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252b5132 RH |
1 | #! /bin/sh |
2 | # ylwrap - wrapper for lex/yacc invocations. | |
42ecbf5e | 3 | |
e3046511 | 4 | scriptversion=2013-01-12.17; # UTC |
42ecbf5e | 5 | |
e3046511 | 6 | # Copyright (C) 1996-2014 Free Software Foundation, Inc. |
42ecbf5e | 7 | # |
252b5132 RH |
8 | # Written by Tom Tromey <tromey@cygnus.com>. |
9 | # | |
10 | # This program is free software; you can redistribute it and/or modify | |
11 | # it under the terms of the GNU General Public License as published by | |
12 | # the Free Software Foundation; either version 2, or (at your option) | |
13 | # any later version. | |
14 | # | |
15 | # This program is distributed in the hope that it will be useful, | |
16 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | # GNU General Public License for more details. | |
19 | # | |
20 | # You should have received a copy of the GNU General Public License | |
13b7343a | 21 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
252b5132 | 22 | |
42ecbf5e DJ |
23 | # As a special exception to the GNU General Public License, if you |
24 | # distribute this file as part of a program that contains a | |
25 | # configuration script generated by Autoconf, you may include it under | |
26 | # the same distribution terms that you use for the rest of that program. | |
252b5132 | 27 | |
42ecbf5e DJ |
28 | # This file is maintained in Automake, please report |
29 | # bugs to <bug-automake@gnu.org> or send patches to | |
30 | # <automake-patches@gnu.org>. | |
31 | ||
e3046511 JBG |
32 | get_dirname () |
33 | { | |
34 | case $1 in | |
35 | */*|*\\*) printf '%s\n' "$1" | sed -e 's|\([\\/]\)[^\\/]*$|\1|';; | |
36 | # Otherwise, we want the empty string (not "."). | |
37 | esac | |
38 | } | |
39 | ||
40 | # guard FILE | |
41 | # ---------- | |
42 | # The CPP macro used to guard inclusion of FILE. | |
43 | guard () | |
44 | { | |
45 | printf '%s\n' "$1" \ | |
46 | | sed \ | |
47 | -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' \ | |
48 | -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g' \ | |
49 | -e 's/__*/_/g' | |
50 | } | |
51 | ||
52 | # quote_for_sed [STRING] | |
53 | # ---------------------- | |
54 | # Return STRING (or stdin) quoted to be used as a sed pattern. | |
55 | quote_for_sed () | |
56 | { | |
57 | case $# in | |
58 | 0) cat;; | |
59 | 1) printf '%s\n' "$1";; | |
60 | esac \ | |
61 | | sed -e 's|[][\\.*]|\\&|g' | |
62 | } | |
63 | ||
42ecbf5e DJ |
64 | case "$1" in |
65 | '') | |
e3046511 | 66 | echo "$0: No files given. Try '$0 --help' for more information." 1>&2 |
42ecbf5e DJ |
67 | exit 1 |
68 | ;; | |
69 | --basedir) | |
70 | basedir=$2 | |
71 | shift 2 | |
72 | ;; | |
73 | -h|--h*) | |
74 | cat <<\EOF | |
75 | Usage: ylwrap [--help|--version] INPUT [OUTPUT DESIRED]... -- PROGRAM [ARGS]... | |
76 | ||
77 | Wrapper for lex/yacc invocations, renaming files as desired. | |
78 | ||
79 | INPUT is the input file | |
80 | OUTPUT is one file PROG generates | |
81 | DESIRED is the file we actually want instead of OUTPUT | |
82 | PROGRAM is program to run | |
83 | ARGS are passed to PROG | |
84 | ||
85 | Any number of OUTPUT,DESIRED pairs may be used. | |
86 | ||
87 | Report bugs to <bug-automake@gnu.org>. | |
88 | EOF | |
89 | exit $? | |
90 | ;; | |
91 | -v|--v*) | |
92 | echo "ylwrap $scriptversion" | |
93 | exit $? | |
94 | ;; | |
252b5132 RH |
95 | esac |
96 | ||
42ecbf5e | 97 | |
252b5132 | 98 | # The input. |
e3046511 | 99 | input=$1 |
252b5132 | 100 | shift |
e3046511 JBG |
101 | # We'll later need for a correct munging of "#line" directives. |
102 | input_sub_rx=`get_dirname "$input" | quote_for_sed` | |
103 | case $input in | |
42ecbf5e | 104 | [\\/]* | ?:[\\/]*) |
252b5132 RH |
105 | # Absolute path; do nothing. |
106 | ;; | |
42ecbf5e DJ |
107 | *) |
108 | # Relative path. Make it absolute. | |
e3046511 | 109 | input=`pwd`/$input |
252b5132 RH |
110 | ;; |
111 | esac | |
e3046511 JBG |
112 | input_rx=`get_dirname "$input" | quote_for_sed` |
113 | ||
114 | # The parser itself, the first file, is the destination of the .y.c | |
115 | # rule in the Makefile. | |
116 | parser=$1 | |
117 | ||
118 | # A sed program to s/FROM/TO/g for all the FROM/TO so that, for | |
119 | # instance, we rename #include "y.tab.h" into #include "parse.h" | |
