bootstrap

#!/usr/bin/env sh
#
# bootstrap.sh
# This script bootstraps the setup of a new machine. It checks
# if the necessary dependencies are installed and installs them
# if needed. After that, it runs the dotfiles script with --install.
#
set -o errexit
set -o nounset
#set -o xtrace

# set `magic` variable to the directory of the script
__dir="$(cd "$(dirname "$0")" && pwd)"
__file="${__dir}/$(basename "$0")"
__base="$(basename ${__file})"
__root="$(cd "$(dirname "${__dir}")" && pwd)"

install_zsh() {
	dist=$(uname -s)
	local uid=$(id -u)

	if [ "$dist" = "Linux" ]; then
		if [ -f /etc/os-release ]; then
			local v=$(cat /etc/os-release | grep -i -e "^id=" | sed -r "s/^id=(.+)/\1/i")
			if [ "$v" = "debian" ] || [ "$v" = "ubuntu" ]; then
				cmd="apt-get -y install zsh"
				[ $uid -gt 0 ] && cmd="sudo $cmd"
				$cmd
			elif [ "$v" = "arch" ]; then
				cmd="pacman -S zsh"
				[ $uid -gt 0 ] && cmd="sudo $cmd"
				cmd
			else
				echo "linux variant not supported: $v" && exit 1
			fi
		else
			echo "not supported" && exit 1
		fi
	fi

	echo ""
	zsh=$(command -v zsh)
	echo "Setting 'zsh' as login shell, enter your"
	echo "password when prompted"
	if [ $uid -eq 0 ]; then
		chsh -s "$zsh" $SUDO_USER || exit 1
	else
		chsh -s "$zsh" || exit 1
	fi
	echo ""
	echo "You need to logout and login again or reboot and call this script again:"
	echo "$__file"
	exit 0
}

echo ""
if [ "$(expr "$SHELL" : '.*/\(.*\)')" = "zsh" ]; then
	zsh "$__dir/dotfiles install"
else
	echo "'zsh' is not your default shell, these dotfiles are build on zsh."
	read -p "Install 'zsh' and call \`chsh /usr/bin/zsh\` now [Y/n]" a
	[ "$a" = "" ] && a=y
	[ "$a" = "y" ] || [ "$a" = "Y" ] && install_zsh || exit 0
fi