BASH - SPINNER 3

spinner3.sh

**ONE MORE SPINNER**

DEFAULT_SpinnerFrames=("—" "\\" "|" "/")

##@function: spinner(action, label, &spinnerFramesRef[])
##
##@description: Perform an action asynchronously and display
##spinner till action is completed
##
##@param action: The action the execute
##@param label: The label to display while waiting
##@param spinnerRef: In case you feel like a custom spinner, pass a ref to an array of strings
spinner() {
  local frameRef
  local action="${1}"
  local label="${2} "
  local spinnerRef="${3-DEFAULT_SpinnerFrames}"
  local spinnerFrames=$(eval "echo \${!${spinnerRef}[@]}")

  spinnerRun() {
    while true; do
      for frame in ${spinnerFrames[@]}; do
        frameRef="${spinnerRef}[${frame}]"
        echo "${label}${!frameRef}"
        tput cuu1 tput el
        sleep 0.2
      done
    done
    echo -e "\r"
  }

  spinnerRun &
  local spinnerPid=$!
  ${action}
  kill "${spinnerPid}"
}