Replace deploy script with makefile

Makefile

@@ -0,0 +1,42 @@
+NIXOS_VERSION := 19.09
+NIXOS_PREFIX  := $(PREFIX)/etc/nixos
+NIXOS_FLAGS   := -I my=$(PWD)
+
+
+all: channels config secrets.nix test
+
+install: result channels update config
+	@nixos-generate-config --root "$(PREFIX)"
+	@nixos-install --root "$(PREFIX)"
+
+upgrade: update switch
+
+switch:
+	@sudo nixos-rebuild $(NIXOS_FLAGS) switch
+
+test:
+	@sudo nixos-rebuild $(NIXOS_FLAGS) test
+
+clean:
+	@rm -f secrets.nix
+
+
+# Parts
+update:
+	@sudo nix-channel --update
+
+config: $(NIXOS_PREFIX)/configuration.nix
+
+channels:
+	sudo nix-channel --add "https://nixos.org/channels/nixos-${NIXOS_VERSION}" nixos
+	sudo nix-channel --add "https://github.com/rycee/home-manager/archive/release-${NIXOS_VERSION}.tar.gz" home-manager
+	sudo nix-channel --add "https://nixos.org/channels/nixpkgs-unstable" nixpkgs-unstable
+
+$(NIXOS_PREFIX)/configuration.nix:
+	@sudo mkdir -p "$(NIXOS_PREFIX)"
+	@echo "import ../dotfiles \"$$(hostname)\"" | sudo tee "$(NIXOS_PREFIX)/configuration.nix"
+
+secrets.nix: secrets.nix.gpg
+	gpg -dq $< > $@
+
+.PHONY: update config channels test upgrade install