Interactive update script

update.sh

#!/bin/bash

last_check=''

skip_next_confirm="false"

function skipNextConfirm {
  skip_next_confirm="true"
  return 0
}

# check if command outputs something
function check {
  echo "-> $*"
  local output="$(script -q /dev/null $@ 2>&1 | tee /dev/tty)"
  last_check="$output"

  if [ -z "$output" ]
    then         return 1 # output is empty, return false
    else echo && return 0 # output is of non-zero length, return true
  fi
}

# prompt the user to run the command
function confirm {
  local command="-> $*"

  if [ "$skip_next_confirm" = "true" ]; then
    skip_next_confirm="false"

    echo "$command  (skipped)"
    return 1
  fi

  read -r -n 1 -p "$command  [Y/n] " response
  [[ ! "$response" = "" ]] && echo
  [[ ! "$response" =~ ^[yY]?$ ]] && return 1
  $@
}


if check npm -g outdated; then
  ! (echo "$last_check" | grep '\<npm\>' > /dev/null) && skipNextConfirm 
  confirm npm -g i npm
  confirm npm -g update
fi
echo

if check pnpm -g outdated --long --no-table; then
  ! (echo "$last_check" | grep '\<pnpm\>' > /dev/null) && skipNextConfirm 
  confirm pnpm -g i pnpm
  confirm pnpm -g update --interactive
fi
echo

if confirm brew update; then
  if check brew outdated; then
    confirm brew upgrade
  fi
fi