#!/bin/bash

# Copyright (c) 2003 Vinai Kopp
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# 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, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA


# configuration section

# the path to the diff file
PATCHFILE=/path/to/exim-tls-to-exim-tls-mysql.diff

# directory to build the new deb in
# all temporary files will be deleted when finished
TMPDIR="/tmp"

# your name and email
# escape any special characters - it is used in a perl regex
MAINT="Your Name <your_email\@example.com>"

# you probably don't need to change any of the rest

# in this directory the new deb will be placed
DESTDIR=$(pwd)

# in these three files the current status of the build process is kept
# they are read by the script on the server
STATUSFILE=$DESTDIR/status
LOGFILE=$DESTDIR/log
RESFILE=$DESTDIR/res

# end config


# internaly used variables
DIR=""
VERSION=""
SEQ=0
PATH=/bin:/usr/bin:/usr/local/bin
export PATH

#
# functions
#

cleanup() {
    if [ -d $TMPDIR ]; then
	rm -rf $TMPDIR
    fi
}

log() {
    echo -e "$(date)\t $1" >> $LOGFILE
}

set-status() {
    echo $1 > $STATUSFILE
}


#
# start of script
#

if [ "$UID" == "0" ]; then
    echo "Don't run this script as root!" >&2
    set-status "error"
    exit 1
fi

if [ -f $LOGFILE ]; then rm $LOGFILE; fi
log "starting..."
set-status "preparing"

while [ -e "$TMPDIR/rebuild-exim-$SEQ" ]; do
    SEQ=$((SEQ +1))
done

TMPDIR="$TMPDIR/rebuild-exim-$SEQ"
mkdir -p $TMPDIR
cd $TMPDIR

log "updating file list"
sudo /usr/bin/apt-get update

log "downloading sources to directory is $TMPDIR"
apt-get source exim-tls


for i in exim-tls*; do
    if [ -f $i ]; then
	if echo $i | egrep -qs 'exim-tls_.+.orig.tar.gz'; then
	    mmv 'exim-tls_*.orig.tar.gz' 'exim-tls-mysql_#1.orig.tag.gz'
	fi

    elif [ -d $i ]; then
	if echo $i | egrep -qs 'exim-tls-.*'; then
	    VERSION=$(echo $i | cut -d '-' -f 3);
	    DIR="exim-tls-mysql-${VERSION}"
	    mv $i $DIR
	fi
    fi
done

log "upstream version: $VERSION"

if [ -z "$DIR" ]; then
    log "source directory $DIR not found!"
    set-status "error"
    cleanup
    exit 1
fi

cd $DIR

log "patching exim source package."
patch -p1 < $PATCHFILE
if [ $? -gt 1 ]; then
    log "exim-tls-to-exim-tls-mysql.diff patch failed"
    set-status error
    cleanup
    exit 1
fi

log "patching changelog"
perl -pi -e 'if (!$a && /^exim-tls /) { $a++; s/^exim-tls /exim-tls-mysql /; } elsif (1 == $a && /^ -- .+<[^@]+@[^>]+>/) {$a++;s/-- .+<[^@]+@[^>]+>/-- '$MAINT'/; }' debian/changelog

log "starting build of exim-tls-mysql"
set-status "building"
dpkg-buildpackage -rfakeroot -us -uc


cd ..
DEB=$(ls *.deb 2>/dev/null)
if [ ! -f $DEB ]; then
    log "Can't fin deb $DEB"
    set-status "error"
    cleanup
    exit 1
fi
mv $DEB $DESTDIR

log "created $DESTDIR/$DEB"

cd $DESTDIR

log "Removing temporary files"
cleanup

set-status "ok"
echo -n "$DEB" > $RESFILE
log "done"

exit 0