i____download_unpack_freebsd

# Finch - FreeBSD in a chroot! - dreamcat4@gmail.com (C 2014). FreeBSD License.
# 

# # How to manually download distfiles when RELEASE isn't out yet (e.g. "FreeBSD-10-RC5")
# sh
# mkdir "freebsd-distfiles-10-RC5" && cd "freebsd-distfiles-10-RC5"
# for distfile in "base.txz" "doc.txz" "kernel.txz" "lib32.txz" "src.txz"
# do
#   fetch "ftp://ftp.freebsd.org/pub/FreeBSD/releases/amd64/amd64/10.0-RC5/$distfile"
# done

fetch_distfiles ()
{
  local protocol="$1"

  cd "$finch_realpath/var/distfiles/finch"

  # fetch "ftp://ftp.freebsd.org/pub/FreeBSD/releases/$(uname -m)/$(uname -m)/$(uname -r | cut -d- -f1-2)/MANIFEST" || exit 1
  # fetch "ftp://ftp.freebsd.org/pub/FreeBSD/releases/${_arch}/${_arch}/${_maj_min_rel}/MANIFEST" || install_failed "couldn't fetch files from ftp.freebsd.org"
  fetch -T 30 "${protocol}://ftp.freebsd.org/${_ftp_dir}/MANIFEST" || return 1

  for distfile in $distfiles
  do
    # fetch "ftp://ftp.freebsd.org/pub/FreeBSD/releases/$(uname -m)/$(uname -m)/$(uname -r | cut -d- -f1-2)/$distfile"
    # fetch "ftp://ftp.freebsd.org/pub/FreeBSD/releases/${_arch}/${_arch}/${_maj_min_rel}/$distfile"
    fetch -T 30 -v "${protocol}://ftp.freebsd.org/${_ftp_dir}/$distfile" || return 1
  done
}

check_distfiles ()
{
  if [ -e "$finch_realpath/var/distfiles/finch/MANIFEST" ]; then
    if [ "$(command -v sha256)" ]; then
      cd "$finch_realpath/var/distfiles/finch"

      for distfile in $distfiles
      do
        if [ -e "$finch_realpath/var/distfiles/finch/$distfile" ]; then
          sha256_in_manifest="$(grep "$distfile" "$finch_realpath/var/distfiles/finch/MANIFEST" | cut -f 2)"
          sha256_downloaded="$(sha256 -q "$finch_realpath/var/distfiles/finch/$distfile")"

          if [ "$sha256_downloaded" != "$sha256_in_manifest" ]; then
            return 1
          fi
        fi
      done
    else
      echo "Can't check checksums. There is no command 'sha256' found on \$PATH=$PATH."
    fi
  else
    echo "No MANIFEST file, we have no sha256 checksums to check against."
  fi
}

retry_active_ftp ()
{
  echo "cleaning failed distfiles."
  rm -Rf   "$finch_realpath/var/distfiles/finch"
  mkdir -p "$finch_realpath/var/distfiles/finch"

  echo "http fetch failure. Trying ftp in active mode."
  export FTP_PASSIVE_MODE=NO
  fetch_distfiles "ftp" || ( unset FTP_PASSIVE_MODE; return 1 )
  unset FTP_PASSIVE_MODE
  check_distfiles  || return 1
}

retry_passive_ftp ()
{
  echo "cleaning failed distfiles."
  rm -Rf   "$finch_realpath/var/distfiles/finch"
  mkdir -p "$finch_realpath/var/distfiles/finch"

  echo "active ftp fetch failure. Trying ftp in passive mode."
  fetch_distfiles "ftp" || install_failed "couldn't fetch files from ftp.freebsd.org"
  check_distfiles || install_failed "bad checksum for distfile $distfile"
}

unpack_distfiles ()
{
  cd "$finch_realpath/var/distfiles/finch"

  for distfile in $distfiles
  do
    tar xf "$finch_realpath/var/distfiles/finch/$distfile" -C "$finch_realpath" || return 1
  done
}

download_unpack_freebsd ()
{
  # # Download the FreeBSD base image and distribution files.
  distfiles="base.txz kernel.txz src.txz"

  if [ "$(uname -m)" = "amd64" ]; then
    distfiles="$distfiles lib32.txz"
  fi

  if [ "$(ls "$finch_realpath/var/distfiles/finch/"*.txz 2> /dev/null)" ]; then
    check_distfiles;

    for txz_distfile in "$finch_realpath/var/distfiles/finch/"*.txz
    do
      # tar xf "$finch_realpath/var/distfiles/finch/$txz_distfile"   -C "$finch_realpath"
      tar xf "$txz_distfile" -C "$finch_realpath"
    done
    
  else
    mkdir -p "$finch_realpath/var/distfiles/finch/"
    cd "$finch_realpath/var/distfiles/finch"

    _arch="$(uname -m)"
    _maj_min_rel="$(uname -r | cut -d- -f1-2)"
    _rel="$(uname -r | cut -d- -f2)"

    # Write breadcrumb FreeBSD version
    # touch "$finch_realpath/var/distfiles/finch/FreeBSD-$(uname -m)-$(uname -r | cut -d- -f1-2)"
    touch "$finch_realpath/var/distfiles/finch/FreeBSD-${_arch}-${_maj_min_rel}"

    if [ "$_rel" = "RELEASE" ]; then
      _ftp_dir="pub/FreeBSD/releases/${_arch}/${_arch}/${_maj_min_rel}"
    fi

    if [ "$_rel" = "STABLE" ] || [ "$_rel" = "CURRENT" ]; then
      _ftp_dir="pub/FreeBSD/snapshots/${_arch}/${_arch}/${_maj_min_rel}"
    fi

    fetch_distfiles "http" && check_distfiles || retry_active_ftp || retry_passive_ftp;
    unpack_distfiles || install_failed "couldn't unpack distfiles from ftp.freebsd.org"
  fi
}