### variables ##################################################################

RELEASE_ARCHIVE=${RELEASE_ARCHIVE:-$(basename "$DIR_VERSION")_$(uname -m).tar.xz}

RELEASE_ARCHIVE=${RELEASE_ARCHIVE:-$(\

  basename "$DIR_VERSION")_$(uname -m).tar.xz}

# The canonical source for releases is GitLab.

RELEASE_URL="https://gitlab.com/api/v4/projects/35965804/packages/generic/jhb/\

### functions ##################################################################

function release_archive_get_name

{

  case "$RELEASE_ARCHIVE" in

    *.tar.xz)

      basename -s .tar.xz "$RELEASE_ARCHIVE"

      ;;

    *.dmg)

      basename -s .dmg "$RELEASE_ARCHIVE"

      ;;

    *)

      echo_e "unsupported RELEASE_ARCHIVE file type"

      echo "$RELEASE_ARCHIVE"

      ;;

  esac

}

# Nothing here.

### main #######################################################################

### variables ##################################################################

SHADOW_FILE_DIR=${SHADOW_FILE_DIR:-${CI_PROJECT_DIR:-$DIR_WORK}}

ARCHIVE_DMG=${ARCHIVE_DMG:-$DIR_ARTIFACT/$(\

  basename -s .tar.xz "$RELEASE_ARCHIVE").dmg}

### functions ##################################################################

# shellcheck disable=SC2120 # optional arguments

function create_tar

{

  local suffix=$1 # optional

  local file

  file=$DIR_ARTIFACT/$(release_archive_get_name)$suffix.tar.xz

  file=$DIR_ARTIFACT/$RELEASE_ARCHIVE

  echo_i "creating $file"

  echo "$file"

}

# shellcheck disable=SC2120 # optional arguments

function create_dmg

{

  local file

  file=$DIR_ARTIFACT/$(release_archive_get_name).dmg

  ( # create dmg

    local vol_name

    vol_name=$(basename "$DIR_VERSION")

      -size 16g \

      -srcfolder "$vol_name" \

      -volname "$vol_name" \

      "$file" \

      "$ARCHIVE_DMG" \

      >/dev/null

  )

  ( # create and print checksum

    cd "$(dirname "$file")" || exit 1

    shasum -a 256 "$(basename "$file")" >"$file".sha256

    echo_i "sha256 = $(awk '{ print $1 }' "$file".sha256)"

    cd "$(dirname "$ARCHIVE_DMG")" || exit 1

    shasum -a 256 "$(basename "$ARCHIVE_DMG")" >"$ARCHIVE_DMG".sha256

    echo_i "sha256 = $(awk '{ print $1 }' "$ARCHIVE_DMG".sha256)"

  )

  echo "$file"

  echo "$ARCHIVE_DMG"

}

function mount_dmg

{

  local dmg

  dmg=$DIR_WORK/$(release_archive_get_name).dmg

  local shadow_file

  shadow_file=$SHADOW_FILE_DIR/$(basename "$dmg").shadow

  local shadow_file=$ARCHIVE_DMG.shadow

  if [ ! -d "$DIR_VERSION" ]; then

    mkdir -p "$DIR_VERSION"

    bzip2 -d "$shadow_file".bz2

  fi

  echo_i "mounting $(basename "$dmg")"

  hdiutil mount "$dmg" \

  echo_i "mounting $(basename "$ARCHIVE_DMG")"

  hdiutil mount "$ARCHIVE_DMG" \

    -mountPoint "$DIR_VERSION" \

    -shadow "$shadow_file"

}

{

  local keep_shadow_file=$1

  local dmg

  dmg=$DIR_WORK/$(release_archive_get_name).dmg

  local shadow_file

  shadow_file=$SHADOW_FILE_DIR/$(basename "$dmg").shadow

  local shadow_file=$ARCHIVE_DMG.shadow

  if [ -f "$dmg" ]; then

  if [ -f "$ARCHIVE_DMG" ]; then

    local partition_uuid

    partition_uuid=$(hdiutil imageinfo "$dmg" |

    partition_uuid=$(hdiutil imageinfo "$ARCHIVE_DMG" |

        grep -A1 "partition-name: disk image" |

        grep UUID |

        awk '{ print $2 }')

  fi

}

function download_dmg

{

  local partial_download=$DIR_WORK/${FUNCNAME[0]} # DIR_TMP not available yet

  # download (at least) 100 kb of data

  curl -L "$RELEASE_URL" 2>/dev/null | head -c 100000 >"$partial_download"

  # if we got 100 kb, it's not a "404 file not found"

  if [ "$(stat -f%z "$partial_download")" -eq 100000 ]; then

    echo_i "downloading $RELEASE_URL"

    curl -o "$DIR_WORK/$RELEASE_ARCHIVE" -L -C - "$RELEASE_URL"

  fi

  rm "$partial_download"

}

function install_dmg

{

  local dmg

  dmg=$DIR_WORK/$(release_archive_get_name).dmg

  # download and mount read-only disk image

  if [ -f "$dmg" ]; then

    echo_i "using $dmg"

  else

    download_dmg

  fi

  mount_dmg

}

function uninstall_dmg

{

  local keep_shadow_file=$1   # optional

  unmount_dmg "$keep_shadow_file"

}

function remove_nonessential_files

{

  local additional_dirs=$1  # optional

      create_dmg

      ;;

    create_tar)

      create_tar "$option" # option: add suffix to archive, default is none

      create_tar

      ;;

    install_dmg)

      install_dmg

    mount_dmg)

      mount_dmg

      ;;

    uninstall_dmg)

      uninstall_dmg "$option"

    unmount_dmg)

      unmount_dmg "$option" # option: keep shadow file or not

      ;;

    remove_nonessentials)

      remove_nonessential_files "$option" # option: additional dirs to clean up

      ;;

    *)

      echo_e "usage: $0 {create_dmg|create_tar|install_dmg|uninstall_dmg|\

      echo_e "usage: $0 {create_dmg|create_tar|mount_dmg|unmount_dmg|\

remove_nonessentials}"

      ;;

  esac