Automatically backup Kobo eReader with Hammerspoon

README.md

Example config to automatically backup Kobo eReader to ~/Backups/Kobo/ whenever it is mounted using rsync. Can be copied to Hammerspoon init.lua config file.

Tested on Hammerspoon 0.9.100, macOS 14.2.

init.lua

local log = hs.logger.new("kobobackup")
local koboMountPath = "/Volumes/KOBOeReader"
local koboBackupDirectory = os.getenv("HOME") .. "/Backups/Kobo/"
local pendingTask = nil
local restartBackup = false
local function backupKobo()
  if hs.fs.volume.allVolumes()[koboMountPath] == nil then
    log.i("Kobo volume unmounted; skipping backup")
  elseif pendingTask == nil then
    local startTime = hs.timer.absoluteTime()
    pendingTask = hs.task.new("/usr/bin/rsync", function()
      pendingTask = nil
      if restartBackup then
        log.i("Kobo backup restarting...")
        restartBackup = false
        backupKobo()
      else
        local endTime = hs.timer.absoluteTime()
        local diffMs = (endTime - startTime) / 1000000
        hs.alert.show("Backed up Kobo")
        log.f("Kobo backup finished in %.fms", diffMs)
      end
    end, {
      "--archive",
      "--update",
      "--delete",
      "--exclude",
      ".Trashes",
      "--exclude",
      ".Spotlight-V100",
      koboMountPath,
      koboBackupDirectory,
    }):start()
    log.i("Kobo backup started")
  else
    restartBackup = true
    log.i("Kobo backup invalidated due to file system change")
  end
end

koboPathwatcher = hs.pathwatcher.new(koboMountPath, backupKobo):start()
backupKobo()