travis-nix-bootstrap.sh

#!/usr/bin/env bash
# usage: 
# bash <(curl -sS https://gist.githubusercontent.com/timbertson/f643b8ae3a175ba8da7f/raw/travis-nix-bootstrap.sh)
# source $HOME/.nix-profile/etc/profile.d/nix.sh

_() {
set -eu
export NIX_CURL_FLAGS=-sS
if [ ! -e /nix ]; then
	if [ "${CI:-null}" != "true" ]; then
		echo "It looks like you're not a CI server, and you don't have a /nix folder. Aborting."
		exit 1
	fi
	echo "=== Installing Nix..."
	# Install Nix
	bash <(curl -sS https://nixos.org/nix/install)

	# Make sure we can use hydra's binary cache
	sudo mkdir /etc/nix
	sudo tee /etc/nix/nix.conf <<EOF >/dev/null
binary-caches = http://cache.nixos.org http://hydra.nixos.org
trusted-binary-caches = http://hydra.nixos.org
build-max-jobs = 4
EOF
fi
}

_