# Build the nitweb config from `toolcontext` options.
	fun build_config(toolcontext: ToolContext, mainmodule: MModule): NitwebConfig do

		var model = toolcontext.modelbuilder.model

		var filter = new ModelFilter(
			if toolcontext.opt_no_private.value then protected_visibility else private_visibility,
			accept_fictive = not toolcontext.opt_no_fictive.value,
			accept_empty_doc = not toolcontext.opt_no_empty_doc.value,
			accept_test = not toolcontext.opt_no_test.value,
			accept_attribute = not toolcontext.opt_no_attribute.value
		)

		var catalog = build_catalog(toolcontext.modelbuilder, filter)

		var config = new NitwebConfig(model, mainmodule, toolcontext.modelbuilder, filter, catalog)
		var config_file = toolcontext.opt_config.value
		if config_file == null then config.default_config_file = "nitweb.ini"
		config.parse_options(args)
		var opt_host = toolcontext.opt_host.value
		if opt_host != null then config.ini["app.host"] = opt_host
		var opt_port = toolcontext.opt_port.value
		if opt_port >= 0 then config.ini["app.port"] = opt_port.to_s
		return config
	end