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installed_nginx_sites = $(wildcard /etc/nginx/http.d/*.joeac.net.conf)
installed_nginx_subdomains = $(installed_nginx_sites:/etc/nginx/http.d/%.joeac.net.conf=%)
nginx_subdomains_to_remove = $(filter-out $(NGINX_SUBDOMAINS),$(installed_nginx_subdomains))
nginx_sites_to_remove = $(nginx_subdomains_to_remove:%=/etc/nginx/http.d/%.joeac.net.conf)
nginx_module_config_template = \
	$(if $(PORT_$(module)),nginx/http.d/reverse_proxy.conf.template) \
	$(if $(PUBLIC_ROOT_DIR_$(module)),nginx/http.d/static.conf.template)
nginx_module_config_template_args = \
	DOMAIN=$(if $(filter-out @,$(SUBDOMAIN_$(module))),$(SUBDOMAIN_$(module)).)joeac.net \
	$(if $(PORT_$(module)),PORT=$(PORT_$(module)) HOST=$(HOST_$(module))) \
	$(if $(PUBLIC_ROOT_DIR_$(module)),ROOT="$(PUBLIC_ROOT_DIR_$(module))")

define install_nginx_module_rule =
.PHONY: install_nginx_$(module)
install_nginx_$(module): $(if $(SUBDOMAIN_$(module)),/etc/nginx/http.d/$(SUBDOMAIN_$(module)).joeac.net.conf)
endef

define reinstall_nginx_module_rule =
.PHONY: reinstall_nginx_$(module)
reinstall_nginx_$(module): $(if $(SUBDOMAIN_$(module)),/etc/nginx/http.d/$(SUBDOMAIN_$(module)).joeac.net.conf)
endef

define uninstall_nginx_module_rule =
.PHONY: uninstall_nginx_$(module)
uninstall_nginx_$(module):
	$(if $(SUBDOMAIN_$(module)),sudo rm -f /etc/nginx/http.d/$(SUBDOMAIN_$(module)).joeac.net.conf)
endef

define remove_nginx_site_rule =
remove_$(site):
	rm -f $(site)
endef

define nginx_module_config_rule =
/etc/nginx/http.d/$(SUBDOMAIN_$(module)).joeac.net.conf: $(nginx_module_config_template) /etc/nginx/http.d /etc/nginx/nginx.conf
	$(nginx_module_config_template_args) envsubst -i $$< -o $$(notdir $$@).tmp
	sudo cp $$(notdir $$@).tmp $$@
	sudo rc-service nginx restart
endef

$(foreach module,$(ALL_MODULES),$(eval $(install_nginx_module_rule)))
$(foreach module,$(ALL_MODULES),$(eval $(reinstall_nginx_module_rule)))
$(foreach module,$(ALL_MODULES),$(eval $(uninstall_nginx_module_rule)))
$(foreach site,$(nginx_sites_to_remove),$(eval $(remove_nginx_site_rule)))
$(foreach module,$(ALL_NGINX_MODULES),$(eval $(nginx_module_config_rule)))

/etc/nginx/http.d:
	sudo mkdir -p /etc/nginx/http.d

.PHONY: remove_/etc/nginx/http.d/%.joeac.net.conf
remove_/etc/nginx/http.d/%.joeac.net.conf:
	rm -f $(@:remove_%=%)

.PHONY: install_nginx
install_nginx: /etc/nginx/nginx.conf $(addprefix install_nginx_,$(NGINX_MODULES))

.PHONY: reinstall_nginx
reinstall_nginx: /etc/nginx/nginx.conf $(add_prefix reinstall_nginx_,$(NGINX_MODULES)) $(addprefix remove_,$(nginx_sites_to_remove))

.PHONY: uninstall_nginx
uninstall_nginx: $(foreach module,$(NGINX_MODULES),uninstall_nginx_$(module))
ifeq ($(shell test -d /etc/nginx/nginx.joeac.net-backup && echo 1 || echo 0),0)
	$(warn No nginx backup config detected: doing nothing)
else
	sudo mv /etc/nginx/nginx.joeac.net-backup /etc/nginx/nginx.conf
	sudo rc-service nginx restart
endif

/etc/nginx/nginx.conf: nginx/nginx.conf /etc/nginx/nginx.joeac.net-backup
	sudo cp $< $@
	sudo rc-service nginx restart

/etc/nginx/nginx.joeac.net-backup:
	sudo mv /etc/nginx/nginx.conf /etc/nginx/nginx.joeac.net-backup