#!/bin/bash

#############################################################################

# Copyright (c) 2008,2009 Novell, Inc.

# All Rights Reserved.

#

# This program is free software; you can redistribute it and/or

# modify it under the terms of version 2 of the GNU General Public License as

# published by the Free Software Foundation.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.   See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, contact Novell, Inc.

#

# To contact Novell about this file by physical or electronic mail,

# you may find current contact information at www.novell.com

#############################################################################

unset FILE

export EDITOR=${EDITOR:=vim}

[ -z "$GIT_COMMITTER_EMAIL" ] && GIT_COMMITTER_EMAIL=$(git config  --get user.email)

if [ -n "$1" ]; then

    if [ -f "$1" ]; then

        FILE=$1

    else

        if [ -d "$1" ]; then

            cd $1

        else

            FILE=${1##*/}.changes

        fi

    fi

fi

if [ -z "$FILE" ]; then

    echo "Usage: ${0##*/} [filename[.changes]|path [file_with_comment]]"

    echo "       If no <filename> is given, exactly one *.changes or"

    echo "       *.spec file has to be in the cwd or in <path>."

    echo

    exit 1

fi

COMMENT_FILE=$2

tmpfile=$(mktemp /tmp/${0##*/}.XXXXXX)

trap "rm -f $lockfile $tmpfile" EXIT

{

    timestamp=$(LC_ALL=POSIX TZ=Europe/Berlin date)

    committer=${SUSE_COMMITTER_EMAIL:-${GIT_COMMITTER_EMAIL:-$(id -un)@suse.de}}

    echo "-------------------------------------------------------------------"

    echo "$timestamp - $committer"

    echo

    if  [ -n "$CHANGE_MESSAGE" ]; then

        echo "- $CHANGE_MESSAGE"

    elif [ -z "$COMMENT_FILE" ]; then

        echo "- "

    else        

        cat $COMMENT_FILE

    fi

    echo

    if [ -f "$FILE" ]; then

        cat $FILE

    fi

} >> $tmpfile || exit 1

if [ -z "$COMMENT_FILE" ]; then

    lines=1

    CHKSUM_BEFORE=$(md5sum $tmpfile | awk '{print $1}')

else

    lines=$(wc -l $COMMENT_FILE | awk '{print $1}')

    CHKSUM_BEFORE=has_changed

fi

if test -z "$CHANGE_MESSAGE"; then

    $EDITOR +$((3+lines)) $tmpfile

    if [ "$CHKSUM_BEFORE" = "$(md5sum $tmpfile | awk '{print $1}')" ]; then

        exit 1

    fi

fi

cat $tmpfile > $FILE