nixos/redmine: Use attribute set for storing database settings

  format = pkgs.formats.yaml {};

  bundle = "${cfg.package}/share/redmine/bin/bundle";

  databaseYml = pkgs.writeText "database.yml" ''

    production:

      adapter: ${cfg.database.type}

      database: ${cfg.database.name}

      host: ${if (cfg.database.type == "postgresql" && cfg.database.socket != null) then cfg.database.socket else cfg.database.host}

      port: ${toString cfg.database.port}

      username: ${cfg.database.user}

      password: #dbpass#

      ${optionalString (cfg.database.type == "mysql2" && cfg.database.socket != null) "socket: ${cfg.database.socket}"}

  '';

  databaseSettings = {

    production = {

      adapter = cfg.database.type;

      database = cfg.database.name;

      host = if (cfg.database.type == "postgresql" && cfg.database.socket != null) then cfg.database.socket else cfg.database.host;

      port = cfg.database.port;

      username = cfg.database.user;

    } // optionalAttrs (cfg.database.passwordFile != null) {

      password = "#dbpass#";

    } // optionalAttrs (cfg.database.type == "mysql2" && cfg.database.socket != null) {

      socket = cfg.database.socket;

    };

  };

  databaseYml = format.generate "database.yml" databaseSettings;

  configurationYml = format.generate "configuration.yml" cfg.settings;

  additionalEnvironment = pkgs.writeText "additional_environment.rb" cfg.extraEnv;