OSX update and upgrade package management : home-brew, rubygem, npm and so on

upgrade-package-management.sh

#!/bin/bash -       
#title           :upgrade-package-management.sh
#description     :update and upgrade various package management and installed packages 
#author          :Franco Rondini
#date            :20181223
#version         :0.1-ALPHA-DO-NOT-USE-AS-IS-IN-PRODUCTION   
#usage: comment out the package management that are not of your iterest and/or add the missing ones then launch the script in bash
#credits:
#  - with reference to: 
#     - https://forum.shakacode.com/t/when-to-brew-update-and-brew-upgrade/350/3
#     - https://github.com/Homebrew/homebrew-cask/blob/master/USAGE.md
#
# Get OS X Software Updates 
alias update='sudo softwareupdate -i -a

# Installing Command Line Tools in Mac OS X
xcode-select --install

# Update and upgrade Homebrew
brew update
brew upgrade --all
# - optional check what's recently upgraded
# ls -lrt /usr/local/Cellar/

# upgrade Homebrew Cask
#   - check for outdated Casks 
brew cask outdated
#   - install the outdated Casks
brew cask upgrade
#   - optional check what's recently upgraded
# ls -lrt /usr/local/Caskroom/

brew cleanup
# very useful, when I had not heard of it before, for example I got:
#   ==> This operation has freed approximately 12.5GB of disk space.


# Update and upgrade npm and their installed packages
# https://stackoverflow.com/questions/16151018/npm-throws-error-without-sudo
sudo chown -R $(whoami) ~/.npm
sudo chown -R $(whoami) ~/.npm-packages

npm i -g npm
npm update -g

# Update installed Ruby gems
sudo gem update --system
sudo gem update
rbenv rehash

# Upgrade oh_my_zsh
upgrade_oh_my_zsh