✨ nextcloud: script style and retrying

bin/.inc/common

@@ -0,0 +1,18 @@
+#!/bin/sh
+
+# check if a command is available
+has_command() { # $command
+    command -v "${1}" 1>/dev/null 2>/dev/null
+}
+
+needs_commands() { # $status $cmd1 $cmd2 ...
+    _nc_status="${1}"
+    shift 1
+
+    for _nc_cmd in "${@}"; do
+        if ! has_command "${_nc_cmd}"; then
+            echo "Command '${_nc_cmd}' not available!" >&2
+            exit "${_nc_status}"
+        fi
+    done
+}

bin/nextcloud-appimage-launch

@@ -0,0 +1,52 @@
+#!/bin/sh
+
+INSTALL_DIR="/path/to/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 "nextcloud is up to date!" >&2
+    exit 0
+fi
+
+echo "new nextcloud version available: ${version_available}" >&2
+notify-send \
+    --app-name "Nextcloud" \
+    --icon "${THISDIR}/.icon/nextcloud.svg" \
+    "nextcloud-appimage-launch" \
+    "new nextcloud version available: ${version_available}"
+
+curl --silent --show-error --fail --location \
+    "https://github.com/nextcloud-releases/desktop/releases/download/v${version_available}/Nextcloud-${version_available}-x86_64.AppImage" \
+    --output "${INSTALL_DIR}/Nextcloud-${version_available}-x86_64.AppImage"
+
+chmod +x "${INSTALL_DIR}/Nextcloud-${version_available}-x86_64.AppImage"
+ln -sf "./Nextcloud-${version_available}-x86_64.AppImage" "${INSTALL_DIR}/current"
+
+exec "${INSTALL_DIR}/current" --background "${@}"

bin/system-update

@@ -6,10 +6,9 @@
 #           - fully POSIX shell compliant
 # params:   none
 
-# check if a command is available
-has_command() { # $command
-    command -v "$1" 1>/dev/null 2>/dev/null
-}
+THISDIR="$(dirname "$(readlink -f "${0}")")"
+# shellcheck disable=SC1091
+. "${THISDIR}/.inc/common"
 
 # run self as root
 if [ "$(id -u)" -ne 0 ]; then