Wrong error message in blackbox exporter libsonnet

[konchinshih]

What happened?

This line cause some misleading message when configmapReloaderImage is not provided.

Jsonnet Output:

RUNTIME ERROR: must provide version
        vendor/kube-prometheus/components/blackbox-exporter.libsonnet:31:28-56  object <defaults>
        vendor/kube-prometheus/components/blackbox-exporter.libsonnet:200:14-47 object <reloader>
        Field "image"
        Array element 1
        Field "containers"
        Field "spec"
        Field "template"
        Field "spec"
        Field "deployment"
        During manifestation

Did you expect to see some different?
Fix the error message to what it should be.

How to reproduce it (as minimally and precisely as possible):

local blackboxExporter = import 'kube-prometheus/components/blackbox-exporter.libsonnet';

blackboxExporter({
  name:: 'name',
  image:: 'image',
  namespace:: 'namespace',
  version:: 'version',
  kubeRbacProxy:: 'kubeRbacProxy',
})

Environment

{
  description = "kubernetes prometheus dev environment flake";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
  };

  outputs = { self, nixpkgs }:
    let
      system = "x86_64-linux";
      pkgs = import nixpkgs { inherit system; };
      systemFishConfig = "${pkgs.fish}/share/fish/config.fish";
    in
    {
      devShells.${system}.default = pkgs.mkShell {
        packages = with pkgs; [
          fish
          go-jsonnet
          jsonnet-bundler
          yq-go
          kustomize
          kubectl
          json2yaml
          yaml2json
        ];
        shellHook = ''
          exec fish -p "${systemFishConfig}" -C '
            function fish_prompt;
              set_color blue;
              echo -n "(nix-dev) ";
              set_color normal;
              echo -n $(basename $(pwd)) "> ";
            end;
          '
        '';
      };
    };
}

Anything else we need to know?: