nextcloud-update.sh

gistfile1.txt

#!/usr/bin/env bash
# Update (or install) the latest NextCloud AppImage
# Optimized for Debian/Ubuntu + GNOME
# ffflorian 2021

set -e
SCRIPT_NAME="${0##*/}"

INSTALL_DIR="/opt/nextcloud"
APPIMAGE_FILE="nextcloud.AppImage"
EXEC_FILE="${INSTALL_DIR}/${APPIMAGE_FILE}"
TEMP_DIR="$(mktemp -d)"
TEMP_APPIMAGE="${TEMP_DIR}/${APPIMAGE_FILE}"
TEMP_SIGNATURE="${TEMP_SIGNATURE}.asc"
ICON_FILE="${INSTALL_DIR}/nextcloud.png"
DESKTOP_FILE="/usr/share/applications/nextcloud.desktop"
RELEASE_URL="https://api.github.com/repos/nextcloud/desktop/releases/latest"
USE_CURL="yes"
FORCE="no"

_cleanup() {
  rm -rf "${TEMP_DIR}"
}

trap _cleanup EXIT

_compare_version() {
  printf "%03d%03d%03d%03d" $(echo "${1}" | tr '.' ' ')
}

get_latest_release() {
  if [ "${USE_CURL}" = "yes" ]; then
    curl -sL "${RELEASE_URL}" | grep '"tag_name":' | sed -E 's/.*"v?([^"]+)".*/\1/'
  else
    wget -qO- "${RELEASE_URL}" | grep '"tag_name":' | sed -E 's/.*"v?([^"]+)".*/\1/'
  fi
}

_print_usage() {
cat <<EOF
Usage: ${SCRIPT_NAME} [option]

Options:
 --force (-f)       Reinstall NextCloud if it is already installed.

Commands:
 --help (-h)        Display this help message
EOF
}

while :
do
  case "${1}" in
    -f|--force )
        FORCE="force"
        shift
        ;;
    -h|--help )
        _print_usage
        exit 0
        ;;
    * )
        break
        ;;
  esac
done

if [ -d "${INSTALL_DIR}" ]; then
  if [ -r "${EXEC_FILE}" ]; then
    CURRENT_VERSION="$(${EXEC_FILE} --version | sed -n 's/Nextcloud version \(.*\)git.*/\1/p')"
  else
    read -r -p "The current NextCloud installation seems to be broken. Would you like to reinstall the latest version? [y/N] " RESPONSE

    case "${RESPONSE}" in
      [nN][oO]|[nN]|"" ) exit 0 ;;
    esac
    FORCE="force"
  fi
else
  read -r -p "NextCloud is not installed yet. Would you like to install it? [y/N] " RESPONSE

  case "${RESPONSE}" in
    [nN][oO]|[nN]|"" ) exit 0 ;;
  esac
  FORCE="force"
fi

if ! command -v "curl" > /dev/null; then
  USE_CURL="no"
fi

LATEST_VERSION="$(get_latest_release)"

if [ "${FORCE}" != "force" ]; then
  if [ "$(_compare_version "${LATEST_VERSION}")" -le "$(_compare_version "${CURRENT_VERSION}")" ]; then
    echo "No update needed, ${CURRENT_VERSION} is the latest NextCloud version available."
    echo "Run this script with --force to reinstall this NextCloud version."
    exit 0
  else
    echo "A new version ${LATEST_VERSION} is available."
  fi
fi

DOWNLOAD_URL="https://github.com/nextcloud/desktop/releases/download/v${LATEST_VERSION}/Nextcloud-${LATEST_VERSION}-x86_64.AppImage"
SIGNATURE_URL="${DOWNLOAD_URL}.asc"

echo "Downloading NextCloud ${LATEST_VERSION} from ${DOWNLOAD_URL} ... "

if [ "${USE_CURL}" = "yes" ]; then
  curl -o "${TEMP_APPIMAGE}" -L "${DOWNLOAD_URL}"
else
  wget -O "${TEMP_APPIMAGE}" "${DOWNLOAD_URL}"
fi

echo "Downloading PGP signature from ${SIGNATURE_URL} ... "

if [ "${USE_CURL}" = "yes" ]; then
  curl -o "${TEMP_SIGNATURE}" -L "${SIGNATURE_URL}"
else
  wget -O "${TEMP_SIGNATURE}" "${SIGNATURE_URL}"
fi

echo "Verifying AppImage with GPG ..."
gpg --verify "${TEMP_SIGNATURE}" "${TEMP_APPIMAGE}"

printf "OK\\n\\n"

if [ ! -r "${TEMP_APPIMAGE}" ]; then
  echo "Error: could not find downloaded file \"${TEMP_APPIMAGE}\"".
  exit 1
fi

echo "Copying AppImage ... "
sudo mv "${TEMP_APPIMAGE}" "${INSTALL_DIR}/${APPIMAGE_FILE}"
sudo chmod +x "${INSTALL_DIR}/${APPIMAGE_FILE}"
sudo chown root:root "${INSTALL_DIR}/${APPIMAGE_FILE}"
printf "OK\\n\\n"

printf "Creating soft link at /usr/bin ... "
sudo ln -fs "${EXEC_FILE}" "/usr/bin/"

printf "OK\\n\\n"

printf "Setting start menu entry ... "

sudo tee "${DESKTOP_FILE}" > /dev/null <<EOF
[Desktop Entry]
Categories=Utility;X-SuSE-SyncUtility;
Type=Application
Exec=${EXEC_FILE}
Name=Nextcloud desktop sync client
Comment=Nextcloud desktop synchronization client
GenericName=Folder Sync
Icon=${ICON_FILE}
Keywords=Nextcloud;syncing;file;sharing;
X-GNOME-Autostart-Delay=3
EOF

echo "All done!"