120 | # during the conversion from y.tab.c to parse.c. | |
121 | sed_fix_filenames= | |
122 | ||
123 | # Also rename header guards, as Bison 2.7 for instance uses its header | |
124 | # guard in its implementation file. | |
125 | sed_fix_header_guards= | |
252b5132 | 126 | |
e3046511 JBG |
127 | while test $# -ne 0; do |
128 | if test x"$1" = x"--"; then | |
42ecbf5e DJ |
129 | shift |
130 | break | |
131 | fi | |
e3046511 | 132 | from=$1 |
42ecbf5e | 133 | shift |
e3046511 JBG |
134 | to=$1 |
135 | shift | |
136 | sed_fix_filenames="${sed_fix_filenames}s|"`quote_for_sed "$from"`"|$to|g;" | |
137 | sed_fix_header_guards="${sed_fix_header_guards}s|"`guard "$from"`"|"`guard "$to"`"|g;" | |
252b5132 RH |
138 | done |
139 | ||
42ecbf5e | 140 | # The program to run. |
e3046511 | 141 | prog=$1 |
42ecbf5e DJ |
142 | shift |
143 | # Make any relative path in $prog absolute. | |
e3046511 | 144 | case $prog in |
42ecbf5e | 145 | [\\/]* | ?:[\\/]*) ;; |
e3046511 | 146 | *[\\/]*) prog=`pwd`/$prog ;; |
42ecbf5e DJ |
147 | esac |
148 | ||
252b5132 | 149 | dirname=ylwrap$$ |
e3046511 JBG |
150 | do_exit="cd '`pwd`' && rm -rf $dirname > /dev/null 2>&1;"' (exit $ret); exit $ret' |
151 | trap "ret=129; $do_exit" 1 | |
152 | trap "ret=130; $do_exit" 2 | |
153 | trap "ret=141; $do_exit" 13 | |
154 | trap "ret=143; $do_exit" 15 | |
252b5132 RH |
155 | mkdir $dirname || exit 1 |
156 | ||
157 | cd $dirname | |
42ecbf5e DJ |
158 | |
159 | case $# in | |
13b7343a RW |
160 | 0) "$prog" "$input" ;; |
161 | *) "$prog" "$@" "$input" ;; | |
252b5132 | 162 | esac |
42ecbf5e DJ |
163 | ret=$? |
164 | ||
165 | if test $ret -eq 0; then | |
e3046511 JBG |
166 | for from in * |
167 | do | |
168 | to=`printf '%s\n' "$from" | sed "$sed_fix_filenames"` | |
42ecbf5e DJ |
169 | if test -f "$from"; then |
170 | # If $2 is an absolute path name, then just use that, | |
e3046511 JBG |
171 | # otherwise prepend '../'. |
172 | case $to in | |
173 | [\\/]* | ?:[\\/]*) target=$to;; | |
174 | *) target=../$to;; | |
42ecbf5e DJ |
175 | esac |
176 | ||
e3046511 JBG |
177 | # Do not overwrite unchanged header files to avoid useless |
178 | # recompilations. Always update the parser itself: it is the | |
179 | # destination of the .y.c rule in the Makefile. Divert the | |
180 | # output of all other files to a temporary file so we can | |
181 | # compare them to existing versions. | |
182 | if test $from != $parser; then | |
183 | realtarget=$target | |
184 | target=tmp-`printf '%s\n' "$target" | sed 's|.*[\\/]||g'` | |
252b5132 | 185 | fi |
e3046511 JBG |
186 | |
187 | # Munge "#line" or "#" directives. Don't let the resulting | |
188 | # debug information point at an absolute srcdir. Use the real | |
189 | # output file name, not yy.lex.c for instance. Adjust the | |
190 | # include guards too. | |
191 | sed -e "/^#/!b" \ | |
192 | -e "s|$input_rx|$input_sub_rx|" \ | |
193 | -e "$sed_fix_filenames" \ | |
194 | -e "$sed_fix_header_guards" \ | |
195 | "$from" >"$target" || ret=$? | |
196 | ||
197 | # Check whether files must be updated. | |
198 | if test "$from" != "$parser"; then | |
199 | if test -f "$realtarget" && cmp -s "$realtarget" "$target"; then | |
200 | echo "$to is unchanged" | |
201 | rm -f "$target" | |
202 | else | |
203 | echo "updating $to" | |
42ecbf5e DJ |
204 | mv -f "$target" "$realtarget" |
205 | fi | |
206 | fi | |
207 | else | |
e3046511 JBG |
208 | # A missing file is only an error for the parser. This is a |
209 | # blatant hack to let us support using "yacc -d". If -d is not | |
210 | # specified, don't fail when the header file is "missing". | |
211 | if test "$from" = "$parser"; then | |
42ecbf5e DJ |
212 | ret=1 |
213 | fi | |
214 | fi | |
42ecbf5e | 215 | done |
252b5132 RH |
216 | fi |
217 | ||
218 | # Remove the directory. | |
219 | cd .. | |
220 | rm -rf $dirname | |
221 | ||
42ecbf5e DJ |
222 | exit $ret |
223 | ||
224 | # Local Variables: | |
225 | # mode: shell-script | |
226 | # sh-indentation: 2 | |
227 | # eval: (add-hook 'write-file-hooks 'time-stamp) | |
228 | # time-stamp-start: "scriptversion=" | |
229 | # time-stamp-format: "%:y-%02m-%02d.%02H" | |
13b7343a RW |
230 | # time-stamp-time-zone: "UTC" |
231 | # time-stamp-end: "; # UTC" | |
42ecbf5e | 232 | # End: |