Emacs: Trying to upgrade packages asynchronously

Table of Contents

As i started configuring emacs from scratch, I have chosen to use the default package manager (use-package)

When i tried to refresh & upgrade packages, I noticed that it blocks the emacs UI until the operation is finished.

I wanted to move this work to the background without blocking the UI. When browsing melpa, I found a package named async which provides a couple of functions to do write async code.

(defun async-upgrade-packages ()
  "Update packages to latest version without blocking Emacs."
  (interactive)
  (message "Upgrading packages in the background 🚀")
  (async-start (lambda ()
		 (package-refresh-contents)
		 (package-upgrade-all))
	       (lambda (result)(message result))))

The above code snippet does a decent job, But i have to learn how to handle errors in async way, As the (package-refresh-contents) throws an error if failed to fetch packages.

Thanks to the user (save-lisp-and-die) in the xmpp lisp room, who helped me with understanding the async package.