#!/bin/bash
MYNAME=`basename $0`
PACKDB="/var/adm/packages"
INSTDB="/var/adm/scripts"


# file_exit()
# ===========
function file_exit
{
 echo
 echo Cannot add $ERR_FILE to database. Check permissions.
 echo
 exit -1
}


# fhelp()
# =======
function fhelp
{
 echo
 echo Usage:
 echo "$MYNAME [ -f ARCHIVE | --file ARCHIVE ] PACKAGE"
 echo "       - writes all files containing to PACKAGE to tgz archive"
 echo "         in the current directory or to the file ARCHIVE when"
 echo "         specified with the "\`-f\'" option."
 echo
 echo "$MYNAME -h | --help"
 echo "       - displays this usage message"   
 echo
 echo "$MYNAME -v | --version"
 echo "       - displays version information and exits"
 echo
 exit 0
}


# fver()
# determine slack version
# =======================
function fver
{ 
  if [ -f /etc/slackware-version ]; then
    cat /etc/slackware-version | cut -d. -f1,2 | sed 's/[Ss]lackware//'
  elif [ -d /usr/lib/setup ] ; then
    ls /usr/lib/setup/slack-version* | tail -1 | cut -d "-" -f 3 | cut -d. -f1,2
  fi
}
VERSION="$(fver).9 - 2004/01/08 23:47 CEST"         # date +"%Y/%m/%d %H:%M %Z"
 

# createpkg()
# ===========
function createpkg
{
  echo
  echo "Path: $PACKDB"
  echo
  typeset -i TNUMBER

  # extract file list from package database
  TNUMBER=`grep -n "FILE LIST:" $PACKDB/$ARG |cut -d":" -f1`
  TNUMBER=$TNUMBER+1

  # PACHAGE DESCRIPTION
  if [ ! -d /install ]; then
    mkdir /install || ERR_FILE=installscript file_exit
  fi
  egrep '^'"$(echo $ARG | cut -d- -f1)" $PACKDB/$ARG > /install/slack-desc

  # Files...
  FILELIST=`tail +$TNUMBER $PACKDB/$ARG | fgrep -v "install/doinst.sh"`
  
  # remove directories from FILELIST
  TARLIST=$(for i in $FILELIST ; do echo "./${i}+++" | fgrep -v "/+++" | sed -e s/+++// ; done)

  # Add the package install script to archive if it exists
  if [ -f $INSTDB/$ARG ]; then
    if [ ! -d /install ]; then
      mkdir /install || ERR_FILE=installscript file_exit
    fi
    cp $INSTDB/$ARG /install/doinst.sh || ERR_FILE=installscript file_exit
    TARLIST=${TARLIST}" ./install/doinst.sh"
  fi

  if [ -d $DIR -a -w $DIR ]; then
    ARCHIVE=$DIR/$ARG.tgz
    ARCDIR=$DIR
  elif [ -d $(dirname $PWD/$DIR) -a -w $(dirname $PWD/$DIR) ]; then
    ARCHIVE=$PWD/$DIR
    ARCDIR=$(dirname $ARCHIVE)
  elif [ -d $(dirname $DIR) -a -w $(dirname $DIR) ]; then
    ARCHIVE=$DIR
    ARCDIR=$(dirname $DIR)
  elif [ -d `dirname $DIR` -a -w `dirname $DIR` ]; then
    ARCHIVE=$DIR
    ARCDIR=$(dirname $DIR)
  else
    echo 1>&2
    echo $MYNAME: Cannot create archive $DIR. Check pathname and permissions. 1>&2
    echo 1>&2
    exit -1
  fi
  echo "== Packing files:"
  cd / && tar cvzf $ARCHIVE $TARLIST 2>/tmp/$MYNAME.errlog
  echo

  if [ -s /tmp/$MYNAME.errlog ]; then
    echo 1>&2
    echo Errors encountered while packing `basename $ARCHIVE`: 1>&2
    cat /tmp/$MYNAME.errlog 1>&2
    echo 1>&2
    rm /tmp/$MYNAME.errlog
    rm -f /install/doinst.sh
    rm -f /install/slack-desc
    return 2
  fi
  rm /tmp/$MYNAME.errlog 
  rm -f /install/doinst.sh
  rm -f /install/slack-desc


  # Add package descriptions to file 'package_descriptions'
  # if package includes a description
  
  echo "== Updating $ARCDIR/package_descriptions:"
  echo
  REALARG=$(egrep "^$(echo $ARG | cut -d- -f1)" $PACKDB/$ARG | head -1 | cut -d: -f1)
  egrep '^'"$(echo $ARG | cut -d- -f1)" $PACKDB/$ARG > $ARCDIR/$(basename $ARCHIVE .tgz).txt 

  echo
  return 0
}

if [ ! -x $PACKDB ]; then
  echo 1>&2
  echo "$MYNAME: Cannot access installation database." 1>&2
  echo "$MYNAME: Propbably not a Slackware system." 1>&2
  echo 1>&2
  exit 1
fi


case "$1" in

 "-v" | "--version")
   echo
   echo $MYNAME $VERSION
   echo
   ;;

 "-h" | "--help")
   fhelp
   ;;

 "")
   echo 1>&2
   echo "$MYNAME: argument expected" 1>&2
   echo 1>&2
   echo Try \`$MYNAME --help\' for more information. 1>&2
   echo 1>&2
   exit 1
   ;;

 "-f" | "--file")
   if [ $# -lt 2 ]; then
     echo 1>&2
     echo $MYNAME: option $1 requires an argument 1>&2
     echo 1>&2
     exit 1
   else
     echo
       ARG=$3 DIR=$2 createpkg
     echo
   fi
   ;;

 *)
   if [ -r $PACKDB/$1 ]; then
     ARG=$1 DIR=$PWD createpkg
   else
     echo 1>&2
     echo "$MYNAME: Package $1 not installed." 1>&2
     echo 1>&2
     exit 1
   fi
   ;;

esac
exit $?