$(eval HOSTNAME=$(shell hostname))
HOMEMANAGER_CONFIG := $(PWD)/home/$(HOSTNAME)/$(USER).nix
CONFIG_DIR := $(if $(XDG_CONFIG_HOME), $(XDG_CONFIG_HOME), $(HOME)/.config)
HOMEMANAGER_CONFIG_DIR := $(CONFIG_DIR)/home-manager
SUBMODULES := $(CONFIG_DIR)/nvim

.PHONY: default clean nixos home /etc/nixos/config

default: $(SUBMODULES)
	git submodule update
	command -v nix > /dev/null || exit 1
	[ -e /etc/nixos/ ] && make nixos || make home
	bat cache --build

clean:
	-[ -e /etc/nixos ] && sudo rm /etc/nixos/config || rm -rf $(HOMEMANAGER_CONFIG_DIR)
	-rm $(SUBMODULES)

nixos: /etc/nixos/config
	sudo nixos-rebuild switch

home: $(HOMEMANAGER_CONFIG_DIR)/home.nix
	home-manager switch

/etc/nixos/config:
	sudo rsync -avz --exclude-from=.rsyncignore --filter=':- .gitignore' --delete-during --delete-excluded ./ $@

$(HOMEMANAGER_CONFIG):
	touch $@

$(HOMEMANAGER_CONFIG_DIR)/home.nix: $(HOMEMANAGER_CONFIG) $(HOMEMANAGER_CONFIG_DIR) /nix
	-ln -s $(HOMEMANAGER_CONFIG) $@

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

$(SUBMODULES): $(CONFIG_DIR)/%: %
$(SUBMODULES):
	-ln -s $$(readlink -f $?) $(CONFIG_DIR)/