fixup tests

modules/docker.nix

@@ -0,0 +1,94 @@
+{ config, lib, pkgs, docker, ... }:
+
+with lib;
+let
+  cfg = config.docker;
+in
+{
+  imports = [ ./base.nix ];
+
+  options.docker = {
+    registry.url = mkOption {
+      description = "Default registry url where images are published";
+      type = types.str;
+      default = "";
+    };
+
+    images = mkOption {
+      description = "Attribute set of docker images that should be published";
+      type = types.attrsOf (types.submodule ({ name, config, ... }: {
+        options = {
+          image = mkOption {
+            description = "Docker image to publish";
+            type = types.nullOr types.package;
+            default = null;
+          };
+
+          name = mkOption {
+            description = "Desired docker image name";
+            type = types.str;
+            default = builtins.unsafeDiscardStringContext config.image.imageName;
+          };
+
+          tag = mkOption {
+            description = "Desired docker image tag";
+            type = types.str;
+            default = builtins.unsafeDiscardStringContext config.image.imageTag;
+          };
+
+          registry = mkOption {
+            description = "Docker registry url where image is published";
+            type = types.str;
+            default = cfg.registry.url;
+          };
+
+          path = mkOption {
+            description = "Full docker image path";
+            type = types.str;
+            default =
+              if config.registry != ""
+              then "${config.registry}/${config.name}:${config.tag}"
+              else "${config.name}:${config.tag}";
+          };
+        };
+      }));
+      default = { };
+    };
+
+    export = mkOption {
+      description = "List of images to export";
+      type = types.listOf types.package;
+      default = [ ];
+    };
+
+    copyScript = mkOption {
+      description = "Image copy script";
+      type = types.package;
+      default = docker.copyDockerImages {
+        dest = "docker://${cfg.registry.url}";
+        images = cfg.export;
+      };
+    };
+  };
+
+  config = {
+    # define docker feature
+    _m.features = [ "docker" ];
+
+    # propagate docker options if docker feature is enabled
+    _m.propagate = [{
+      features = [ "docker" ];
+      module = { config, name, ... }: {
+        # propagate registry options
+        docker.registry = cfg.registry;
+      };
+    }];
+
+    # pass docker library as param
+    _module.args.docker = import ../lib/docker { inherit lib pkgs; };
+
+    # list of exported docker images
+    docker.export = mapAttrsToList (_: i: i.image)
+      (filterAttrs (_: i: i.registry != null) config.docker.images);
+  };
+}