setup.sh

#!/bin/bash

fancy_echo() {
	local fmt="$1"; shift
	printf "\n$fmt\n" "$@"
}


set -e

# Ask for password up-front
sudo -v

# Keep-alive: update existing sudo time stamp if set, otherwise do nothing.
while true; do sudo -n true; sleep 60; kill -0 "$$" || exit; done 2>/dev/null &


# install homebrew
if ! command -v brew >/dev/null; then
	fancy_echo "Installing Homebrew ..."
  /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
else
	fancy_echo "Homebrew already installed."
fi


# checkout dotfiles
dotfiles_directory="$HOME/.dotfiles"
if [ ! -d "$dotfiles_directory" ]; then
	fancy_echo "Checking out dotfiles repository ..."
	git clone git@github.com:jjochen/dotfiles.git "$dotfiles_directory"
else 
	fancy_echo "Dotfiles directory already exists."
fi


# bundle Brewfile
fancy_echo "Installing formulas and casks from the Brewfile ..."
if brew bundle --verbose --file="$dotfiles_directory/Brewfile"; then
	fancy_echo "All formulas and casks were installed successfully."
else
	fancy_echo "Some formulas or casks failed to install."
fi


# link dotfiles
fancy_echo "Linking dotfiles ..."
rcup -v


# change shell to zsh
case "$SHELL" in
	*/zsh) :
	fancy_echo "zsh is already current shell."
	;;
*)
	fancy_echo "Changing to zsh ..."
	chsh -s "$(which zsh)"
	;;
esac


# install oh-my-zsh
oh_my_zsh_dir="$HOME/.oh-my-zsh"
if [ ! -d "$oh_my_zsh_dir" ]; then
	fancy_echo "Installing oh-my-zsh ..."
	sh -c "$(curl -fsSL https://raw.githubusercontent.com/robbyrussell/oh-my-zsh/master/tools/install.sh)"
else
	fancy_echo "oh-my-zsh already installed."
fi


# install ruby
latest_installed_ruby() {
	find "$HOME/.rubies" -maxdepth 1 -name 'ruby-*' | tail -n1 | grep -Eo '\d+\.\d+\.\d+'
}

if [ -z "$(latest_installed_ruby)" ]; then
	fancy_echo 'Installing ruby ...'
	ruby-install ruby
else
	fancy_echo "ruby already installed ..."
fi


# install bundler
fancy_echo "Installing Bundler ..."
gem install bundler

fancy_echo "Configuring Bundler ..."
number_of_cores=$(sysctl -n hw.ncpu)
bundle config --global jobs $((number_of_cores - 1))


# install janus
fancy_echo "Installing janus ..."
curl -L https://bit.ly/janus-bootstrap | bash