clocking.lua

local clockingLog = hs.logger.new("clocking")
local clockingMenu = hs.menubar.new()
local currentTask = nil

local function trim(s)
   return (s:gsub("^%s*(.-)%s*$", "%1"))
end

local function eval(sexp, callback)
   hs.task.new(
      "/usr/local/bin/emacsclient",
      function(exitCode, stdOut, stdErr)
         if exitCode == 0 then
            callback(trim(stdOut))
         end
      end,
      { "--eval", sexp }
   ):start()
end
      

local function updateClockingMenu()
   eval(
      "(org-clock-is-active)",
      function(value)
         if value == "nil" then
            clockingMenu:setTitle("No Task")
         else
            eval(
                "(org-clock-get-clock-string)",
                function(value)
                   clockingMenu:setTitle(string.match(value, '"(.+)"'))
                end
            )
         end
      end
   )
end

local function startUpdatingClockingMenu()
   hs.timer.doEvery(10, updateClockingMenu)
end

local mod = {}

function mod.init()
    updateClockingMenu()
    startUpdatingClockingMenu()
end

return mod

I just added return to the lines 41 and 48:

41c41
<    hs.timer.doEvery(5, updateClockingMenu)
---
>    return hs.timer.doEvery(5, updateClockingMenu)
48c48
<     startUpdatingClockingMenu()
---
>     return startUpdatingClockingMenu()

And binded the timer into a global variable in my init.lua:

local clocking = require "clocking"
dateTimeGarbageCollectorPreventer = clocking.init()

Now it works without any problems. Here is the issue that I found the solution: Hammerspoon/hammerspoon#1942 TLDR; timer gets garbage collected for some reason, when we bind it to a some global value, it doesn't get garbage collected.

I made it work for me.

It will track org-clock-in and org-clock-out with a menu title. Also, you will to install a Hammerspoon CLI. In hammerspoon console do:

require("hs.ipc")
hs.ipc.cliInstall()

Check in console with which hs

Here are emacs doom and hammerspoon code below:

;;; Hammerspoon status hooks for org-clock

(defun my/hs-org-clock-status ()
  "Return 'HH:MM Title' if clocking, else empty string (no text properties)."
  (require 'org)
  (require 'org-clock)
  (if (org-clocking-p)
      (let* ((mins (org-clock-get-clocked-time))
             (h (/ mins 60))
             (m (% mins 60))
             ;; org-clock-current-task is often PROPERTIZED → strip it:
             (raw (or org-clock-current-task
                      (ignore-errors (org-get-heading t t t t))
                      ""))  ;; fallback if no heading
             (title (string-trim
                     (replace-regexp-in-string
                      "[\n\r]+" " "
                      (substring-no-properties raw)))))
        (format "%02d:%02d %s" h m title))
    ""))

(defun my/hs-org-clock-out ()
  "Clock out if clocking. Returns a simple status string."
  (require 'org-clock)
  (if (org-clocking-p)
      (progn
        (org-clock-out nil t)
        "clocked-out")
    "no-clock"))

(defun my/hs-org-clock-out ()
  "Clock out if clocking. Returns a small status string."
  (require 'org-clock)
  (if (org-clocking-p)
      (progn (org-clock-out nil t) "clocked-out")
    "no-clock"))

(defun my/hs-org-clock-goto ()
  "Jump to the currently clocked task. Returns status."
  (require 'org-clock)
  (if (org-clocking-p)
      (progn
        (org-clock-goto)
        ;; bring Emacs to front when in GUI
        (when (display-graphic-p)
          (ignore-errors (raise-frame))
          (ignore-errors (select-frame-set-input-focus (selected-frame))))
        "goto")
    "no-clock"))

(defun my/hs--cli (expr)
  (let* ((hs (or (executable-find "hs")
                 "/opt/homebrew/bin/hs"
                 "/usr/local/bin/hs")))
    (when (and hs (file-executable-p hs))
      ;; non-blocking; no window
      (start-process "hs-ping" nil hs "-c" expr))))

