$(eval HOSTNAME=$(shell hostname))
NIXOS_REPO := https://git.xenia.me.uk/xenia/nixos.git
NVIM_REPO := https://git.xenia.me.uk/xenia/nvim.git
HOMEMANAGER_CONFIG := $(PWD)/home/$(HOSTNAME)/$(USER).nix
CONFIG_DIR := $(if $(XDG_CONFIG_HOME), $(XDG_CONFIG_HOME), $(HOME)/.config)
BIN_DIR := $(HOME)/.local/bin
HOMEMANAGER_CONFIG_DIR := $(CONFIG_DIR)/home-manager

.PHONY: default all clean nixos home nvim

default:
	[ -e /etc/nixos/ ] && make nixos || make home

all: default nvim

clean:
	[ -e $(HOMEMANAGER_CONFIG_DIR) ] && rm -rf $(HOMEMANAGER_CONFIG_DIR)

nixos: /etc/nixos/config

home: $(HOMEMANAGER_CONFIG_DIR)/home.nix

nvim: $(CONFIG_DIR)/nvim

/nix:
	command -v nix > /dev/null || echo "Install nix package manager before continuing"; exit 1

/etc/nixos/config:
	sudo git clone $(NIXOS_REPO) $@

$(HOMEMANAGER_CONFIG_DIR)/home.nix: $(HOMEMANAGER_CONFIG_DIR) /nix
	[ -f $(HOMEMANAGER_CONFIG) ] || touch $(HOMEMANAGER_CONFIG)
	ln -s $(HOMEMANAGER_CONFIG) $@

$(CONFIG_DIR) $(HOMEMANAGER_CONFIG_DIR) $(BIN_DIR):
	mkdir -p $@

$(CONFIG_DIR)/nvim: $(CONFIG_DIR)
	git clone $(NVIM_REPO) $@