#!/bin/sh
#(C) July 2001 Thomas Guettler http://www.thomas-guettler.de
#Feedback is Welcome!
#This script is in the public domain
#
#Create a debian mirror from a CD set
#It only handels binary packages
#

# Notes:
# ------
# + CD must either have "/debian/pool" or "/pool"
# + scanpackages: get the files from ftp.debian.org/debian/indices
#    zcat *.gz | sort | gzip > override.gz 
# + your /etc/apt/sources.list should look like:
#   deb file:/debian_mirror ./
# + Warnings abot repeated packages while doing "scanpackages" can
#   be ignored



#TODO: 
#  --> exclude file: file of regex's matching files which should 
#      not be copied to the mirror (see ~/.debian-cd2mirror-exclude) 

###Start User Config

###End User Config


function usage(){
  SCRIPT_NAME=`basename $0`
  echo "$SCRIPT_NAME: Create a Debian mirror from a CD set"
  echo "Usage: "
  echo "  $SCRIPT_NAME copy cdrom_dir mirror_dir"
  echo "  $SCRIPT_NAME scanpackages mirror_dir override_file"
  echo
  echo "  copy: Copies the packages to the mirror"
  echo "    cdrom_dir: where your cdrom gets mounted (/cdrom)"
  echo "    mirror_dir: directory of your mirror (/debian)"
  echo "  scanpackages: Create Packages.gz via dpkg-scanpackages "
  echo "    mirror_dir: directory of your mirror (/debian)"
  echo "    override_file: You get this file from the debian mirror"
  echo "      (/debian/indices/override.VERSION.*.gz)"
  echo "      see note in this script, too"
  echo
  echo " Copy all CDs to your mirror with \"copy\". Then you might want"
  echo "  to add your own packages to the mirror. Then use "
  echo "  \"scanpackages\" to create the Packages.gz files"
  echo 
  exit 1
}

function copy(){ 
  mount $CDROM 
  CDROM_DEBIAN=$CDROM/debian
  if [ ! -d $CDROM/pool ]; then
    if [ ! -d $CDROM/debian/pool ]; then
      echo "Error: CD does not have a pool directory. Exiting"
      umount $CDROM
      exit 1
    else
      CDROM_DEBIAN=$CDROM/debian
    fi
  else
    CDROM_DEBIAN=$CDROM
  fi
  echo "Copying from $CDROM_DEBIAN to $MIRROR."
  echo "This takes 3-14 minutes depending on disk speed"
  echo "Start: " `date`
  if [ -r $CDROM/.disk/info ]; then
    CD_INFO=`cat $CDROM/.disk/info`
  else
    CD_INFO="unkown"
  fi
  echo "Coping packages from $CD_INFO onto mirror"
  rsync -a --exclude Packages \
            --exclude Packages.gz \
            --exclude Packages.cd \
            --exclude Packages.cd.gz \
        $CDROM_DEBIAN/dists $CDROM_DEBIAN/pool $MIRROR

# old way. Without rsync
#  (cd $CDROM_DISTS && tar clf - --exclude Packages \
#                          --exclude Packages.gz \
#                          --exclude Packages.cd \
#                          --exclude Packages.cd.gz . ) \
#    | (cd $MIRROR/dists && tar xfp - )

  echo `date`: added packages from "$CD_INFO" >> $MIRROR/debian-cd2mirror.log
  echo "End:   " `date`
  umount $CDROM
  echo "Repeat this for every CD you want to add to the mirror"
  #now beep a little
  (echo -ne \\a; sleep 1;echo -ne \\a; sleep 1;echo -ne \\a; sleep 1;
   echo -ne \\a; sleep 1;echo -ne \\a; sleep 1;echo -ne \\a; sleep 1;
   echo -ne \\a; sleep 1;echo -ne \\a; sleep 1;echo -ne \\a; sleep 1;)&
}

function scanpackages(){
  echo "Creating Packages.gz with dpkg-scanpackages"
  echo "This takes about 18-30 minutes on my computer"
  echo "Start: " `date`
  #for p_dir in `find . | grep -E 'binary-[^/]*$'`; do
  #  p_file=$p_dir/Packages
  #  dpkg-scanpackages $p_dir $OVERRIDE_FILE > \
  #     $p_file
  #  gzip -c $p_file > $p_file.gz
  #  echo "$p_file gzipped"
  #done
  cd $MIRROR
  dpkg-scanpackages ./ $OVERRIDE_FILE | gzip > Packages.gz
  echo "End: " `date`
}

### Main

  
type dpkg-scanpackages 1>/dev/null 2>&1
if [ $? != "0" ]; then
    echo "dpkg-scanpackages is not installed: Install dpkg-dev"
    exit 1
fi

if [ $# -lt 3 ]; then
  usage
fi

if [ $1 = "copy" ]; then
  CDROM=$2
  MIRROR=$3
  copy
elif [ $1 = "scanpackages" ];then
  MIRROR=$2
  OVERRIDE_FILE=$3
  scanpackages
else
  usage
fi