MacOS launch helper to start emacs daemon or attach to one

em.scpt

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--
-- Open this script with 'Script Editor' on MacOS, then save it
-- inside /Applications as an 'Application', not 'Script'.
--
-- Prerequisites:
--
-- 1. There should be Emacs in your /Applications
--    If you downloaded emacs-plus from homebrew:
--    ln -s /usr/local/Cellar/emacs-plus@27/27.2/Emacs.app /Applications/Emacs.app
--
-- 2. Make sure you have a /usr/local/bin/emacsclient
--    If you don't, update the script below to the correct path
--
-- Akash Agrawal <[email protected]>

tell application "Finder"
	try
		log "checking for existing emacs client frames"
		set frameVisible to do shell script "/usr/local/bin/emacsclient -n -e '(> (length (frame-list)) 1)'"
		if frameVisible is not "t" then
			log "server exists, attaching a new client frame"
			do shell script "/usr/local/bin/emacsclient -c -n"
		else
			log frameVisible
			log "server and window exists, bringing it to foreground"
		end if
	on error
		log "starting server"
		do shell script "/usr/local/bin/emacs --daemon"
		do shell script "/usr/local/bin/emacsclient -c -n"
	end try
	tell application "Emacs" to activate
end tell

em.sh

# Complimentary shell helper to add an 'em' command if you're opening files from terminal.
# It will try to connect to a running emacs daemon. If not found, it starts one.
#
# Source this file from your ~/.zlogin, ~/.zshrc, ~/.bashrc etc,
# or add this code directly to those files.
#
# Example Usage:
# > em ~/.zshrc
#
# Akash Agrawal <[email protected]>

em () {
    # Check if a frame(window) already exists
    emacsclient -n -e "(if (> (length (frame-list)) 1) 't)" | grep -q t

    # If it doesn't create a new window (start server if not running)
    # Else, use the same window to open the file.
    if [ "$?" = "1" ]; then
        emacsclient -c -n -a "" "$@"
    else
        emacsclient -n -a "" "$@"
    fi
}

Thanks, I think I get the idea :)