don't allow two dots,
119  # the DOS version of Bison writes out y_tab.c instead of y.tab.c
120  # and y_tab.h instead of y.tab.h. Test to see if this is the case.
121  y_tab_nodot="no"
122  if test -f y_tab.c || test -f y_tab.h; then
123    y_tab_nodot="yes"
124  fi
125
126  # The directory holding the input.
127  input_dir=`echo "$input" | sed -e 's,\([\\/]\)[^\\/]*$,\1,'`
128  # Quote $INPUT_DIR so we can use it in a regexp.
129  # FIXME: really we should care about more than `.' and `\'.
130  input_rx=`echo "$input_dir" | sed 's,\\\\,\\\\\\\\,g;s,\\.,\\\\.,g'`
131
132  while test "$#" -ne 0; do
133    from="$1"
134    # Handle y_tab.c and y_tab.h output by DOS
135    if test $y_tab_nodot = "yes"; then
136      if test $from = "y.tab.c"; then
137    	from="y_tab.c"
138      else
139    	if test $from = "y.tab.h"; then
140    	  from="y_tab.h"
141    	fi
142      fi
143    fi
144    if test -f "$from"; then
145      # If $2 is an absolute path name, then just use that,
146      # otherwise prepend `../'.
147      case "$2" in
148    	[\\/]* | ?:[\\/]*) target="$2";;
149    	*) target="../$2";;
150      esac
151
152      # We do not want to overwrite a header file if it hasn't
153      # changed.  This avoid useless recompilations.  However the
154      # parser itself (the first file) should always be updated,
155      # because it is the destination of the .y.c rule in the
156      # Makefile.  Divert the output of all other files to a temporary
157      # file so we can compare them to existing versions.
158      if test $first = no; then
159	realtarget="$target"
160	target="tmp-`echo $target | sed s/.*[\\/]//g`"
161      fi
162      # Edit out `#line' or `#' directives.
163      #
164      # We don't want the resulting debug information to point at
165      # an absolute srcdir; it is better for it to just mention the
166      # .y file with no path.
167      #
168      # We want to use the real output file name, not yy.lex.c for
169      # instance.
170      #
171      # We want the include guards to be adjusted too.
172      FROM=`echo "$from" | sed \
173            -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\
174            -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'`
175      TARGET=`echo "$2" | sed \
176            -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\
177            -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'`
178
179      sed -e "/^#/!b" -e "s,$input_rx,," -e "s,$from,$2," \
180          -e "s,$FROM,$TARGET," "$from" >"$target" || status=$?
181
182      # Check whether header files must be updated.
183      if test $first = no; then
184	if test -f "$realtarget" && cmp -s "$realtarget" "$target"; then
185	  echo "$2" is unchanged
186	  rm -f "$target"
187	else
188          echo updating "$2"
189          mv -f "$target" "$realtarget"
190        fi
191      fi
192    else
193      # A missing file is only an error for the first file.  This
194      # is a blatant hack to let us support using "yacc -d".  If -d
195      # is not specified, we don't want an error when the header
196      # file is "missing".
197      if test $first = yes; then
198        status=1
199      fi
200    fi
201    shift
202    shift
203    first=no
204  done
205else
206  status=$?
207fi
208
209# Remove the directory.
210cd ..
211rm -rf $dirname
212
213exit $status
214
215# Local Variables:
216# mode: shell-script
217# sh-indentation: 2
218# eval: (add-hook 'write-file-hooks 'time-stamp)
219# time-stamp-start: "scriptversion="
220# time-stamp-format: "%:y-%02m-%02d.%02H"
221# time-stamp-end: "$"
222# End:
223