bootstrap.sh

#!/usr/bin/env bash

# Config
LATEST_STABLE=nixpkgs-20.03-darwin

# Variables
ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE}")"; pwd -P)"
NIXPATH="darwin=$ROOT_DIR/nix-darwin:darwin-config=$ROOT_DIR/config/nix-darwin:home-manager=$ROOT_DIR/home-manager:home-manager-config=$ROOT_DIR/config/home-manager:nixpkgs-overlays=$ROOT_DIR/overlays:nixpkgs=$ROOT_DIR/nixpkgs-unstable:nixpkgs-stable=$ROOT_DIR/nixpkgs-stable"

# Functions
do_sudo() {
  [ "$UID" -eq 0 ] || exec sudo bash "$0" "$@"
  echo "✓ sudo authentication successful."
}

init_repo() {
  # Setting up base repo
  cd "$ROOT_DIR"
  git config remote.pjan.url >&- || git remote add pjan git@github.com:pjan/nix.git
  # Setting up nixpkgs-unstable repo
    cd "$ROOT_DIR/nixpkgs-unstable"
  git config remote.channels.url >&- || git remote add channels https://github.com/nixos/nixpkgs-channels
  git remote update channels
  git checkout nixpkgs-unstable 2>/dev/null || git checkout --track channels/nixpkgs-unstable
  git config remote.pjan.url >&- || git remote add pjan git@github.com:pjan/nixpkgs.git
  # Setting up nixpkgs-stable repo
  cd "$ROOT_DIR/nixpkgs-stable"
  git config remote.channels.url >&- || git remote add channels https://github.com/nixos/nixpkgs-channels
  git remote update channels
  git checkout $LATEST_STABLE 2>/dev/null || git checkout --track channels/$LATEST_STABLE
  git config remote.pjan.url >&- || git remote add pjan git@github.com:pjan/nixpkgs.git
  # Setting up nix-darwin
  cd "$ROOT_DIR/nix-darwin"
  git checkout master
  git config remote.pjan.url >&- || git remote add pjan git@github.com:pjan/nix-darwin.git
  # Setting up home-manager
  cd "$ROOT_DIR/home-manager"
  git checkout master
  git config remote.pjan.url >&- || git remote add pjan git@github.com:pjan/home-manager.git
}

install_nix() {
  echo "# Installing Nix Package Manager..."
  if [ -d "$HOME/.nix-profile/" ]; then
    echo "✗ Nix Package Manager already installed."
  else
    sh <(curl https://nixos.org/nix/install) --darwin-use-unencrypted-nix-store-volume
    source ~/.nix-profile/etc/profile.d/nix.sh
    nix-channel --remove nixpkgs
    echo "✓ Nix Package Manager successfully installed."
  fi
}

install_darwin() {
  echo "# Installing nix-darwin..."
  if [ -f "/run/current-system/darwin-version" ]; then
    echo "✗ nix-darwin already installed."
  else
    export NIX_PATH=$NIXPATH
    [ -e /etc/bashrc ] && [ ! -L /etc/bashrc ] && sudo rm /etc/bashrc || true
    [ -e /etc/nix/nix.conf ] && [ ! -L /etc/nix/nix.conf ] && sudo rm /etc/nix/nix.conf || true
    $(nix-build '<darwin>' -A system --no-out-link)/sw/bin/darwin-rebuild build
    $(nix-build '<darwin>' -A system --no-out-link)/sw/bin/darwin-rebuild switch
    @source /etc/bashrc
    echo "✓ nix-darwin successfully installed."
  fi
}

go() {
  init_repo
  install_nix
  install_darwin
}

go

unset do_sudo
unset init_repo
unset install_nix
unset install_darwin
unset go