Do not use org-clock-goto to get tags

It missed the .el extension, which is required if you want to install it via Quelpa (and probably
with `package.el` later.

README.md

@@ -10,6 +10,27 @@ You can set the file to be written by customizing `org-clock-waybar-filename`; i
 `$XDG_CACHE_HOME/waybar-current-task.json` (`$XDG_CACHE_HOME` defaults to `$HOME/.cache` on XDG
 compatible systems, like Linux.)
 
+### Quelpa
+
+If you only have [`quelpa`](https://github.com/quelpa/quelpa) installed:
+
+```elisp
+(quelpa
+ '(org-clock-waybar
+   :fetcher git
+   :url "https://gitea.polonkai.eu/gergely/org-clock-waybar.git"))
+```
+
+or, if you have [`quelpa-use-package`](https://github.com/quelpa/quelpa-use-package) installed,
+too:
+
+```elisp
+(quelpa-use-package org-clock-waybar
+  :quelpa (org-clock-waybar
+           :fetcher git
+           :url "https://gitea.polonkai.eu/gergely/org-clock-waybar.git"))
+```
+
 ## Waybar configuration
 
 To add the current task to Waybar, add this snippet to your config:

org-clock-waybar.el

@@ -1,4 +1,4 @@
-;;; org-clock-waybar --- Summary
+;;; org-clock-waybar.el --- Summary
 
 ;; Copyright (C) 2021 Gergely Polonkai
 
@@ -84,9 +84,9 @@
 (defun org-clock-waybar--get-tags ()
   "Get the tags of the currently clocked-in task."
   (when (org-clocking-p)
-    (save-window-excursion
-      (org-clock-goto)
-      (org-get-tags))))
+    (or (org-with-point-at org-clock-marker (org-get-tags))
+        "")
+    ))
 
 (defun org-clock-waybar--get-clocked-task-json ()
   "Get the currently clocked-in task’s data as a stringified JSON object.
@@ -129,6 +129,7 @@ emacsclient --eval '(org-clock-waybar-output-task)'"
 
 It adds `org-clock-waybar-save-task' to both `org-clock-in-hook' and
 `org-clock-out-hook'."
+  (add-hook 'org-clock-cancel-hook #'org-clock-waybar-save-task)
   (add-hook 'org-clock-in-hook #'org-clock-waybar-save-task)
   (add-hook 'org-clock-out-hook #'org-clock-waybar-save-task)
   (add-hook 'kill-emacs-hook #'org-clock-waybar-save-task))