#!/bin/sh
#
#	$NetBSD: src2nbcompat,v 1.11 2018/08/22 20:48:38 maya Exp $
#
# Copyright (c) 2003 The NetBSD Foundation, Inc.
# All rights reserved.
#
# This code is derived from software contributed to The NetBSD Foundation
# by Johnny C. Lam.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#

if [ $# -lt 2 ]; then echo "src2nbcompat src dest"; exit 1; fi

src=$1
dest=$2

case $src in
/*)	;;
*)	src=`pwd`/$src ;;
esac

case $dest in
/*)	;;
*)	dest=`pwd`/$dest ;;
esac

make_dir()
{
	_d="$1"
	_destdir="$2"
	_newd=${3-`echo $_d | sed 's,^\./,,'`}
	case $_newd in
	*CVS)
		;;
	.)
		;;
	*)
		mkdir -p $_destdir/$_newd
		;;
	esac
}

copy_file()
{
	_f="$1"
	_destdir="$2"
	_newf=${3-`echo $_f | sed 's,^\./,,'`}
	case $_newf in
	*CVS/*)
		# Skip copying over any CVS information.
		;;
	*Makefile|*Makefile.inc)
		# Skip copying over the Makefiles since we'll be using
		# a GNU autoconf-based build infrastructure.
		;;
	*.sh)
		# Assume shell scripts will require variable substitution
		# by the GNU configure script.
		#
		cp $_f $_destdir/$_newf.in
		;;
	*.[ch])
		# Add "#include <nbcompat.h>" before the first system
		# header inclusion.  Protect all system headers with
		# "#if HAVE_FOO_H ... #endif" guards.
		#
		awk '							\
			BEGIN { config = 0; nbcompat = 0 }		\
			/^#[ 	]*if[ 	]+HAVE_NBTOOL_CONFIG_H/ {	\
				if (config == 0) {			\
					print "#if HAVE_CONFIG_H";	\
					print "#include \"config.h\"";	\
					print "#endif";			\
					config = 1;			\
				}					\
			}						\
			/^#[ 	]*include[ 	]+/ {			\
				if (config == 0) {			\
					print "#if HAVE_CONFIG_H";	\
					print "#include \"config.h\"";	\
					print "#endif";			\
					config = 1;			\
				}					\
			}						\
			/^#[ 	]*include[ 	]+<[^ 	]*>/ {		\
				guard = $0;				\
				sub("#[ 	]*include[ 	]+<", "HAVE_", guard); \
				sub(">.*", "", guard);			\
				gsub("[-/.]", "_", guard);		\
				guard = toupper(guard);			\
				if (nbcompat == 0) {			\
					print "#include <nbcompat.h>";	\
					nbcompat = 1;			\
				};					\
				print "#if " guard;			\
				print $0;				\
				print "#endif";				\
				next;					\
			}						\
			{ print }					\
		' $_f > $_destdir/$_newf.tmp
		if [ -f $_destdir/$_newf ] &&				\
		   diff -q -I "\$Net""BSD.*\$" $_destdir/$_newf $_destdir/$_newf.tmp >/dev/null; then
			rm -f $_destdir/$_newf.tmp
		else
			rm -f $_destdir/$_newf
			mv $_destdir/$_newf.tmp $_destdir/$_newf
		fi
		;;
	*.[1-9])
		# Copy the manpage over, and generate the catpage.
		cp $_newf $_destdir/$_newf.tmp
		if [ -f $_destdir/$_newf ] &&				\
		   diff -q -I "\$Net""BSD.*\$" $_destdir/$_newf $_destdir/$_newf.tmp >/dev/null; then
			rm -f $_destdir/$_newf.tmp
		else
			mv -f $_destdir/$_newf.tmp $_destdir/$_newf
			_catf=`echo $_newf | sed 's,\.\([1-9]\),.cat\1,'`
			nroff -mandoc $_newf > $_destdir/$_catf
		fi
		;;
	*)
		# Everything else just gets copied verbatim.
		cp $_newf $_destdir/$_newf.tmp
		if [ -f $_destdir/$_newf ] &&				\
		   diff -q -I "\$Net""BSD.*\$" $_destdir/$_newf $_destdir/$_newf.tmp >/dev/null; then
			rm -f $_destdir/$_newf.tmp
		else
			mv -f $_destdir/$_newf.tmp $_destdir/$_newf
		fi
		;;
	esac
}

if [ -f "$src" ]; then
	srcdir=`dirname $src`
	destdir=`dirname $dest`
else
	srcdir="$src"
	destdir="$dest"
fi

echo "Preparing directory $destdir"
mkdir -p $destdir

if [ -f "$src" ]; then
	echo "Copying $src to $dest"
	cd $srcdir
	copy_file `basename $src` $destdir `basename $dest`
else
	echo "Copying files and directories to $destdir"
	cd $srcdir
	find . -type d -print |
	while read d; do
		make_dir $d $destdir
	done
	find . \! -type d -print |
	while read f; do
		copy_file $f $destdir
	done
fi