vmalert: Fail if encountering missing rule paths (#514441)

    in

    attrsOf (either valueType (listOf valueType));

  mkCliVal = value: if isPath value then "${value}" else toString value;

  mkLine =

    key: value:

    if value == true then

      "-${key}"

    else if isList value then

      concatMapStringsSep " " (v: "-${key}=${escapeShellArg (toString v)}") value

      concatMapStringsSep " " (v: "-${key}=${escapeShellArg (mkCliVal v)}") value

    else

      "-${key}=${escapeShellArg (toString value)}";

      "-${key}=${escapeShellArg (mkCliVal value)}";

  vmalertName = name: "vmalert" + lib.optionalString (name != "") ("-" + name);

  enabledInstances = lib.filterAttrs (name: conf: conf.enable) config.services.vmalert.instances;