Create the one liner and doco to use this quickly and easily

[ausfestivus]

I will soon be doing a rebuild of my main machine.
Will use this activity as a chance to

• make the use of this script easier (ala one liner)
• knock off the bugs
• templatise and secure my terraform and AWS credentials scripts
• review the enhancements and see which ones I want.

[ausfestivus]

Found a good example for the one liner in https://github.com/ausfestivus/andrews-configs/blob/master/hostbuild/macos-desktop-build.sh

    # installations and configurations.
    notice "Installing sundry items..."
    info "  Installing homebrew-notifier..."
    [[ -f "${HOME}/.homebrew-notifier/notifier.sh" ]] || curl -fsS https://raw.githubusercontent.com/grantovich/homebrew-notifier/master/install.sh | sh
    success "  homebrew-notifier installed."
  }

[ausfestivus]

Re this:

• templatise and secure my terraform and AWS credentials scripts

? Can I get the TF ENV setting script to behave like the AWS one? This would allow me to have just the outline of the scripts in source control here without having to store the credentials in the scripts.
? Ensure I have an easy way to switch between Azure tenancies. Does something similar to the AWS switcher im currently using exist for Azure?