(defun my/hs-on-clock-change (&rest _)
  (require 'org-clock)
  (my/hs--cli (format "OrgClockMenubar_push('%s')"
                      (if (org-clocking-p) "in" "out"))))

(add-hook 'org-clock-in-hook     #'my/hs-on-clock-change)
(add-hook 'org-clock-out-hook    #'my/hs-on-clock-change)
(add-hook 'org-clock-cancel-hook #'my/hs-on-clock-change)

Here is lua code

local log = hs.logger.new("orgclock", "info")
local menu = hs.menubar.new()
local emacsTask = nil
local lastActive = false
local emacsclientPath = nil
local triedLaunch = false

_G.OrgClockMenubar = _G.OrgClockMenubar or {}
menu:setTitle("⏱")

-- small utils
local function trim(s)
	return (s or ""):gsub("^%s*(.-)%s*$", "%1")
end
local function unquote(s)
	return s and (s:gsub('^"(.*)"$', "%1")) or s
end
local function exists(p)
	return p and hs.fs.attributes(p) ~= nil
end

local function truncate(s, max)
	if #s <= max then
		return s
	end
	return s:sub(1, max - 1) .. "…"
end

-- UTF-8 helpers (Lua 5.3+ has the utf8 lib; Hammerspoon includes it)
local function utf8safeLen(s)
	local len = utf8.len(s)
	if len then
		return len
	end -- already valid UTF-8
	-- sanitize invalid byte sequences so we never crash later
	return utf8.len(s or "") or #(s or "")
end

local function utf8sub(s, maxChars)
	-- return first maxChars UTF-8 codepoints of s
	if maxChars <= 0 then
		return ""
	end
	local i = utf8.offset(s, maxChars + 1)
	if i then
		return s:sub(1, i - 1)
	end
	-- i is nil when maxChars >= length; return whole string
	return s
end

-- Truncate by characters, never break a multibyte codepoint
local function truncateUtf8(s, maxChars)
	s = s or ""
	if utf8safeLen(s) <= maxChars then
		return s
	end
	return utf8sub(s, maxChars) .. "…"
end

-- Optional: prefer cutting on a word boundary if one exists near the end
local function truncateUtf8WordBoundary(s, maxChars)
	s = s or ""
	if utf8safeLen(s) <= maxChars then
		return s
	end
	local head = utf8sub(s, maxChars) -- safe head
	-- try to backtrack to last separator to avoid chopping words
	-- separators: space, tab, dash, slash, underscore, dot, comma, colon, semicolon
	local lastSep = head:find("[ \t%-%./_,;:][^ \t%-%./_,;:]*$") -- index of last sep chunk
	if lastSep and lastSep > math.floor(maxChars * 0.6) then
		head = head:sub(1, lastSep) -- keep up to/including the sep
	end
	head = head:gsub("%s+$", "") -- strip trailing whitespace
	return head .. "…"
end

-- Find emacsclient in several common places
local function findEmacsclient()
	local candidates = {
		"/opt/homebrew/bin/emacsclient", -- Apple Silicon Homebrew
		"/usr/local/bin/emacsclient", -- Intel Homebrew
		"/Applications/Emacs.app/Contents/MacOS/bin/emacsclient", -- Emacs.app
	}
	for _, p in ipairs(candidates) do
		if exists(p) then
			return p
		end
	end
	-- last resort: ask the shell
	local out = hs.execute("/usr/bin/env which emacsclient")
	out = trim(out or "")
	if out ~= "" and exists(out) then
		return out
	end
	return nil
end

emacsclientPath = findEmacsclient()
if not emacsclientPath then
	log.e("Could not find emacsclient in PATH or known locations.")
end

