Things to install on a fresh Mac: bash <(curl -fsSL https://gist.github.com/mnem/6560977/raw/install_all_the_things.sh)

install_all_the_things.sh

#!/usr/bin/env bash

function execute_after_confirm {
	read -p "$1 ($2) ? [y/n] " -n 1 -r
	echo
	if [[ $REPLY =~ ^[Yy]$ ]]
	then
		shift
		for var in "$@"
		do
			echo $var
			eval $var
			return_code=$?
			if [[ $return_code != 0 ]] ; then
				exit $return_code
			fi
		done
	fi
}

execute_after_confirm \
	'Generate SSH keys' \
	"ssh-keygen -t rsa -C \"`uname -n`\"" \
	'pbcopy < ~/.ssh/id_rsa.pub  ##### Copied key to clipboard #####'

execute_after_confirm \
	'Install Homebrew' \
	'ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"' \
	'brew doctor'

ALL_THE_THINGS=\
'git'\
' tmux'\
' the_silver_searcher'\
' grc'\
' cmake'\
' nmap'\
' figlet'\
' gibo'\
' parallel'\
' uncrustify'\
' toilet'\
' tree'\
' htop'\
' chruby'\
' ruby-install'

execute_after_confirm \
	'Install useful packages' \
	"brew install $ALL_THE_THINGS"

RUBY_VERSION="2.2.3"
execute_after_confirm \
	"Install Ruby" \
	"ruby-install ruby $RUBY_VERSION" \
	'source /usr/local/share/chruby/chruby.sh' \
	"chruby $RUBY_VERSION"

execute_after_confirm \
	"Install Homesick" \
	'gem install homesick' \
	'homesick clone git@github.com:mnem/dotty_bash.git' \
	'homesick symlink dotty_bash' \
	'homesick clone git@github.com:mnem/dotty_tmux.git' \
	'homesick symlink dotty_tmux'

One line execute:

bash <(curl -fsSL https://gist.github.com/mnem/6560977/raw/install_all_the_things.sh)

Also, why it's a terrible idea to execute scripts like this:

• http://blog.existentialize.com/dont-pipe-to-your-shell.html