#!/bin/sh

# $OpenBSD: update-patches,v 1.3 2000/06/09 17:08:37 espie Exp $
# Copyright (c) 2000
# Marc Espie.  All rights reserved.
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Neither the name of OpenBSD nor the names of its contributors
#    may be used to endorse or promote products derived from this software
#    without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY ITS AUTHOR AND THE OpenBSD project ``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 REGENTS 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.

# Find out all .orig files and strip the name to what diff will use
cd $PATCH_WRKSRC && find . -type f -name '*.orig' | fgrep -v $DISTORIG | \
sed -e "s,^./\(.*\)\.orig\$,\1," | {
while read file
do
    echo 1>&2 "Processing $file"
    # look in patchdir for an existing patchfile matching this
    mkdir -p $PATCHDIR
    cd $PATCHDIR
    for i in ${PATCH_LIST}
    do
	# Ignore non-files, or old backup
	[ -f $i ] || continue
	case $i in \
	*.orig|*.rej|*~) ;;
	*) # Patch found. Is this the one ?
	    if grep "^--- $file.orig" $i >/dev/null
	    then
		accounted="$accounted $i"
		# found it, splice before diff part with diff
		esc=`echo $file | sed -e 's,/,\\\\/,g'`
		{ sed -e "/^--- $esc.orig/,\$ d" <$i
		    (cd $PATCH_WRKSRC && diff -p ${DIFF_ARGS} -u $file.orig $file) } >$i.new
		# did it change ? mark it as changed
		if diff ${DIFF_ARGS} -u --ignore-matching-lines="^--- $file.orig	.*" \
		    --ignore-matching-lines="^+++ $file	.*" $i $i.new 1>&2
		then
		    rm $i.new
		else
		    echo 1>&2 "Patch $i for $file updated"
		    mv $i $i.orig
		    mv $i.new $i
		    edit="$edit $i"
		fi
		continue 2
	    fi;;
	esac
    done
    # Build a sensible name for the patch file
    patchname=patch-`echo $file|sed -e s,/,_,g`
    echo 1>&2 "No patch-* found for $file, creating $patchname"
    (cd $PATCH_WRKSRC && diff -p ${DIFF_ARGS} -u $file.orig $file) >$patchname
    edit="$edit $patchname"
    accounted="$accounted $patchname"
done

# Verify all patches accounted for
for i in ${PATCHDIR}/*
do
    [ -f $i ] || continue
    case $i in \
    *.orig|*.rej|*~) ;;
    *)
	for j in $accounted
	do
	    if [ $j = $i ]
	    then
		continue 2
	    fi
	done
	echo 1>&2 "*** Patch $i not accounted for.";;
    esac
done

# Check for $Id and similar bugs in all those patch files.
for i in $accounted
do
    if sed -e '/1,^---/ d' $i|egrep '$(Id|FreeBSD)'
    then
	    echo 1>&2 "Problem with $i: CVS tag found in patch"
    fi
done

echo $edit
}
exit 0