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#!/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.

if test -z $WRKSRC; then
    if test -d `pwd`/work; then
        WRKSRC=`pwd`/work
    fi
fi

if test -z $PATCHDIR; then
    if test -d `pwd`/files; then
        PATCHDIR=`pwd`/files
    fi
fi

if test -z $PATCH_LIST; then
    if test -d $PATCHDIR; then
        PATCH_LIST=$PATCHDIR/patch-*
    fi
fi

# Find out all .orig files and strip the name to what diff will use
cd $WRKSRC && find . -type f -name '*.orig' | fgrep -v $WRKSRC | \
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 $WRKSRC && diff ${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 $WRKSRC && diff ${DIFF_ARGS} -u $file.orig $file) } >$patchname
    edit="$edit $patchname"
    accounted="$accounted $patchname"
done

# Verify all patches accounted for
for i in *
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: update-patches,v 1.3 2000/06/09 17:08:37 espie Exp $ and similar bugs in all those patch files.
for i in $accounted
do
    if sed -e '/1,^---/ d' $i|grep '$(Id|FreeBSD'
    then
        echo 1>&2 "Problem with $i: CVS tag found in patch"
    fi
done

echo $edit
}
exit 0