#! /bin/sh
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# ylwrap - wrapper for lex/yacc invocations.
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scriptversion=2018-03-07.03; # UTC
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# Copyright (C) 1996-2020 Free Software Foundation, Inc.
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#
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# Written by Tom Tromey <tromey@cygnus.com>.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2, or (at your option)
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# any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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# As a special exception to the GNU General Public License, if you
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# distribute this file as part of a program that contains a
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# configuration script generated by Autoconf, you may include it under
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# the same distribution terms that you use for the rest of that program.
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# This file is maintained in Automake, please report
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# bugs to <bug-automake@gnu.org> or send patches to
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# <automake-patches@gnu.org>.
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get_dirname ()
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{
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case $1 in
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*/*|*\\*) printf '%s\n' "$1" | sed -e 's|\([\\/]\)[^\\/]*$|\1|';;
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# Otherwise, we want the empty string (not ".").
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esac
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}
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# guard FILE
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# ----------
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# The CPP macro used to guard inclusion of FILE.
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guard ()
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{
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printf '%s\n' "$1" \
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| sed \
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-e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' \
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-e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g' \
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-e 's/__*/_/g'
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}
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# quote_for_sed [STRING]
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# ----------------------
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# Return STRING (or stdin) quoted to be used as a sed pattern.
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quote_for_sed ()
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{
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case $# in
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0) cat;;
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1) printf '%s\n' "$1";;
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esac \
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| sed -e 's|[][\\.*]|\\&|g'
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}
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case "$1" in
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'')
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echo "$0: No files given. Try '$0 --help' for more information." 1>&2
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exit 1
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;;
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--basedir)
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basedir=$2
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shift 2
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;;
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-h|--h*)
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cat <<\EOF
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Usage: ylwrap [--help|--version] INPUT [OUTPUT DESIRED]... -- PROGRAM [ARGS]...
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Wrapper for lex/yacc invocations, renaming files as desired.
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INPUT is the input file
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OUTPUT is one file PROG generates
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DESIRED is the file we actually want instead of OUTPUT
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PROGRAM is program to run
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ARGS are passed to PROG
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Any number of OUTPUT,DESIRED pairs may be used.
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Report bugs to <bug-automake@gnu.org>.
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EOF
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exit $?
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;;
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-v|--v*)
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echo "ylwrap $scriptversion"
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exit $?
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;;
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esac
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# The input.
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input=$1
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shift
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# We'll later need for a correct munging of "#line" directives.
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input_sub_rx=`get_dirname "$input" | quote_for_sed`
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case $input in
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[\\/]* | ?:[\\/]*)
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# Absolute path; do nothing.
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;;
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*)
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# Relative path. Make it absolute.
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input=`pwd`/$input
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;;
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esac
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input_rx=`get_dirname "$input" | quote_for_sed`
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# Since DOS filename conventions don't allow two dots,
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# the DOS version of Bison writes out y_tab.c instead of y.tab.c
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# and y_tab.h instead of y.tab.h. Test to see if this is the case.
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y_tab_nodot=false
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if test -f y_tab.c || test -f y_tab.h; then
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y_tab_nodot=true
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fi
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# The parser itself, the first file, is the destination of the .y.c
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# rule in the Makefile.
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parser=$1
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# A sed program to s/FROM/TO/g for all the FROM/TO so that, for
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# instance, we rename #include "y.tab.h" into #include "parse.h"
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# during the conversion from y.tab.c to parse.c.
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sed_fix_filenames=
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# Also rename header guards, as Bison 2.7 for instance uses its header
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# guard in its implementation file.
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sed_fix_header_guards=
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while test $# -ne 0; do
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if test x"$1" = x"--"; then
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shift
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break
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fi
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from=$1
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# Handle y_tab.c and y_tab.h output by DOS
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if $y_tab_nodot; then
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case $from in
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"y.tab.c") from=y_tab.c;;
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"y.tab.h") from=y_tab.h;;
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esac
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fi
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shift
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to=$1
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shift
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sed_fix_filenames="${sed_fix_filenames}s|"`quote_for_sed "$from"`"|$to|g;"
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sed_fix_header_guards="${sed_fix_header_guards}s|"`guard "$from"`"|"`guard "$to"`"|g;"
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done
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# The program to run.
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prog=$1
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shift
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# Make any relative path in $prog absolute.
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case $prog in
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[\\/]* | ?:[\\/]*) ;;
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*[\\/]*) prog=`pwd`/$prog ;;
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esac
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dirname=ylwrap$$
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do_exit="cd '`pwd`' && rm -rf $dirname > /dev/null 2>&1;"' (exit $ret); exit $ret'
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trap "ret=129; $do_exit" 1
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trap "ret=130; $do_exit" 2
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trap "ret=141; $do_exit" 13
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trap "ret=143; $do_exit" 15
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mkdir $dirname || exit 1
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cd $dirname
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case $# in
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0) "$prog" "$input" ;;
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*) "$prog" "$@" "$input" ;;
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esac
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ret=$?
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if test $ret -eq 0; then
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for from in *
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do
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to=`printf '%s\n' "$from" | sed "$sed_fix_filenames"`
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if test -f "$from"; then
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# If $2 is an absolute path name, then just use that,
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# otherwise prepend '../'.
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case $to in
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[\\/]* | ?:[\\/]*) target=$to;;
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*) target=../$to;;
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esac
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# Do not overwrite unchanged header files to avoid useless
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# recompilations. Always update the parser itself: it is the
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# destination of the .y.c rule in the Makefile. Divert the
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# output of all other files to a temporary file so we can
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# compare them to existing versions.
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if test $from != $parser; then
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realtarget=$target
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target=tmp-`printf '%s\n' "$target" | sed 's|.*[\\/]||g'`
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fi
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# Munge "#line" or "#" directives. Don't let the resulting
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# debug information point at an absolute srcdir. Use the real
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# output file name, not yy.lex.c for instance. Adjust the
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# include guards too.
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sed -e "/^#/!b" \
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-e "s|$input_rx|$input_sub_rx|" \
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-e "$sed_fix_filenames" \
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-e "$sed_fix_header_guards" \
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"$from" >"$target" || ret=$?
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# Check whether files must be updated.
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if test "$from" != "$parser"; then
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if test -f "$realtarget" && cmp -s "$realtarget" "$target"; then
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echo "$to is unchanged"
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rm -f "$target"
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else
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echo "updating $to"
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mv -f "$target" "$realtarget"
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fi
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fi
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else
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# A missing file is only an error for the parser. This is a
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# blatant hack to let us support using "yacc -d". If -d is not
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# specified, don't fail when the header file is "missing".
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if test "$from" = "$parser"; then
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ret=1
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fi
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fi
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done
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fi
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# Remove the directory.
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cd ..
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rm -rf $dirname
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exit $ret
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# Local Variables:
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# mode: shell-script
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# sh-indentation: 2
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# eval: (add-hook 'before-save-hook 'time-stamp)
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# time-stamp-start: "scriptversion="
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# time-stamp-format: "%:y-%02m-%02d.%02H"
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# time-stamp-time-zone: "UTC0"
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# time-stamp-end: "; # UTC"
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# End:
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