Clean unused packages installed by Homebrew

brew-clean.sh

expected=(
# paste packages to keep here
aria2
deno
fzf
yarn
)

brew_clean() {
  while
    leaves=(`brew leaves`)
    to_be_removed=()
    for dep in $leaves; do
      if [ ${expected[(ie)$dep]} -gt ${#expected} ]; then
        to_be_removed+=( $dep )
      fi
    done
    [ ${#to_be_removed} -gt 0 ]
  do
    echo To be removed: ${to_be_removed[@]}
    read -q confirm\?"Confirm? [y/n] "
    echo
    if [ "$confirm" = y ]; then
      brew uninstall ${to_be_removed[@]}
    else
      break
    fi
  done
  if [ ${#to_be_removed} -eq 0 ]; then
    echo All clean
  fi
}

brew_clean