-- generic eval wrapper with single-flight protection
local function eval(sexp, callback)
	if not emacsclientPath then
		return
	end
	if emacsTask and emacsTask:isRunning() then
		log.i("Skip emacsclient: previous call still running")
		return
	end

	emacsTask = hs.task.new(emacsclientPath, function(exitCode, stdout, stderr)
		emacsTask = nil
		stdout, stderr = stdout or "", stderr or ""

		if exitCode == 0 then
			local value = trim(stdout)
			callback(value)
		else
			-- Common failure: server not running
			if stderr:lower():find("server") or stderr:lower():find("socket") then
				log.w("emacsclient: server not running. stderr: " .. stderr)
				if not triedLaunch then
					triedLaunch = true
					hs.execute("open -g -a Emacs") -- start Emacs silently (no focus)
					hs.timer.doAfter(2, function() -- give server a moment, then retry once
						eval(sexp, callback)
					end)
				end
			else
				log.e("emacsclient error (" .. tostring(exitCode) .. "): " .. stderr)
			end
		end
	end, { "--eval", sexp })
	emacsTask:start()
end

local function notifyClockStopped()
	hs.notify
		.new({
			title = "Org Clock",
			informativeText = "⏱ Clock stopped",
			autoWithdraw = true,
		})
		:send()
end

local function clockOut()
	eval("(my/hs-org-clock-out)", function(_) end)
end

local function gotoTimer()
	eval("(my/hs-org-clock-goto)", function(_)
		-- ensure Emacs is focused even if it was closed/minimized
		hs.execute("open -a Emacs")
	end)
end

local function update()
	--log.i("tick") -- <— see ticks in Hammerspoon Console
	eval(
		"(my/hs-org-clock-status)", -- or your current sexp
		function(value)
			local s = truncateUtf8WordBoundary(unquote(trim(value)), 30)
			local pomodoroActive = (s ~= "")

			-- Dont need for now.
			-- if not pomodoroActive and lastPomodoroActive then
			-- 	notifyClockStopped()
			-- end

			lastPomodoroActive = pomodoroActive

			local active = (s ~= "")

			if s == "" then
				menu:setTitle("⏱")
				menu:setMenu({
					{ title = "Go to timer", fn = gotoTimer, disabled = true },
					{ title = "Stop timer", fn = clockOut, disabled = true },
					{
						title = "Open Emacs",
						fn = function()
							hs.execute("open -a Emacs")
						end,
					},
				})
			else
				menu:setTitle(s)
				menu:setMenu({
					{ title = "Go to timer", fn = gotoTimer },
					{ title = "Stop timer", fn = clockOut },
					{
						title = "Open Emacs",
						fn = function()
							hs.execute("open -a Emacs")
						end,
					},
				})
			end
		end
	)
end

local function safeUpdate()
	local ok, err = xpcall(update, debug.traceback)
	if not ok then
		log.e("update() error: " .. tostring(err))
	end
end

-- ✅ Keep a strong reference so the timer isn't GC'd
OrgClockMenubar.timer = hs.timer.doEvery(2, safeUpdate)
--menu._timer = OrgClockMenubar.timer

safeUpdate()

menu:setClickCallback(function()
	hs.execute("open -a Emacs")
end)

function OrgClockMenubar_push(status)
	if status == "out" then
		renderIdle() -- instant flip
	end
	hs.timer.doAfter(0.05, safeUpdate) -- confirm with emacsclient
end

local function renderIdle()
	menu:setTitle("⏱")
	menu:setMenu({
		{ title = "Go to timer", fn = gotoTimer, disabled = true },
		{ title = "Stop timer", fn = clockOut, disabled = true },
		{
			title = "Open Emacs",
			fn = function()
				hs.execute("open -a Emacs")
			end,
		},
	})
end

-- Bind the custom URL: hammerspoon://orgclock?status=in|out
hs.urlevent.bind("orgclock", function(eventName, params)
	local status = params and params.status or ""
	if status == "out" then
		lastActive = false
		renderIdle() -- instant UI feedback
	end
	-- In both cases, verify the real state from Emacs
	hs.timer.doAfter(0.05, safeUpdate)
end)
return menu