#!/bin/sh

# $OpenBSD: update-patches,v 1.8 2002/07/24 11:54:21 nino 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 $PATCHORIG files and strip the name to what diff will use
cd $WRKDIST && find . -type f -name '*'${PATCHORIG} | fgrep -v $DISTORIG | \
sed -e "s,^./\(.*\)\.${PATCHORIG#.*}\$,\1," | {
while read file 
do
    if cmp $WRKDIST/$file $WRKDIST/$file$PATCHORIG >/dev/null 2>&1; then
    	echo 1>&2 "$file and $file$PATCHORIG are identical"
    	continue
    fi
    if ! [ -f $WRKDIST/$file ]; then
		echo 1>&2 "$file does not exist"
		continue
	fi
    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 $i in \
	*${PATCHORIG}|*.rej|*~) ;;
	*) # Patch found. Is this the one ?
	    if grep "^--- $file$PATCHORIG" $i >/dev/null
	    then
		accounted="$accounted $i"
		# found it, splice before diff part with diff
		esc=`echo $file | sed -e 's,/,\\\\/,g'`
		{ sed -e "/^--- $esc$PATCHORIG/,\$ d" <$i
		    (cd $WRKDIST && diff ${DIFF_ARGS} -u -p $file$PATCHORIG $file) } >$i.new
		# did it change ? mark it as changed
		if diff ${DIFF_ARGS} -u \
			--ignore-matching-lines="^--- $file$PATCHORIG	.*" \
		    --ignore-matching-lines="^+++ $file	.*" $i $i.new 1>&2
		then
		    rm $i.new
		else
		    echo 1>&2 "Patch $i for $file updated"
		    mv $i $i$PATCHORIG
		    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 $patchname"
    { echo "$"OpenBSD$; \
	(cd $WRKDIST && diff ${DIFF_ARGS} -u -p $file$PATCHORIG $file) }>$patchname
    edit="$edit $patchname"
    accounted="$accounted $patchname"
done

# Verify all patches accounted for
cd $PATCHDIR
for i in *
do
    [ -f $i ] || continue
    case $i in \
    *$PATCHORIG|*.rej|*~) ;;
    *)
    	if grep '^\\ No newline at end of file' $i >/dev/null; then
		echo 1>&2 "*** Patch $i needs manual intervention"
	fi
	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: update-patches,v 1.8 2002/07/24 11:54:21 nino Exp $ and similar bugs in all those patch files.
for i in $accounted
do
    if sed -e '/1,^---/ d' $i|grep '$(Id|OpenBSD'
    then
	    echo 1>&2 "Problem with $i: CVS tag found in patch"
    fi
done

echo $edit
}
exit 0