Zsh custom config in workstation-setup

configuration-zsh.sh

echo
echo "Configuring zsh"
brew install grc
brew install coreutils
brew install watch
brew install z
touch ~/.z
brew install zsh zsh-completions
sh -c "$(curl -fsSL https://raw.githubusercontent.com/robbyrussell/oh-my-zsh/master/tools/install.sh)"
cp files/dircolors.ansi-dark ~/.dircolors
cp files/.inputrc ~/.inputrc

echo 
echo "Customizing oh-my-zsh configuration"
/usr/bin/env ruby <<-EORUBY
	def append_if_missing(subject, substring)
		if !subject.include? substring
			subject += "\n" + substring + "\n"
		end
		return subject
	end

	filepath = ENV['HOME'] + '/.zshrc'
	config = File.read(filepath)
	config = config.gsub(/plugins=\(\R\s+git\R/, "plugins=(\n\tgit mvn\n")
	config = append_if_missing(config, "eval \"\$(direnv hook zsh)\"")
	config = append_if_missing(config, ". /usr/local/etc/profile.d/z.sh")
	File.open(filepath, "w") {|file| file.puts config}
EORUBY