MacOS zsh terminal notification hooks for long executed operations

.hooksrc

# here i am using terminal-notifier
# https://github.com/julienXX/terminal-notifier
# you can use your own solution

# main setting stored in variable
# local execution_treshold=30
# if your process executed more than 30 seconds
# you will get notified


function sysnotify() {
  terminal-notifier -group 'background' -title 'Background process' -message '✅' -subtitle 'finished' -sound glass
}

# definition of zsh hook
function preexec() {
  cmd_execution_begin_time=$(date +%s)
}

# definition of zsh hook
function precmd() {
  # alternative to cmd_execution_end_time
  local cmd_new_prompt_time=$(date +%s)
  
  # seconds
  local execution_treshold=30

  # check time exists for cmd initialization
  if [[ -v cmd_execution_begin_time ]]; then
  else
    cmd_execution_begin_time=cmd_new_prompt_time
  fi

  local last_execution_time=$((cmd_new_prompt_time - cmd_execution_begin_time))

  if (($last_execution_time > $execution_treshold))
  then
    sysnotify
  fi
}

.zshrc

# i prefer to store configs in separated files
# so add this line in your .zshrc

source ~/.hooksrc