#!/bin/sh
# Functions which perform the extraction / installation of system to disk

. ${BACKEND}/functions-mountoptical.sh

# Performs the extraction of data to disk from a uzip or tar archive
start_extract_uzip_tar()
{
  if [ -z "$INSFILE" ]
  then
    exit_err "ERROR: Called extraction with no install file set!"
  fi

  # Check if we have a .count file, and echo it out for a front-end to use in progress bars
  if [ -e "${INSFILE}.count" ]
  then
    echo "INSTALLCOUNT: `cat ${INSFILE}.count`"
  fi

  # Check if we are doing an upgrade, and if so use our exclude list
  if [ "${INSTALLMODE}" = "upgrade" ]
  then
   TAROPTS="-X ${PROGDIR}/conf/exclude-from-upgrade"
  else
   TAROPTS=""
  fi

  echo_log "pc-sysinstall: Starting Extraction"

  case ${PACKAGETYPE} in
   uzip) # Start by mounting the uzip image
         MDDEVICE=`mdconfig -a -t vnode -o readonly -f ${INSFILE}`
         mkdir -p ${FSMNT}.uzip
         mount -r /dev/${MDDEVICE}.uzip ${FSMNT}.uzip
         if [ "$?" != "0" ]
         then
           exit_err "ERROR: Failed mounting the ${INSFILE}"
         fi
         cd ${FSMNT}.uzip

         # Copy over all the files now!
         tar cvf - . 2>/dev/null | tar -xpv -C ${FSMNT} ${TAROPTS} -f - 2>&1 | tee -a ${FSMNT}/.tar-extract.log
         if [ "$?" != "0" ]
         then
           cd /
           echo "TAR failure occured:" >>${LOGOUT}
           cat ${FSMNT}/.tar-extract.log | grep "tar:" >>${LOGOUT}
           umount ${FSMNT}.uzip
           mdconfig -d -u ${MDDEVICE}
           exit_err "ERROR: Failed extracting the tar image"
         fi

         # All finished, now lets umount and cleanup
         cd /
         umount ${FSMNT}.uzip
         mdconfig -d -u ${MDDEVICE}
         ;;
    tar) tar -xpv -C ${FSMNT} -f ${INSFILE} ${TAROPTS} >&1 2>&1
         if [ "$?" != "0" ]
         then
           exit_err "ERROR: Failed extracting the tar image"
         fi
         ;;
  esac

  # Check if this was a FTP download and clean it up now
  if [ "${INSTALLMEDIUM}" = "ftp" ]
  then
    echo_log "Cleaning up downloaded archive"
    rm ${INSFILE} 
    rm ${INSFILE}.count >/dev/null 2>/dev/null 
    rm ${INSFILE}.md5 >/dev/null 2>/dev/null
  fi

  echo_log "pc-sysinstall: Extraction Finished"

};

# Performs the extraction of data to disk from a directory with split files
start_extract_split()
{
  if [ -z "${INSDIR}" ]
  then
    exit_err "ERROR: Called extraction with no install directory set!"
  fi

  echo_log "pc-sysinstall: Starting Extraction"

  # Used by install.sh
  DESTDIR="${FSMNT}"
  export DESTDIR

  HERE=`pwd`
  DIRS=`ls -d ${INSDIR}/*|grep -Ev '(uzip|kernels|src)'`
  for dir in ${DIRS}
  do
	cd "${dir}"
	if [ -f "install.sh" ]
	then
	  echo "Extracting" `basename ${dir}`
      echo "y" | sh install.sh >/dev/null
      if [ "$?" != "0" ]
      then
        exit_err "ERROR: Failed extracting ${dir}"
      fi
    else
      exit_err "ERROR: ${dir}/install.sh does not exist"
    fi
  done
  cd "${HERE}"
  
  KERNELS=`ls -d ${INSDIR}/*|grep kernels`
  cd "${KERNELS}"
  if [ -f "install.sh" ]
  then
	echo "Extracting" `basename ${KERNELS}`
    echo "y" | sh install.sh generic >/dev/null
    if [ "$?" != "0" ]
    then
      exit_err "ERROR: Failed extracting ${KERNELS}"
    fi
	echo 'kernel="GENERIC"' > "${FSMNT}/boot/loader.conf"
  else
    exit_err "ERROR: ${KERNELS}/install.sh does not exist"
  fi
  cd "${HERE}"

  SOURCE=`ls -d ${INSDIR}/*|grep src`
  cd "${SOURCE}"
  if [ -f "install.sh" ]
  then
	echo "Extracting" `basename ${SOURCE}`
    echo "y" | sh install.sh all >/dev/null
    if [ "$?" != "0" ]
    then
      exit_err "ERROR: Failed extracting ${SOURCE}"
    fi
  else
    exit_err "ERROR: ${SOURCE}/install.sh does not exist"
  fi
  cd "${HERE}"

  echo_log "pc-sysinstall: Extraction Finished"
};

