ylwrap - enscript - GNU Enscript
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---
ylwrap (6860B)
---
1 #! /bin/sh
2 # ylwrap - wrapper for lex/yacc invocations.
3
4 scriptversion=2018-03-07.03; # UTC
5
6 # Copyright (C) 1996-2021 Free Software Foundation, Inc.
7 #
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
21 # along with this program. If not, see <https://www.gnu.org/licenses/>.
22
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.
27
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
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
64 case "$1" in
65 '')
66 echo "$0: No files given. Try '$0 --help' for more information." 1>&2
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 ;;
95 esac
96
97
98 # The input.
99 input=$1
100 shift
101 # We'll later need for a correct munging of "#line" directives.
102 input_sub_rx=`get_dirname "$input" | quote_for_sed`
103 case $input in
104 [\\/]* | ?:[\\/]*)
105 # Absolute path; do nothing.
106 ;;
107 *)
108 # Relative path. Make it absolute.
109 input=`pwd`/$input
110 ;;
111 esac
112 input_rx=`get_dirname "$input" | quote_for_sed`
113
114 # Since DOS filename conventions don't allow two dots,
115 # the DOS version of Bison writes out y_tab.c instead of y.tab.c
116 # and y_tab.h instead of y.tab.h. Test to see if this is the case.
117 y_tab_nodot=false
118 if test -f y_tab.c || test -f y_tab.h; then
119 y_tab_nodot=true
120 fi
121
122 # The parser itself, the first file, is the destination of the .y.c
123 # rule in the Makefile.
124 parser=$1
125
126 # A sed program to s/FROM/TO/g for all the FROM/TO so that, for
127 # instance, we rename #include "y.tab.h" into #include "parse.h"
128 # during the conversion from y.tab.c to parse.c.
129 sed_fix_filenames=
130
131 # Also rename header guards, as Bison 2.7 for instance uses its header
132 # guard in its implementation file.
133 sed_fix_header_guards=
134
135 while test $# -ne 0; do
136 if test x"$1" = x"--"; then
137 shift
138 break
139 fi
140 from=$1
141 # Handle y_tab.c and y_tab.h output by DOS
142 if $y_tab_nodot; then
143 case $from in
144 "y.tab.c") from=y_tab.c;;
145 "y.tab.h") from=y_tab.h;;
146 esac
147 fi
148 shift
149 to=$1
150 shift
151 sed_fix_filenames="${sed_fix_filenames}s|"`quote_for_sed "$from"`"|$to|g;"
152 sed_fix_header_guards="${sed_fix_header_guards}s|"`guard "$from"`"|"`guard "$to"`"|g;"
153 done
154
155 # The program to run.
156 prog=$1
157 shift
158 # Make any relative path in $prog absolute.
159 case $prog in
160 [\\/]* | ?:[\\/]*) ;;
161 *[\\/]*) prog=`pwd`/$prog ;;
162 esac
163
164 dirname=ylwrap$$
165 do_exit="cd '`pwd`' && rm -rf $dirname > /dev/null 2>&1;"' (exit $ret); exit $ret'
166 trap "ret=129; $do_exit" 1
167 trap "ret=130; $do_exit" 2
168 trap "ret=141; $do_exit" 13
169 trap "ret=143; $do_exit" 15
170 mkdir $dirname || exit 1
171
172 cd $dirname
173
174 case $# in
175 0) "$prog" "$input" ;;
176 *) "$prog" "$@" "$input" ;;
177 esac
178 ret=$?
179
180 if test $ret -eq 0; then
181 for from in *
182 do
183 to=`printf '%s\n' "$from" | sed "$sed_fix_filenames"`
184 if test -f "$from"; then
185 # If $2 is an absolute path name, then just use that,
186 # otherwise prepend '../'.
187 case $to in
188 [\\/]* | ?:[\\/]*) target=$to;;
189 *) target=../$to;;
190 esac
191
192 # Do not overwrite unchanged header files to avoid useless
193 # recompilations. Always update the parser itself: it is the
194 # destination of the .y.c rule in the Makefile. Divert the
195 # output of all other files to a temporary file so we can
196 # compare them to existing versions.
197 if test $from != $parser; then
198 realtarget=$target
199 target=tmp-`printf '%s\n' "$target" | sed 's|.*[\\/]||g'`
200 fi
201
202 # Munge "#line" or "#" directives. Don't let the resulting
203 # debug information point at an absolute srcdir. Use the real
204 # output file name, not yy.lex.c for instance. Adjust the
205 # include guards too.
206 sed -e "/^#/!b" \
207 -e "s|$input_rx|$input_sub_rx|" \
208 -e "$sed_fix_filenames" \
209 -e "$sed_fix_header_guards" \
210 "$from" >"$target" || ret=$?
211
212 # Check whether files must be updated.
213 if test "$from" != "$parser"; then
214 if test -f "$realtarget" && cmp -s "$realtarget" "$target"; then
215 echo "$to is unchanged"
216 rm -f "$target"
217 else
218 echo "updating $to"
219 mv -f "$target" "$realtarget"
220 fi
221 fi
222 else
223 # A missing file is only an error for the parser. This is a
224 # blatant hack to let us support using "yacc -d". If -d is not
225 # specified, don't fail when the header file is "missing".
226 if test "$from" = "$parser"; then
227 ret=1
228 fi
229 fi
230 done
231 fi
232
233 # Remove the directory.
234 cd ..
235 rm -rf $dirname
236
237 exit $ret
238
239 # Local Variables:
240 # mode: shell-script
241 # sh-indentation: 2
242 # eval: (add-hook 'before-save-hook 'time-stamp)
243 # time-stamp-start: "scriptversion="
244 # time-stamp-format: "%:y-%02m-%02d.%02H"
245 # time-stamp-time-zone: "UTC0"
246 # time-stamp-end: "; # UTC"
247 # End: