#!/bin/sh
# $Id: rsync_slackware_patches.sh,v 1.3 2005/09/11 14:00:32 root Exp root $
#-----------------------------------------------------------------------------
# Program name:
#   rsync_slackware_patches.sh
# Purpose:
#   Keep the /patches tree for a Slackware release in sync with a master
#   server. See the output of the "rsync_slackware_patches.sh -h" command
#   for the available command-line switches.
# Author:
#   Eric Hameleers <alien@slackware.com>
# Date:
#   29jul2005
#-----------------------------------------------------------------------------

BN=`basename $0`
SLACKDEF=10.1
SLACKTREE="/home/ftp/pub/Linux/Slackware"
VERBOSE=1

while getopts ":hnr:q" Option
do
  case $Option in
    h ) echo "Parameters are:"
        echo "  -h           This help."
        echo "  -n           Rsync dry-run (don't download anything)."
        echo "  -r <release> Act on Slackware version <release>. The default"
        echo "               is to download patches for Slackware ${SLACKDEF}"
        echo "  -q           Non-verbose output (for cron jobs)."
        exit
        ;;
    n ) echo "Performing a dry-run!" ; RSYNCOPTS="${RSYNCOPTS} -n"
            ;;
    r ) VERSION=${OPTARG}
        ;;
    q ) VERBOSE=0
        ;;
    * ) ;;   # DEFAULT
  esac
done

# End of option parsing.
shift $(($OPTIND - 1))

#  $1 now references the first non option item supplied on the command line
#  if one exists.

VERSION=${VERSION:-${SLACKDEF}}
[ ${VERBOSE} -eq 1 ] && RSYNCVERBOSE="-v" || RSYNCVERBOSE="-q"

[ ${VERBOSE} -eq 1 ] && echo "[$BN:] Syncing patches for version '${VERSION}' ..."

if [ ! -d ${SLACKTREE}/slackware-${VERSION}/patches ]; then
  echo "[$BN:] Target directory ${SLACKTREE}/slackware-${VERSION}/patches does not exist!"
  echo "[$BN:] Please create it first, and then re-run this script."
  exit 1
fi
cd ${SLACKTREE}/slackware-$VERSION/patches

# Record time of last modification of ChangeLog.txt (it might not yet be there!)
LASTMOD=`stat -c %Y ChangeLog.txt 2>/dev/null`
LASTMOD=${LASTMOD:-0}

# Keep a copy of ChangeLog.txt for feedback in case of updates:
TMPFILE=`mktemp /tmp/ChangeLog.XXXXXX`
TMPFILE=${TMPFILE:-/tmp/ChangeLog.txt.$$}
cat ChangeLog.txt > $TMPFILE 2>/dev/null

[ ${VERBOSE} -eq 1 ] && echo "[$BN:] Here we go..."

rsync ${RSYNCOPTS} ${RSYNCVERBOSE} -az --delete slackware.mirrors.tds.net::slackware/slackware-$VERSION/patches/ .

[ ${VERBOSE} -eq 1 ] && echo "[$BN:] Exit status: $?"
[ ${VERBOSE} -eq 1 ] && echo "[$BN:] Done rsync-ing."

# Compare time of last modification of the ChangeLog.txt to what we had:
NEWMOD=`stat -c %Y ChangeLog.txt`

if [ $LASTMOD -ne $NEWMOD ]; then
  echo "[$BN:] New patches have arrived for Slackware ${VERSION} !"
  echo
  echo "......................................................................."
  echo
  diff $TMPFILE ChangeLog.txt
elif [ ${VERBOSE} -eq 1 ]; then
  echo "[$BN:] No change detected in the ChangeLog.txt."
fi

# Clean up:
[ ${VERBOSE} -eq 1 ] && echo "[$BN:] Removing temporary file '$TMPFILE'."
rm -f $TMPFILE

[ ${VERBOSE} -eq 1 ] && echo "[$BN:] Done!"