# Function which will attempt to fetch the install file before we start
# the install
fetch_install_file()
{
  get_value_from_cfg ftpPath
  if [ -z "$VAL" ]
  then
    exit_err "ERROR: Install medium was set to ftp, but no ftpPath was provided!" 
  fi

  FTPPATH="${VAL}"
  
  # Check if we have a /usr partition to save the download
  if [ -d "${FSMNT}/usr" ]
  then
    OUTFILE="${FSMNT}/usr/.fetch-${INSFILE}"
  else
    OUTFILE="${FSMNT}/.fetch-${INSFILE}"
  fi

  # Do the fetch of the archive now
  fetch_file "${FTPPATH}/${INSFILE}" "${OUTFILE}" "1"

  # Check to see if there is a .count file for this install
  fetch_file "${FTPPATH}/${INSFILE}.count" "${OUTFILE}.count" "0"

  # Check to see if there is a .md5 file for this install
  fetch_file "${FTPPATH}/${INSFILE}.md5" "${OUTFILE}.md5" "0"

  # Done fetching, now reset the INSFILE to our downloaded archived
  INSFILE="${OUTFILE}" ; export INSFILE

};

# Function which does the rsync download from the server specifed in cfg
start_rsync_copy()
{
  # Load our rsync config values
  get_value_from_cfg rsyncPath
  if [ -z "${VAL}" ]; then
    exit_err "ERROR: rsyncPath is unset! Please check your config and try again."
  fi
  RSYNCPATH="${VAL}" ; export RSYNCPATH

  get_value_from_cfg rsyncHost
  if [  -z "${VAL}" ]; then
    exit_err "ERROR: rsyncHost is unset! Please check your config and try again."
  fi
  RSYNCHOST="${VAL}" ; export RSYNCHOST

  get_value_from_cfg rsyncUser
  if [ -z "${VAL}" ]; then
    exit_err "ERROR: rsyncUser is unset! Please check your config and try again."
  fi
  RSYNCUSER="${VAL}" ; export RSYNCUSER

  get_value_from_cfg rsyncPort
  if [ -z "${VAL}" ]; then
    exit_err "ERROR: rsyncPort is unset! Please check your config and try again."
  fi
  RSYNCPORT="${VAL}" ; export RSYNCPORT

  COUNT="1"
  while
  z=1
  do
    if [ ${COUNT} -gt ${RSYNCTRIES} ]
    then
     exit_err "ERROR: Failed rsync command!"
     break
    fi

    rsync -avvzHsR \
    --rsync-path="rsync --fake-super" \
    -e "ssh -p ${RSYNCPORT}" \
    ${RSYNCUSER}@${RSYNCHOST}:${RSYNCPATH}/./ ${FSMNT}
    if [ "$?" != "0" ]
    then
      echo "Rsync failed! Tries: ${COUNT}"
    else
      break
    fi

    COUNT="`expr ${COUNT} + 1`"
  done 

};


# Entrance function, which starts the installation process
init_extraction()
{
  # Figure out what file we are using to install from via the config
  get_value_from_cfg installFile

  if [ ! -z "${VAL}" ]
  then
    INSFILE="${VAL}" ; export INSFILE
  else
    # If no installFile specified, try our defaults
    if [ "$INSTALLTYPE" = "FreeBSD" ]
    then
      case $PACKAGETYPE in
         uzip) INSFILE="${FBSD_UZIP_FILE}" ;;
          tar) INSFILE="${FBSD_TAR_FILE}" ;;
		  split)
			INSDIR="${FBSD_BRANCH_DIR}"

			# This is to trick opt_mount into not failing
			INSFILE="${INSDIR}"
			;;
      esac
    else
      case $PACKAGETYPE in
         uzip) INSFILE="${UZIP_FILE}" ;;
          tar) INSFILE="${TAR_FILE}" ;;
      esac
    fi
    export INSFILE
  fi

  # Lets start by figuring out what medium we are using
  case ${INSTALLMEDIUM} in
 dvd|usb) # Lets start by mounting the disk 
          opt_mount 
		  if [ ! -z "${INSDIR}" ]
		  then
          	INSDIR="${CDMNT}/${INSDIR}" ; export INSDIR
			start_extract_split

		  else
          	INSFILE="${CDMNT}/${INSFILE}" ; export INSFILE
          	start_extract_uzip_tar
		  fi
          ;;
     ftp) fetch_install_file
          start_extract_uzip_tar 
          ;;
     rsync) start_rsync_copy
            ;;
       *) exit_err "ERROR: Unknown install medium" ;;
  esac

};