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[binutils.git] / ylwrap
blob10e4368b35f1c6e009caa923f5bc8dc5ff82f196
1 #! /bin/sh
2 # ylwrap - wrapper for lex/yacc invocations.
4 scriptversion=2005-02-02.22
6 # Copyright (C) 1996, 1997, 1998, 1999, 2001, 2002, 2003, 2004, 2005
7 # Free Software Foundation, Inc.
9 # Written by Tom Tromey <tromey@cygnus.com>.
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.
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.
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.
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.
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>.
34 case "$1" in
35 '')
36 echo "$0: No files given. Try \`$0 --help' for more information." 1>&2
37 exit 1
39 --basedir)
40 basedir=$2
41 shift 2
43 -h|--h*)
44 cat <<\EOF
45 Usage: ylwrap [--help|--version] INPUT [OUTPUT DESIRED]... -- PROGRAM [ARGS]...
47 Wrapper for lex/yacc invocations, renaming files as desired.
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
55 Any number of OUTPUT,DESIRED pairs may be used.
57 Report bugs to <bug-automake@gnu.org>.
58 EOF
59 exit $?
61 -v|--v*)
62 echo "ylwrap $scriptversion"
63 exit $?
65 esac
68 # The input.
69 input="$1"
70 shift
71 case "$input" in
72 [\\/]* | ?:[\\/]*)
73 # Absolute path; do nothing.
76 # Relative path. Make it absolute.
77 input="`pwd`/$input"
79 esac
81 pairlist=
82 while test "$#" -ne 0; do
83 if test "$1" = "--"; then
84 shift
85 break
87 pairlist="$pairlist $1"
88 shift
89 done
91 # The program to run.
92 prog="$1"
93 shift
94 # Make any relative path in $prog absolute.
95 case "$prog" in
96 [\\/]* | ?:[\\/]*) ;;
97 *[\\/]*) prog="`pwd`/$prog" ;;
98 esac
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.
102 dirname=ylwrap$$
103 trap "cd `pwd`; rm -rf $dirname > /dev/null 2>&1" 1 2 3 15
104 mkdir $dirname || exit 1
106 cd $dirname
108 case $# in
109 0) $prog "$input" ;;
110 *) $prog "$@" "$input" ;;
111 esac
112 ret=$?
114 if test $ret -eq 0; then
115 set X $pairlist
116 shift
117 first=yes
118 # Since DOS filename conventions don't allow two dots,
119 # the DOS version of Bison writes out y_tab.c instead of y.tab.c
120 # and y_tab.h instead of y.tab.h. Test to see if this is the case.
121 y_tab_nodot="no"
122 if test -f y_tab.c || test -f y_tab.h; then
123 y_tab_nodot="yes"
126 # The directory holding the input.
127 input_dir=`echo "$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'`
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 $from = "y.tab.h"; then
140 from="y_tab.h"
144 if test -f "$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
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 $target | sed s/.*[\\/]//g`"
162 # Edit out `#line' or `#' directives.
164 # We don't want the resulting debug information to point at
165 # an absolute srcdir; it is better for it to just mention the
166 # .y file with no path.
168 # We want to use the real output file name, not yy.lex.c for
169 # instance.
171 # We want the include guards to be adjusted too.
172 FROM=`echo "$from" | sed \
173 -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\
174 -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'`
175 TARGET=`echo "$2" | sed \
176 -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\
177 -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'`
179 sed -e "/^#/!b" -e "s,$input_rx,," -e "s,$from,$2," \
180 -e "s,$FROM,$TARGET," "$from" >"$target" || ret=$?
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"
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 $first = yes; then
198 ret=1
201 shift
202 shift
203 first=no
204 done
205 else
206 ret=$?
209 # Remove the directory.
210 cd ..
211 rm -rf $dirname
213 exit $ret
215 # Local Variables:
216 # mode: shell-script
217 # sh-indentation: 2
218 # eval: (add-hook 'write-file-hooks 'time-stamp)
219 # time-stamp-start: "scriptversion="
220 # time-stamp-format: "%:y-%02m-%02d.%02H"
221 # time-stamp-end: "$"
222 # End: