#!/bin/sh -e

unset TMP TEMP TMPDIR || true

if [ "$DEBOOTSTRAP_DIR" = "" ]; then
    DEBOOTSTRAP_DIR=/lib/debootstrap
fi

if [ -x "/usr/bin/gettext" ]; then
    USE_GETTEXT_INTERACTION=yes
fi

DEVICES_TARGZ=$DEBOOTSTRAP_DIR/devices.tar.gz

. $DEBOOTSTRAP_DIR/functions

GETTEXT_LANG=$LANG
LANG=C
USE_COMPONENTS=main
VARIANT=""

export LANG USE_COMPONENTS
umask 022

usage_err()
{
  info USAGE1 "usage: [OPTION]... <suite> <target> [<mirror> [<script>]]"
  info USAGE2 "Try \`${0##*/} --help' for more information."
  error "$@"
}

usage()
{
    echo "Usage: ${0##*/} [OPTION]... <suite> <target> [<mirror> [<script>]]"
    echo "Bootstrap Debian base system."
    echo
    cat <<EOF
      --arch                 set the target architecture (use if no dpkg)
                               [ --arch powerpc ]
      --download-only        download packages, but don't perform installation
      --print-debs           print the packages to be installed, and exit
      --unpack-tarball       acquire .debs from a tarball instead of http
      --boot-floppies        used for internal purposes by boot-floppies
      --debian-installer     used for internal purposes by debian-installer
      --help                 display this help and exit
      --include=A,B,C        adds specified names to the list of base packages
      --exclude=A,B,C        removes specified packages from the list
      --verbose              don't turn off the output of wget
      --components=A,B,C     use packages from the listed components of the 
                             archive
      --variant=X            use variant X of the bootstrap scripts
                             (currently supported variants: buildd)
EOF
}

if [ $# != 0 ] ; then
  while true ; do
    case "$1" in
	--help)
	  usage
	  exit 0
	  ;;
	--boot-floppies)
	  if [ -n "$USE_DEBIANINSTALLER_INTERACTION" ] ; then
	    error 1 ARG_BFDI "Can only use one of --boot-floppies and --debian-installer"
	  fi
	  if ! (echo -n "" >&3) 2>/dev/null; then
	    error 1 ARG_BFBYHAND "If running debootstrap by hand, don't use --boot-floppies"
	  fi
	  USE_BOOTFLOPPIES_INTERACTION=yes
	  shift
	  ;;
        --debian-installer)
	  if [ -n "$USE_BOOTFLOPPIES_INTERACTION" ] ; then
	    error 1 ARG_BFDI "Can only use one of --boot-floppies and --debian-installer"
	  fi
	  if ! (echo -n "" >&3) 2>/dev/null; then
	    error 1 ARG_DIBYHAND "If running debootstrap by hand, don't use --debian-installer"
	  fi
	  USE_DEBIANINSTALLER_INTERACTION=yes
	  shift
	  ;;
	--print-debs)
	  JUST_PRINT_DEBS=yes
	  shift
	  ;;
	--download-only)
	  DOWNLOAD_ONLY=yes
	  shift
	  ;;
	--arch)
	  if [ -n "$2" ] ; then
	    ARCH="$2"
	    shift 2
	  else
	    error 1 NEEDARG "option requires an argument %s" "$1"
	  fi
	  ;;
	--unpack-tarball)
	  if [ -n "$2" ] ; then
	    if [ ! -f "$2" ] ; then
	      error 1 NOTARBALL "%s: No such file or directory" "$2"
	    fi
	    UNPACK_TARBALL="$2"
	    shift 2
	  else
	    error 1 NEEDARG "option requires an argument %s" "$1"
	  fi
	  ;;
  --include*)
    additional="$(echo $1 | cut -f2 -d"="|tr , " ")"
    shift 1
    ;;
  --exclude*)
    exclude="$(echo $1 | cut -f2 -d"="|tr , " ")"
    shift 1
    ;;
  --verbose)
    verbose=true
    export verbose
    shift 1
    ;;
  --components*)
    USE_COMPONENTS="$(echo "$1" | cut -f2 -d"="|tr , "|")"
    export USE_COMPONENTS
    shift 1
    ;;
  --variant*)
    VARIANT="$(echo "$1" | cut -f2 -d"=")"
    shift 1
    ;;
	*)
	  break
	  ;;
    esac
  done
else
  usage_err 1 NEEDSUITETARGET "You must specify a suite and a target."
fi

