deployment/data-model-test.nix

@@ -118,7 +118,7 @@ in
                         enable = lib.mkEnableOption "Hello in the shell";
                       };
                     };
-                  resources =
+                  implementation =
                     cfg:
                     lib.optionalAttrs cfg.enable {
                       _class = "fediversity-application-requirements";

deployment/data-model.nix

@@ -26,40 +26,10 @@ let
     };
   };
   nixops4Deployment = import ./deployment.nix { inherit lib inputs; };
-
-  configuration = mkOption {
-    description = "Configuration type declaring options to be set by operators";
-    type = optionType;
-    readOnly = true;
-    default = submoduleWith {
-      class = "fediversity-configuration";
-      modules = [
-        {
-          options = {
-            enable = lib.mkEnableOption {
-              description = "your Fediversity configuration";
-            };
-            applications = lib.mapAttrs (
-              _name: application:
-              mkOption {
-                description = application.description;
-                type = submoduleWith {
-                  class = "fediversity-application-config";
-                  modules = [ application.module ];
-                };
-                default = { };
-              }
-            ) config.applications;
-          };
-        }
-      ];
-    };
-  };
 in
 {
   _class = "fediversity-settings";
   options = {
-    inherit configuration;
     resources = mkOption {
       description = "Collection of deployment resources that can be required by applications and policed by hosting providers";
       type = attrsOf (submoduleWith {
@@ -85,7 +55,6 @@ in
                       {
                         options.apply = mkOption {
                           description = "Apply the policy to a request";
-                          type = optionType;
                         };
                       }
                     ];
@@ -102,7 +71,7 @@ in
       type = attrsOf (submoduleWith {
         class = "fediversity-application";
         modules = [
-          {
+          (application: {
             options = {
               description = mkOption {
                 description = "Description to be shown in the application overview";
@@ -112,12 +81,30 @@ in
                 description = "Operator-facing configuration options for the application";
                 type = deferredModuleWith { staticModules = [ { _class = "fediversity-application-config"; } ]; };
               };
-              resources = mkOption {
+              implementation = mkOption {
                 description = "Mapping of application configuration to deployment resources, a description of what an application needs to run";
-                type = functionTo (types.submodule application-requirements);
+                type = application.config.config-mapping.function-type;
+              };
+              resources = mkOption {
+                description = "Compute resources required by an application";
+                type = functionTo application.config.config-mapping.output-type;
+                readOnly = true;
+                default = input: (application.config.implementation input).output;
+              };
+              config-mapping = mkOption {
+                description = "Function type for the mapping from application configuration to required resources";
+                type = submoduleWith {
+                  class = "module-function";
+                  modules = [ functionType ];
+                };
+                readOnly = true;
+                default = {
+                  input-type = application.config.module;
+                  output-type = application-requirements;
+                };
               };
             };
-          }
+          })
         ];
       });
     };
@@ -151,10 +138,7 @@ in
               };
               implementation = mkOption {
                 description = "Mapping of resources required by applications to available resources; the result can be deployed";
-                type = functionTo (submoduleWith {
+                type = environment.config.resource-mapping.function-type;
-                  class = "nixops4Deployment";
-                  modules = [ environment.config.resource-mapping.output-type ];
-                });
               };
               resource-mapping = mkOption {
                 description = "Function type for the mapping from resources to a (NixOps4) deployment";
@@ -164,7 +148,7 @@ in
                 };
                 readOnly = true;
                 default = {
-                  input-type = configuration;
+                  input-type = application-requirements;
                   output-type = nixops4Deployment;
                 };
               };
@@ -183,7 +167,7 @@ in
                       name: application-settings: config.applications.${name}.resources application-settings
                     ) cfg.applications;
                   in
-                  (environment.config.implementation required-resources);
+                  (environment.config.implementation required-resources).output;
 
               };
             };
@@ -191,5 +175,33 @@ in
         ];
       });
     };
+    configuration = mkOption {
+      description = "Configuration type declaring options to be set by operators";
+      type = optionType;
+      readOnly = true;
+      default = submoduleWith {
+        class = "fediversity-configuration";
+        modules = [
+          {
+            options = {
+              enable = lib.mkEnableOption {
+                description = "your Fediversity configuration";
+              };
+              applications = lib.mapAttrs (
+                _name: application:
+                mkOption {
+                  description = application.description;
+                  type = submoduleWith {
+                    class = "fediversity-application-config";
+                    modules = [ application.module ];
+                  };
+                  default = { };
+                }
+              ) config.applications;
+            };
+          }
+        ];
+      };
+    };
   };
 }