useful-scripts/bin/nextcloud-appimage-launch

#!/bin/sh

INSTALL_DIR="/home/jmm/opt/apps/nextcloud-client"

# name:     nextcloud-appimage-launch
# summary:  Downloads and launches the latest Nextcloud (desktop) AppImage
# params:   none

THISDIR="$(dirname "$(readlink -f "${0}")")"
# shellcheck disable=SC1091
. "${THISDIR}/.inc/common"

needs_commands "curl" "notify-send"

version_available="$( \
    curl --silent --verbose --retry-all-errors --retry-delay 3 --retry 5 \
      'https://github.com/nextcloud-releases/desktop/releases/latest' 2>&1 \
    | grep '^< location: ' \
    | grep -Eo '[[:digit:]]+\.[[:digit:]]+\.[[:digit:]]+' \
    | head -n1 \
)"

if [ -z "${version_available}" ]; then
    echo "failed checking for nextcloud update" >&2
    exit 1
fi

version_installed="$( \
    readlink "${INSTALL_DIR}/current" \
    | grep -Eo '[[:digit:]]+\.[[:digit:]]+\.[[:digit:]]+' \
)"

if [ "${version_available}" != "${version_installed}" ]; then
    echo "new nextcloud version available: ${version_available}" >&2
    notify-send \
      --app-name "nextcloud-appimage-launch" \
      --icon "${THISDIR}/.icon/nextcloud.svg" \
      "Nextcloud" \
      "Installing new Nextcloud version: ${version_available}"

    if download_gui \
      "https://github.com/nextcloud-releases/desktop/releases/download/v${version_available}/Nextcloud-${version_available}-x86_64.AppImage" \
      "${INSTALL_DIR}/Nextcloud-${version_available}-x86_64.AppImage" \
      ""; then # no sha256
        chmod +x "${INSTALL_DIR}/Nextcloud-${version_available}-x86_64.AppImage"
        ln -sf "./Nextcloud-${version_available}-x86_64.AppImage" "${INSTALL_DIR}/current"
    fi
fi

exec "${INSTALL_DIR}/current" --background "${@}"