Interactive script to run brew doctor, brew upgrade and brew cleanup on macOS

brew-upgrade.sh

#!/bin/bash

BLUE='\033[1;34m'
GREEN='\033[1;32m'
PURPLE='\033[1;35m'
RED='\033[1;31m'
RESET='\033[0m'
WHITE='\033[1;37m'
YELLOW='\033[1;33m'

# Homebrew paths (from `brew doctor`)
HOMEBREW_PATHS=$(echo /usr/local/{bin,etc,sbin,share,share/doc})

# First check with brew doctor
echo -e "${WHITE}Running ${PURPLE}brew doctor${RESET}"
brew doctor

# If there was a non-zero exit status offer to fix paths
if [ $? -ne 0 ]; then
  while true; do
    echo -e "\n${YELLOW}Warning:${WHITE} non-zero exit status from ${PURPLE}brew doctor${RESET}"
    read -p "Attempt to fix homebrew paths? [Y/n] " yn
    case $yn in
      [Yy]*|'' )
        # Warn the user we need to use sudo
        echo -e "${WHITE}Claiming ownership of paths in ${BLUE}/usr/local/${RESET} (requires sudo)"
        sudo chown -R $(whoami) $HOMEBREW_PATHS
        chmod u+w $HOMEBREW_PATHS
        break
        ;;
      [Nn]*|* )
        echo -e "${RED}Aborted${RESET}"
        exit 0
        ;;
    esac
  done
fi

# Run the main brew update command
echo -e "\n${WHITE}Running ${PURPLE}brew upgrade${RESET}"
brew upgrade

# Clean up after with brew cleanup
echo -e "${WHITE}Running ${PURPLE}brew cleanup${RESET}"
brew cleanup

# We done!
echo -e "${GREEN}Success${RESET}"