1  #!/usr/bin/env bash
  2  
  3  notify() {
  4  	echo -e "\033[0;34m[i]\033[0m $1" >&2
  5  }
  6  
  7  error() {
  8  	echo -e "\033[0;31m[x]\033[0m $1" >&2
  9  	exit 1
 10  }
 11  
 12  acquire_sudo() {
 13  	if [[ $UID == 0 ]]; then
 14  		notify "Running as root"
 15  		SUDO=""
 16  	elif $(sudo -v); then
 17  		notify "Got sudo permissions"
 18  		SUDO="sudo"
 19  	else
 20  		error "Failed to get sudo permissions"
 21  	fi
 22  }
 23  
 24  prompt() {
 25  	echo -en "\033[0;33m[?]\033[0m $1 \033[0;33m(y/N)\033[0m "
 26  	read -r INPUT
 27  
 28  	[[ "$INPUT" =~ ^[Yy]$ ]] && return 0 || return 1
 29  }
 30  
 31  # Variables
 32  OS=$(uname -s)
 33  DOTDIR="$HOME/_/"
 34  DOTDIR_REPO="https://github.com/0x616e6f73/_"
 35  
 36  NIX_SCRIPT="https://install.determinate.systems/nix"
 37  BREW_SCRIPT="https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh"
 38  
 39  # Requirements
 40  command -v git &>/dev/null || error "'git' is not installed"
 41  command -v curl &>/dev/null || error "'curl' is not installed"
 42  acquire_sudo
 43  
 44  # Install Homebrew if not already installed
 45  if ! command -v /opt/homebrew/bin/brew &>/dev/null; then
 46  	notify "Installing Homebrew"
 47  
 48  	curl -fsSL "$BREW_SCRIPT" | NONINTERACTIVE=1 bash
 49  	eval $(/opt/homebrew/bin/brew shellenv)
 50  else
 51  	notify "Homebrew is already installed"
 52  fi
 53  
 54  # Install Rosetta if not already installed
 55  if ! command -v pkgutil --pkg-info com.apple.pkg.RosettaUpdateAuto &>/dev/null; then
 56  	notify "Installing Rosetta"
 57  	softwareupdate --install-rosetta --agree-to-license
 58  else
 59  	notify "Rosetta is already installed"
 60  fi
 61  
 62  # Install Nix if not already installed (using Determinate Systems installer)
 63  if ! launchctl print system/org.nixos.nix-daemon &>/dev/null; then
 64  	notify "Installing Nix (Determinate Systems)"
 65  	curl -fsSL "$NIX_SCRIPT" | sh -s -- install --determinate
 66  	source /etc/bashrc
 67  else
 68  	notify "Nix is already installed"
 69  	source /etc/static/bashrc
 70  fi
 71  
 72  if [[ ! -d "$DOTDIR" ]]; then
 73  	notify "Cloning dotfiles from $DOTDIR_REPO"
 74  	git clone "$DOTDIR_REPO" "$DOTDIR"
 75  else
 76  	notify "Dotfiles are already cloned"
 77  fi
 78  
 79  # Build and configure nix-darwin
 80  if ! command -v darwin-rebuild &>/dev/null; then
 81  	notify "Installing nix-darwin"
 82  
 83  	# flake.nix expects "net-2" as the hostname
 84  	$SUDO scutil --set LocalHostName net-2
 85  	dscacheutil -flushcache
 86  
 87  	# After nix-darwin is installed and configured it's in the PATH
 88  	command nix build .#darwinConfigurations.$(hostname -s).system \
 89  		--extra-experimental-features "nix-command flakes"
 90  
 91  	# We need to link run to private/var/run for nix-darwin
 92  	if ! grep -q "private/var/run" /etc/synthetic.conf; then
 93  		notify "Appending nix-darwin path to /etc/synthetic.conf"
 94  
 95  		printf "run\tprivate/var/run\n" | $SUDO tee -a /etc/synthetic.conf
 96  		/System/Library/Filesystems/apfs.fs/Contents/Resources/apfs.util -t
 97  	else
 98  		notify "nix-darwin path already exists in /etc/synthetic.conf"
 99  	fi
100  
101  	# Run nix-darwin's rebuild command
102  	$DOTDIR/result/sw/bin/darwin-rebuild switch --flake $DOTDIR
103  else
104  	notify "nix-darwin is already installed"
105  fi