if [ "$1" = "" ] || ( [ "$2" = "" ] && [ "$JUST_PRINT_DEBS" = "" ] ); then
  usage_err 1 NEEDSUITETARGET "You must specify a suite and a target."
fi

SUITE="$1"
TARGET="$2"
if [ "${TARGET#/}" = "${TARGET}" ]; then
  if [ "${TARGET%/*}" = "$TARGET" ] ; then
    TARGET="$(echo `pwd`/$TARGET)"
  else
    TARGET="$(cd ${TARGET%/*}; echo `pwd`/${TARGET##*/})"
  fi
fi

MIRRORS="http://ftp.debian.org/debian"
SCRIPT="$DEBOOTSTRAP_DIR/scripts/$1"
if [ -n "$VARIANT" ]; then
    SCRIPT="${SCRIPT}.${VARIANT}"
fi
if [ "$3" != "" ]; then
  MIRRORS="$3"
  if [ "$4" != "" ]; then
    SCRIPT="$4"
  fi
fi

# Remove trailing /'s
TARGET="${TARGET%/}"
MIRRORS="${MIRRORS%/}"

if [ "$ARCH" != "" ]; then
	true
elif [ -x /usr/bin/dpkg ] && /usr/bin/dpkg --print-installation-architecture >/dev/null 2>&1
then
	ARCH=`/usr/bin/dpkg --print-installation-architecture`
elif [ -e $DEBOOTSTRAP_DIR/arch ]; then
	ARCH=`cat $DEBOOTSTRAP_DIR/arch`
else
	error 1 WHATARCH "Couldn't work out current architecture"
fi

export MIRRORS ARCH SUITE TARGET

if [ "$JUST_PRINT_DEBS" = "" ] && [ "$DOWNLOAD_ONLY" = "" ] && [ -x /usr/bin/id ] && [ `id -u` -ne 0 ]; then
  error 1 NEEDROOT "debootstrap can only run as root"
fi

if [ ! -e "$SCRIPT" ]; then
  error 1 NOSCRIPT "No such script: %s" "$SCRIPT"
fi

mkdir -p "$TARGET"

PKGDETAILS=$DEBOOTSTRAP_DIR/pkgdetails

if [ "$UNPACK_TARBALL" ]; then
  if [ "${UNPACK_TARBALL#/}" = "$UNPACK_TARBALL" ]; then
    error 1 TARPATH "Tarball must be given a complete path"
  fi
  if [ "${UNPACK_TARBALL%.tar}" != "$UNPACK_TARBALL" ]; then
    (cd "$TARGET" && tar -xf "$UNPACK_TARBALL")
  elif [ "${UNPACK_TARBALL%.tgz}" != "$UNPACK_TARBALL" ]; then
    (cd "$TARGET" && zcat "$UNPACK_TARBALL" | tar -xf -)
  else
    error 1 NOTTAR "Unknown tarball: must be either .tar or .tgz"
  fi
fi

. "$SCRIPT"

work_out_debs

if [ "$JUST_PRINT_DEBS" ]; then
  echo "$all_debs"
  exit 0
fi

download $all_debs

if [ "$DOWNLOAD_ONLY" ]; then
  exit 0
fi

install_debs

if [ -e "$TARGET/etc/apt/sources.list" ]; then
  rm -f "$TARGET/etc/apt/sources.list"
fi

sync

if [ -n "$USE_BOOTFLOPPIES_INTERACTION" ] ; then
  echo "I: debootstrap: Successfully completed" # goes to /dev/tty4
  sleep 1 || true # give the user a second to see the success notice.
fi